1
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Liu L, Yadav Schmid S, Feng Z, Li D, Droubay TC, Pauzauskie PJ, Schenter GK, De Yoreo JJ, Chun J, Nakouzi E. Effect of Solvent Composition on Non-DLVO Forces and Oriented Attachment of Zinc Oxide Nanoparticles. ACS NANO 2024. [PMID: 38888092 DOI: 10.1021/acsnano.4c01797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Oriented attachment (OA) occurs when nanoparticles in solution align their crystallographic axes prior to colliding and subsequently fuse into single crystals. Traditional colloidal theories such as DLVO provide a framework for evaluating OA but fail to capture key particle interactions due to the atomistic details of both the crystal structure and the interfacial solution structure. Using zinc oxide as a model system, we investigated the effect of the solvent on short-ranged and long-ranged particle interactions and the resulting OA mechanism. In situ TEM imaging showed that ZnO nanocrystals in toluene undergo long-range attraction comparable to 1kT at separations of 10 nm and 3kT near particle contact. These observations were rationalized by considering non-DLVO interactions, namely, dipole-dipole forces and torques between the polar ZnO nanocrystals. Langevin dynamics simulations showed stronger interactions in toluene compared to methanol solvents, consistent with the experimental results. Concurrently, we performed atomic force microscopy measurements using ZnO-coated probes for the short-ranged interaction. Our data are relevant to another type of non-DLVO interaction, namely, the repulsive solvation force. Specifically, the solvation force was stronger in water compared to ethanol and methanol, due to the stronger hydrogen bonding and denser packing of water molecules at the interface. Our results highlight the importance of non-DLVO forces in a general framework for understanding and predicting particle aggregation and attachment.
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Affiliation(s)
- Lili Liu
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Sakshi Yadav Schmid
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Zhaojie Feng
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Dongsheng Li
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Timothy C Droubay
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Peter J Pauzauskie
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Gregory K Schenter
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - James J De Yoreo
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Jaehun Chun
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Levich Institute and Department of Chemical Engineering, CUNY City College of New York, New York 10031, United States
| | - Elias Nakouzi
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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2
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Lu J, Xu C, Dose W, Dey S, Wang X, Wu Y, Li D, Ci L. Microstructures of layered Ni-rich cathodes for lithium-ion batteries. Chem Soc Rev 2024; 53:4707-4740. [PMID: 38536022 DOI: 10.1039/d3cs00741c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Millions of electric vehicles (EVs) on the road are powered by lithium-ion batteries (LIBs) based on nickel-rich layered oxide (NRLO) cathodes, and they suffer from a limited driving range and safety concerns. Increasing the Ni content is a key way to boost the energy densities of LIBs and alleviate the EV range anxiety, which are, however, compromised by the rapid performance fading. One unique challenge lies in the worsening of the microstructural stability with a rising Ni-content in the cathode. In this review, we focus on the latest advances in the understanding of NLRO microstructures, particularly the microstructural degradation mechanisms, state-of-the-art stabilization strategies, and advanced characterization methods. We first elaborate on the fundamental mechanisms underlying the microstructural failures of NRLOs, including anisotropic lattice evolution, microcracking, and surface degradation, as a result of which other degradation processes, such as electrolyte decomposition and transition metal dissolution, can be severely aggravated. Afterwards, we discuss representative stabilization strategies, including the surface treatment and construction of radial concentration gradients in polycrystalline secondary particles, the fabrication of rod-shaped primary particles, and the development of single-crystal NRLO cathodes. We then introduce emerging microstructural characterization techniques, especially for identification of the particle orientation, dynamic changes, and elemental distributions in NRLO microstructures. Finally, we provide perspectives on the remaining challenges and opportunities for the development of stable NRLO cathodes for the zero-carbon future.
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Affiliation(s)
- Jingyu Lu
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Chao Xu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wesley Dose
- School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Sunita Dey
- School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3FX, UK
| | - Xihao Wang
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Yehui Wu
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Deping Li
- State Key Laboratory of Advanced Welding and Joining, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Lijie Ci
- State Key Laboratory of Advanced Welding and Joining, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
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3
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Zhang Y, Gu X, Huang L, Yang Y, He J. Enhancing precision medicine: Bispecific antibody-mediated targeted delivery of lipid nanoparticles for potential cancer therapy. Int J Pharm 2024; 654:123990. [PMID: 38467208 DOI: 10.1016/j.ijpharm.2024.123990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/07/2024] [Accepted: 03/09/2024] [Indexed: 03/13/2024]
Abstract
The precise delivery of therapeutic agents to specific cell populations, including cancer cells, remains a target in modern medicine, to enhance treatment efficacy, while minimizing unintended side effects. This study presents a strategy utilizing bispecific antibodies for the targeted delivery of nucleic acid drugs to the surface of glucose-regulated protein 78 (GRP78)-overexpressing cancer cells. Strong binding affinity of the bispecific antibodies to GRP78-overexpressing cancer cells, including HEPG2 cells, confirmed the tumor-targeting potential of this platform. Functional analyses demonstrated the role of the bispecific antibodies in enhancing lipid nanoparticle (LNP) uptake, causing increased gene expression levels of nucleic acid drugs loaded within LNPs. In vivo imaging confirmed the potency of the bispecific-antibody-modified LNPs in delivering nucleic acid drugs to tumors and sustaining therapeutic expression levels. In vivo therapy results indicated that the bispecific antibodies improved the antitumor activity of PE38-loaded LNPs in tumors overexpressing surface GRP78. This study pioneered a bispecific-antibody-centered platform for the targeted delivery of nucleic acid drugs. The robust antigen-antibody binding affinity, tumor-selective interactions, enhanced cellular uptake, and proficient gene expression promise to advance precision therapeutics in oncology. Continued refinement and translation of this drug delivery strategy are important to unlock its full clinical potential.
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Affiliation(s)
- Yue Zhang
- National Advanced Medical Engineering Research Center, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Shanghai 201203, PR China
| | - Xiaoyan Gu
- National Advanced Medical Engineering Research Center, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Shanghai 201203, PR China
| | - Lili Huang
- National Advanced Medical Engineering Research Center, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Shanghai 201203, PR China
| | - Yani Yang
- National Advanced Medical Engineering Research Center, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Shanghai 201203, PR China
| | - Jun He
- National Advanced Medical Engineering Research Center, China State Institute of Pharmaceutical Industry, 285 Gebaini Road, Shanghai 201203, PR China.
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4
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Sun Y, Zhang X, Huang R, Yang D, Kim J, Chen J, Ang EH, Li M, Li L, Song X. Revealing microscopic dynamics: in situ liquid-phase TEM for live observations of soft materials and quantitative analysis via deep learning. NANOSCALE 2024; 16:2945-2954. [PMID: 38236129 DOI: 10.1039/d3nr04480g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
In various domains spanning materials synthesis, chemical catalysis, life sciences, and energy materials, in situ transmission electron microscopy (TEM) methods exert a profound influence. These methodologies enable the real-time observation and manipulation of gas-phase and liquid-phase reactions at the nanoscale, facilitating the exploration of pivotal reaction mechanisms. Fundamental research areas like crystal nucleation, growth, etching, and self-assembly have greatly benefited from these techniques. Additionally, their applications extend across diverse fields such as catalysis, batteries, bioimaging, and drug delivery kinetics. However, the intricate nature of 'soft matter' presents a challenge due to the unique molecular properties and dynamic behavior of these substances that remain insufficiently understood. Investigating soft matter within in situ liquid-phase TEM settings demands further exploration and advancement compared to other research domains. This research harnesses the potential of in situ liquid-phase TEM technology while integrating deep learning methodologies to comprehensively analyze the quantitative aspects of soft matter dynamics. This study centers on diverse phenomena, encompassing surfactant molecule nucleation, block copolymer behavior, confinement-driven self-assembly, and drying processes. Furthermore, deep learning techniques are employed to precisely analyze Ostwald ripening and digestive ripening dynamics. The outcomes of this study not only deepen the understanding of soft matter at its fundamental level but also serve as a pivotal foundation for developing innovative functional materials and cutting-edge devices.
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Affiliation(s)
- Yangyang Sun
- School of Mathematics, Statistics and Mechanics, Beijing University of Technology, Beijing 100124, China.
| | - Xingyu Zhang
- School of Mathematics, Statistics and Mechanics, Beijing University of Technology, Beijing 100124, China.
| | - Rui Huang
- School of Materials Science and Engineering, Hefei University of Technology, Anhui Province, 230009, China.
| | - Dahai Yang
- School of Materials Science and Engineering, Hefei University of Technology, Anhui Province, 230009, China.
| | - Juyeong Kim
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, South Korea
| | - Junhao Chen
- School of Materials Science and Engineering, Hefei University of Technology, Anhui Province, 230009, China.
| | - Edison Huixiang Ang
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore
| | - Mufan Li
- Institute of Physical Chemistry, the College of Chemistry and Molecular Engineering, Pecking University, Beijing, 100871, China
| | - Lin Li
- Beijing Shunce Technology Co., Ltd, Beijing, 102629, China
| | - Xiaohui Song
- School of Materials Science and Engineering, Hefei University of Technology, Anhui Province, 230009, China.
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5
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Zhou G, Li P, Xiao Y, Chen S, Weng S, Dong R, Lin D, Wu DY, Yang L. Observing π-Au Interaction between Aromatic Molecules and Single Au Nanodimers with a Subnanometer Gap by SERS. Anal Chem 2024; 96:197-203. [PMID: 38016046 DOI: 10.1021/acs.analchem.3c03600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Interface interaction between aromatic molecules and noble metals plays a prominent role in fundamental science and technological applications. However, probing π-metal interactions under ambient conditions remains challenging, as it requires characterization techniques to have high sensitivity and molecular specificity without any restrictions on the sample. Herein, the interactions between polycyclic aromatic hydrocarbon (PAH) molecules and Au nanodimers with a subnanometer gap are investigated by surface-enhanced Raman spectroscopy (SERS). A cleaner and stronger plasmonic field of subnanometer gap Au nanodimer structures was constructed through solvent extraction. High sensitivity and strong π-Au interaction between PAHs and Au nanodimers are observed. Additionally, the density functional theory calculation confirmed the interactions of PAHs physically absorbed on the Au surface; the binding energy and differential charge further theoretically indicated the correlation between the sensitivity and the number of PAH rings, which is consistent with SERS experimental results. This work provides a new method to understand the interactions between aromatic molecules and noble metal surfaces in an ambient environment, also paving the way for designing the interfaces in the fields of catalysis, sensors, and molecular electronics.
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Affiliation(s)
- Guoliang Zhou
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science & Technology of China, Hefei 230026, Anhui China
| | - Pan Li
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Department of Pharmacy, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, Anhui China
| | - Yuanhui Xiao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Siyu Chen
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science & Technology of China, Hefei 230026, Anhui China
| | - Shirui Weng
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Ronglu Dong
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Dongyue Lin
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- Department of Pharmacy, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, Anhui China
| | - De-Yin Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Liangbao Yang
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science & Technology of China, Hefei 230026, Anhui China
- Department of Pharmacy, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, Anhui China
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6
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Lee J, Nakouzi E, Heo J, Legg BA, Schenter GK, Li D, Park C, Ma H, Chun J. Effects of particle shape and surface roughness on van der Waals interactions and coupling to dynamics in nanocrystals. J Colloid Interface Sci 2023; 652:1974-1983. [PMID: 37690305 DOI: 10.1016/j.jcis.2023.08.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/22/2023] [Accepted: 08/25/2023] [Indexed: 09/12/2023]
Abstract
The van der Waals interaction between colloids and nanoparticles is one of the key components to understanding particle aggregation, attachment, and assembly. While the ubiquity of anisotropic particle shapes and surface roughness is well-recognized in nanocrystalline materials, the effects of both on van der Waals forces and torques have not been adequately investigated. In this study, we develop a numerical scheme to determine the van der Waals forces and torques between cubic particles with multiple configurations and relative orientations. Our results show that the van der Waals torque due to anisotropic particle shapes is appreciable at nearly all configurations and mutual angles, outcompeting Brownian torque for various materials systems and conditions. Surface roughness enhances this particle shape effect, resulting in stronger van der Waals interactions ascribed to protrusions on the surfaces. Moreover, a scaling analysis indicates that the surface roughness alters the separation dependence of the van der Waals force and, more importantly, significantly influences the dynamics of two approaching particles. Our results clearly demonstrate that surface roughness and anisotropic shape play a crucial role in the energetics and kinetics of various particle-scale and emergent phenomena, such as crystal growth by oriented attachment, nanomaterials synthesis and assembly, mud flow rheology, as well as the deposition of natural nanocrystals within the subsurface.
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Affiliation(s)
- Jaewon Lee
- Department of Mechanical and Aerospace Engineering, University of Missouri, 416 South 6th Street, Columbia 65211, United States.
| | - Elias Nakouzi
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jaeyoung Heo
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Benjamin A Legg
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Gregory K Schenter
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Dongsheng Li
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Chanwoo Park
- Department of Mechanical and Aerospace Engineering, University of Missouri, 416 South 6th Street, Columbia 65211, United States
| | - Hongbin Ma
- Department of Mechanical and Aerospace Engineering, University of Missouri, 416 South 6th Street, Columbia 65211, United States
| | - Jaehun Chun
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States; Levich Institute and Department of Chemical Engineering, CUNY City College of New York, New York, New York 10031, United States.
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7
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Liu S, Han X, Ophus C, Zhou S, Jiang YH, Sun Y, Zhao T, Yang F, Gu M, Tan YZ, Sun SG, Zheng H, Liao HG. Observing ion diffusion and reciprocating hopping motion in water. SCIENCE ADVANCES 2023; 9:eadf8436. [PMID: 37506205 PMCID: PMC10381929 DOI: 10.1126/sciadv.adf8436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 06/26/2023] [Indexed: 07/30/2023]
Abstract
When an ionic crystal dissolves in solvent, the positive and negative ions associated with solvent molecules release from the crystal. However, the existing form, interaction, and dynamics of ions in real solution are poorly understood because of the substantial experimental challenge. We observed the diffusion and aggregation of polyoxometalate (POM) ions in water by using liquid phase transmission electron microscopy. Real-time observation reveals an unexpected local reciprocating hopping motion of the ions in water, which may be caused by the short-range polymerized bridge of water molecules. We find that ion oligomers, existing as highly active clusters, undergo frequent splitting, aggregation, and rearrangement in dilute solution. The formation and dissociation of ion oligomers indicate a weak counterion-mediated interaction. Furthermore, POM ions with tetrahedral geometry show directional interaction compared with spherical ions, which presents structure-dependent dynamics.
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Affiliation(s)
- Sangui Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xinbao Han
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Colin Ophus
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Shiyuan Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - You-Hong Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yue Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Tiqing Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Fei Yang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Meng Gu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yuan-Zhi Tan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shi-Gang Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Haimei Zheng
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - Hong-Gang Liao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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8
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Han X, Su R, Chen W, Han Q, Tian Y, Han J, Wang X, Song S, Reddy KM, Deng H, Liu P, Chen M. Oriented attachment interfaces of zeolitic imidazolate framework nanocrystals. NANOSCALE 2023; 15:7703-7709. [PMID: 37039237 DOI: 10.1039/d3nr00702b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Understanding the growth and coarsening mechanisms of metal-organic framework (MOF) nanoparticles is crucially important for the design and fabrication of MOF materials with diverse functionalities and controllable stability. Oriented attachment (OA) growth is a common manner of MOF nanocrystal coarsening and agglomeration, but the underlying molecular mechanisms have not been well understood to date. Here we report the molecular-scale characterization of the OA interfaces of zeolitic imidazolate framework (ZIF) crystals by state-of-the-art low-dose aberration-corrected transmission electron microscopy. A series of OA interfaces with different molecular structures are captured, implying that multiple kinetic steps are involved in the OA growth of ZIF crystals from non-directional physical attractions between primary nanocrystals, lattice-aligned attachment of the ligand-capped nanocrystals, to coherent interfaces with perfect lattice alignment or stacking faults. It was found that the surface-capping organic ligands not only play an essential role in crystal lattice alignment by near-field directional interactions, but also dominate the interfacial reaction kinetics by interfacial diffusion-controlled elimination of excess surface-capping ligands. These observations provide molecular-scale insights into the OA growth mechanisms of ZIF crystals, which is important for engineering MOF crystal growth pathways by designing surface-capping ligands.
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Affiliation(s)
- Xiaocang Han
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Rui Su
- College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China
| | - Wenqian Chen
- Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Qi Han
- Key Laboratory of Biomedical Polymers-Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Yuan Tian
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
| | - Jiuhui Han
- Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Xiaodong Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Shuangxi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Kolan Madhav Reddy
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Hexiang Deng
- Key Laboratory of Biomedical Polymers-Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Pan Liu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Mingwei Chen
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
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9
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Li D, Chen Q, Chun J, Fichthorn K, De Yoreo J, Zheng H. Nanoparticle Assembly and Oriented Attachment: Correlating Controlling Factors to the Resulting Structures. Chem Rev 2023; 123:3127-3159. [PMID: 36802554 DOI: 10.1021/acs.chemrev.2c00700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Nanoparticle assembly and attachment are common pathways of crystal growth by which particles organize into larger scale materials with hierarchical structure and long-range order. In particular, oriented attachment (OA), which is a special type of particle assembly, has attracted great attention in recent years because of the wide range of material structures that result from this process, such as one-dimensional (1D) nanowires, two-dimensional (2D) sheets, three-dimensional (3D) branched structures, twinned crystals, defects, etc. Utilizing in situ transmission electron microscopy techniques, researchers observed orientation-specific forces that act over short distances (∼1 nm) from the particle surfaces and drive the OA process. Integrating recently developed 3D fast force mapping via atomic force microscopy with theories and simulations, researchers have resolved the near-surface solution structure, the molecular details of charge states at particle/fluid interfaces, inhomogeneity of surface charges, and dielectric/magnetic properties of particles that influence short- and long-range forces, such as electrostatic, van der Waals, hydration, and dipole-dipole forces. In this review, we discuss the fundamental principles for understanding particle assembly and attachment processes, and the controlling factors and resulting structures. We review recent progress in the field via examples of both experiments and modeling, and discuss current developments and the future outlook.
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Affiliation(s)
- Dongsheng Li
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Jaehun Chun
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Levich Institute and Department of Chemical Engineering, CUNY City College of New York; New York, New York 10031, United States
| | - Kristen Fichthorn
- Department of Chemical Engineering, The Pennsylvania State University; University Park, Pennsylvania 16802, United States
| | - James De Yoreo
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Materials Science and Engineering, University of Washington, Seattle Washington 98195, United States
| | - Haimei Zheng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley California 94720, United States
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
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10
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Petersen N, Girard M, Riedinger A, Valsson O. The Crucial Role of Solvation Forces in the Steric Stabilization of Nanoplatelets. NANO LETTERS 2022; 22:9847-9853. [PMID: 36493312 PMCID: PMC9801426 DOI: 10.1021/acs.nanolett.2c02848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 12/02/2022] [Indexed: 06/17/2023]
Abstract
The steric stability of inorganic colloidal particles in an apolar solvent is usually described in terms of the balance between three contributions: the van der Waals attraction, the free energy of mixing, and the ligand compression. However, in the case of nanoparticles, the discrete nature of the ligand shell and the solvent has to be taken into account. Cadmium selenide nanoplatelets are a special case. They combine a weak van der Waals attraction and a large facet to particle size ratio. We use coarse grained molecular dynamics simulations of nanoplatelets in octane to demonstrate that solvation forces are strong enough to induce the formation of nanoplatelet stacks and by that have a crucial impact on the steric stability. In particular, we demonstrate that for sufficiently large nanoplatelets, solvation forces are proportional to the interacting facet area, and their strength is intrinsically tied to the softness of the ligand shell.
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Affiliation(s)
- Nanning Petersen
- Max
Planck Institute for Polymer Research, Mainz D-55128, Germany
| | - Martin Girard
- Max
Planck Institute for Polymer Research, Mainz D-55128, Germany
| | | | - Omar Valsson
- Max
Planck Institute for Polymer Research, Mainz D-55128, Germany
- Department
of Chemistry, University of North Texas, Denton, Texas 76201, United States
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11
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Yue S, Yuan W, Deng Z, Xi W, Shen Y. In Situ TEM Observation of the Atomic Transport Process during the Coalescence of Au Nanoparticles. NANO LETTERS 2022; 22:8115-8121. [PMID: 36197114 DOI: 10.1021/acs.nanolett.2c02491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In practical applications, the coalescence of metal nanoparticles (NPs) is a major factor affecting their physical chemistry properties. Currently, due to a lack of understanding of the atomic-level mechanisms during the nucleation and growth stages of coalescence, the correlation between the different dynamic factors in the different stages of NP coalescence is unclear. In this study, we used advanced in situ characterization techniques to observe the formation of atomic material transport channels (Au chains) during the initiation of coalescence nucleation. We focused on the movement and migration states of Au atoms and discovered an atomic ordered arrangement growth mechanism that occurs after the completion of nucleation. Simultaneously, we used density functional theory to reveal the formation principle of Au chains. These findings improve our understanding of the atomic-scale coalescence process, which can provide a new perspective for further research on coalescence atomic dynamics.
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Affiliation(s)
- Shengnan Yue
- Center for Electron Microscopy and Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Wenjuan Yuan
- Center for Electron Microscopy and Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Ziliang Deng
- Center for Electron Microscopy and Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Wei Xi
- Center for Electron Microscopy and Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Yongli Shen
- Center for Electron Microscopy and Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
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12
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Arafa WM, Elkomy MH, Aboud HM, Ali MI, Abdel Gawad SS, Aboelhadid SM, Mahdi EA, Alsalahat I, Abdel-Tawab H. Tunable Polymeric Mixed Micellar Nanoassemblies of Lutrol F127/Gelucire 44/14 for Oral Delivery of Praziquantel: A Promising Nanovector against Hymenolepis nana in Experimentally-Infected Rats. Pharmaceutics 2022; 14:pharmaceutics14102023. [PMID: 36297459 PMCID: PMC9608995 DOI: 10.3390/pharmaceutics14102023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/29/2022] Open
Abstract
Hymenolepiasis represents a parasitic infection of common prevalence in pediatrics with intimidating impacts, particularly amongst immunocompromised patients. The present work aimed to snowball the curative outcomes of the current mainstay of hymenolepiasis chemotherapy, praziquantel (PRZ), through assembly of polymeric mixed micelles (PMMs). Such innovative nano-cargo could consolidate PRZ hydrosolubility, extend its circulation time and eventually upraise its bioavailability, thus accomplishing a nanoparadigm for hymenolepiasis tackling at lower dose levels. For consummating this goal, PRZ-PMMs were tailored via thin-film hydration technique integrating a binary system of Lutrol F127 and Gelucire 44/14. Box-Behnken design was planned for optimizing the nanoformulation variables employing Design-Expert® software. Also, in Hymenolepis nana-infected rats, the pharmacodynamics of the optimal micellar formulation versus the analogous crude PRZ suspension were scrutinized on the 1st and 3rd days after administration of a single oral dose (12.5 or 25 mg/kg). Moreover, in vitro ovicidal activity of the monitored formulations was estimated utilizing Fuchsin vital stain. Furthermore, the in vivo pharmacokinetics were assessed in rats. The optimum PRZ-PMMs disclosed conciliation between thermodynamic and kinetic stability, high entrapment efficiency (86.29%), spherical nanosized morphology (15.18 nm), and controlled-release characteristics over 24 h (78.22%). 1H NMR studies verified PRZ assimilation within the micellar core. Additionally, the in vivo results highlighted a significant boosted efficacy of PRZ-PMMs manifested by fecal eggs output and worm burden reduction, which was clearly evident at the lesser PRZ dose, besides a reversed effect for the intestinal histological disruptions. At 50 µg/mL, PRZ-PMMs increased the percent of non-viable eggs to 100% versus 47% for crude PRZ, whilst shell destruction and loss of embryo were only clear with the applied nano-cargo. Moreover, superior bioavailability by 3.43-fold with elongated residence time was measured for PRZ-PMMs compared to PRZ suspension. Practically, our results unravel the potential of PRZ-PMMs as an oral promising tolerable lower dose nanoplatform for more competent PRZ mass chemotherapy.
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Affiliation(s)
- Waleed M. Arafa
- Department of Parasitology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Mohammed H. Elkomy
- Department of Pharmaceutics, College of Pharmacy, Jouf University, Sakaka 72341, Saudi Arabia
- Correspondence: (M.H.E.); (I.A.)
| | - Heba M. Aboud
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mona Ibrahim Ali
- Department of Medical Parasitology, Faculty of Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Samah S. Abdel Gawad
- Department of Medical Parasitology, Faculty of Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Shawky M. Aboelhadid
- Department of Parasitology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Emad A. Mahdi
- Department of Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Izzeddin Alsalahat
- UK Dementia Research Institute Cardiff, School of Medicine, Cardiff University, Cardiff CF24 1TP, UK
- Correspondence: (M.H.E.); (I.A.)
| | - Heba Abdel-Tawab
- Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef 62521, Egypt
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13
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Kim J, Kang D, Kang S, Kim BH, Park J. Coalescence dynamics of platinum group metal nanoparticles revealed by liquid-phase TEM. iScience 2022; 25:104699. [PMID: 35880046 PMCID: PMC9307684 DOI: 10.1016/j.isci.2022.104699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 05/17/2022] [Accepted: 06/27/2022] [Indexed: 10/31/2022] Open
Abstract
Coalescence, one of the major pathways observed in the growth of nanoparticles, affects the structural diversity of the synthesized nanoparticles in terms of sizes, shapes, and grain boundaries. As coalescence events occur transiently during the growth of nanoparticles and are associated with the interaction between nanoparticles, mechanistic understanding is challenging. The ideal platform to study coalescence events may require real-time tracking of nanoparticle growth trajectories with quantitative analysis for coalescence events. Herein, we track nanoparticle growth trajectories using liquid-cell transmission electron microscopy (LTEM) to investigate the role of coalescence in nanoparticle formation and their morphologies. By evaluating multiple coalescence events for different platinum group metals, we reveal that the surface energy and ligand binding energy determines the rate of the reshaping process and the resulting final morphology of coalesced nanoparticles. The coalescence mechanism, based on direct LTEM observation explains the structures of noble metal nanoparticles that emerge in colloidal synthesis. Image processing of in situ liquid cell TEM image Size-dependent coalescence behaviors of metal nanoparticles Different kinetics of Pt and Pd nanoparticles owing to their different surface energies Reshaping kinetics determines the final morphology of coalesced nanoparticles
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14
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Sung J, Bae Y, Park H, Kang S, Choi BK, Kim J, Park J. Liquid-Phase Transmission Electron Microscopy for Reliable In Situ Imaging of Nanomaterials. Annu Rev Chem Biomol Eng 2022; 13:167-191. [PMID: 35700529 DOI: 10.1146/annurev-chembioeng-092120-034534] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Liquid-phase transmission electron microscopy (LPTEM) is a powerful in situ visualization technique for directly characterizing nanomaterials in the liquid state. Despite its successful application in many fields, several challenges remain in achieving more accurate and reliable observations. We present LPTEM in chemical and biological applications, including studies for the morphological transformation and dynamics of nanoparticles, battery systems, catalysis, biomolecules, and organic systems. We describe the possible interactions and effects of the electron beam on specimens during observation and present sample-specific approaches to mitigate and control these electron-beam effects. We provide recent advances in achieving atomic-level resolution for liquid-phase investigation of structures anddynamics. Moreover, we discuss the development of liquid cell platforms and the introduction of machine-learning data processing for quantitative and objective LPTEM analysis.
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Affiliation(s)
- Jongbaek Sung
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Yuna Bae
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Hayoung Park
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Sungsu Kang
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Back Kyu Choi
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Joodeok Kim
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea
| | - Jungwon Park
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, Republic of Korea; , , , , , , .,Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, Republic of Korea.,Institute of Engineering Research, College of Engineering, Seoul National University, Seoul, Republic of Korea.,Advanced Institutes of Convergence Technology, Seoul National University, Gwanggyo-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, Republic of Korea
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15
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Jin B, Yan F, Qi X, Cai B, Tao J, Fu X, Tan S, Zhang P, Pfaendtner J, Naser NY, Baneyx F, Zhang X, DeYoreo JJ, Chen C. Peptoid-Directed Formation of Five-Fold Twinned Au Nanostars through Particle Attachment and Facet Stabilization. Angew Chem Int Ed Engl 2022; 61:e202201980. [PMID: 35167709 PMCID: PMC9258440 DOI: 10.1002/anie.202201980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Indexed: 11/17/2022]
Abstract
While bio-inspired synthesis offers great potential for controlling nucleation and growth of inorganic particles, precisely tuning biomolecule-particle interactions is a long-standing challenge. Herein, we used variations in peptoid sequence to manipulate peptoid-Au interactions, leading to the synthesis of concave five-fold twinned, five-pointed Au nanostars via a process of repeated particle attachment and facet stabilization. Ex situ and liquid-phase TEM observations show that a balance between particle attachment biased to occur near the star points, preferential growth along the [100] direction, and stabilization of (111) facets is critical to forming star-shaped particles. Molecular simulations predict that interaction strengths between peptoids and distinct Au facets differ significantly and thus can alter attachment kinetics and surface energies to form the stars. This work provides new insights into how sequence-defined ligands affect particle growth to regulate crystal morphology.
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Affiliation(s)
- Biao Jin
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - Feng Yan
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- School of Chemistry & Chemical Engineering, Linyi University The Middle Part of Shuangling Road, Linyi, Shandong Province, 276005 (China)
| | - Xin Qi
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Bin Cai
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - Jinhui Tao
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - Xiaofeng Fu
- Department of Biological Science, Florida State University 600 W College Ave, Tallahassee, FL 32306 (USA)
| | - Susheng Tan
- Department of Electrical and Computer Engineering & Petersen Institute of Nanoscience and Engineering (PINSE) University of Pittsburgh 4200 Fifth Ave, Pittsburgh, PA 15260 (USA)
| | - Peijun Zhang
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford University Offices, Wellington Square, Oxford, OX1 2JD (UK)
- Diamond Light Source Harwell Science and Innovation Campus, Didcot OX11 0DE (UK)
| | - Jim Pfaendtner
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Nada Y. Naser
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - François Baneyx
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Xin Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - James J. DeYoreo
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- Department of Materials Science and Engineering University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Chunlong Chen
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
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16
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Jin B, Yan F, Qi X, Cai B, Tao J, Fu X, Tan S, Zhang P, Pfaendtner J, Naser NY, Baneyx F, Zhang X, DeYoreo JJ, Chen C. Peptoid‐Directed Formation of Five‐Fold Twinned Au Nanostars through Particle Attachment and Facet Stabilization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Biao Jin
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
| | - Feng Yan
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- School of Chemistry & Chemical Engineering Linyi University The Middle Part of Shuangling Road Linyi Shandong Province 276005 China
| | - Xin Qi
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Bin Cai
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- School of Chemistry and Chemical Engineering Shandong University Shanda Nan Road 27 Jinan China
| | - Jinhui Tao
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
| | - Xiaofeng Fu
- Department of Biological Science Florida State University 600 W College Ave Tallahassee FL 32306 USA
| | - Susheng Tan
- Department of Electrical and Computer Engineering & Petersen Institute of Nanoscience and Engineering (PINSE) University of Pittsburgh 4200 Fifth Ave Pittsburgh PA 15260 USA
| | - Peijun Zhang
- Division of Structural Biology Wellcome Trust Centre for Human Genetics University of Oxford Roosevelt Drive, Wellington Square Oxford OX3 7BN UK
- Diamond Light Source Harwell Science and Innovation Campus Didcot OX11 0DE UK
| | - Jim Pfaendtner
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Nada Y. Naser
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - François Baneyx
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Xin Zhang
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
| | - James J. DeYoreo
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- Department of Materials Science and Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Chun‐Long Chen
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
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17
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Yang J, Li X, Zhang J, Zhou Y, Wang Y. Direct Formation of Colloidal All-Inorganic Metal Nanocrystals from Magic-Size Clusters. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22838-22846. [PMID: 35080849 DOI: 10.1021/acsami.1c20953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
All-inorganic metal nanocrystals (NCs) offer an ideal platform for atomically precise surface design and show improved electrocatalytic activity compared to conventional NCs capped with organic ligands. Here, we show the possibility of obtaining colloidal all-inorganic Au NCs directly from magic-size clusters (MSCs) with the assistance of inorganic molecules, NOBF4 or Na2S2O8. The unique advantages of NOBF4 or Na2S2O8 as both oxidizing agents and stripping ligands are taken to tune the surface state of Au25(PET)18-TOA+ MSCs and assemble them to form either positively or negatively charged all-inorganic Au NCs. We show that positively charged all-inorganic Au NCs can be further modified with different functional groups, which provide the possibility to meet the target requirements. We found that the negatively charged NCs exhibit improved faradaic efficiency (FE = 92%) for the reduction of CO2 to CO at -0.369 V (vs RHE) and a 5-fold increase in current density compared to organic-capped Au NCs (FE = 67%). In addition, we extended this approach to other MSCs and formed all-inorganic metal NCs with different compositions and morphologies. The use of simple inorganic ligands to induce the conversion from MSCs to metal NCs enriches the current solution process of synthesizing all-inorganic NCs and can open up more opportunities for designing colloidal nanocrystal catalysts.
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Affiliation(s)
- Jinling Yang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Xiang Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Jianrong Zhang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Yang Zhou
- Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
| | - Yuanyuan Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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18
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De Yoreo JJ, Nakouzi E, Jin B, Chun J, Mundy CJ. Assembly-based pathways of crystallization. Faraday Discuss 2022; 235:9-35. [DOI: 10.1039/d2fd00061j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solution crystallization of materials ranging from simple salts to complex supramolecular assemblies has long been viewed through the lens of classical nucleation and growth theories in which monomeric building blocks...
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19
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Li Z, Ruiz VG, Kanduč M, Dzubiella J. Highly Heterogeneous Polarization and Solvation of Gold Nanoparticles in Aqueous Electrolytes. ACS NANO 2021; 15:13155-13165. [PMID: 34370454 DOI: 10.1021/acsnano.1c02668] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The performance of gold nanoparticles (NPs) in applications depends critically on the structure of the NP-solvent interface, at which the electrostatic surface polarization is one of the key characteristics that affects hydration, ionic adsorption, and electrochemical reactions. Here, we demonstrate significant effects of explicit metal polarizability on the solvation and electrostatic properties of bare gold NPs in aqueous electrolyte solutions of sodium salts of various anions (Cl-, BF4-, PF6-, nitrophenolate, and 3- and 4-valent hexacyanoferrate), using classical molecular dynamics simulations with a polarizable core-shell model for the gold atoms. We find considerable spatial heterogeneity of the polarization and electrostatic potentials on the NP surface, mediated by a highly facet-dependent structuring of the interfacial water molecules. Moreover, ion-specific, facet-dependent ion adsorption leads to considerable alterations of the interfacial polarization. Compared to nonpolarizable NPs, surface polarization modifies water local dipole densities only slightly but has substantial effects on the electrostatic surface potentials and leads to significant lateral redistributions of ions on the NP surface. Besides, interfacial polarization effects cancel out in the far field for monovalent ions but not for polyvalent ions, as anticipated from continuum "image-charge" concepts. Far-field effective Debye-Hückel surface potentials change accordingly in a valence-specific fashion. Hence, the explicit charge response of metal NPs is crucial for the accurate description and interpretation of interfacial electrostatics (e.g., for charge transfer and interfacial polarization in catalysis and electrochemistry).
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Affiliation(s)
- Zhujie Li
- Applied Theoretical Physics-Computational Physics, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany
| | - Victor G Ruiz
- Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin, D-14109 Berlin, Germany
| | - Matej Kanduč
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - Joachim Dzubiella
- Applied Theoretical Physics-Computational Physics, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany
- Research Group for Simulations of Energy Materials, Helmholtz-Zentrum Berlin, D-14109 Berlin, Germany
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20
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Zheng Q, Shangguan J, Li X, Zhang Q, Bustillo KC, Wang LW, Jiang J, Zheng H. Observation of Surface Ligands-Controlled Etching of Palladium Nanocrystals. NANO LETTERS 2021; 21:6640-6647. [PMID: 34324356 DOI: 10.1021/acs.nanolett.1c02104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Selective adsorption of ligands on nanocrystal surfaces can affect oxidative etching. Here, we report the etching of palladium nanocrystals imaged using liquid cell transmission electron microscopy. The adsorption of surface ligands (i.e., iron acetylacetonate and its derivatives) and their role as inhibitor molecules on the etching process were investigated. Our observations revealed that the etching was dominated by the interplay between palladium facets and ligands and that the etching exhibited different pathways at different concentrations of ligands. At a low concentration of iron acetylacetonate (0.1 mM), rapid etching primarily at {100} facets led to a concave structure. At a high concentration (1.0 mM), the etch rate was decreased owing to a protective film of iron acetylacetonate on the {100} facets and a round nanoparticle was achieved. Ab initio calculations showed that the differences in adsorption energy of inhibitor molecules on palladium facets were responsible for the etching behavior.
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Affiliation(s)
- Qi Zheng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- School of Materials Science and Engineering, Southeast University, Nanjing 211189, P.R. China
| | - Junyi Shangguan
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Xinle Li
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Qiubo Zhang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Karen C Bustillo
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jinyang Jiang
- School of Materials Science and Engineering, Southeast University, Nanjing 211189, P.R. China
| | - Haimei Zheng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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21
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Sakakibara N, Inoue K, Takahashi S, Goto T, Ito T, Akada K, Miyawaki J, Hakuta Y, Terashima K, Harada Y. Soft X-ray emission spectroscopy for the electronic state of water molecules influenced by plasma-treated multi-walled carbon nanotubes. Phys Chem Chem Phys 2021; 23:10468-10474. [PMID: 33890957 DOI: 10.1039/d0cp05990k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In this study, soft X-ray emission spectroscopy of an aqueous colloidal dispersion of multi-walled carbon nanotubes modified via the plasma process in an aqueous solution was performed for investigating the electronic state of water molecules on the colloidal particles. In the aqueous dispersion, reconstruction of the hydrogen-bonded network was implied by the O 1s spectral changes in the 1b1' and 1b1'' peaks. Furthermore, the O 1s spectral intensity around the 3a1 state was enhanced to an unusually broad energy range in comparison with previous studies. This unusual spectral change might be attributed to the hybridization of the electronic states of oxygen-containing functional groups on the surface of the plasma-modified multi-walled carbon nanotubes and that of the surrounding water molecules. Our observation indicates not only reconstruction of the hydrogen-bonded network in the aqueous dispersion but also a significant interaction of the electronic states between the water molecules and the plasma-modified multi-walled carbon nanotubes.
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Affiliation(s)
- Noritaka Sakakibara
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan
| | - Kenichi Inoue
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan
| | - Shion Takahashi
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
| | - Taku Goto
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan
| | - Tsuyohito Ito
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan
| | - Keishi Akada
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan and Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan.
| | - Jun Miyawaki
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan and Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan.
| | - Yukiya Hakuta
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan
| | - Kazuo Terashima
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan
| | - Yoshihisa Harada
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. and AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589, Japan and Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan and Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan.
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22
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Mukherjee S, Pramanik S, Das S, Chakraborty S, Mondal S, Ghosh T, Nath R, Kuiri PK. Oriented attachment induced morphology modulation of ZnO nanoparticles at low temperature using KOH as a morphology controller. NEW J CHEM 2021. [DOI: 10.1039/d1nj02248b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Oriented attachment induced shape transition of ZnO nanoparticles from nanosphere to nanorod. The shape of the nanoparticles is controlled by the concentration of KOH.
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Affiliation(s)
- Sumit Mukherjee
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Subhamay Pramanik
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Sandip Das
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Subhabrata Chakraborty
- Indian Institute of Engineering Science and Technology, Howrah, 711103, West Bengal, India
| | - Shyamal Mondal
- Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
- Fondazione Bruno Kessler, Center for Materials and Microsystems-Micro Nano Facility, Via Sommarive 18, 38123 Trento, Italy
| | - Tatan Ghosh
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
- Department of Physics, Balarampur College, P.O - Rangadih, Purulia, 723143, West Bengal, India
| | - Rajib Nath
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Probodh K. Kuiri
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
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23
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Bae Y, Lim K, Kim S, Kang D, Kim BH, Kim J, Kang S, Jeon S, Cho J, Lee WB, Lee WC, Park J. Ligand-Dependent Coalescence Behaviors of Gold Nanoparticles Studied by Multichamber Graphene Liquid Cell Transmission Electron Microscopy. NANO LETTERS 2020; 20:8704-8710. [PMID: 33186041 DOI: 10.1021/acs.nanolett.0c03517] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The formation mechanism of colloidal nanoparticles is complex because significant nonclassical pathways coexist with the conventional nucleation and growth processes. Particularly, the coalescence of the growing clusters determines the final morphology and crystallinity of the synthesized nanoparticles. However, the experimental investigation of the coalescence mechanism is a challenge because the process is highly kinetic and correlates with surface ligands that dynamically modify the surface energy and the interparticle interactions of nanoparticles. Here, we employ quantitative in situ TEM with multichamber graphene liquid cell to observe the coalescence processes occurring in the synthesis of gold nanoparticles in different ligand systems, thus affording us an insight into their ligand-dependent coalescence kinetics. The analyses of numerous liquid-phase TEM trajectories of the coalescence and MD simulations of the ligand shells demonstrate that enhanced ligand mobility, employing a heterogeneous ligand mixture, results in the rapid nanoparticle pairing approach and a fast post-merging structural relaxation.
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Affiliation(s)
- Yuna Bae
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Kitaek Lim
- Department of Mechanical Engineering, Major in Materials, Devices, and Equipment, Hanyang University, Ansan, Gyeonggi 15588, Republic of Korea
| | - Seulwoo Kim
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Dohun Kang
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Byung Hyo Kim
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
- Department of Organic Materials and Fiber Engineering, Soongsil University, Seoul 06978, Republic of Korea
| | - Joodeok Kim
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Sungsu Kang
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Sungho Jeon
- Department of Mechanical Engineering, Major in Materials, Devices, and Equipment, Hanyang University, Ansan, Gyeonggi 15588, Republic of Korea
| | - JunBeom Cho
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Won Bo Lee
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Won Chul Lee
- Department of Mechanical Engineering, Major in Materials, Devices, and Equipment, Hanyang University, Ansan, Gyeonggi 15588, Republic of Korea
| | - Jungwon Park
- School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
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24
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Keller D, Henninen TR, Erni R. Atomic mechanisms of gold nanoparticle growth in ionic liquids studied by in situ scanning transmission electron microscopy. NANOSCALE 2020; 12:22511-22517. [PMID: 33174891 DOI: 10.1039/d0nr06541b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Elementary atomic mechanisms underlying nanoparticle growth in liquids are largely unexplored and mostly a subject of conjectures based on theory and indirect experimental insights. Direct, experimental observation of such processes at an atomic level requires imaging with single-atom sensitivity and control over kinetics. Although conventional liquid-cell (scanning) transmission electron microscopy ((S)TEM) enables nanoscale studies of dynamic processes, the visualization of atomic processes in the liquid phase is inhibited owing to the liquid film thickness and its encapsulation, both limiting the achievable spatial resolution. In contrast, by using thin, free-standing ionic liquid nanoreactors, this work shows that the mechanisms controlling and triggering particle growth can be uncovered at an atom-by-atom level. Our observations of growing particle ensembles reveal that diverse growth pathways proceed simultaneously. We record Ostwald ripening and oriented particle coalescence tracked at the atomic scale, which confirm the mechanisms suggested by theory. However, we also identify unexpected growth phenomena and more intricate coalescence events which show competing mechanisms. The diversity of the observed growth processes thus illustrates that growth reactions in liquids, on the atomic scale, are much more complex than predicted by theory. Furthermore, this work demonstrates that free-standing ionic liquids enable (sub-)Ångström resolution imaging of dynamic processes in liquids with single-atom sensitivity, thus providing a powerful alternative approach to conventional liquid-cell (S)TEM.
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Affiliation(s)
- Debora Keller
- Electron Microscopy Center, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600, Dübendorf, Switzerland.
| | - Trond R Henninen
- Electron Microscopy Center, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600, Dübendorf, Switzerland.
| | - Rolf Erni
- Electron Microscopy Center, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600, Dübendorf, Switzerland.
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25
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Ogata AF, Mirabello G, Rakowski AM, Patterson JP. Revealing Nonclassical Nucleation Pathways Using Cryogenic Electron Microscopy. ACTA ACUST UNITED AC 2020. [DOI: 10.1021/bk-2020-1358.ch007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- Alana F. Ogata
- Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, Massachusetts 02115, United States
- Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Giulia Mirabello
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Alexander M. Rakowski
- Department of Chemistry, University of California—Irvine, Irvine, California 92697-2025, United States
| | - Joseph P. Patterson
- Department of Chemistry, University of California—Irvine, Irvine, California 92697-2025, United States
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26
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Li T, Shen C, Wu S, Jin C, Bradford SA. Synergies of surface roughness and hydration on colloid detachment in saturated porous media: Column and atomic force microscopy studies. WATER RESEARCH 2020; 183:116068. [PMID: 32619803 DOI: 10.1016/j.watres.2020.116068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 06/11/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
Saturated column experiments were conducted to systematically examine the influence of hydration on the detachment of nano- and micro-sized latex colloids (35 nm and 1 μm, respectively) from sand. The colloids were attached on the sand in primary minima (PM) using high ionic strength (IS) NaCl solutions. The PM were predicted to be shallower and located farther from sand surfaces with increasing IS due to the hydration force. Consequently, a greater amount of colloid detachment occurred in deionized water when the colloids were initially deposited at a higher IS. Atomic force microscopy (AFM) examinations showed that both nanoscale protruding asperities and large wedge-like valleys existed on the sand surface. The influence of these surface features on the interaction energies/forces was modeled by approximating the roughness as cosinoidal waves and two intersecting half planes, respectively. The PM were deep and attachment was irreversible at concave regions for all ISs, even if the hydration force was included. Conversely, colloids were weakly attached at protruding asperities due to a reduced PM depth, and thus were responsible for the detachment upon IS reduction. The AFM examinations confirmed that the adhesive forces were enhanced and reduced (or even completely eliminated) at concave and convex locations of sand surfaces, respectively. These results have important implications for surface cleaning and prediction of the transport and fate of hazardous colloids and colloid-associated contaminants in subsurface environments.
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Affiliation(s)
- Tiantian Li
- Department of Soil and Water Sciences, China Agricultural University, Beijing, 100193, China
| | - Chongyang Shen
- Department of Soil and Water Sciences, China Agricultural University, Beijing, 100193, China.
| | - Sen Wu
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin, 300072, China
| | - Chao Jin
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, Guangdong, 510006, China
| | - Scott A Bradford
- USDA, ARS, U.S. Salinity Laboratory, Riverside, CA, 92507-4617, United States.
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27
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Liu C, Ou Z, Guo F, Luo B, Chen W, Qi L, Chen Q. "Colloid-Atom Duality" in the Assembly Dynamics of Concave Gold Nanoarrows. J Am Chem Soc 2020; 142:11669-11673. [PMID: 32543864 DOI: 10.1021/jacs.0c04444] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We use liquid-phase transmission electron microscopy (TEM) to study self-assembly dynamics of charged gold nanoarrows (GNAs), which reveal an unexpected "colloid-atom duality". On one hand, they assemble following the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory for colloids when van der Waals attraction overruns slightly screened electrostatic repulsion. Due to concaveness in shape, GNAs adopt zipper motifs with lateral offset in their assembly matching with our modeling of inter-GNA interaction, which form into unconventional structures resembling degenerate crystals. On the other hand, further screening of electrostatic repulsion leads to merging of clusters assembled from GNAs, reminiscent of the coalescence growth mode in atomic crystals driven by minimization of surface energy, as we measure from the surface fluctuation of clusters. Liquid-phase TEM captures the initial formation of highly curved necks bridging the two clusters. Analysis of the real-time evolution of neck width illustrates the first-time observation of coalescence in colloidal assemblies facilitated by rapid surface diffusion of GNAs. We attribute the duality to the confluence of factors (e.g., nanoscale colloidal interaction, diffusional dynamics) that we access by liquid-phase TEM, taking turns to dominate at different conditions, which is potentially generic to the nanoscale. The atom aspect, in particular, can inspire utilization of atomic crystal synthesis strategies to encode structure and dynamics in nanoscale assembly.
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Affiliation(s)
| | | | - Fucheng Guo
- Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China
| | | | | | - Limin Qi
- Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China
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28
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Fernando I, Tay YY, Karunasekera H, Zhou Y. Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy. Anal Chim Acta 2020; 1104:47-52. [PMID: 32106956 DOI: 10.1016/j.aca.2019.12.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/06/2019] [Accepted: 12/30/2019] [Indexed: 10/25/2022]
Abstract
The properties of the solution matrix play a prominent role in determining the interactions between the silver nanoparticles (AgNPs) when they are present in the aquatic environment. Here, using in situ liquid cell transmission electron microscopy (LCTEM), we show that the interaction of AgNPs is predominantly affected by the solution pH. Reducing the pH in the solution will accelerate the aggregation of AgNPs due to the alteration of the charge cloud around the NPs. Aggregates formed in this scenario were non spherical and irregular shaped and were stable under the electron beam irradiation. Individual AgNPs and smaller aggregates moved randomly and approached the larger aggregates before the aggregation process came to an end. We found that during the aggregation process, the mode of jump to contact and the pairwise approach of aggregation differed according to the composition of the solution. Observations made using the LCTEM were further explained using empirical formulae. Our observation on the pH induced interactions provides important insights on predicting the behavior of AgNPs released through many anthropogenic activities in the environment.
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Affiliation(s)
- Ishara Fernando
- Interdisciplinary Graduate School, Nanyang Technological University, 639798, Singapore; Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore
| | - Yee Yan Tay
- Facility for Analysis, Characterization, Testing and Simulation, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; School of Materials Science and Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Hasith Karunasekera
- School of Electrical & Electronic Engineering, College of Engineering, Nanyang Technological University, 639798, Singapore
| | - Yan Zhou
- Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore; School of Civil & Environmental Engineering, College of Engineering, Nanyang Technological University, 639798, Singapore.
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29
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Guo P, Gao Y. Coalescence of Au Nanoparticles without Ligand Detachment. PHYSICAL REVIEW LETTERS 2020; 124:066101. [PMID: 32109082 DOI: 10.1103/physrevlett.124.066101] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 11/07/2019] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
Repulsion of ligands is known as the key factor for hindering nanoparticle (NP) coalescence. Thus, during the past decade, it has generally accepted that the full removal of capping ligands of the contact surface is the first step for NP coalescence. Herein, using molecular dynamics simulations, we have identified a new mechanism for the coalescence of S(CH_{2})_{n}COOH-coated Au NPs in water without ligand detachment. In contrast to the traditional mechanism, the aggregation of the NPs is induced by the twined hydrophobic chains of the ligands rather than the hydrophilic carboxyl tails as believed previously. Next, the exposed surface atoms attach to form the neck, and extend with the atomic rearrangement of the contact interface to merge the NPs, which do not need the removal of ligands as expected from traditional supposition. This finding refreshes the understanding of the atomic mechanism of the coalescence of NPs, which paves the way for the rational design and synthesis of NPs.
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Affiliation(s)
- Pan Guo
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
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30
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Jun Y, Xu J, Kim H, Park JE, Jeong YS, Min JS, Yoon N, Choi JY, Yoo J, Bae SK, Chung SJ, Yeo Y, Lee W. Carfilzomib Delivery by Quinic Acid-Conjugated Nanoparticles: Discrepancy Between Tumoral Drug Accumulation and Anticancer Efficacy in a Murine 4T1 Orthotopic Breast Cancer Model. J Pharm Sci 2020; 109:1615-1622. [PMID: 31945310 DOI: 10.1016/j.xphs.2020.01.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 11/07/2019] [Accepted: 01/07/2020] [Indexed: 12/26/2022]
Abstract
Despite being a major breakthrough in multiple myeloma therapy, carfilzomib (CFZ, a second-generation proteasome inhibitor drug) has been largely ineffective against solid cancer, possibly due to its pharmacokinetic drawbacks including metabolic instability. Recently, quinic acid (QA, a low-affinity ligand of selectins upregulated in peritumoral vasculature) was successfully utilized as a surface modifier for nanoparticles containing paclitaxel. Here, we designed QA-conjugated nanoparticles containing CFZ (CFZ@QANP; the surface of poly(lactic-co-glycolic acid) nanoparticles modified by conjugation with a QA derivative). Compared to the clinically used cyclodextrin-based formulation (CFZ-CD), CFZ@QANP enhanced the metabolic stability and in vivo exposure of CFZ in mice. CFZ@QANP, however, showed little improvement in suppressing tumor growth over CFZ-CD against the murine 4T1 orthotopic breast cancer model. CFZ@QANP yielded no enhancement in proteasomal inhibition in excised tumors despite having a higher level of remaining CFZ than CFZ-CD. These results likely arise from delayed, incomplete CFZ release from CFZ@QANP as observed using biorelevant media in vitro. These results suggest that the applicability of QANP may not be predicted by physicochemical parameters commonly used for formulation design. Our current results highlight the importance of considering drug release kinetics in designing effective CFZ formulations for solid cancer therapy.
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Affiliation(s)
- Yearin Jun
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Jun Xu
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Hyungjun Kim
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Ji Eun Park
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Yoo-Seong Jeong
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Jee Sun Min
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, Catholic University of Korea, Bucheon, South Korea
| | - Naeun Yoon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Ji Yoon Choi
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Jisu Yoo
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Soo Kyung Bae
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, Catholic University of Korea, Bucheon, South Korea
| | - Suk-Jae Chung
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Yoon Yeo
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Wooin Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea.
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31
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Wang H, Zhou X, Huang Y, Chen X, Jin C. Interactions of sub-five-nanometer diameter colloidal palladium nanoparticles in solution investigated via liquid cell transmission electron microscopy. RSC Adv 2020; 10:34781-34787. [PMID: 35514409 PMCID: PMC9056814 DOI: 10.1039/d0ra05759b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 09/14/2020] [Indexed: 11/21/2022] Open
Abstract
Inter-particle interactions play important roles in controlling the structures, dispersion state and chemo-physical properties of colloidal nanoparticles (NPs) in liquid media. In this work, we prepared palladium (Pd) NPs with an average diameter of ∼4.6 nm in situ inside the liquid cell, and investigated their coupled diffusion and aggregation behaviors through liquid cell transmission electron microscopy (LCTEM). Via analyzing the interaction energies and forces, we derived the effective working range for repulsive double layer interaction experimentally, a value larger than two times the Debye length, suggesting a different interaction behavior of sub-5 nm NPs from that of colloidal NPs in larger sizes. Our results provide insights for the interactions between colloidal ultrafine nanoparticles in solution and will also shed light on the precisely controlled assembly of colloidal nanocrystals for practical applications. In this paper, sub-5 nm diameter palladium nanoparticles were prepared in situ inside the liquid cell, and the interactions between them were investigated via liquid cell transmission electron microscopy.![]()
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Affiliation(s)
- Haifeng Wang
- Institute of New Energy for Vehicles
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- China
| | - Xiaoqin Zhou
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou
- China
| | - Yunhui Huang
- Institute of New Energy for Vehicles
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- China
| | - Xin Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education
- Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Chuanhong Jin
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou
- China
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32
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Affiliation(s)
- Jim De Yoreo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
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33
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Affiliation(s)
- Peter G. Vekilov
- Department of Chemical and Biomolecular Engineering and Department of Chemistry, University of Houston, Houston, Texas 77204, United States
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34
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Lin W, Klein J. Control of surface forces through hydrated boundary layers. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.10.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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35
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Jiang S, Mou Y, He H, Yang D, Qin L, Zhang F, Zhang P. Preparation and evaluation of self-assembly Soluplus®-sodium cholate-phospholipid ternary mixed micelles of docetaxel. Drug Dev Ind Pharm 2019; 45:1788-1798. [DOI: 10.1080/03639045.2019.1660365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shanshan Jiang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, China
| | - Yanhua Mou
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Huiyang He
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, China
| | - Dandan Yang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, China
| | - Li Qin
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, China
| | - Fang Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, China
| | - Peng Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, China
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36
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Lee J, Nakouzi E, Xiao D, Wu Z, Song M, Ophus C, Chun J, Li D. Interplay between Short- and Long-Ranged Forces Leading to the Formation of Ag Nanoparticle Superlattice. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901966. [PMID: 31225719 DOI: 10.1002/smll.201901966] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 05/20/2019] [Indexed: 06/09/2023]
Abstract
Nanoparticle (NP) superlattices have attracted increasing attention due to their unique physicochemical properties. However, key questions persist regarding the correlation between short- and long-range driving forces for nanoparticle assembly and resultant capability to predict the transient and final superlattice structure. Here the self-assembly of Ag NPs in aqueous solutions is investigated by employing in situ liquid cell transmission electron microscopy, combined with atomic force microscopy-based force measurements, and theoretical calculations. Despite the NPs exhibiting instantaneous Brownian motion, it is found that the dynamic behavior of NPs is correlated with the van der Waals force, sometimes unexpectedly over relatively large particle separations. After the NPs assemble into clusters, a delicate balance between the hydration and van der Waals forces results in a distinct distribution of particle separation, which is ascribed to layers of hydrated ions adsorbed on the NP surface. The study demonstrates pivotal roles of the complicated correlation between interparticle forces; potentially enabling the control of particle separation, which is critical for tailoring the properties of NP superlattices.
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Affiliation(s)
- Jaewon Lee
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Elias Nakouzi
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Dongdong Xiao
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Zhigang Wu
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
- School of Science, North University of China, Taiyuan, 030051, P. R. China
| | - Miao Song
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Colin Ophus
- NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jaehun Chun
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
- Benjamin Levich Institute, CUNY City College of New York, New York, NY, 10031, USA
| | - Dongsheng Li
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
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Kumar S, Ray D, Abbas S, Saha D, Aswal VK, Kohlbrecher J. Reentrant phase behavior of nanoparticle solutions probed by small-angle scattering. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.02.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Modena MM, Rühle B, Burg TP, Wuttke S. Nanoparticle Characterization: What to Measure? ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1901556. [PMID: 31148285 DOI: 10.1002/adma.201901556] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/19/2019] [Indexed: 05/20/2023]
Abstract
What to measure? is a key question in nanoscience, and it is not straightforward to address as different physicochemical properties define a nanoparticle sample. Most prominent among these properties are size, shape, surface charge, and porosity. Today researchers have an unprecedented variety of measurement techniques at their disposal to assign precise numerical values to those parameters. However, methods based on different physical principles probe different aspects, not only of the particles themselves, but also of their preparation history and their environment at the time of measurement. Understanding these connections can be of great value for interpreting characterization results and ultimately controlling the nanoparticle structure-function relationship. Here, the current techniques that enable the precise measurement of these fundamental nanoparticle properties are presented and their practical advantages and disadvantages are discussed. Some recommendations of how the physicochemical parameters of nanoparticles should be investigated and how to fully characterize these properties in different environments according to the intended nanoparticle use are proposed. The intention is to improve comparability of nanoparticle properties and performance to ensure the successful transfer of scientific knowledge to industrial real-world applications.
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Affiliation(s)
- Mario M Modena
- ETH Zurich, Department of Biosystems Science and Engineering, Mattenstrasse 26, 4058, Basel, BS, Switzerland
| | - Bastian Rühle
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter - Str 11, 12489, Berlin, Germany
| | - Thomas P Burg
- Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
- Department of Electrical Engineering and Information Technology, Technische Universität Darmstadt, Merckstrasse 25, 64283, Darmstadt, Germany
| | - Stefan Wuttke
- Department of Chemistry, Center for NanoScience (CeNS), University of Munich (LMU), 81377, Munich, Germany
- BCMaterials, Basque Center for Materials, UPV/EHU Science Park, 48940, Leioa, Spain
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Su T, Wang ZL, Wang Z. In Situ Observations of Shell Growth and Oxidative Etching Behaviors of Pd Nanoparticles in Solutions by Liquid Cell Transmission Electron Microscopy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900050. [PMID: 30844138 DOI: 10.1002/smll.201900050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/03/2019] [Indexed: 05/25/2023]
Abstract
It is demonstrated that the redox reaction behaviors of Pd nanoparticles in HAuCl4 solutions can be substantially modified by the introduction of hexadecyl trimethyl ammonium bromide (CTAB) agents through systematic liquid cell transmission electron microscopy (LCTEM) investigations. The gradual dissolution of Pd nanoparticles is observed when HAuCl4 solution is pumped into liquid flow cells, the etching characteristics of which are depended on both HAuCl4 concentrations and incident electron doses. In comparison, with the presence of CTAB agents, the dominated phenomenon appears to be the precipitation of Au species and incorporation onto the surface of Pd seeds. It is also observed that the rapid growth of Au on Pd seeds occurs by loading Pd and HAuCl4 solutions into static liquid cells. The resultant Au shells exhibit rather sparse structural configurations and are formed possibly by homogeneous nucleation/coalescence of Au species as well as monomer attachments. The observed Au-shell growth instead of Pd dissolution is attributed to the presence of the residual regents, which may be also responsible for the initially already existing small Au adsorptions at the corner/edge sites of Pd seeds. The study provides a useful reference for the convenient fabrication of complex nanostructures and functional nanomaterials in a controllable way.
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Affiliation(s)
- Ting Su
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Zhiwei Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
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Jin B, Wang Y, Liu Z, France-Lanord A, Grossman JC, Jin C, Tang R. Revealing the Cluster-Cloud and Its Role in Nanocrystallization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1808225. [PMID: 30847959 DOI: 10.1002/adma.201808225] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/21/2019] [Indexed: 05/18/2023]
Abstract
Elucidating the early stages of crystallization from supersaturated solutions is of critical importance, but remains a great challenge. An in situ liquid cell transmission electron microscopy study reveals an intermediate state of condensed atomic clusters during Pd and Au crystallizations, which is named a "cluster-cloud." It is found that nucleation is initiated by the collapse of a cluster-cloud, first forming a nanoparticle. The subsequent particle maturation proceeds via multiple out-and-in relaxations of the cluster-cloud to improve crystallinity: from a poorly crystallized phase, the particle evolves into a well-defined single-crystal phase. Both experimental investigations and atomistic simulations suggest that the cluster-cloud-mediated nanocrystallization involves an order-disorder phase separation and reconstruction, which is energetically favored compared to local rearrangements within the particle. This finding grants new insights into nanocrystallization mechanisms, and provides useful information for the improvement of synthesis pathways of nanocrystals.
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Affiliation(s)
- Biao Jin
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Yanming Wang
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Zhaoming Liu
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Arthur France-Lanord
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Jeffrey C Grossman
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Chuanhong Jin
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Ruikang Tang
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China
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Jin B, Liu Z, Tang R, Jin C. Quantitative investigation of the formation and growth of palladium fractal nanocrystals by liquid-cell transmission electron microscopy. Chem Commun (Camb) 2019; 55:8186-8189. [DOI: 10.1039/c9cc03161h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Liquid-cell transmission electron microscopy reveals the early formation stage of fractal nanocrystals and the effects of supersaturation on their growth dynamics.
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Affiliation(s)
- Biao Jin
- Department of Chemistry
- Zhejiang University
- Zhejiang 310027
- P. R. China
| | - Zhaoming Liu
- Department of Chemistry
- Zhejiang University
- Zhejiang 310027
- P. R. China
| | - Ruikang Tang
- Department of Chemistry
- Zhejiang University
- Zhejiang 310027
- P. R. China
| | - Chuanhong Jin
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Zhejiang 310027
- P. R. China
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Wu Y, Chen X, Li C, Fang J, Liu H. In situliquid cell TEM observation of solution-mediated interaction behaviour of Au/CdS nanoclusters. NEW J CHEM 2019. [DOI: 10.1039/c9nj03520f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Near a thicker liquid region, droplets grow and become overlap-like, liquid fronts push forward to facilitate NC coalescence. In a thin liquid region, e-beam induces bubble formation, dissolution of CdS, and deformation of the Au/CdS composite.
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Affiliation(s)
- Yulian Wu
- Key Laboratory for Ultrafine Materials of Ministry of Education, and Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xin Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, and Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Chang Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, and Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Jiali Fang
- Key Laboratory for Ultrafine Materials of Ministry of Education, and Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Haiyang Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, and Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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Anovitz LM, Zhang X, Soltis J, Nakouzi E, Krzysko AJ, Chun J, Schenter GK, Graham TR, Rosso KM, De Yoreo JJ, Stack AG, Bleuel M, Gagnon C, Mildner DFR, Ilavsky J, Kuzmenko I. Effects of Ionic Strength, Salt, and pH on Aggregation of Boehmite Nanocrystals: Tumbler Small-Angle Neutron and X-ray Scattering and Imaging Analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15839-15853. [PMID: 30350702 PMCID: PMC11024987 DOI: 10.1021/acs.langmuir.8b00865] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The US government currently spends significant resources managing the legacies of the Cold War, including 300 million liters of highly radioactive wastes stored in hundreds of tanks at the Hanford (WA) and Savannah River (SC) sites. The materials in these tanks consist of highly radioactive slurries and sludges at very high pH and salt concentrations. The solid particles primarily consist of aluminum hydroxides and oxyhydroxides (gibbsite and boehmite), although many other materials are present. These form complex aggregates that dramatically affect the rheology of the solutions and, therefore, efforts to recover and treat these wastes. In this paper, we have used a combination of transmission and cryo-transmission electron microscopy, dynamic light scattering, and X-ray and neutron small and ultrasmall-angle scattering to study the aggregation of synthetic nanoboehmite particles at pH 9 (approximately the point of zero charge) and 12, and sodium nitrate and calcium nitrate concentrations up to 1 m. Although the initial particles form individual rhombohedral platelets, once placed in solution they quickly form well-bonded stacks, primary aggregates, up to ∼1500 Å long. These are more prevalent at pH = 12. Addition of calcium nitrate or sodium nitrate has a similar effect as lowering pH, but approximately 100 times less calcium than sodium is needed to observe this effect. These aggregates have fractal dimension between 2.5 and 2.6 that are relatively unaffected by salt concentration for calcium nitrate at high pH. Larger aggregates (>∼4000 Å) are also formed, but their size distributions are discrete rather than continuous. The fractal dimensions of these aggregates are strongly pH-dependent, but only become dependent on solute at high concentrations.
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Affiliation(s)
- L. M. Anovitz
- Chemical Sciences Division, Oak Ridge National Laboratory, MS 6110, Oak Ridge, Tennessee 37831-6110, United States
| | - X. Zhang
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - J. Soltis
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - E. Nakouzi
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - A. J. Krzysko
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - J. Chun
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - G. K. Schenter
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - T. R. Graham
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - K. M. Rosso
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - J. J. De Yoreo
- Physical Sciences Division. Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - A. G. Stack
- Chemical Sciences Division, Oak Ridge National Laboratory, MS 6110, Oak Ridge, Tennessee 37831-6110, United States
| | - M. Bleuel
- Center for Neutron Research, National Institute of Standards and Technology, Stop 6102, Gaithersburg, Maryland 20889-6102, United States
- Department of Materials Science and Eng. J. Clark School of Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - C. Gagnon
- Center for Neutron Research, National Institute of Standards and Technology, Stop 6102, Gaithersburg, Maryland 20889-6102, United States
- Department of Materials Science and Eng. J. Clark School of Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - D. F. R. Mildner
- Center for Neutron Research, National Institute of Standards and Technology, Stop 6102, Gaithersburg, Maryland 20889-6102, United States
| | - J. Ilavsky
- Argonne National Laboratory, 9700 S. Cass Avenue, Bldg. 433A, Argonne, Illinois 60439, United States
| | - I. Kuzmenko
- Argonne National Laboratory, 9700 S. Cass Avenue, Bldg. 433A, Argonne, Illinois 60439, United States
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Kang H, Buchman JT, Rodriguez RS, Ring HL, He J, Bantz KC, Haynes CL. Stabilization of Silver and Gold Nanoparticles: Preservation and Improvement of Plasmonic Functionalities. Chem Rev 2018; 119:664-699. [DOI: 10.1021/acs.chemrev.8b00341] [Citation(s) in RCA: 258] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hyunho Kang
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Joseph T. Buchman
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Rebeca S. Rodriguez
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Hattie L. Ring
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Jiayi He
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Kyle C. Bantz
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Christy L. Haynes
- Department of Chemistry, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
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46
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Jin B, Sushko ML, Liu Z, Jin C, Tang R. In Situ Liquid Cell TEM Reveals Bridge-Induced Contact and Fusion of Au Nanocrystals in Aqueous Solution. NANO LETTERS 2018; 18:6551-6556. [PMID: 30188138 DOI: 10.1021/acs.nanolett.8b03139] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
During nanoparticle coalescence in aqueous solution, dehydration and initial contact of particles are critically important but poorly understood processes. In this work, we used in situ liquid-cell transmission electron microscopy to directly visualize the coalescence process of Au nanocrystals. It is found that the Au atomic nanobridge forms between adjacent nanocrystals that are separated by a ∼0.5 nm hydration layer. The nanobridge structure first induces initial contact of Au nanocrystals over their hydration layers and then surface diffusion and grain boundary migration to rearrange into a single nanocrystal. Classical density functional theory calculations and ab initio molecular dynamics simulations suggest that the formation of the nanobridge can be attributed to the accumulation of auric ions and a higher local supersaturation in the gap, which can promote dehydration, contact, and fusion of Au nanocrystals. The discovery of this multistep process advances our understanding of the nanoparticle coalescence mechanism in aqueous solutions.
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Affiliation(s)
| | - Maria L Sushko
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
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Hyun H, Park J, Willis K, Park JE, Lyle LT, Lee W, Yeo Y. Surface modification of polymer nanoparticles with native albumin for enhancing drug delivery to solid tumors. Biomaterials 2018; 180:206-224. [PMID: 30048910 PMCID: PMC6076859 DOI: 10.1016/j.biomaterials.2018.07.024] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 01/09/2023]
Abstract
Albumin is a promising surface modifier of nanoparticulate drug delivery systems. Serving as a dysopsonin, albumin can protect circulating nanoparticles (NPs) from the recognition and clearance by the mononuclear phagocytic system (MPS). Albumin may also help transport the NPs to solid tumors based on the increased consumption by cancer cells and interactions with the tumor microenvironment. Several studies have explored the benefits of surface-bound albumin to enhance NP delivery to tumors. However, it remains unknown how the surface modification process affects the conformation of albumin and the performance of the albumin-modified NPs. We use three different surface modification methods including two prevalent approaches (physisorption and interfacial embedding) and a new method based on dopamine polymerization to modify the surface of poly(lactic-co-glycolic acid) NPs with albumin and compare the extent of albumin binding, conformation of the surface-bound albumin, and biological performances of the albumin-coated NPs. We find that the dopamine polymerization method preserves the albumin structure, forming a surface layer that facilitates NP transport and drug delivery into tumors via the interaction with albumin-binding proteins. In contrast, the interfacial embedding method creates NPs with denatured albumin that offers no particular benefit to the interaction with cancer cells but rather promotes the MPS uptake via direct and indirect interactions with scavenger receptor A. This study demonstrates that the surface-bound albumin can bring distinct effects according to the way they interact with NP surface and thus needs to be controlled in order to achieve favorable therapeutic outcomes.
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Affiliation(s)
- Hyesun Hyun
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN, 47907, USA
| | - Joonyoung Park
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN, 47907, USA
| | - Kiela Willis
- School of Chemical Engineering, Purdue University, 480 West Stadium Avenue, West Lafayette, IN, 47907, USA
| | - Ji Eun Park
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - L Tiffany Lyle
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, 47907, USA
| | - Wooin Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Yoon Yeo
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN, 47907, USA; Weldon School of Biomedical Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, IN, 47907, USA.
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Kessi J, Hörtensteiner S. Inhibition of bacteriochlorophyll biosynthesis in the purple phototrophic bacteria Rhodospirillumrubrum and Rhodobacter capsulatus grown in the presence of a toxic concentration of selenite. BMC Microbiol 2018; 18:81. [PMID: 30064359 PMCID: PMC6069883 DOI: 10.1186/s12866-018-1209-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 06/27/2018] [Indexed: 11/21/2022] Open
Abstract
Background In many works, the chemical composition of bacterially-produced elemental selenium nanoparticles (Se0-nanoparticles) was investigated using electron dispersive X-ray analysis. The results suggest that these particles should be associated with organic compounds. However, a complete analysis of their chemical composition is still missing. Aiming at identifying organic compounds associated with the Se0-nanoparticles produced by the purple phototrophic bacteria Rhodospirillum rubrum and Rhodobacter capsulatus (α group of the proteobacteria), we used MALDI-TOF spectrometry.Results This technic revealed that numerous signals obtained from particles produced by both species of bacteria were from metabolites of the photosynthetic system. Furthermore, not only bacteriochlorophyll a, bacteriopheophytin a, and bacteriopheophorbide a, which are known to accumulate in stationary phase cultures of these bacteria grown phototrophically in the absence of selenite, were identified. The particles were also associated with intermediary metabolites of the bacteriochlorophyll a biosynthesis pathway such as protoporphyrin IX, protoporphyrin IX monomethyl ester, bacteriochlorophyllide a and, most likely, Mg-protoporphyrin IX-monomethyl ester, as well as with oxidation products of the substrates of protochlorophyllide reductase and chlorin reductase.Conclusion Accumulation of intermediary metabolites of the bacteriochlorophyll biosynthesis pathway in these purple phototrophic bacteria was attributed to inhibition of oxygen-sensitive enzymes involved in this pathway. Consistent with this interpretation it has been reported that these bacteria reduce selenite intracellularly, that they contain high levels of glutathione and that the reduction of selenite with glutathione is a very fast reaction accompanied by the production of reactive oxygen species. As many enzymes involved in the biosynthesis of bacteriochlorophyll contain [Fe-S] clusters in their active site, which are known to be degraded in the presence of reactive oxygen species as well as in the presence of molecular oxygen, we concluded that the substrates of these enzymes accumulate in cells during selenite reduction.Association of metabolites of bacteriochlorophyll biosynthesis and degradation with the Se0-nanoparticles produced by Rhodospirillum rubrum and Rhodobacter capsulatus is proposed to result from coating of the nanoparticles with the intracytoplasmic membrane of these bacteria, where the photochemical apparatus is concentrated.
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Affiliation(s)
- Janine Kessi
- Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, Zurich, 8008 Switzerland
- Kirschenweg 10, Würenlingen, 5303 Switzerland
| | - Stefan Hörtensteiner
- Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, Zurich, 8008 Switzerland
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Du JS, Chen PC, Meckes B, Kluender EJ, Xie Z, Dravid VP, Mirkin CA. Windowless Observation of Evaporation-Induced Coarsening of Au-Pt Nanoparticles in Polymer Nanoreactors. J Am Chem Soc 2018; 140:7213-7221. [PMID: 29856627 PMCID: PMC8243569 DOI: 10.1021/jacs.8b03105] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The interactions between nanoparticles and solvents play a critical role in the formation of complex, metastable nanostructures. However, direct observation of such interactions with high spatial and temporal resolution is challenging with conventional liquid-cell transmission electron microscopy (TEM) experiments. Here, a windowless system consisting of polymer nanoreactors deposited via scanning probe block copolymer lithography (SPBCL) on an amorphous carbon film is used to investigate the coarsening of ultrafine (1-3 nm) Au-Pt bimetallic nanoparticles as a function of solvent evaporation. In such reactors, homogeneous Au-Pt nanoparticles are synthesized from metal-ion precursors in situ under electron irradiation. The nonuniform evaporation of the thin polymer film not only concentrates the nanoparticles but also accelerates the coalescence kinetics at the receding polymer edges. Qualitative analysis of the particle forces influencing coalescence suggests that capillary dragging by the polymer edges plays a significant role in accelerating this process. Taken together, this work (1) provides fundamental insight into the role of solvents in the chemistry and coarsening behavior of nanoparticles during the synthesis of polyelemental nanostructures, (2) provides insight into how particles form via the SPBCL process, and (3) shows how SPBCL-generated domes, instead of liquid cells, can be used to study nanoparticle formation. More generally, it shows why conventional models of particle coarsening, which do not take into account solvent evaporation, cannot be used to describe what is occurring in thin film, liquid-based syntheses of nanostructures.
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Affiliation(s)
- Jingshan S. Du
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Peng-Cheng Chen
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Brian Meckes
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Edward J. Kluender
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Zhuang Xie
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Vinayak P. Dravid
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Chad A. Mirkin
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
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50
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Alavi Z, Zocchi G. Dissipation at the angstrom scale: Probing the surface and interior of an enzyme. Phys Rev E 2018; 97:052402. [PMID: 29906977 DOI: 10.1103/physreve.97.052402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Indexed: 06/08/2023]
Abstract
Pursuing a materials science approach to understanding the deformability of enzymes, we introduce measurements of the phase of the mechanical response function within the nanorheology paradigm. Driven conformational motion of the enzyme is dissipative as characterized by the phase measurements. The dissipation originates both from the surface hydration layer and the interior of the molecule, probed by examining the effect of point mutations on the mechanics. We also document changes in the mechanics of the enzyme examined, guanylate kinase, upon binding its four substrates. GMP binding stiffens the molecule, ATP and ADP binding softens it, while there is no clear mechanical signature of GDP binding. A hyperactive two-Gly mutant is found to possibly trade specificity for speed. Global deformations of enzymes are shown to be dependent on both hydration layer and polypeptide chain dynamics.
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Affiliation(s)
- Zahra Alavi
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
- Department of Physics and Astronomy, Loyola Marymount University Los Angeles, Los Angeles, California 90095, USA
| | - Giovanni Zocchi
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
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