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Zhang J, Cao R, Song W, Liu L, Li J. One-step method to prepare core-shell magnetic nanocomposite encapsulating silver nanoparticles with superior catalytic and antibacterial activity. J Colloid Interface Sci 2021; 607:1730-1740. [PMID: 34598030 DOI: 10.1016/j.jcis.2021.09.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/31/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
A facile one-step method for synthesis of magnetic core-shell nanocomposite composed of h-Fe3O4 (hollow Fe3O4) core and stable PDA (polydopamine) shell with functional Ag NPs (silver nanoparticles) evenly distributed between them is developed. The h-Fe3O4@Ag/PDA nanocomposite showed excellent catalytic activity in the reaction for reducing azo dyes (methyl orange, methylene blue, and congo red), and the ratios of k values to the weight of h-Fe3O4@Ag/PDA were calculated to be 0.302, 0.0545, and 0.895 min-1 mg-1, respectively. Besides, the h-Fe3O4@Ag/PDA nanocomposite also exhibited good antibacterial activity in the experiment of culturing Bacillus subtilis, and the MIC (minimum inhibitory concentration) was as low as 12.5 μg/mL. Because the Ag NPs will not be leached in the solution under the protection of the PDA shell, the catalytic and antibacterial activities of h-Fe3O4@Ag/PDA nanocomposite could maintain more than 90% after five cycles. Intriguingly, this simple synthetic method can be extended to fabricate different multifunctional nanocomposites such as the spherical SiO2@Ag/PDA and rod-like Fe2O3@Ag/PDA. Overall, the facile fabrication process, the superior catalytic and antibacterial activity, and the excellent stability, endow the h-Fe3O4@Ag/PDA to be a promising nanocomposite.
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Affiliation(s)
- Jianfeng Zhang
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Ruya Cao
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Wencheng Song
- Anhui Province Key Laboratory of Medical Physics and Technology, Institute of Health & Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Lei Liu
- Anhui Province Key Laboratory of Medical Physics and Technology, Institute of Health & Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Jiaxing Li
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, PR China.
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52
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He C, Wang K, Fang K, Gong H, Jin Z, He Q, Wang Q. Up-concentration processes of organics for municipal wastewater treatment: New trends in separation. Sci Total Environ 2021; 787:147690. [PMID: 34004540 DOI: 10.1016/j.scitotenv.2021.147690] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/07/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
Carbon neutrality is a pressing goal for the whole society. Over 20% of municipality electrical energy on public utilities was consumed by the operation of wastewater treatment plants (WWTPs). Up-concentration of organic matters and maximum energy recovery is essential for a more sophisticated municipal wastewater management. Chemical coagulation and biological adsorption have been used to achieve efficient carbon capture, while separation is an overlooked step. It may lead to poor effluent quality, as well as consume most of the time and volume. The introduction of new driving forces, such as pressure and magnetism, significantly improved the retention rate and speed, respectively. In this paper, recent works were comprehensively reviewed and a horizontal comparison was conducted from aspects of separation speed, retention rate, concentrate characteristics and economic costs. This review also discussed the selection of technologies under different conditions. Finally, the practical application, fouling mitigation with considering the value of the concentrate, identification of unique concentrate characteristics, and the establishment of an evaluation system was suggested as core issues for future researches. This review will promote the development of an energy-efficient wastewater treatment system with up-concentration processes.
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Affiliation(s)
- Conghui He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Kuo Fang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
| | - Hui Gong
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Zhengyu Jin
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Qiuhang He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Qi Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
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53
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Huo JB, Yu G. Mesoporous cerium oxide-anchored magnetic polyhedrons derived from MIL-100(Fe) for enhanced removal of arsenite from aqueous solution. J Hazard Mater 2021; 415:125709. [PMID: 34088192 DOI: 10.1016/j.jhazmat.2021.125709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 03/15/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Efficient elimination of As(III) from drinking water and wastewater has been a challenge because of its neutral molecular form. To address this problem, a novel nanocomposite, mesoporous cerium oxide-anchored magnetic polyhedrons derived from MIL-100(Fe) was fabricated via a strategy combining impregnation and calcination. The resultant products (denoted as Fe2O3/CeO2-t) exhibited a unique octahedral nanostructure decorated by mesoporous cerium oxide. Surface modification of CeO2 enhanced As(III) removal in comparison to unmodified Fe2O3. Particularly, Fe2O3/CeO2-4 h can reduce As(III) concentration from 180 to 10 µg/L within 20 min, which was almost 9 times faster than unmodified Fe2O3. The adsorption behavior conformed to the pseudo-second-order kinetic model (R2 = 0.9908) and the Freundlich isotherm model (R2 = 0.9943). The maximum adsorption capacity of As(III) by Fe2O3/CeO2-4 h was 68.25 mg/g, higher than those reported for similar adsorbents. Its enhanced removal mechanism can be attributed mainly to the mesoporous characteristics and oxidization ability of surface ceria. The composite can be separated from water by external magnets and easily regenerated. This study may offer a clue to the design of metal-organic framework-based composites as an alternative adsorbent for arsenite cleanup.
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Affiliation(s)
- Jiang-Bo Huo
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China
| | - Guoce Yu
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
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54
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Luo Z, Paunović N, Leroux JC. Physical methods for enhancing drug absorption from the gastrointestinal tract. Adv Drug Deliv Rev 2021; 175:113814. [PMID: 34052229 DOI: 10.1016/j.addr.2021.05.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/17/2021] [Accepted: 05/20/2021] [Indexed: 01/01/2023]
Abstract
Overcoming the gastrointestinal (GI) barriers is a formidable challenge in the oral delivery of active macromolecules such as peptide- and protein- based drugs. In the past four decades, a plethora of formulation strategies ranging from permeation enhancers, nanosized carriers, and chemical modifications of the drug's structure has been investigated to increase the oral absorption of these macromolecular compounds. However, only limited successes have been achieved so far, with the bioavailability of marketed oral peptide drugs remaining generally very low. Recently, a few approaches that are based on physical interactions, such as magnetic, acoustic, and mechanical forces, have been explored in order to control and improve the drug permeability across the GI mucosa. Although in the early stages, some of these methods have shown great potential both in terms of improved bioavailability and spatiotemporal delivery of drugs. Here, we offer a concise, yet critical overview of these rather unconventional technologies with a particular focus on their potential and possible challenges for further clinical translation.
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Nitika, Rana A, Kumar V. Investigation on anneal-tuned properties of ZnFe 2O 4 nanoparticles for use in humidity sensors. Appl Phys A Mater Sci Process 2021; 127:609. [PMID: 34305333 PMCID: PMC8288411 DOI: 10.1007/s00339-021-04755-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/11/2021] [Indexed: 05/05/2023]
Abstract
The effect of different annealing temperatures on structural, optical and magnetic properties of ZnFe2O4 nanoparticles prepared using the coprecipitation technique has been investigated. With the increase in annealing temperature, crystallinity and average crystallite size of nanoparticles increased. The average crystallite size was found to be 5.55 nm, 6.62 nm and 32.9 nm for the samples annealed at 300 °C, 500 °C and 700 °C, respectively. The X-ray diffraction and Fourier-transform infrared spectroscopy revealed the formation of a cubic spinel structure. The optical direct and indirect bandgap energy decreased with an increase in annealing temperature. The saturation magnetization increased from 16.38 emu/g to 25.91 emu/g. The M-H curves depicted the magnetic phase transition from superparamagnetic to ferrimagnetic. The electrical properties were investigated using an impedance analyzer in the frequency range of 300 Hz to 1 MHz. The conduction properties showed enhancement with increased annealing. The humidity sensing properties were investigated in the range of 15-90% RH and revealed a strong dependence of adsorption capacity on the annealing temperature. Electrical conductivity improved with increased humidity. Excellent humidity sensitivity was observed for ferrites annealed at 700 °C attributed to increased crystallinity and reduced lattice strain making them a potential candidate for use in humidity sensors.
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Affiliation(s)
- Nitika
- Department of Physics, SRM University, Delhi NCR, Sonepat, 131029 India
| | - Anu Rana
- Department of Physics, SRM University, Delhi NCR, Sonepat, 131029 India
| | - Vinod Kumar
- Department of Physics, NSUT, Dwarka, New Delhi 110078 India
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Tang X, Qi H, Yang L, Xie Y, Ma Q, Yu W, Dong X, Li D, Liu G, Wang J. Novel photosensitive dual-anisotropic conductive Janus film endued with magnetic-luminescent properties and derivative 3D structures. J Colloid Interface Sci 2021; 601:899-914. [PMID: 34118776 DOI: 10.1016/j.jcis.2021.05.141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/20/2021] [Accepted: 05/23/2021] [Indexed: 10/21/2022]
Abstract
A new photosensitive dual-anisotropic conductive Janus film (PDCJF) is proposed for the first time. It is rationally designed and manufactured by facile electrospinning. PDCJF is firstly constructed using 2,7-dibromo-9-fluorenone (DBF) with photoconductive and luminescent properties. Janus nanofibers are respectively used as the building units to construct the top layer (T-PDCJF) and the bottom layer (B-PDCJF) of PDCJF. The two layers are tightly bonded to form PDCJF. Under light irradiation, there is photosensitive dual-anisotropic conduction in PDCJF, but there is no anisotropic conduction without light. Thus, the transition of PDCJF from mono-functional magnetism to tri-functionalities is realized under light and without light. The luminescence color of PDCJF is tunable and it emits white-light. This is made possible by modulating the amounts of luminescent substances and excitation wavelength. The microscopic Janus nanofibers used as building units and macroscopic Janus film structure ensure high photosensitive dual-anisotropic conduction and excellent fluorescence in PDCJF. The two-dimensional (2D) PDCJF is rolled to obtain three-dimensional (3D) Janus-type tubes and 2D plus 3D complete flag-like structures with exceptional multi-functionalities. The new findings can strongly guide in developing advanced multi-functional nanostructures.
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Affiliation(s)
- Xuehua Tang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Haina Qi
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Liu Yang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Yunrui Xie
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Qianli Ma
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Wensheng Yu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Xiangting Dong
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
| | - Dan Li
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Guixia Liu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
| | - Jinxian Wang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China
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57
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Wu W, Yin B, Peng W, Zhao Y, Zhou Z, Sheng H, Ma W, Zhang C. Magnetically modulated photochemical reaction pathways in anthraquinone molecules and aggregates. iScience 2021; 24:102458. [PMID: 34113816 PMCID: PMC8169793 DOI: 10.1016/j.isci.2021.102458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 04/01/2021] [Accepted: 04/19/2021] [Indexed: 12/25/2022] Open
Abstract
The chemical reactions involving excited-state radical pairs (RPs) of parallel/anti-parallel spin configurations are sensitive to magnetic field, leading to the possibilities of magnetically controlled synthesis of chemical compounds. Here we show that the reaction of anthraquinone (AQ) in sodium dodecyl sulfate (SDS) micellar solution under UV excitation is significantly influenced by applying external field. The steady state and time-resolved spectroscopies reveal that the reaction intermediate (pairs of AQH-SDS radicals) can undergo two distinct pathways depending on whether it is spin singlet or triplet, and the field is beneficial to the conversion between spin configurations of RPs. The applied field not only affects the reaction rate constant but also changes the final products. Besides, the aggregation of AQ molecules would change the population of singlets and triplets and thus enhance magnetic field effect. This work represents a promising way of controlling chemical reaction and improving reaction selectivity via magnetic field methods.
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Affiliation(s)
- Wubin Wu
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baipeng Yin
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Peng
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yukun Zhao
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zeyang Zhou
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hua Sheng
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wanhong Ma
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuang Zhang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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58
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Qin L, Zhang HL, Zhai YQ, Nojiri H, Schröder C, Zheng YZ. A giant spin molecule with ninety-six parallel unpaired electrons. iScience 2021; 24:102350. [PMID: 33898945 PMCID: PMC8054144 DOI: 10.1016/j.isci.2021.102350] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/20/2021] [Accepted: 03/18/2021] [Indexed: 11/12/2022] Open
Abstract
Unpaired electrons which are essential for organic radicals and magnetic materials are hardly to align parallel, especially upon the increasing of spin numbers. Here, we show that the antiferromagnetic interaction in the largest Cr(III)-RE (rare earth) cluster {Cr10RE18} leads to 96 parallel electrons, forming a ground spin state ST of 48 for RE = Gd. This is so far the third largest ground spin state achieved in one molecule. Moreover, by using the classical Monte Carlo simulation, the exchange coupling constants Jij can be determined. Spin dynamics simulation reveals that the strong Zeeman effects of 18 Gd(III) ions stabilize the ground ferrimagnetic state and hinder the magnetization reversals of these spins. In addition, the dysprosium(III) analog is an exchange-biasing single-molecule magnet. We believe that the ferrimagnetic approach and analytical protocol established in this work can be applied generally in constructing and analyzing giant spin molecules. The largest {Cr10RE18} molecular clusters were assembled for RE = Gd, Dy, and Y The {Cr10Gd18} cluster shows a large ground spin state of ST = 48 The exchange coupling constants were determined by Classical Monte Carlo simulation Spin dynamics simulation reveals a ferrimagnetic ground state of {Cr10Gd18}.
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Affiliation(s)
- Lei Qin
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research Academy, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, Xi'an 710054, China
| | - Hao-Lan Zhang
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research Academy, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, Xi'an 710054, China
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research Academy, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, Xi'an 710054, China
| | - Hiroyuki Nojiri
- Institute of Materials Research (IMR), Tohoku University, Katahira, Sendai 980-8577, Japan
| | - Christian Schröder
- Bielefeld Institute for Applied Materials Research, Bielefeld University of Applied Sciences, D-33619 Bielefeld, Germany.,Faculty of Physics, Bielefeld University, D-33615 Bielefeld, Germany
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research Academy, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, Xi'an 710054, China
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Chen Y, Yumnam G, Guo J, Stingaciu L, Zolnierczuk P, Lauter V, Singh DK. Magnetic charge's relaxation propelled electricity in two-dimensional magnetic honeycomb lattice. iScience 2021; 24:102206. [PMID: 33733067 PMCID: PMC7937569 DOI: 10.1016/j.isci.2021.102206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/14/2021] [Accepted: 02/16/2021] [Indexed: 11/20/2022] Open
Abstract
Emerging new concepts, such as magnetic charge dynamics in two-dimensional magnetic material, can provide novel mechanism for spin-based electrical transport at macroscopic length. In artificial spin ice of single domain elements, magnetic charge's relaxation can create an efficient electrical pathway for conduction by generating fluctuations in local magnetic field that couple with conduction electron spins. In a first demonstration, we show that the electrical conductivity is propelled by more than an order of magnitude at room temperature due to magnetic charge defects sub-picosecond relaxation in artificial magnetic honeycomb lattice. The direct evidence to the proposed electrical conduction mechanism in two-dimensional frustrated magnet points to the untapped potential for spintronic applications in this system.
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Affiliation(s)
- Yiyao Chen
- Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA
| | - George Yumnam
- Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA
| | - Jiasen Guo
- Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA
| | - Laura Stingaciu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Piotr Zolnierczuk
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Forschungszentrum Julich GmbH, JCNS Outstation at SNS, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Valeria Lauter
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Deepak K. Singh
- Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA
- Corresponding author
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60
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Abstract
With the development of machine learning in recent years, it is possible to glean much more information from an experimental data set to study matter. In this perspective, we discuss some state-of-the-art data-driven tools to analyze latent effects in data and explain their applicability in natural science, focusing on two recently introduced, physics-motivated computationally cheap tools-latent entropy and latent dimension. We exemplify their capabilities by applying them on several examples in the natural sciences and show that they reveal so far unobserved features such as, for example, a gradient in a magnetic measurement and a latent network of glymphatic channels from the mouse brain microscopy data. What sets these techniques apart is the relaxation of restrictive assumptions typical of many machine learning models and instead incorporating aspects that best fit the dynamical systems at hand.
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Affiliation(s)
- Davi Röhe Rodrigues
- Institute of Physics, Johannes Gutenberg University of Mainz, 55128 Mainz, Germany
| | | | - Susanne Gerber
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Illia Horenko
- Università della Svizzera Italiana, Faculty of Informatics, Via G. Buffi 13, 6900 Lugano, Switzerland
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61
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Powell CD, Lounsbury AW, Fishman ZS, Coonrod CL, Gallagher MJ, Villagran D, Zimmerman JB, Pfefferle LD, Wong MS. Nano-structural effects on Hematite (α-Fe 2O 3) nanoparticle radiofrequency heating. Nano Converg 2021; 8:8. [PMID: 33686471 PMCID: PMC7940460 DOI: 10.1186/s40580-021-00258-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Nano-sized hematite (α-Fe2O3) is not well suited for magnetic heating via an alternating magnetic field (AMF) because it is not superparamagnetic-at its best, it is weakly ferromagnetic. However, manipulating the magnetic properties of nano-sized hematite (i.e., magnetic saturation (Ms), magnetic remanence (Mr), and coercivity (Hc)) can make them useful for nanomedicine (i.e., magnetic hyperthermia) and nanoelectronics (i.e., data storage). Herein we study the effects of size, shape, and crystallinity on hematite nanoparticles to experimentally determine the most crucial variable leading to enhancing the radio frequency (RF) heating properties. We present the synthesis, characterization, and magnetic behavior to determine the structure-property relationship between hematite nano-magnetism and RF heating. Increasing particle shape anisotropy had the largest effect on the specific adsorption rate (SAR) producing SAR values more than 6 × greater than the nanospheres (i.e., 45.6 ± 3 W/g of α-Fe2O3 nanorods vs. 6.89 W/g of α-Fe2O3 nanospheres), indicating α-Fe2O3 nanorods can be useful for magnetic hyperthermia.
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Affiliation(s)
- Camilah D Powell
- Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, TX, USA
| | - Amanda W Lounsbury
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, TX, USA
- Chemical and Environmental Engineering, Yale University, New Haven, CT, USA
| | - Zachary S Fishman
- Chemical and Environmental Engineering, Yale University, New Haven, CT, USA
| | - Christian L Coonrod
- Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, TX, USA
| | | | - Dino Villagran
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, TX, USA
- Chemistry, University of Texas At El Paso, El Paso, TX, USA
| | - Julie B Zimmerman
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, TX, USA
- Chemical and Environmental Engineering, Yale University, New Haven, CT, USA
| | - Lisa D Pfefferle
- Chemical and Environmental Engineering, Yale University, New Haven, CT, USA
| | - Michael S Wong
- Chemical and Biomolecular Engineering, Rice University, Houston, TX, USA.
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, TX, USA.
- Civil and Environmental Engineering, Rice University, Houston, TX, USA.
- Chemistry, Rice University, Houston, TX, USA.
- Material Science and NanoEngineering, Rice University, Houston, TX, USA.
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62
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Kermenidou M, Balcells L, Martinez-Boubeta C, Chatziavramidis A, Konstantinidis I, Samaras T, Sarigiannis D, Simeonidis K. Magnetic nanoparticles: An indicator of health risks related to anthropogenic airborne particulate matter. Environ Pollut 2021; 271:116309. [PMID: 33387781 DOI: 10.1016/j.envpol.2020.116309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 12/01/2020] [Accepted: 12/12/2020] [Indexed: 06/12/2023]
Abstract
Due to their small dimensions, airborne particles are able to penetrate through inhalation into many human organs, from the lungs to the cardiovascular system and the brain, which can threaten our health. This work establishes a novel approach of collecting quantitative data regarding the fraction, the composition and the size distribution of combustion-emitted particulate matter through the magnetic characterization and analysis of samples received by common air pollution monitoring. To this end, SQUID magnetometry measurements were carried out for samples from urban and suburban areas in Thessaloniki, the second largest city of Greece, taking into consideration the seasonal and weekly variation of airborne particles levels as determined by occurring traffic and meteorological conditions. The level of estimated magnetically-responding atmospheric particulate matter was at least 0.5 % wt. of the collected samples, mostly being present in the form of ultrafine particles with nuclei sizes of approximately 14 nm and their aggregates. The estimated quantities of magnetic particulate matter show maximum values during autumn months (0.8 % wt.) when increased commuting takes place, appearing higher in the city center by up to 50% than those in suburban areas. In combination with high-resolution transmission electron imaging and elemental analysis, it was found that Fe3O4 and similar ferrites, some of them attached to heavy metals (Co, Cr), are the dominant magnetic contributors arising from anthropogenic high-temperature processes, e.g. due to traffic emissions. Importantly, nasal cytologic samples collected from residents of both central and suburban areas showed same pattern in what concerns magnetic behavior, thus verifying the critical role of nanosized magnetic particles in the assessment of air pollution threats. Despite the inherent statistical limitations of our study, such findings also indicate the potential transmission of infectious pathogens by means of pollution-derived nanoparticles into the respiratory system of the human body.
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Affiliation(s)
- M Kermenidou
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ll Balcells
- Institut de Ciència de Materials de Barcelona, CSIC, 08193 Bellaterra, Spain
| | - C Martinez-Boubeta
- Ecoresources P.C., Giannitson-Santaroza Str. 15-17, 54627 Thessaloniki, Greece
| | - A Chatziavramidis
- 2nd Academic Otorhinolaryngology Department, General Hospital Papageorgiou, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece
| | - I Konstantinidis
- 2nd Academic Otorhinolaryngology Department, General Hospital Papageorgiou, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece
| | - T Samaras
- Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - D Sarigiannis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - K Simeonidis
- Ecoresources P.C., Giannitson-Santaroza Str. 15-17, 54627 Thessaloniki, Greece; Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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63
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Sun Y, Li X, Zheng W. Facile synthesis of core-shell phase-transited lysozyme coated magnetic nanoparticle as a novel adsorbent for Hg(II) removal in aqueous solutions. J Hazard Mater 2021; 403:124012. [PMID: 33265041 DOI: 10.1016/j.jhazmat.2020.124012] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/02/2020] [Accepted: 09/15/2020] [Indexed: 06/12/2023]
Abstract
Adsorption using nanomaterials is considered an effective method for controlling the levels of toxic heavy metal in wastewater. Herein, a novel adsorbent, core-shell phase-transited lysozyme film-coated magnetic nanoparticles (Fe3O4@SiO2@PTL) for Hg(II) ions removal from aqueous solutions was explored via facile and fast phase transformation and self-assembly process of lysozyme. The physiochemical properties of Fe3O4@SiO2@PTL were investigated using various characterization techniques. The adsorption performances such as kinetics, isotherms, selectivity, the effect of coexisting ions, and regeneration were evaluated. Fe3O4@SiO2@PTL showed an extremely high Hg(II) uptake rate and achieved more than 90% equilibrium adsorption capacity in 5 min. Hg(II) adsorption was followed by a pseudo-second-order kinetic model and fitted the Langmuir model by achieving a maximum uptake of 701.51 mg/g. Furthermore, excellent Hg(II) selectivity was obtained in a mixed solution containing various heavy metal ions, along with good chemical stability owing to the high adsorption capacity maintained after five cycles. The adsorption analyses indicated that the amino, imino, amide, hydroxyl, carboxyl, and thiol groups exposed on the surface of Fe3O4@SiO2@PTL were vital for Hg(II) removal. Consequently, this work will significantly assist in the development of an easily available, eco-friendly, and selective adsorbent material to remove heavy metal ions from wastewater.
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Affiliation(s)
- Yue Sun
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China.
| | - Xiao Li
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
| | - Weisheng Zheng
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
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Abstract
The expeditious development of information technology has led to the rise of artificial intelligence (AI). However, conventional computing systems are prone to volatility, high power consumption, and even delay between the processor and memory, which is referred to as the von Neumann bottleneck, in implementing AI. To address these issues, memristor-based neuromorphic computing systems inspired by the human brain have been proposed. A memristor can store numerous values by changing its resistance and emulate artificial synapses in brain-inspired computing. Here, we introduce six types of memristors classified according to their operation mechanisms: ionic migration, phase change, spin, ferroelectricity, intercalation, and ionic gating. We review how memristor-based neuromorphic computing can learn, infer, and even create, using various artificial neural networks. Finally, the challenges and perspectives in the competing memristor technology for neuromorphic computing systems are discussed.
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Affiliation(s)
- Seung Ju Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang Bum Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Ho Won Jang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
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65
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Chen Z, Mu D, Liu T, He Z, Zhang Y, Yang H, Ouyang J. PANI/BaFe 12O 19@Halloysite ternary composites as novel microwave absorbent. J Colloid Interface Sci 2021; 582:137-148. [PMID: 32818711 DOI: 10.1016/j.jcis.2020.08.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/02/2020] [Accepted: 08/03/2020] [Indexed: 11/19/2022]
Abstract
A three-phase PANI/BaFe12O19@Hal heterostructure was designed and fabricated in this paper as efficient lightweight electromagnetic wave absorbing material through the combination of citrate assisted sol-gel self-propagating combustion and in-situ oxidative polymerization of aniline. In addition, the effects of the weight ratio of different PANI to BF@Hal on the microwave absorption properties of the materials were studied. The results show that when the weight ratio of PANI is 40%, the material has the best microwave absorption performance. The frequency bandwidth below -5 dB reached 9.60 GHz and the minimum absorption peak at 11.92 GHz was -14.77 dB. The combination of the PANI and BF@Hal nanosheets take advantage of the interfacial polarization, natural resonance, dielectric polarization and trapping of EM waves by internal reflection in PANI/BaFe12O19@Hal. Taking advantage of the unique microscopic morphology and interface characteristics, halloysite was introduced to improve the microwave absorption performance and enrich the absorbing mechanism of the composite materials. This work may provide a reliable candidate for the synthesis of electromagnetic attenuation materials with fairly good performances.
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Affiliation(s)
- Zihao Chen
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China
| | - Dawei Mu
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China
| | - Tianhao Liu
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China
| | - Zilong He
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China
| | - Yi Zhang
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China
| | - Huaming Yang
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China
| | - Jing Ouyang
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China.
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66
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Tao Q, Bi J, Huang X, Wei R, Wang T, Zhou Y, Hao H. Fabrication, application, optimization and working mechanism of Fe 2O 3 and its composites for contaminants elimination from wastewater. Chemosphere 2021; 263:127889. [PMID: 32828053 DOI: 10.1016/j.chemosphere.2020.127889] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/20/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
Fe2O3 and its composites have been extensively investigated and employed for the remediation of contaminated water with the characteristics of low cost, outstanding chemical stability, high efficiency of visible light utilization, excellent magnetic ability and abundant active sites for adsorption and degradation. In this review, the potentials of Fe2O3 in water remediation were discussed and summarized in detail. Firstly, various synthesis methods of Fe2O3 and its composites were reviewed and compared. Based on the structures and characteristics of the obtained materials, their applications and related mechanisms in pollutants removal were surveyed and discussed. Furthermore, several strategies for optimizing the remediation processes, including dispersion, immobilization, nano/micromotor construction and simultaneous decontamination, were also highlighted and discussed. Finally, recommendations for further work in the development of novel Fe2O3-related materials and its practical applications were proposed.
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Affiliation(s)
- Qingqing Tao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Jingtao Bi
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Xin Huang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Rongli Wei
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Ting Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Yanan Zhou
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China; College of Chemical Engineering, North China University of Science and Technology, Tangshan, 063210, China.
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China; Co-Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China.
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67
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Wang J, Shao X, Liu J, Zhang Q, Ji X, Tian G. Mesoporous magnetic g-C 3N 4 nanocomposites for photocatalytic environmental remediation under visible light. Ecotoxicol Environ Saf 2020; 205:111147. [PMID: 32836157 DOI: 10.1016/j.ecoenv.2020.111147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/05/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Mesoporous magnetic Fe3O4/g-C3N4 nanocomposites were synthesized by a facile precipitation method using deionized water as solution. And the prepared magnetic materials were characterized by mean of various detection methods. At the same time, the photocatalytic activity of the synthetic material as photocatalyst under visible light was tested by taking the degradation of rhodamine B in water as a mark. Results show that as-synthesized Fe3O4/g-C3N4 nanocomposites have high specific surface areas of about 5-10.5 times that of pure g-C3N4 and high saturation magnetizations, which can ensure the smooth recovery of used nanomaterials under the action of external magnetic field. The addition of Fe3O4 greatly extents the response range of g-C3N4 nanomaterials to visible light and reduces the recombination rate of photoinduced electron-hole pairs. Meanwhile, the photocatalytic activity of the synthetic materials increases so that the degradation ratio of rhodamine B in water reached 97.6% after 4 h visible light irradiation. Furthermore, prepared magnetic Fe3O4/g-C3N4 nanocomposites have also excellent stability so that the degradation ratio of rhodamine B was almost not reduce after 5 times of continuous reuse of photocatalyst. Free radical scavenging experiments shows that hydroxyl groups are the main free radicals of photocatalytic reaction, peroxyradicals and holes play the secondary role. Therefore, it can be predicted that the synthesized mesoporous magnetic Fe3O4/g-C3N4 nanomaterials will have a broad application prospect in environmental remediation.
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Affiliation(s)
- Junhong Wang
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, PR China.
| | - Xianzhao Shao
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, PR China
| | - Junhai Liu
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, PR China
| | - Qiang Zhang
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, PR China
| | - Xiaohui Ji
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, PR China
| | - Guanghui Tian
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong, 723000, PR China
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68
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Liu N, Guo N, Sun L, Liu S, Wang G, Zhao Y. Controlled Synthesis and Properties of 3d-4f Metals Co-doped Polyoxometalates-Based Materials. Nanoscale Res Lett 2020; 15:205. [PMID: 33146756 PMCID: PMC7642100 DOI: 10.1186/s11671-020-03431-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 10/11/2020] [Indexed: 06/11/2023]
Abstract
It is challenging to explore and prepare polyoxometalates-based nanomaterials (PNMs) with controllable morphologies and diversiform components. Herein, 3d-4f metals are introduced into isopolyoxometalates and Anderson-type polyoxometalates, CeCdW12 nanoflower and EuCrMo6 microflaky have been fabricated respectively. A series of control experiments are carried out to identify the impact factors on the rare morphologies in PNMs. Furthermore, upon excitation at 396 nm, the emission spectrum of EuCrMo6 displays five prominent f - f emitting peaks at 674, 685, 690, 707, and 734 nm that are assigned to Eu3+ 5D0 → 7FJ (J = 0, 1, 2, 3, 4) transitions. Meanwhile, the VSM results show that the Cr+3 ions in EuCrMo6 display anti-ferromagnetic interactions when the temperature is lower than - 17.54 K. After rising temperature, this material exhibits paramagnetic property. This work opens up strategies toward the brand new morphologies and components of PNMs, endowing this kind of material with new functions.
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Affiliation(s)
- Ning Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, China
| | - Ningning Guo
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, China
| | - Lin Sun
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, China
| | - Shixian Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, China
| | - Guan Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, China.
| | - Yuan Zhao
- The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, China.
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69
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Bonawitz E, Ullman TD, Bridgers S, Gopnik A, Tenenbaum JB. Sticking to the Evidence? A Behavioral and Computational Case Study of Micro-Theory Change in the Domain of Magnetism. Cogn Sci 2020; 43:e12765. [PMID: 31446650 DOI: 10.1111/cogs.12765] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/14/2019] [Accepted: 05/21/2019] [Indexed: 11/29/2022]
Abstract
Constructing an intuitive theory from data confronts learners with a "chicken-and-egg" problem: The laws can only be expressed in terms of the theory's core concepts, but these concepts are only meaningful in terms of the role they play in the theory's laws; how can a learner discover appropriate concepts and laws simultaneously, knowing neither to begin with? We explore how children can solve this chicken-and-egg problem in the domain of magnetism, drawing on perspectives from computational modeling and behavioral experiments. We present 4- and 5-year-olds with two different simplified magnet-learning tasks. Children appropriately constrain their beliefs to two hypotheses following ambiguous but informative evidence. Following a critical intervention, they learn the correct theory. In the second study, children infer the correct number of categories given no information about the possible causal laws. Children's hypotheses in these tasks are explained as rational inferences within a Bayesian computational framework.
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Affiliation(s)
| | | | | | - Alison Gopnik
- Department of Psychology, Rutgers University - Newark
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70
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Zhang L, Park C, Yoon M. Quantum Phase Engineering of Two-Dimensional Post-Transition Metals by Substrates: Toward a Room-Temperature Quantum Anomalous Hall Insulator. Nano Lett 2020; 20:7186-7192. [PMID: 32930599 DOI: 10.1021/acs.nanolett.0c02520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We propose a new strategy to engineer topological and magnetic properties of two-dimensional (2D) hexagonal lattices consisting of post-transition metals. Our first-principles calculations demonstrate that substrates serve as templates to form 2D lattices with high thermodynamic stability, where their topological properties as well as magnetic properties sensitively change as a function of lattice constants, i.e., the system undergoes a first-order phase transition from nonmagnetic to ferromagnetic state above a critical lattice constant. Consequently, substrates can be used to explore versatile magnetic, electronic, and quantum topological properties. We establish phase diagrams of versatile quantum phases in terms of exchange coupling and spin-orbit coupling effectively tuned by the lattice constants. We further reveal the first room-temperature quantum anomalous Hall (QAH) effect, i.e., Sn on 2√3 × 2√3 graphane is a QAH insulator with a large spin-orbit coupling gap of ∼0.2 eV and a Curie temperature of ∼380 K by using the 2D anisotropic Heisenberg model.
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Affiliation(s)
- Lizhi Zhang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, United States
| | - Changwon Park
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, United States
| | - Mina Yoon
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37916, United States
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71
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Balasubramanian PS, Spincemaille P, Guo L, Huang W, Kovanlikaya I, Wang Y. Spatially Adaptive Regularization in Total Field Inversion for Quantitative Susceptibility Mapping. iScience 2020; 23:101553. [PMID: 33083722 PMCID: PMC7522736 DOI: 10.1016/j.isci.2020.101553] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 07/18/2020] [Accepted: 09/09/2020] [Indexed: 11/28/2022] Open
Abstract
Adaptive Total Field Inversion is described for quantitative susceptibility mapping (QSM) reconstruction from total field data through a spatially adaptive suppression of shadow artifacts through spatially adaptive regularization. The regularization for shadow suppression consists of penalizing low-frequency components of susceptibility in regions of small susceptibility contrasts as estimated by R2∗ derived signal intensity. Compared with a conventional local field method and two previously proposed regularized total field inversion methods, improvements were demonstrated in phantoms and subjects without and with hemorrhages. This algorithm, named TFIR, demonstrates the lowest error in numerical and gadolinium phantom datasets. In COSMOS data, TFIR performs well in matching ground truth in high-susceptibility regions. For patient data, TFIR comes close to meeting the quality of the reference local field method and outperforms other total field techniques in both clinical scores and shadow reduction. TFIR's adaptive regularization obtains magnetic susceptibility from magnetic field TFIR has low artifact incidence on both quantitative and clinical scores The error for TFIR is low on various numerical and ground truth tests Clinical applications for TFIR include hemorrhages and whole head mapping
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Affiliation(s)
- Priya S Balasubramanian
- Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.,Department of Radiology, Weill Cornell Medicine, New York, NY 10065, USA
| | | | - Lingfei Guo
- Department of Radiology, Weill Cornell Medicine, New York, NY 10065, USA
| | - Weiyuan Huang
- Department of Radiology, Weill Cornell Medicine, New York, NY 10065, USA
| | - Ilhami Kovanlikaya
- Department of Radiology, Weill Cornell Medicine, New York, NY 10065, USA
| | - Yi Wang
- Department of Radiology, Weill Cornell Medicine, New York, NY 10065, USA.,Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
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72
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Long J, Basalov IV, Lyssenko KA, Cherkasov AV, Mamontova E, Guari Y, Larionova J, Trifonov AA. Synthesis, Structure, Magnetic and Photoluminescent Properties of Dysprosium(III) Schiff Base Single-Molecule Magnets: Investigation of the Relaxation of the Magnetization. Chem Asian J 2020; 15:2706-2715. [PMID: 32633054 DOI: 10.1002/asia.202000658] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/03/2020] [Indexed: 12/15/2022]
Abstract
We report here the synthesis, structure, magnetic and photoluminescent properties of three new bifunctional Schiff-base complexes [Dy(L1 )2 (py)2 ][B(Ph)4 ]⋅py (1), [Dy(L1 )2 Cl(DME)] ⋅ 0.5DME (2) and [Dy(L2 )2 Cl] ⋅ 2.5(C7 H8 ) (3) (HL1 =Phenol, 2,4-bis(1,1-dimethylethyl)-6-[[(2-methoxy-5-methylphenyl)imino]methyl]; HL2 =Phenol, 2,4-bis(1,1-dimethylethyl)-6-[[(2-methoxyphenyl)imino]methyl]). The coordination environment of the Dy3+ ion and the direction of the anisotropic axis may be controlled by the combination of the substituent groups of the Schiff bases, the nature of the counter-ions (Cl- vs. BPh4 - ) and the coordinative solvent molecules. A zero-field slow relaxation of the magnetization is evidenced for all complexes but strong differences in the relaxation dynamics are observed depending on the Dy3+ site geometry. In this sense, complex 1 exhibits an anisotropy barrier of 472 cm-1 , which may be favourably compared to other related examples due to the shortening of the Dy-O bond in the axial direction. Besides, the three complexes exhibit a ligand-based luminescence making them as bifunctional magneto-luminescent systems.
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Affiliation(s)
- Jérôme Long
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Ivan V Basalov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | - Konstantin A Lyssenko
- Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.,Lomonosov Moscow State Univ., Dept. Chem, Leninskie Gory 1, Build 3, Moscow, 119991, Russia
| | - Anton V Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | | | - Yannick Guari
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Alexander A Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia.,Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
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Wang W, Sun W, Zhang G, Ren F, Wang Y, You C, Cheng Z. Ferroelectrically tunable magnetism in BiFeO 3/BaTiO 3 heterostructure revealed by the first-principles calculations. J Adv Res 2020; 24:371-377. [PMID: 32477607 PMCID: PMC7248427 DOI: 10.1016/j.jare.2020.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 12/02/2022] Open
Abstract
The perovskite oxide interface has attracted extensive attention as a platform for achieving strong coupling between ferroelectricity and magnetism. In this work, robust control of magnetoelectric (ME) coupling in the BiFeO3/BaTiO3 (BFO/BTO) heterostructure (HS) was revealed by using the first-principles calculation. Switching of the ferroelectric polarization of BTO induce large ME effect with significant changes on the magnetic ordering and easy magnetization axis, making up for the weak ME coupling effect of single-phase multiferroic BFO. In addition, the Dzyaloshinskii-Moriya interaction (DMI) and the exchange coupling constants J for the BFO part of the HSs are simultaneously manipulated by the ferroelectric polarization, especially the DMI at the interface is significantly enhanced, which is three or four times larger than that of the individual BFO bulk. This work paves the way for designing new nanomagnetic devices based on the substantial interfacial ME effect.
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Affiliation(s)
- Wenxuan Wang
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
| | - Wei Sun
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
| | - Guangbiao Zhang
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
| | - Fengzhu Ren
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
| | - Yuanxu Wang
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
- National Demonstration Center for Experimental Physics and Electronics Education, School of Physics, Henan University, Kaifeng 475004, People’s Republic of China
| | - Caiyin You
- School of Materials Science & Engineering, Xi’an University of Technology, Xi’an 710048, People’s Republic of China
| | - Zhenxiang Cheng
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
- Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia
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74
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Dun Z, Bai X, Paddison JAM, Hollingworth E, Butch NP, Cruz CD, Stone MB, Hong T, Demmel F, Mourigal M, Zhou H. Quantum Versus Classical Spin Fragmentation in Dipolar Kagome Ice Ho 3Mg 2Sb 3O 14. Phys Rev X 2020; 10:10.1103/PhysRevX.10.031069. [PMID: 37731951 PMCID: PMC10510738 DOI: 10.1103/physrevx.10.031069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
A promising route to realize entangled magnetic states combines geometrical frustration with quantum-tunneling effects. Spin-ice materials are canonical examples of frustration, and Ising spins in a transverse magnetic field are the simplest many-body model of quantum tunneling. Here, we show that the tripod-kagome lattice material Ho3Mg2Sb3O14 unites an icelike magnetic degeneracy with quantum-tunneling terms generated by an intrinsic splitting of the Ho3+ ground-state doublet, which is further coupled to a nuclear spin bath. Using neutron scattering and thermodynamic experiments, we observe a symmetry-breaking transition at T * ≈ 0.32 K to a remarkable state with three peculiarities: a concurrent recovery of magnetic entropy associated with the strongly coupled electronic and nuclear degrees of freedom; a fragmentation of the spin into periodic and icelike components; and persistent inelastic magnetic excitations down to T ≈ 0.12 K . These observations deviate from expectations of classical spin fragmentation on a kagome lattice, but can be understood within a model of dipolar kagome ice under a homogeneous transverse magnetic field, which we survey with exact diagonalization on small clusters and mean-field calculations. In Ho3Mg2Sb3O14, hyperfine interactions dramatically alter the single-ion and collective properties, and suppress possible quantum correlations, rendering the fragmentation with predominantly single-ion quantum fluctuations. Our results highlight the crucial role played by hyperfine interactions in frustrated quantum magnets and motivate further investigations of the role of quantum fluctuations on partially ordered magnetic states.
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Affiliation(s)
- Zhiling Dun
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Xiaojian Bai
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Joseph A. M. Paddison
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
- Churchill College, University of Cambridge, Storey’s Way, Cambridge CB3 0DS, United Kingdom
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Emily Hollingworth
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | | | - Clarina D. Cruz
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Matthew B. Stone
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Tao Hong
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Franz Demmel
- ISIS Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Martin Mourigal
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Haidong Zhou
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
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75
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Chen J, Hu J, Yu H. Chiral Magnonics: Reprogrammable Nanoscale Spin Wave Networks Based on Chiral Domain Walls. iScience 2020; 23:101153. [PMID: 32450517 PMCID: PMC7251948 DOI: 10.1016/j.isci.2020.101153] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/03/2020] [Accepted: 05/06/2020] [Indexed: 11/22/2022] Open
Abstract
Spin waves offer promising perspectives as information carriers for future computational architectures beyond conventional complementary metal-oxide-semiconductor (CMOS) technology, owing to their benefits for device minimizations and low-ohmic losses. Although plenty of magnonic devices have been proposed previously, scalable nanoscale networks based on spin waves are still missing. Here, we demonstrate a reprogrammable two-dimensional spin wave network by combining the chiral exchange spin waves and chiral domain walls. The spin-wave network can be extended to two dimensions and offers unprecedented control of exchange spin waves. Each cell in the network can excite, transmit, and detect spin waves independently in the chiral domain wall, and spin-wave logics are also demonstrated. Our results open up perspectives for integrating spin waves into future logic and computing circuits and networks.
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Affiliation(s)
- Jilei Chen
- Fert Beijing Institute, BDBC, School of Microelectronics, Beihang University, Beijing, China.
| | - Junfeng Hu
- Fert Beijing Institute, BDBC, School of Microelectronics, Beihang University, Beijing, China
| | - Haiming Yu
- Fert Beijing Institute, BDBC, School of Microelectronics, Beihang University, Beijing, China.
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76
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Shorikov AO, Skornyakov SL, Anisimov VI, Streltsov SV, Poteryaev AI. Influence of Molecular Orbitals on Magnetic Properties of [x]. Molecules 2020; 25:molecules25092211. [PMID: 32397292 PMCID: PMC7248845 DOI: 10.3390/molecules25092211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/02/2020] [Accepted: 05/04/2020] [Indexed: 11/16/2022] Open
Abstract
Recent discoveries of various novel iron oxides and hydrides, which become stable at very high pressure and temperature, are extremely important for geoscience. In this paper, we report the results of an investigation on the electronic structure and magnetic properties of the hydride FeO 2 H x , using density functional theory plus dynamical mean-field theory (DFT+DMFT) calculations. An increase in the hydrogen concentration resulted in the destruction of dimeric oxygen pairs and, hence, a specific band structure of FeO 2 with strongly hybridized Fe- t 2 g -O- p z anti-bonding molecular orbitals, which led to a metallic state with the Fe ions at nearly 3+. Increasing the H concentration resulted in effective mass enhancement growth which indicated an increase in the magnetic moment localization. The calculated static momentum-resolved spin susceptibility demonstrated that an incommensurate antiferromagnetic (AFM) order was expected for FeO 2 , whereas strong ferromagnetic (FM) fluctuations were observed for FeO 2 H.
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Affiliation(s)
- Alexey O. Shorikov
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (A.O.S.); (S.L.S.); (V.I.A.); (S.V.S.)
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia
- Skolkovo Institute of Science and Technology, 3 Nobel Street, 143026 Moscow, Russia
| | - Sergey L. Skornyakov
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (A.O.S.); (S.L.S.); (V.I.A.); (S.V.S.)
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia
- Skolkovo Institute of Science and Technology, 3 Nobel Street, 143026 Moscow, Russia
| | - Vladimir I. Anisimov
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (A.O.S.); (S.L.S.); (V.I.A.); (S.V.S.)
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia
- Skolkovo Institute of Science and Technology, 3 Nobel Street, 143026 Moscow, Russia
| | - Sergey V. Streltsov
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (A.O.S.); (S.L.S.); (V.I.A.); (S.V.S.)
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia
| | - Alexander I. Poteryaev
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108 Ekaterinburg, Russia; (A.O.S.); (S.L.S.); (V.I.A.); (S.V.S.)
- Skolkovo Institute of Science and Technology, 3 Nobel Street, 143026 Moscow, Russia
- Correspondence:
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77
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Hu L, Guang C, Liu Y, Su Z, Gong S, Yao Y, Wang Y. Adsorption behavior of dyes from an aqueous solution onto composite magnetic lignin adsorbent. Chemosphere 2020; 246:125757. [PMID: 31896011 DOI: 10.1016/j.chemosphere.2019.125757] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 12/09/2019] [Accepted: 12/25/2019] [Indexed: 05/20/2023]
Abstract
Magnetic lignosulfonate functional materials that were known to remove several types of dye from water effectively were prepared. The surface of an iron (II,III) oxide (Fe3O4) sample was coated with a layer of organic carbon, and magnetic lignosulfonate (FCS) was synthesised by a crosslinking agent. The morphology, structure, stability and magnetic properties of the materials were characterised by various testing methods. Under experimental conditions, the solution's acidity, alkalinity, contact time, temperature, desorption and dye concentration were measured. The experimental results show that the material reached the highest adsorption capacity at pH = 7. In addition, the adsorption data was similar to that of a single layer, Langmuir adsorption model. The maximum adsorption capacities were 198.24 mg g-1 (Congo Red) and 192.51 mg g-1 (Titan Yellow), respectively. Based on its desorption performance, the material had good recyclability. Therefore, these studies could be used in wastewater treatment. Hopefully, the proposed magnetic composites will inspire more scholars to investigate solutions to the problem of contaminated water resources.
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Affiliation(s)
- Lishuang Hu
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China.
| | - Chunyu Guang
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
| | - Yang Liu
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
| | - Zengqiang Su
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
| | - Shida Gong
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
| | - Yajing Yao
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
| | - Yanping Wang
- China Ordnance Explosive Engineering and Safety Technology Research Institute, Beijing, 100053, China.
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78
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Carneiro MFH, Machado ART, Antunes LMG, Souza TE, Freitas VA, Oliveira LCA, Rodrigues JL, Pereira MC, Barbosa F. Gold-Coated Superparamagnetic Iron Oxide Nanoparticles Attenuate Collagen-Induced Arthritis after Magnetic Targeting. Biol Trace Elem Res 2020; 194:502-513. [PMID: 31313244 DOI: 10.1007/s12011-019-01799-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 06/24/2019] [Indexed: 01/15/2023]
Abstract
The aim of the study was to evaluate if gold-coated superparamagnetic iron oxide nanoparticles (AuSPION) magnetic-targeted to the arthritic articulation of collagen induced arthritis (CIA) rats are able to ameliorate rheumatoid arthritis without producing significant biological adverse effects in comparison to colloidal Au nanoparticles (AuC) and metotrexate (MTX). Male Wistar rats were divided into control; arthritic; AuSPION (150 μg kg-1); AuC (150 μg kg-1) and MTX (2.5 μg kg-1). Treatments were administered thrice every other day by the intraperitoneal route 15 min after all groups had a neodymium magnet coupled to the right ankle joint (kept for 1 h). Paw edema and body weight were measured weekly. Joint sections were evaluated by Haematoxylin & Eosin and immunohistochemistry (TNF-α, IL-1β). Biomarkers of oxidative stress were used to evaluate toxicity. Among the evaluated treatments, AuSPION led to significant clinical improvements (decreased edema and infiltration by leukocytes as well as less positively immunostained cells for both TNF-α and IL-1β in synovium) accompanied by a lack of toxicity as indicated by redox state and genotoxicity assays. Our results clearly indicate that the magnetic targeting of AuSPION suppresses joint edema and inflammation, cytokine expression as well as the redox imbalance, thereby contributing to an amelioration of arthritis severity in CIA rats. The results demonstrate for the first time the potentiality of AuSPION administration under a magnetic field as an attractive alternative for future treatments of rheumatic diseases.
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Affiliation(s)
| | - Ana Rita T Machado
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Lusânia M G Antunes
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Talita E Souza
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG,, Brazil
| | - Victor A Freitas
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG,, Brazil
| | - Luiz C A Oliveira
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG,, Brazil
| | - Jairo L Rodrigues
- Instituto de Ciência, Engenharia e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Teófilo Otoni, MG,, Brazil
| | - Marcio C Pereira
- Instituto de Ciência, Engenharia e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Teófilo Otoni, MG,, Brazil
| | - Fernando Barbosa
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
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79
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Liu H, Chen M, Wei D, Zhang H, Peng J, Liu G. A novel visible light controllable adsorption-desorption system with a magnetic recyclable adsorbent. Sci Total Environ 2020; 707:136025. [PMID: 31869606 DOI: 10.1016/j.scitotenv.2019.136025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/24/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
Convenient and energy-efficient desorption or regeneration processes are prerequisites for the development of an ideal adsorbent. For this work, a novel magnetic adsorbent (citric acid/Bi2O2CO3/Fe3O4) was controllably synthesized via a facile hydrothermal method. The as-prepared materials demonstrated the excellent adsorption of methylene blue (MB), where ~70% of the MB was absorbed within 10 min. Interestingly, the desorption process could be triggered by visible light irradiation, and 99% of the absorbed MB was released into solution within 4 h. Further, the magnetic materials could be conveniently recovered using a magnet and regenerated via a model hydrothermal process. Even after two regeneration cycles, approximately 60% adsorption and 63% desorption abilities were retained, which suggested strong potential for the recyclability of these materials.
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Affiliation(s)
- Haijin Liu
- School of Environmental Science, Henan Normal University, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China.
| | - Min Chen
- School of Environmental Science, Henan Normal University, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Dandan Wei
- School of Environmental Science, Henan Normal University, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China; Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Hui Zhang
- School of Environmental Science, Henan Normal University, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Jianbiao Peng
- School of Environmental Science, Henan Normal University, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Guoguang Liu
- Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
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80
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Nyqvist D, Durif C, Johnsen MG, De Jong K, Forland TN, Sivle LD. Electric and magnetic senses in marine animals, and potential behavioral effects of electromagnetic surveys. Mar Environ Res 2020; 155:104888. [PMID: 32072990 DOI: 10.1016/j.marenvres.2020.104888] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/16/2020] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
Electromagnetic surveys generate electromagnetic fields to map petroleum deposits under the seabed with unknown consequences for marine animals. The electric and magnetic fields induced by electromagnetic surveys can be detected by many marine animals, and the generated fields may potentially affect the behavior of perceptive animals. Animals using magnetic cues for migration or local orientation, especially during a restricted time-window, risk being affected by electromagnetic surveys. In electrosensitive animals, anthropogenic electric fields could disrupt a range of behaviors. The lack of studies on effects of the electromagnetic fields induced by electromagnetic surveys on the behavior of magneto- and electrosensitive animals is a reason for concern. Here, we review the use of electric and magnetic fields among marine animals, present data on survey generated and natural electromagnetic fields, and discuss potential effects of electromagnetic surveys on the behavior of marine animals.
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Affiliation(s)
- Daniel Nyqvist
- Institute of Marine Research Bergen, Nordnesgaten 50, 5005, Bergen, Norway.
| | - Caroline Durif
- Institute of Marine Research, Austevoll Research Station, Sauganeset 16, 5392, Storebø, Norway
| | | | - Karen De Jong
- Institute of Marine Research Bergen, Nordnesgaten 50, 5005, Bergen, Norway
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81
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Laumann ASL, Britos CN, Cappa VA, Rivero CW, Trelles JA. Biotransformation of cladribine by a magnetic immobilizated biocatalyst of Lactobacillus animalis. Biotechnol Lett 2020; 42:1229-36. [PMID: 32107669 DOI: 10.1007/s10529-020-02845-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 02/19/2020] [Indexed: 10/24/2022]
Abstract
A stable biocatalyst with magnetic properties based on immobilized Lactobacillus animalis ATCC 35,046 to obtain 2-chloroadenine-2'-deoxyriboside, known as cladribine, is reported for the first time. This nucleoside analogue is an antitumor agent used in the treatment of a wide variety of types of leukemia. In this study, an eco-compatible and alternative bioprocess to obtain cladribine was developed. Product conversion was close to 90% at 2 h in optimized nonconventional reaction media. The microscale biosynthesis of the compound of interest afforded a total productivity close to 370 mg/L/h in the presence of DMSO, and it was stable at least for 30 days in storage conditions.
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82
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Yang G, Gao Q, Yang S, Yin S, Cai X, Yu X, Zhang S, Fang Y. Strong adsorption of tetracycline hydrochloride on magnetic carbon-coated cobalt oxide nanoparticles. Chemosphere 2020; 239:124831. [PMID: 31526986 DOI: 10.1016/j.chemosphere.2019.124831] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 09/05/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
The overuse of antibiotics, including tetracycline hydrochloride (TC), seriously threatens human health and ecosystems. In this work, magnetic carbon-coated cobalt oxide nanoparticles (CoO@C) were prepared by one-step annealing method and used as an adsorbent for efficient removal of TC from aqueous solution. The characteristic of the materials was studied by SEM, TEM, and XRD, revealing CoO nanoparticles (≤10 nm) were coated by carbon layer. Several influencial parameters, such as annealing temperature and pH on adsorption of TC, were explored, and found that the maximum adsorption capacity of CoO@C on TC reached as high as 769.43 mg g-1. Furthermore, CoO@C displayed excellent stability and reusability. After four repeated use of the adsorbent, the adsorption capacity still remained at 90% of the initial capacity. The pseudo-second order model and Temkin model proved that it was an exothermic chemical adsorption process. Furthermore, after analysis of FT-IR, Zeta-potential, XPS, the positive charge on the surface of CoO@C forms a strong electrostatic interaction with TC, and in addition, a surface bond is formed between the adsorbent and the TC molecule. This work provides a novel and efficient adsorbent for the purification of TC-containing wastewater.
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Affiliation(s)
- Guanrong Yang
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China
| | - Qiongzhi Gao
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China
| | - Siyuan Yang
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China
| | - Shiheng Yin
- Analytical and Testing Center, South China University of Technology, Guangzhou, 510640, PR China
| | - Xin Cai
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China
| | - Xiaoyuan Yu
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China
| | - Shengsen Zhang
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China.
| | - Yueping Fang
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510643, China
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83
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Domac BH, AlKhatib S, Zirhli O, Akdogan NG, Öçal Dirican ŞC, Bulut G, Akdogan O. Effects of PEGylated Fe-Fe 3O 4 core-shell nanoparticles on NIH3T3 and A549 cell lines. Heliyon 2020; 6:e03124. [PMID: 31909281 DOI: 10.1016/j.heliyon.2019.e03124] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 11/01/2019] [Accepted: 12/23/2019] [Indexed: 01/02/2023] Open
Abstract
Magnetic nanoparticles are key components in many fields of science and industry. Especially in cancer diagnosis and therapy, they are involved in targeted drug delivery and hyperthermia applications due to their ability to be controlled remotely. In this study, a PEG-coated Fe/Fe3O4 core-shell nanoparticle with an average size of 20 nm and 13 nm and high room temperature coercivity (350 Oe) has been successfully synthesized. These nanoparticles were further tested for their effect on cellular toxicity (IC50) and proliferation by WST assay. In addition, their potential as anti-cancer agents were assessed using scratch assay in NIH3T3 mouse embryonic fibroblast and A549 non-small cell lung cancer cell lines. In previous reports, the IC50 values of the magnetite nanoparticles are reported at concentrations of 100 μg/ml and higher. In this study, IC50 value is observed to be at 1 μg/ml, which is significantly lower when compared to similar studies. In scratch assay, the Fe/Fe3O4 core-shell nanoparticle showed a higher inhibitory potential on cell motility in A549 lung cancer cells in comparison to the NIH3T3 cells mouse embryonic fibroblasts. This could be due to the accelerated release of free Fe ion from the Fe core, resulting in cell death. Consequently, data obtained from this study suggest that the synthesized nanoparticles can be a potential drug candidate with anti-cancer activity for chemotherapeutic treatment.
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84
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Zhao J, Liang G, Zhang X, Cai X, Li R, Xie X, Wang Z. Coating magnetic biochar with humic acid for high efficient removal of fluoroquinolone antibiotics in water. Sci Total Environ 2019; 688:1205-1215. [PMID: 31726551 DOI: 10.1016/j.scitotenv.2019.06.287] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/12/2019] [Accepted: 06/19/2019] [Indexed: 06/10/2023]
Abstract
As antibiotics are widely consumed, fluoroquinolones (FQs) behave to have huge hidden danger to human health. Various agricultural residues have potential to produce biochar rich in porous structure for adsorption of contaminants. In this study, potato leaves and stems were pyrolyzed at 500 °C under anoxic condition for biochar (BC) preparation. At the same conditions, magnetic biochar (MBC) and humic acid (HA) coated magnetic biochar (HAB) were also prepared. In particular, characterizations of HAB showed the extensive coating of HA on MBC surface and introducing more oxygen-containing groups, which may promote the adsorption capacity of biochar. Three typical FQs (ciprofloxacin (CIP), norfloxacin (NOR) and enrofloxacin (ENR)) were used as target contaminants to further investigate the adsorption property of HAB. Compared with BC and MBC, novel adsorbent HAB due to introduction of HA exhibited better FQs adsorption ability, and its maximum adsorption capacity for CIP, NOR and ENR were 1.80, 1.67 and 1.70 times higher than those of MBC and were 3.40, 2.88, 2.96 times higher than those of raw BC, respectively. Pseudo-second-order kinetic model and Langmuir isotherm model could describe the process of FQs adsorbed on HAB more appropriately, and thermodynamic results illustrated that the sorption process was spontaneous and endothermic. In addition, FQs adsorption by HAB was increased with initial solution pH from 3.0 to 10.0, while it was slightly decreased with ionic strength rising (0.001-0.1 M CaCl2). Combined with FTIR results, high FQs removal efficiency could be attributed to electrostatic, hydrophobic, H-bond and π-π EDA interactions.
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Affiliation(s)
- Jing Zhao
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Guiwei Liang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xiaoli Zhang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xuewei Cai
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Ruining Li
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xiaoyun Xie
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhaowei Wang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
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85
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Mouedhen I, Coudert L, Blais JF, Mercier G. Prediction of physical separation of metals from soils contaminated with municipal solid waste ashes and metallurgical residues. Waste Manag 2019; 93:138-152. [PMID: 31235050 DOI: 10.1016/j.wasman.2019.05.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 04/13/2019] [Accepted: 05/20/2019] [Indexed: 06/09/2023]
Abstract
Environmental legislation is forcing industrialized countries to rehabilitate contaminated lands. Expensive solutions are available to treat soils contaminated by metals (e.g., solidification, stabilization, and landfilling). Physical remediation techniques, which are less expensive, are able to efficiently separate metals from contaminated soils under specific physical conditions. In the current study, densimetric and mineralogical characterization of fractions of soil between 0.25 and 4 mm contaminated by municipal solid waste (MSW) ashes and metallurgical waste was performed. This characterization confirmed the usefulness of the jig and wet shaking table for separating the metal contaminants from the soil. Mineralogical characterization allowed the prediction of treatment efficiencies and potential limits. The jig performance was optimized based on densimetric characterization. Water washing coupled with ferrous material extraction using magnetic separation, and, attrition scrubbing coupled with the jig and wet shaking table, led to a removal yield varying from 42.1% to 83.4% for Ba, Cu, Pb, Sn, and Zn from the fraction of soil >0.25 mm contaminated by MSW ashes. The recovered treated mass varied from 57.1% to 73.4% (by weight). For the fraction of soil >0.25 mm contaminated with metallurgical residues, Cu and Zn removal yields were higher than 57.5%. The recovered treated mass from this soil fraction corresponded to 64.8% (by weight). Depending on the level and leachability of contaminants, the soil fractions <0.25 mm were recommended for appropriate treatments (solidification or stabilization) or for safe disposal via landfills.
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Affiliation(s)
- Ikbel Mouedhen
- Institut National de la Recherche Scientifique (Centre Eau Terre Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada.
| | - Lucie Coudert
- Institut de recherche en mines et en environnement (Unité de recherche et de service en technologie minérale), Université du Québec en Abitibi-Témiscamingue, 445 boulevard de l'Université, Rouyn-Noranda, QC J9X 5E4, Canada.
| | - Jean-François Blais
- Institut National de la Recherche Scientifique (Centre Eau Terre Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada.
| | - Guy Mercier
- Institut National de la Recherche Scientifique (Centre Eau Terre Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada.
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86
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Rasolzadeh F, Hashemi P. Magnetic fiber headspace solid-phase microextraction coupled to GC-MS for the extraction and quantitation of polycyclic aromatic hydrocarbons. Mikrochim Acta 2019; 186:432. [PMID: 31197476 DOI: 10.1007/s00604-019-3482-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 05/05/2019] [Indexed: 02/06/2023]
Abstract
A technique was developed for magnetic fiber headspace-solid phase microextraction (MF-HS-SPME) of polycyclic aromatic hydrocarbons (PAHs). The efficiency of the extraction of a steel SPME fiber coated with an aminoethyl-functionalized SBA-15 (Santa Barbara Amorphous 15; a nanoporous sorbent) is substantially improved after its magnetization during HS-SPME. The effects of magnetic field strength, extraction temperature, extraction time, moisture content of the sample, desorption time and desorption temperature were optimized using a simplex method. The application of a moderately strong magnetic field to the fiber results in up to 135% increase in the extraction efficiency and wider linear dynamic ranges. The PAHs (specifically naphthalene, acenaphthene, fluorene, anthracene, phenanthrene, fluoranthene and pyrene) were then quantified by GC-MS analysis. Comparison of an electromagnet and a permanent magnet indicated the superior effect of the permanent magnet for the target analytes due to the Ohmic heating of the magnetic coil and its negative effect on the extraction of some of the PAHs. The limits of detections of the PAHs are between 0.17 to 0.57 ng g-1 by using the electromagnet, and between 0.10 and 0.32 ng g-1 for the permanent magnet. Relative standard deviations of 2.9 to 7.6% were obtained for six replicated analyses of the analytes. The method was applied to some polluted soil samples, and satisfactory results were obtained. Graphical abstract Schematic representation of the designed magnetic fiber headspace solid-phase microextraction (MF-HS-SPME) system using (a) an electromagnet, (b) a pair of permanent disc magnets.
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Affiliation(s)
- Fahimeh Rasolzadeh
- Department of Chemistry, Faculty of Science, Lorestan University, Khoramabad, 6815144316, Iran
| | - Payman Hashemi
- Department of Chemistry, Faculty of Science, Lorestan University, Khoramabad, 6815144316, Iran.
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87
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Jiang C, Wang X, Qin D, Da W, Hou B, Hao C, Wu J. Construction of magnetic lignin-based adsorbent and its adsorption properties for dyes. J Hazard Mater 2019; 369:50-61. [PMID: 30772687 DOI: 10.1016/j.jhazmat.2019.02.021] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/22/2019] [Accepted: 02/08/2019] [Indexed: 05/22/2023]
Abstract
The magnetic lignin-based adsorbent (Fe3O4/C-ACLS) has been successfully prepared and applied to adsorbing azo dyes Congo red, Titan yellow and Eriochrome blue black R. The samples were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), X-ray powder diffraction (XRD), vibration sample magnetometer (VSM), Raman spectroscopy and elemental analysis. In the process of adsorption, five kinds of influencing factors and recycling regeneration were discussed, and the adsorption mechanisms such as kinetics, isotherm, thermodynamics were explored. The results show that Fe3O4/C-ACLS can remove 98%, 92% and 99% of Congo red, Titan yellow and Eriochrome blue black R, respectively. Under the same conditions, the removal rate was 87%, 84% and 88% after 5 times adsorption cycle, respectively. Pseudo-first-order, pseudo-second-order kinetics, Elovich model and intraparticle diffusion model were studied, and the results show that the adsorption process conforms to pseudo-second-order kinetics model, and the diffusion rate is controlled by many steps. The results of isotherm model and thermodynamics show that the adsorption process is consistent with Langmuir model and is mainly a spontaneous chemical endothermic process of monolayer.
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Affiliation(s)
- Chenglong Jiang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Xiaohong Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
| | - Demeng Qin
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Wenxin Da
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Bingxia Hou
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Chen Hao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
| | - Jingbo Wu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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88
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Banerjee A, Tolla AS, Stjepanovic S, Sevilla MD, Goodsell JL, Angerhofer A, Brennessel WW, Loloee R, Chavez FA. Structural, Spectroscopic, Electrochemical, and Magnetic Properties for Manganese(II) Triazamacrocyclic Complexes. Inorganica Chim Acta 2019; 486:546-555. [PMID: 33981118 PMCID: PMC8112617 DOI: 10.1016/j.ica.2018.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the synthesis of [Mn(tacud)2](OTf)2 (1) (tacud = 1,4,8-triazacycloundecane), [Mn(tacd)2](OTf)2 (2) (tacd = 1,4,7-triazacyclodecane), and [Mn(tacn)2](OTf)2 (3) (tacn = 1,4,7-triazacyclononane). Electrochemical measurements on the MnIII/II redox couple show that complex 1 has the largest anodic potential of the set (E 1/2 = 1.16 V vs NHE, ΔE p = 106 mV) compared to 2 (E 1/2 = 0.95 V, ΔE p = 108 mV) and 3 (E 1/2 = 0.93 V, ΔE p = 96 mV). This is due to the fact that 1 has the fewest 5-membered chelate rings and thus is least stabilized. Magnetic studies of 1-3 revealed that all complexes remain high spin throughout the temperature range investigated (2 - 300 K). X-band EPR investigations in methanol glass indicated that the manganese(II) centers for 2 and 3 resided in a more distorted octahedral geometric configuration compared to 1. To ease spectral interpretation and extract ZFS parameters, we performed high-frequency high-field EPR (HFEPR) at frequencies above 200 GHz and a field of 7.5 T. Simulation of the spectral data yielded g = 2.0013 and D = -0.031 cm-1 for 1, g = 2.0008, D = -0.0824 cm-1, |E/D| = 0.12 for 2, and g = 2.00028, D = -0.0884 cm-1 for 3. These results are consistent with 3 possessing the most distorted geometry. Calculations (PBE0/6-31G(d)) were performed on 1-3. Results show that 1 has the largest HOMO-LUMO gap energy (6.37 eV) compared to 2 (6.12 eV) and 3 (6.26 eV). Complex 1 also has the lowest HOMO energies indicating higher stability.
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Affiliation(s)
- Atanu Banerjee
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
| | - Azam S Tolla
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
| | | | - Michael D Sevilla
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
| | - Justin L Goodsell
- Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
| | | | | | - Reza Loloee
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-1322, USA
| | - Ferman A Chavez
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
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89
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Wang P, Peters MC, Kattner UR, Choudhary K, Olson GB. Thermodynamic analysis of the topologically close packed σ phase in the Co-Cr system. Intermetallics (Barking) 2019; 105:10.1016/j.intermet.2018.11.004. [PMID: 31579354 PMCID: PMC6774197 DOI: 10.1016/j.intermet.2018.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Density functional theory (DFT) calculations show that it is essential to consider the magnetic contribution to the total energy for the end-members of the σ phase. A more straightforward method to use the DFT results in a CALPHAD (Calculation of phase diagrams) description has been applied in the present work. It was found that only the results from DFT calculations considering spin-polarization are necessary to obtain a reliable description of the σ phase. The benefits of this method are: the DFT calculation work can be reduced and the CALPHAD description of the magnetic contribution is more reliable. A revised thermodynamic description of the Co-Cr system is presented which gives improved agreement with experimental phase boundary data for the σ phase.
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Affiliation(s)
- Peisheng Wang
- Center for Hierarchical Materials Design (CHiMaD), Northwestern University, 2205 Tech Drive, Evanston, IL 60208, USA
- Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Dr., MS 8555, Gaithersburg, MD 20899, USA
| | - Matthew C. Peters
- Center for Hierarchical Materials Design (CHiMaD), Northwestern University, 2205 Tech Drive, Evanston, IL 60208, USA
| | - Ursula R. Kattner
- Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Dr., MS 8555, Gaithersburg, MD 20899, USA
| | - Kamal Choudhary
- Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Dr., MS 8555, Gaithersburg, MD 20899, USA
| | - Gregory B. Olson
- Center for Hierarchical Materials Design (CHiMaD), Northwestern University, 2205 Tech Drive, Evanston, IL 60208, USA
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90
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Wang J, Zhang Q, Shao X, Ma J, Tian G. Properties of magnetic carbon nanomaterials and application in removal organic dyes. Chemosphere 2018; 207:377-384. [PMID: 29803887 DOI: 10.1016/j.chemosphere.2018.05.109] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/16/2018] [Accepted: 05/18/2018] [Indexed: 05/09/2023]
Abstract
Magnetic carbon nanomaterials were prepared facilely by one step hydrothermal synthesis method using biologically regenerated glucose as carbon sources and ferric ammonium citrate as iron sources. As-synthesized nanomaterials were characterized by means of SEM, TEM, XRD, N2 adsorption-desorption, VSM and XPS etc. techniques. Results show as-prepared magnetic nanomaterials are sphere particles with aggregation state and magnetic α-Fe particles are enclosed by carbon matrixes. With increase of calcination temperature, the degrees of the sample aggregation decrease, whereas the average particle sizes, BET specific surface areas and saturation magnetizations increase. The carbon with graphite structure has higher adsorption efficiency than that of amorphous carbon for organic dye rhodamine B in water. Whereas the iron with amorphous structure shows higher photocatalytic activity than that of the iron with crystalline structure for the degradation of rhodamine B. And rhodamine B in water can almost be degraded completely through the combination of adsorption and photocatalysis.
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Affiliation(s)
- Junhong Wang
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China.
| | - Qiang Zhang
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China
| | - Xianzhao Shao
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China
| | - Jianqi Ma
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China
| | - Guanghui Tian
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environment Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China
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91
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Goldberg O, Greenfeld I, Wagner HD. Composite Reinforcement by Magnetic Control of Fiber Density and Orientation. ACS Appl Mater Interfaces 2018; 10:16802-16811. [PMID: 29694781 DOI: 10.1021/acsami.8b02964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The flexural rigidity of cylindrical specimens, composed of epoxy reinforced by short, magnetized glass fibers, was enhanced using weak magnetic fields (<100 mT). By spatially controlling the magnitude and direction of the field, and thereby the torques and forces acting locally on the fibers, the orientation and concentration of the fillers in the matrix could be tuned prior to curing. Unidirectional alignment of the fibers, achieved using an air-core solenoid, improved the contribution of the fibers to the flexure modulus by a factor of 3. When a ring-shaped permanent magnet was utilized, the glass fibers were migrated preferentially near the rod boundary, and as a result, the contribution of the fibers to the flexure modulus doubled. The fiber length, density, and orientation distributions were extracted by μCT image analysis, allowing comparison of the experimental flexure modulus to a modified rule of mixtures prediction. The ability to magnetically control the fiber distribution in reinforced composites demonstrated in this study may be applied in the fabrication of complex micro- and macroscale structures with spatially variable anisotropy, allowing features such as crack diversion, strengthening of highly loaded regions, as well as economic management of materials and weight.
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Affiliation(s)
- Omri Goldberg
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Israel Greenfeld
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - H Daniel Wagner
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
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92
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Liu ZL, Wu X, Shao Y, Qi J, Cao Y, Huang L, Liu C, Wang JO, Zheng Q, Zhu ZL, Ibrahim K, Wang YL, Gao HJ. Epitaxially grown monolayer VSe 2: an air-stable magnetic two-dimensional material with low work function at edges. Sci Bull (Beijing) 2018; 63:419-425. [PMID: 36658936 DOI: 10.1016/j.scib.2018.03.008] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 03/07/2018] [Accepted: 03/09/2018] [Indexed: 01/21/2023]
Abstract
Recent experimental breakthroughs open up new opportunities for magnetism in few-atomic-layer two-dimensional (2D) materials, which makes fabrication of new magnetic 2D materials a fascinating issue. Here, we report the growth of monolayer VSe2 by molecular beam epitaxy (MBE) method. Electronic properties measurements by scanning tunneling spectroscopy (STS) method revealed that the as-grown monolayer VSe2 has magnetic characteristic peaks in its electronic density of states and a lower work-function at its edges. Moreover, air exposure experiments show air-stability of the monolayer VSe2. This high-quality monolayer VSe2, a very air-inert 2D material with magnetism and low edge work function, is promising for applications in developing next-generation low power-consumption, high efficiency spintronic devices and new electrocatalysts.
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Affiliation(s)
- Zhong-Liu Liu
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Xu Wu
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Yan Shao
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Jing Qi
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Yun Cao
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Huang
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Chen Liu
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jia-Ou Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qi Zheng
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhi-Li Zhu
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Kurash Ibrahim
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Ye-Liang Wang
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China; CAS Center for Excellence in Topological Quantum Computation, Beijing 100049, China.
| | - Hong-Jun Gao
- Institute of Physics and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China; CAS Center for Excellence in Topological Quantum Computation, Beijing 100049, China.
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93
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Sheng W, Xi Y, Zhang L, Ye T, Zhao X. Enhanced activity and stability of papain by covalent immobilization on porous magnetic nanoparticles. Int J Biol Macromol 2018; 114:143-148. [PMID: 29567500 DOI: 10.1016/j.ijbiomac.2018.03.088] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/16/2018] [Accepted: 03/18/2018] [Indexed: 12/11/2022]
Abstract
Papain enzyme was successfully immobilized by covalent bonding onto biocompatible Fe3O4/SF nanoparticles, which were prepared with the soft template of silk fibroin (SF). The optimized immobilization condition is pH6.0, hydrolysis time of 60min, and an enzyme/support ratio of 10.0mg/g. Compared with free papain, the immobilized papain exhibits a high effective activity, broader working pH and temperature. This immobilized papain can be separated from the solution by the external magnetic field for cyclic utilization, and 70% of initial activity was retained after eight consecutive operations while completely loss of proteolytic activity for the free papain. Furthermore, the immobilized papain maintained 85% of their initial activity after being stored for 28days. Kinetic parameters, maximum reaction rate (Vmax) and Michaelis constant (Km) of immobilized papain, were determined as 4.95mg/l·min and 0.23mg/ml, larger than its free counterpart. All the results above indicated that the immobilized papain onto magnetic Fe3O4/SF nanoparticles would have potential industrial and medical applications.
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Affiliation(s)
- Weiqin Sheng
- Laboratory for Nanoelectronics and Nano Devices, School of Electronic Information, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Yinyin Xi
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Luting Zhang
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Ting Ye
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Xueqin Zhao
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China.
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94
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Singh RK, Kumar S, Aman AK, Karim SM, Kumar S, Kar M. Study on physical properties of Ayurvedic nanocrystalline Tamra Bhasma by employing modern scientific tools. J Ayurveda Integr Med 2017; 10:88-93. [PMID: 29249635 PMCID: PMC6598801 DOI: 10.1016/j.jaim.2017.06.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 06/25/2017] [Indexed: 11/22/2022] Open
Abstract
Background Tamra Bhasma is derived from metallic copper that is recommended for different ailments of liver and spleen, dropsy, abdominal pain, heart disease, colitis, tumors, anemia, loss of appetite, tuberculosis, as well as eye problems. Objectives The knowledge of crystallite size and active ingredients in Bhasma materials is limited restricting its use as nanomedicine in the modern era. Also, the 2015 Nobel prize in medicine has motivated many researchers towards traditional medicines. Therefore, the different chemical and physical properties of prepared Tamra Bhasma has been studied by modern experimental tools (XRD, VSM, SEM, FTIR and PL spectrometer) and the preliminary testing of Tamra Bhasma nanoparticles was examined on bacteria. Materials and methods Bhasma is prepared by metals and minerals using three step procedures e.g. Shodhana, Bhavana and Marana. In the present work, for the preparation of Tamra Bhasma, pulverized copper wire was used and prepared by the principle of Puta (incineration) in an Electrical Muffle Furnace (EMF). Results X-ray diffraction analysis and scanning electron microscopy results revealed that the crystallite size of Bhasma powder was less than 100 nm and nanocrystallites of aglomerated size in micrometer. Magnetometer measurement supports its medicinal value. Photoluminescence (PL) properties of nanocrystalline Bhasma powder was investigated in UV-NIR region and shows luminescence in visible region. The antimicrobial study of Tamra Bhasma shows effectiveness on bacteria and, may be useful to control the bacterial infection disease. Conclusion Scientific data obtained using modern scientific tools and evidence would support in utilizing the ancient Indian wisdom of Ayurveda for the development of newer drugs as a modern nanomedicine and in other possible technological applications.
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Affiliation(s)
- Rakesh Kr Singh
- Aryabhatta Centre for Nanoscience & Nanotechnology, Aryabhatta Knowledge University, Patna, 800001, Bihar, India.
| | - Sanjay Kumar
- Aryabhatta Centre for Nanoscience & Nanotechnology, Aryabhatta Knowledge University, Patna, 800001, Bihar, India
| | - Abhay Kr Aman
- Aryabhatta Centre for Nanoscience & Nanotechnology, Aryabhatta Knowledge University, Patna, 800001, Bihar, India
| | - S M Karim
- Aryabhatta Knowledge University, Patna, 800001, Bihar, India
| | - Sunil Kumar
- Department of Physics, Indian Institute of Technology (IIT) Patna, Bihta, 801103, India
| | - Manoranjan Kar
- Department of Physics, Indian Institute of Technology (IIT) Patna, Bihta, 801103, India
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Sanvito S, Oses C, Xue J, Tiwari A, Zic M, Archer T, Tozman P, Venkatesan M, Coey M, Curtarolo S. Accelerated discovery of new magnets in the Heusler alloy family. Sci Adv 2017; 3:e1602241. [PMID: 28439545 PMCID: PMC5392031 DOI: 10.1126/sciadv.1602241] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 02/14/2017] [Indexed: 05/10/2023]
Abstract
Magnetic materials underpin modern technologies, ranging from data storage to energy conversion to contactless sensing. However, the development of a new high-performance magnet is a long and often unpredictable process, and only about two dozen magnets are featured in mainstream applications. We describe a systematic pathway to the design of novel magnetic materials, which demonstrates a high throughput and discovery speed. On the basis of an extensive electronic structure library of Heusler alloys containing 236,115 prototypical compounds, we filtered those displaying magnetic order and established whether they can be fabricated at thermodynamic equilibrium. Specifically, we carried out a full stability analysis of intermetallic Heusler alloys made only of transition metals. Among the possible 36,540 prototypes, 248 were thermodynamically stable but only 20 were magnetic. The magnetic ordering temperature, TC, was estimated by a regression calibrated on the experimental TC of about 60 known compounds. As a final validation, we attempted the synthesis of a few of the predicted compounds and produced two new magnets: Co2MnTi, which displays a remarkably high TC in perfect agreement with the predictions, and Mn2PtPd, which is an antiferromagnet. Our work paves the way for large-scale design of novel magnetic materials at potentially high speed.
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Affiliation(s)
- Stefano Sanvito
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
- Center for Materials Genomics, Duke University, Durham, NC 27708, USA
| | - Corey Oses
- Center for Materials Genomics, Duke University, Durham, NC 27708, USA
- Departments of Mechanical Engineering and Materials Science, Physics, and Chemistry, Duke University, Durham, NC 27708, USA
| | - Junkai Xue
- Center for Materials Genomics, Duke University, Durham, NC 27708, USA
- Departments of Mechanical Engineering and Materials Science, Physics, and Chemistry, Duke University, Durham, NC 27708, USA
| | - Anurag Tiwari
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Mario Zic
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Thomas Archer
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Pelin Tozman
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Munuswamy Venkatesan
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Michael Coey
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Stefano Curtarolo
- Center for Materials Genomics, Duke University, Durham, NC 27708, USA
- Departments of Mechanical Engineering and Materials Science, Physics, and Chemistry, Duke University, Durham, NC 27708, USA
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96
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Schermers B, van der Hage JA, Loo CE, Vrancken Peeters MTFD, Winter-Warnars HAO, van Duijnhoven F, Ten Haken B, Muller SH, Ruers TJM. Feasibility of magnetic marker localisation for non-palpable breast cancer. Breast 2017; 33:50-56. [PMID: 28282587 DOI: 10.1016/j.breast.2017.03.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/01/2017] [Accepted: 03/02/2017] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES Accurate tumour localisation is essential for breast-conserving surgery of non-palpable tumours. Current localisation technologies are associated with disadvantages such as logistical challenges and migration issues (wire guided localisation) or legislative complexities and high administrative burden (radioactive localisation). We present MAgnetic MArker LOCalisation (MaMaLoc), a novel technology that aims to overcome these disadvantages using a magnetic marker and a magnetic detection probe. This feasibility study reports on the first experience with this new technology for breast cancer localisation. MATERIALS AND METHODS Fifteen patients with unifocal, non-palpable breast cancer were recruited. They received concurrent placement of the magnetic marker in addition to a radioactive iodine seed, which is standard of care in our clinic. In a subset of five patients, migration of the magnetic marker was studied. During surgery, a magnetic probe and gammaprobe were alternately used to localise the markers and guide surgery. The primary outcome parameter was successful transcutaneous identification of the magnetic marker. Additionally, data on radiologist and surgeon satisfaction were collected. RESULTS Magnetic marker placement was successful in all cases. Radiologists could easily adapt to the technology in the clinical workflow. Migration of the magnetic marker was negligible. The primary endpoint of the study was met with an identification rate of 100%. Both radiologists and surgeons reflected that the technology was intuitive to use and that it was comparable to radioactive iodine seed localisation. CONCLUSION Magnetic marker localisation for non-palpable breast cancer is feasible and safe, and may be a viable non-radioactive alternative to current localisation technologies.
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Affiliation(s)
- B Schermers
- The Netherlands Cancer Institute, Department of Surgery, The Netherlands; University of Twente, MIRA Institute, The Netherlands.
| | - J A van der Hage
- The Netherlands Cancer Institute, Department of Surgery, The Netherlands
| | - C E Loo
- The Netherlands Cancer Institute, Department of Radiology, Division of Diagnostic Oncology, The Netherlands
| | | | - H A O Winter-Warnars
- The Netherlands Cancer Institute, Department of Radiology, Division of Diagnostic Oncology, The Netherlands
| | - F van Duijnhoven
- The Netherlands Cancer Institute, Department of Surgery, The Netherlands
| | - B Ten Haken
- University of Twente, MIRA Institute, The Netherlands
| | - S H Muller
- The Netherlands Cancer Institute, Department of Clinical Physics, The Netherlands
| | - T J M Ruers
- The Netherlands Cancer Institute, Department of Surgery, The Netherlands; University of Twente, MIRA Institute, The Netherlands
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97
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Yao S, Li B, Jing M, Tang H, Wu X, Hou J, Shen X. Tunable Synthesis, Characterization and Magnetic Properties of Core–Shell Cu@M (M = Co or Ni) Nanowires. J Nanosci Nanotechnol 2017; 17:661-665. [PMID: 29630329 DOI: 10.1166/jnn.2017.11609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ultralong Cu@M (M = Co or Ni) nanowires (NWs) with core–shell structure were fabricated by a simple method by using the prepared Cu NWs as template. The crystal phases of Cu@M (M = Co or Ni) NWs were confirmed by X-ray diffraction (XRD). The morphology and microstructure of NWs were characterized by scanning electro microscopy (SEM) and transmission electro microscopy (TEM). Different diameters of Cu@M (M = Co or Ni) NWs varying from 120 to 550 nm with length about 10 μm were obtained via controlling the amounts of cobalt (nickel) nitrates in the reduction process. The magnetic properties of samples were measured using vibrating sample magnetometer (VSM). Results revealed that Cu NWs has a characteristic of paramagnetism after coating Co or Ni. The coercivity (H(c)) values of Cu@ Ni and Cu@Co NWs were 114.6 and 102.5 Oe, respectively. Possible formation mechanism for Cu@M (M = Co or Ni) NWs was preliminarily proposed.
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98
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Zhang N, Wei Q, Qin L, Chen D, Chen Z, Niu F, Wang J, Huanag Y. Crystal Structure, Magnetic and Optical Properties of Mn-Doped BiFeO₃ by Hydrothermal Synthesis. J Nanosci Nanotechnol 2017; 17:544-549. [PMID: 29629749 DOI: 10.1166/jnn.2017.12661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this paper, Mn doped BiFeO₃ were firstly synthesized by hydrothermal process. The influence of Mn doping on structural, optical and magnetic properties of BiFeO₃ was studied. The different amounts of Mn doping in BiFeO₃ were characterized by X-ray diffraction, Scanning Electron Microscope, Energy Dispersive X-ray Spectroscope, UV-Vis diffuse reflectance spectroscopy and magnetic measurements. The X-ray diffraction (XRD) patterns confirmed the formation of pure phase rhombohedral structure in BiFe(1−x) Mn (x) O₃ (x = 0.01, 0.03, 0.05, 0.07) samples. The morphologies and chemical compositions of as-prepared samples could be observed by Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscope (EDS). A relative large saturated magnetization (Ms) of 0.53 emu/g for x = 0.07 sample was obtained at room temperature, which is considered to be Mn ions doping. UV-Vis diffuse reflectance spectroscopy showed strong absorption of light in the range of 200–1000 nm, indicating the optical band gap in the visible region for these samples. This implied that BiFe(1−x) Mn(x)O₃ may be a potential photocatalyst for utilizing solar energy.
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99
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Grutter AJ, Vailionis A, Borchers JA, Kirby BJ, Flint CL, He C, Arenholz E, Suzuki Y. Interfacial Symmetry Control of Emergent Ferro magnetism at the Nanoscale. Nano Lett 2016; 16:5647-5651. [PMID: 27472285 DOI: 10.1021/acs.nanolett.6b02255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The emergence of complex new ground states at interfaces has been identified as one of the most promising routes to highly tunable nanoscale materials. Despite recent progress, isolating and controlling the underlying mechanisms behind these emergent properties remains among the most challenging materials physics problems to date. In particular, generating ferromagnetism localized at the interface of two nonferromagnetic materials is of fundamental and technological interest. Moreover, the ability to turn the ferromagnetism on and off would shed light on the origin of such emergent phenomena and is promising for spintronic applications. We demonstrate that ferromagnetism confined within one unit cell at the interface of CaRuO3 and CaMnO3 can be switched on and off by changing the symmetry of the oxygen octahedra connectivity at the boundary. Interfaces that are symmetry-matched across the boundary exhibit interfacial CaMnO3 ferromagnetism while the ferromagnetism at symmetry-mismatched interfaces is suppressed. We attribute the suppression of ferromagnetic order to a reduction in charge transfer at symmetry-mismatched interfaces, where frustrated bonding weakens the orbital overlap. Thus, interfacial symmetry is a new route to control emergent ferromagnetism in materials such as CaMnO3 that exhibit antiferromagnetism in bulk form.
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Affiliation(s)
- A J Grutter
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
| | - A Vailionis
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
| | - J A Borchers
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
| | - B J Kirby
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
| | - C L Flint
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
| | - C He
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
| | - E Arenholz
- Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Y Suzuki
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
- Department of Applied Physics, Stanford University , Stanford, California 94305, United States
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100
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Faucon A, Benhelli-Mokrani H, Fleury F, Dubreil L, Hulin P, Nedellec S, Doussineau T, Antoine R, Orlando T, Lascialfari A, Fresnais J, Lartigue L, Ishow E. Tuning the architectural integrity of high-performance magneto-fluorescent core-shell nanoassemblies in cancer cells. J Colloid Interface Sci 2016; 479:139-149. [PMID: 27388127 DOI: 10.1016/j.jcis.2016.06.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 06/24/2016] [Accepted: 06/27/2016] [Indexed: 01/21/2023]
Abstract
High-density nanoarchitectures, endowed with simultaneous fluorescence and contrast properties for MRI and TEM imaging, have been obtained using a simple self-assembling strategy based on supramolecular interactions between non-doped fluorescent organic nanoparticles (FON) and superparamagnetic nanoparticles. In this way, a high-payload core-shell structure FON@mag has been obtained, protecting the hydrophobic fluorophores from the surroundings as well as from emission quenching by the shell of magnetic nanoparticles. Compared to isolated nanoparticles, maghemite nanoparticles self-assembled as an external shell create large inhomogeneous magnetic field, which causes enhanced transverse relaxivity and exacerbated MRI contrast. The magnetic load of the resulting nanoassemblies is evaluated using magnetic sedimentation and more originally electrospray mass spectrometry. The role of the stabilizing agents (citrate versus polyacrylate anions) revealed to be crucial regarding the cohesion of the resulting high-performance magneto-fluorescent nanoassemblies, which questions their use after cell internalization as nanocarriers or imaging agents for reliable correlative light and electron microcopy.
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Affiliation(s)
- Adrien Faucon
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | | | - Fabrice Fleury
- UFIP-UMR CNRS 6204, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Laurence Dubreil
- Pan Ther-UMR 703, INRA-ONIRIS, Atlanpole-Chanterie, 44307 Nantes, France
| | - Philippe Hulin
- INSERM UMS 016-UMS CNRS 3556, 8 quai Moncousu, 44007 Nantes, France
| | - Steven Nedellec
- INSERM UMS 016-UMS CNRS 3556, 8 quai Moncousu, 44007 Nantes, France
| | - Tristan Doussineau
- Institut Lumière Matière-UMR CNRS 5306, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Rodolphe Antoine
- Institut Lumière Matière-UMR CNRS 5306, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Tomas Orlando
- Department of Physics, Università di Pavia, via Bassi, 27100 Pavia, Italy
| | - Alessandro Lascialfari
- Department of Physics, Università di Pavia, via Bassi, 27100 Pavia, Italy; Department of Physics, Università degli Studi di Milano and INSTM, via Celoria 16, 20133 Milano, Italy
| | - Jérôme Fresnais
- Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire PHENIX, 4 place Jussieu, 75005 Paris, France
| | - Lénaïc Lartigue
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Eléna Ishow
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France.
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