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Li S, Ai R, Chui KK, Fang Y, Lai Y, Zhuo X, Shao L, Wang J, Lin HQ. Routing the Exciton Emissions of WS 2 Monolayer with the High-Order Plasmon Modes of Ag Nanorods. Nano Lett 2023; 23:4183-4190. [PMID: 37158482 DOI: 10.1021/acs.nanolett.3c00054] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Locally routing the exciton emissions in two-dimensional (2D) transition-metal dichalcogenides along different directions at the nanophotonic interface is of great interest in exploiting the promising 2D excitonic systems for functional nano-optical components. However, such control has remained elusive. Herein we report on a facile plasmonic approach for electrically controlled spatial modulation of the exciton emissions in a WS2 monolayer. The emission routing is enabled by the resonance coupling between the WS2 excitons and the multipole plasmon modes in individual silver nanorods placed on a WS2 monolayer. Different from prior demonstrations, the routing effect can be modulated by the doping level of the WS2 monolayer, enabling electrical control. Our work takes advantage of the high-quality plasmon modes supported by simple rod-shaped metal nanocrystals for the angularly resolved manipulation of 2D exciton emissions. Active control is achieved, which offers great opportunities for the development of nanoscale light sources and nanophotonic devices.
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Affiliation(s)
- Shasha Li
- Beijing Computational Science Research Center, Beijing 100193, People's Republic of China
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, People's Republic of China
| | - Ruoqi Ai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, People's Republic of China
| | - Ka Kit Chui
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, People's Republic of China
| | - Yini Fang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, People's Republic of China
| | - Yunhe Lai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, People's Republic of China
| | - Xiaolu Zhuo
- School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, People's Republic of China
| | - Lei Shao
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, People's Republic of China
| | - Hai-Qing Lin
- Beijing Computational Science Research Center, Beijing 100193, People's Republic of China
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2
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Marcone J, Chaâbani W, Goldmann C, Impéror-Clerc M, Constantin D, Hamon C. Polymorphous Packing of Pentagonal Nanoprisms. Nano Lett 2023; 23:1337-1342. [PMID: 36763510 DOI: 10.1021/acs.nanolett.2c04541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Packing solid shapes into regular lattices can yield very complex assemblies, not all of which achieve the highest packing fraction. In two dimensions, the regular pentagon is paradigmatic, being the simplest shape that does not pave the plane completely. In this work, we demonstrate the packing of plasmonic nanoprisms with pentagonal cross section, which form extended supercrystals. We do encounter the long-predicted ice-ray and Dürer packings (with packing fractions of 0.921 and 0.854, respectively) but also a variety of novel polymorphs that can be obtained from these two configurations by a continuous sliding transformation and exhibit an intermediate packing fraction. Beyond the fundamental interest of this result, fine control over the density and symmetry of such plasmonic assemblies opens the perspective of tuning their optical properties, with potential applications in metamaterial fabrication, catalysis, or molecular detection.
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Affiliation(s)
- Jules Marcone
- Laboratoire de Physique des Solides, CNRS and Université Paris-Saclay, 91400 Orsay, France
| | - Wajdi Chaâbani
- Laboratoire de Physique des Solides, CNRS and Université Paris-Saclay, 91400 Orsay, France
| | - Claire Goldmann
- Laboratoire de Physique des Solides, CNRS and Université Paris-Saclay, 91400 Orsay, France
| | - Marianne Impéror-Clerc
- Laboratoire de Physique des Solides, CNRS and Université Paris-Saclay, 91400 Orsay, France
| | - Doru Constantin
- Institut Charles Sadron, CNRS and Université de Strasbourg, 67034 Strasbourg, France
| | - Cyrille Hamon
- Laboratoire de Physique des Solides, CNRS and Université Paris-Saclay, 91400 Orsay, France
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Zámbó D, Rusch P, Lübkemann F, Bigall NC. Noble-Metal Nanorod Cryoaerogels with Electrocatalytically Active Surface Sites. ACS Appl Mater Interfaces 2021; 13:57774-57785. [PMID: 34813701 PMCID: PMC8662650 DOI: 10.1021/acsami.1c16424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Noble-metal-based electrocatalysts usually contain small nanoparticle building blocks to ensure a high specific surface area as the scene for the surface processes. Here, we show that relatively large noble-metal nanorods are also promising candidates to build up functional macrostructures with prominent electrocatalytic activity. After optimizing and upscaling the syntheses of gold nanorods and gold bipyramid-templated silver nanorods, cryoaerogels are fabricated on a conductive substrate via flash freezing and subsequent freeze drying. The versatile cryoaerogelation technique allows the formation of macrostructures with dendritic, open-pore structure facilitating the increase of the accessible nanorod surfaces. It is demonstrated via electrochemical oxidation and stripping test experiments that noble-metal surface sites are electrochemically active in redox reactions. Furthermore, gold nanorod cryoaerogels offer a platform for redox sensing, ethanol oxidation reaction, as well as glucose sensing. Compared to their simply drop-cast and dried counterparts, the noble-metal nanorod cryoaerogels offer enhanced activity due to the open porosity of the fabricated nanostructure while maintaining structural stability.
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Affiliation(s)
- Dániel Zámbó
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
- Centre
for Energy Research, Institute of Technical
Physics and Materials Science, Konkoly-Thege M. str. 29-33, 1121 Budapest, Hungary
| | - Pascal Rusch
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
| | - Franziska Lübkemann
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
| | - Nadja C. Bigall
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
- Cluster
of Excellence PhoenixD (Photonics, Optics and Engineering −
Innovation Across Disciplines), Leibniz
Universität Hannover, 30167 Hanover, Germany
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4
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Wu X, Zhao Y, Zughaier SM. Highly Sensitive Detection and Differentiation of Endotoxins Derived from Bacterial Pathogens by Surface-Enhanced Raman Scattering. Biosensors (Basel) 2021; 11:234. [PMID: 34356705 DOI: 10.3390/bios11070234] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 11/18/2022]
Abstract
Bacterial endotoxins, as major components of Gram-negative bacterial outer membrane leaflets and a well-characterized TLR4-MD-2 ligand, are lipopolysaccharides (LPSs) that are constantly shed from bacteria during growth and infection. For the first time, we report that unique surface-enhanced Raman scattering (SERS) spectra of enteric LPSs from E. coli, S. typhimurium, S. minnesota, V. cholerae, Rhizobium species R. CE3, and R. NGR, as well as Neisseria meningitidis endotoxin structures, LPSs, lipid A, and KDO2-lipid A can be obtained. The characteristic peaks of the SERS spectra reveal that most of the tested LPS structures are from lipids and saccharides, i.e., the major components of LPSs, and these spectra can be successfully used to differentiate between endotoxins with principal components analysis. In addition, all the LPS samples here are measured at a concentration of 10 nmole/mL, which corresponds to their relevant pathophysiological concentrations in clinical infections. This study demonstrates that LPSs can be used as biomarkers for the highly sensitive detection of bacteria using SERS-based methods.
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Durairaj K, Roy B, Chandrasekaran N, Krishnan SP, Mukherjee A. Silver nanorods induced oxidative stress and chromosomal aberrations in the Allium cepa model. IET Nanobiotechnol 2020; 14:161-166. [PMID: 32433034 PMCID: PMC8675964 DOI: 10.1049/iet-nbt.2019.0224] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 09/22/2019] [Accepted: 11/20/2019] [Indexed: 10/26/2023] Open
Abstract
The production of different size and shape silver nanoparticles (AgNPs) has increased considerably in recent years due to several commercial and biological applications. Here, rod-shaped AgNPs (SNRs) were prepared using the microwave-assisted method and characterised by ultraviolet-visible spectroscopy, and transmission electron microscopy analysis. The present study aims to investigate the cyto-genotoxic effect of various concentrations (5, 10, and 15 µM) of SNRs using Allium cepa model. As a result, concentration-dependent cyto-genotoxic effect of SNRs was observed through a decrease in the mitotic index, and an increase in the chromosomal aberrations such as chromosome break, disturbed metaphase, and anaphase bridge. To check the impact of Ag+ ions, 15 µM silver nitrate (AgNO3) was prepared and tested in all the assays. Furthermore, cell viability and different reactive oxygen species assays were performed to test the cytotoxicity evaluation of SNRs. The authors found that in all the tested assays, SNRs at high concentrations (15 µM) and AgNO3 (15 µM) were observed to cause maximal damage to the roots. Therefore, the current study implies that the cytotoxicity and genotoxicity of SNRs were dependent on the concentration of SNRs.
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Affiliation(s)
- Karthiga Durairaj
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore, India
| | - Barsha Roy
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, India
| | | | | | - Amitava Mukherjee
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore, India.
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Li W, Balachandran YL, Hao Y, Hao X, Li R, Nan Z, Zhang H, Shao Y, Liu Y. Amantadine Surface-Modified Silver Nanorods Improves Immunotherapy of HIV Vaccine Against HIV-Infected Cells. ACS Appl Mater Interfaces 2018; 10:28494-28501. [PMID: 30085647 DOI: 10.1021/acsami.8b10948] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface modifications can endow nanomaterials with presupposed immunoregulatory functions to optimize vaccine-induced immune responses. In this work, we modified an immunoregulatory molecule, amantadine (Ada), on the outermost layer of PVP-PEG-coated silver nanorods (Ada-PVP-PEG silver nanorods). Such Ada surface-modified silver nanorods promote HIV vaccine-triggered cytotoxic lymphocytes (CTLs) to produce around eightfold stronger tumor necrosis factor alpha (TNF-α) in vivo. The enhancement of HIV-specific CTL-derived TNF-α significantly facilitates the death of HIV-infected cells (from 28.86 to 84.19%) and reduces HIV production (around sixfold). This work supports the critical role of surface modifications of nanomaterials in fundamentally improving the immunotherapy of HIV vaccine against HIV-infected cells.
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Affiliation(s)
- Weiyu Li
- Beijing Key Laboratory of New Technology in Agricultural Application, National Demonstration Center for Experimental Plant Production Education , Beijing University of Agriculture , Beijing 102206 , China
| | - Yekkuni L Balachandran
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , No. 11 Zhongguancun Beiyitiao , Beijing 100190 , P. R. China
| | - Yanling Hao
- State Key Laboratory of Infectious Disease Prevention and Control, National Center for AIDS/STD Control and Prevention , Chinese Center for Disease Control and Prevention , Beijing 100190 , China
| | - Xie Hao
- Beijing Key Laboratory of New Technology in Agricultural Application, National Demonstration Center for Experimental Plant Production Education , Beijing University of Agriculture , Beijing 102206 , China
| | - Runzhi Li
- Beijing Key Laboratory of New Technology in Agricultural Application, National Demonstration Center for Experimental Plant Production Education , Beijing University of Agriculture , Beijing 102206 , China
| | - Zhangjie Nan
- Beijing Key Laboratory of New Technology in Agricultural Application, National Demonstration Center for Experimental Plant Production Education , Beijing University of Agriculture , Beijing 102206 , China
| | - Hongying Zhang
- College of Tobacco Science , Henan Agricultural University , Zhengzhou 450002 , China
| | - Yiming Shao
- State Key Laboratory of Infectious Disease Prevention and Control, National Center for AIDS/STD Control and Prevention , Chinese Center for Disease Control and Prevention , Beijing 100190 , China
| | - Ye Liu
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , No. 11 Zhongguancun Beiyitiao , Beijing 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
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Abstract
Directional optical nanoantennas are often realized by nanostructured systems with ingenious or complex designs. Herein we report on the realization of directional scattering of visible light from a simple configuration made of single Ag nanorods supported on Si substrates, where the incident light can be routed toward the two flanks of each nanorod. Such an intriguing far-field scattering behavior, which has not been investigated so far, is proved to result from the near-field coupling between high-aspect-ratio Ag nanorods and high-refractive-index Si substrates. A simple and intuitive model is proposed, where the complicated plasmon resonance is found to be equivalent to several vertically aligned electric dipoles oscillating in phase, to understand the far-field properties of the system. The interference among the electric dipoles results in wavefront reshaping and sidewise light routing in a similar manner to the broadside antenna described in the traditional antenna theory, allowing for the naming of these Si-supported Ag nanorods as "broadside nanoantennas". We have carried out comprehensive experiments to understand the physical origins behind and the affecting factors on the directional scattering behavior of such broadside nanoantennas.
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Affiliation(s)
- Xiaolu Zhuo
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Hang Kuen Yip
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Qifeng Ruan
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Tiankai Zhang
- Department of Electronic Engineering, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Xingzhong Zhu
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Hai-Qing Lin
- Beijing Computational Science Research Center , Beijing 100193, China
| | - Jian-Bin Xu
- Department of Electronic Engineering, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Zhi Yang
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University , Shanghai 200240, China
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Abstract
The study investigated the oxidative stress induction by the 10 and 25 nm silver nanorods (SNRs) following intra-tracheal instillation in rats after 1 day, 1 week, 1 month and 3 months post instillation periods at 1 and 5 mg/kg b.w. doses. The blood was withdrawn by retro orbital plexus method after exposure periods and different oxidative stress markers were estimated. The results showed that the both sizes of SNRs induced increased levels of malondialdehyde (MDA) and depleted glutathione (GSH) levels after 1 day and 1 week post exposure periods. The 10 and 25 nm SNRs at both doses displayed that significantly reduced levels of superoxide dismutase (SOD) and catalase following 1 day and 1 week post exposure periods. Also, the results have shown that decrease in total antioxidant capacity (TAC) of both sizes of SNRs significantly following 1 day and 1 week post exposure periods, indicating the oxidative stress induction by SNRs. In spite, there were no significant changes in oxidative stress markers following 1 month and 3 months post exposure periods may be due to recovery. The increased levels of MDA and decreased levels of GSH, SOD, catalase and TAC activity are strongly associated to ROS production and lipid peroxidation, suggesting the induction of oxidative stress in rats. The 10 nm SNRs at 5 mg/kg b.w. dose exposures in rats have shown greater changes in all oxidative stress parameters, indicating the greater induction of oxidative stress when compared with the 25 nm SNRs, representing the size-dose-dependent induction of oxidative stress of SNRs.
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Affiliation(s)
- Harikiran Lingabathula
- a Department of Pharmacology and Toxicology , University College of Pharmaceutical Sciences, Kakatiya University , Warangal , Telangana , India
| | - Narsimhareddy Yellu
- a Department of Pharmacology and Toxicology , University College of Pharmaceutical Sciences, Kakatiya University , Warangal , Telangana , India
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Zhu C, Meng G, Zheng P, Huang Q, Li Z, Hu X, Wang X, Huang Z, Li F, Wu N. A Hierarchically Ordered Array of Silver-Nanorod Bundles for Surface-Enhanced Raman Scattering Detection of Phenolic Pollutants. Adv Mater 2016; 28:4871-6. [PMID: 27112639 DOI: 10.1002/adma.201506251] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/20/2016] [Indexed: 05/12/2023]
Abstract
A hierarchically ordered array of Ag-nanorod bundles is achieved using an inexpensive binary-template-assisted electrodeposition technique. In every bundle, many small gaps are formed between adjacent Ag-nanorods, where "hot spots" are generated. As a result, this plasmonic nanostructure exhibits SERS enhancements of approximately eight orders of magnitude with uniform and reproducible SERS signal throughout the whole chip.
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Affiliation(s)
- Chuhong Zhu
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Guowen Meng
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
- Department of Materials Science & Engineering University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Peng Zheng
- Department of Mechanical and Aerospace Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV, 26506, USA
| | - Qing Huang
- Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Zhongbo Li
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xiaoye Hu
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xiujuan Wang
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Zhulin Huang
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Fadi Li
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Nianqiang Wu
- Department of Mechanical and Aerospace Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV, 26506, USA
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Zhu C, Meng G, Zheng P, Huang Q, Li Z, Hu X, Wang X, Huang Z, Li F, Wu N. Silver-Nanorod Bundles: A Hierarchically Ordered Array of Silver-Nanorod Bundles for Surface-Enhanced Raman Scattering Detection of Phenolic Pollutants (Adv. Mater. 24/2016). Adv Mater 2016; 28:4870. [PMID: 27311094 DOI: 10.1002/adma.201670168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
G. Meng, N. Wu, and co-workers develop a hierarchically ordered array of silver nanorod bundles for surface-enhanced Raman scattering (SERS) detection. As described on page 4871, in each bundle, small gaps are formed between adjacent silver nanorods upon solution evaporation. At these sites, "hot spots" are generated where analyte molecules are trapped, leading to high sensitivity of the SERS sensor.
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Affiliation(s)
- Chuhong Zhu
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Guowen Meng
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
- Department of Materials Science & Engineering University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Peng Zheng
- Department of Mechanical and Aerospace Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV, 26506, USA
| | - Qing Huang
- Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Zhongbo Li
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xiaoye Hu
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Xiujuan Wang
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Zhulin Huang
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Fadi Li
- Key Laboratory of Materials Physics, CAS Center for Excellence in Nanoscience, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China
| | - Nianqiang Wu
- Department of Mechanical and Aerospace Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV, 26506, USA
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Favi PM, Valencia MM, Elliott PR, Restrepo A, Gao M, Huang H, Pavon JJ, Webster TJ. Shape and surface chemistry effects on the cytotoxicity and cellular uptake of metallic nanorods and nanospheres. J Biomed Mater Res A 2015; 103:3940-55. [PMID: 26053238 DOI: 10.1002/jbm.a.35518] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 05/01/2015] [Accepted: 06/04/2015] [Indexed: 11/06/2022]
Abstract
Metallic nanoparticles (such as gold and silver) have been intensely studied for wound healing applications due to their ability to be easily functionalized, possess antibacterial properties, and their strong potential for targeted drug release. In this study, rod-shaped silver nanorods (AgNRs) and gold nanorods (AuNRs) were fabricated by electron beam physical vapor deposition (EBPVD), and their cytotoxicity toward human skin fibroblasts were assessed and compared to sphere-shaped silver nanospheres (AgNSs) and gold nanospheres (AuNSs). Results showed that the 39.94 nm AgNSs showed the greatest toxicity with fibroblast cells followed by the 61.06 nm AuNSs, ∼556 nm × 47 nm (11.8:1 aspect ratio) AgNRs, and the ∼534 nm × 65 nm (8.2:1 aspect ratio) AuNRs demonstrated the least amount of toxicity. The calculated IC50 (50% inhibitory concentration) value for the AgNRs exposed to fibroblasts was greater after 4 days of exposure (387.3 μg mL(-1)) compared to the AgNSs and AuNSs (4.3 and 23.4 μg mL(-1), respectively), indicating that these spherical metallic nanoparticles displayed a greater toxicity to fibroblast cells. The IC50 value could not be measured for the AuNRs due to an incomplete dose response curve. The reduced cell toxicity with the presently developed rod-shaped nanoparticles suggests that they may be promising materials for use in numerous biomedical applications.
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Affiliation(s)
- Pelagie Marlene Favi
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts
| | | | - Paul Robert Elliott
- Department of Mechanical Engineering, University of Connecticut, Storrs, Connecticut.,Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts
| | - Alejandro Restrepo
- Advanced Biomaterials and Regenerative Medicine, ABRM Bioengineering Programme, University of Antioquia, Medellín, Colombia
| | - Ming Gao
- Department of Pharmaceutical Sciences School of Pharmacy, Bouvé College of Health Sciences, Northeastern University, Boston, Massachusetts
| | - Hanchen Huang
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts
| | - Juan Jose Pavon
- Advanced Biomaterials and Regenerative Medicine, ABRM Bioengineering Programme, University of Antioquia, Medellín, Colombia
| | - Thomas Jay Webster
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts.,Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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12
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Zhuo X, Zhu X, Li Q, Yang Z, Wang J. Gold Nanobipyramid-Directed Growth of Length-Variable Silver Nanorods with Multipolar Plasmon Resonances. ACS Nano 2015; 9:7523-35. [PMID: 26135608 DOI: 10.1021/acsnano.5b02622] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report on a method for the preparation of uniform and length-variable Ag nanorods through anisotropic Ag overgrowth on high-purity Au nanobipyramids. The rod diameters can be roughly tailored from ∼20 nm to ∼50 nm by judicious selection of differently sized Au nanobipyramids. The rod lengths can be tuned from ∼150 nm to ∼550 nm by varying the Ag precursor amount during the overgrowth process and/or by anisotropic shortening through mild oxidation. The controllable aspect ratios, high purity, and high dimensional uniformity of these Ag nanorods enable the observation of Fabry-Pérot-like multipolar plasmon resonance modes in the colloidal suspensions at the ensemble level, which has so far been demonstrated only on Au nanorods prepared electrochemically with anodic aluminum oxide templates. Depending on the mode order and geometry of the Ag nanorods, the multipolar plasmon wavelengths can be readily tailored over a wide spectral range from the visible to near-infrared region. We have further elucidated the relationships between the multipolar plasmon wavelengths and the geometric dimensions of the Ag nanorods at both the ensemble and single-particle levels. Our results indicate that the Au nanobipyramid-directed, dimensionally controllable Ag nanorods will be an attractive and promising candidate for developing multipolar plasmon-based devices and applications.
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Affiliation(s)
- Xiaolu Zhuo
- †Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xingzhong Zhu
- †Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
- ‡Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qian Li
- †Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Zhi Yang
- ‡Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jianfang Wang
- †Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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Goel P, Kumar S, Sarkar J, Singh JP. Mechanical Strain Induced Tunable Anisotropic Wetting on Buckled PDMS Silver Nanorods Arrays. ACS Appl Mater Interfaces 2015; 7:8419-8426. [PMID: 25844957 DOI: 10.1021/acsami.5b01530] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report the fabrication of anisotropic superhydrophobic surface with dual-scale roughness by the deposition of silver nanorods arrays on prestretched poly(dimethylsiloxane) (PDMS) using oblique angle deposition and subsequent release of strain after the deposition, which resulted in the formation of microbuckles/wrinkles. The amplitude and periodicity of the wrinkles were tuned by varying the prestretching mechanical strain (ε) applied to the PDMS film from 0 to 30% prior to Ag nanorods deposition. The peaks and valleys in the surface topography of Ag nanorods arrays covered PDMS films lead to anisotropic wetting by water droplet. The droplet is free to move along the direction parallel to the wrinkles, but the droplet moving perpendicular to the wrinkles confront energy barrier leading to wetting anisotropy. The anisotropic wettability was tuned from 22 to 37° for 10-30% prestretched PDMS film. The dual scale roughness (nanorods on micro wrinkles) was found to be responsible for the superhydrophobicity (contact angle ∼155°) of the sample prepared for 30% prestretched PDMS film in perpendicular direction. The wetting behavior of the Ag nanorods PDMS film surface was reversibly tuned by applying the mechanical strain, which induces the change in the microscale roughness determined by amplitude (A) and periodicity (λ) of the buckles. Most interestingly, the water droplet also displayed the anisotropy in the roll-off angle. The effect of different A and λ on anisotropic wettability of Ag nanorods arrays/PDMS film was also demonstrated by lattice Boltzmann (LB) modeling. These findings may produce a promising way of controlling the direction of liquid flow such as in microfluidic devices and transportation of the microliter water droplets in a preset direction.
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Affiliation(s)
- Pratibha Goel
- †Department of Physics and ‡Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Samir Kumar
- †Department of Physics and ‡Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Jayati Sarkar
- †Department of Physics and ‡Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Jitendra P Singh
- †Department of Physics and ‡Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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Yu YC, Liu JM, Jin CJ, Wang XH. Plasmon-mediated resonance energy transfer by metallic nanorods. Nanoscale Res Lett 2013; 8:209. [PMID: 23641862 PMCID: PMC3653766 DOI: 10.1186/1556-276x-8-209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 04/22/2013] [Indexed: 05/28/2023]
Abstract
We investigate the enhancement of the resonance energy transfer rate between donor and acceptor associated by the surface plasmons of the Ag nanorods on a SiO2 substrate. Our results for a single nanorod with different cross sections reveal that the cylinder nanorod has the strongest ability to enhance the resonance energy transfer rate. Moreover, for donor and acceptor with nonparallel polarization directions, we propose simple V-shaped nanorod structures which lead to the remarkable resonance energy transfer enhancement that is ten times larger than that by the single nanorod structure. We demonstrate that these structures have good robustness and controllability. Our work provides a way to improve the resonance energy transfer efficiency in integrated photonic devices. PACS: 78.67.Qa, 73.20.Mf, 42.50.Ex.
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Affiliation(s)
- Yi-Cong Yu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Jia-Ming Liu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Chong-Jun Jin
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Xue-Hua Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
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15
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Zhou Q, Zhang X, Huang Y, Li Z, Zhang Z. Rapid detection of polychlorinated biphenyls at trace levels in real environmental samples by surface-enhanced Raman scattering. Sensors (Basel) 2012; 11:10851-8. [PMID: 22346675 PMCID: PMC3274317 DOI: 10.3390/s111110851] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 11/08/2011] [Accepted: 11/09/2011] [Indexed: 11/17/2022]
Abstract
Detection of trace levels of persistent pollutants in the environment is difficult but significant. Organic pollutant homologues, due to their similar physical and chemical properties, are even more difficult to distinguish, especially in trace amounts. We report here a simple method to detect polychlorinated biphenyls (PCBs) in soil and distilled spirit samples by the surface-enhanced Raman scattering technique using Ag nanorod arrays as substrates. By this method, polychlorinated biphenyls can be detected to a concentration of 5 μg/g in dry soil samples within 1 minute. Furthermore, based on simulation and understanding of the Raman characteristics of PCBs, we recognized homologues of tetrachlorobiphenyl by using the surface-enhance Raman scattering method even in trace amounts in acetone solutions, and their characteristic Raman peaks still can be distinguished at a concentration of 10−6 mol/L. This study provides a fast, simple and sensitive method for the detection and recognition of organic pollutants such as polychlorinated biphenyls.
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Affiliation(s)
- Qin Zhou
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, 30 Shuangqing Road, Beijing 100084, China; E-Mails: (Q.Z.); (X.Z.); (Y.H.); (Z.L.)
- Institute of Nuclear and New Energy Technology, Tsinghua University, 30 Shuangqing Road, Beijing 100084, China
| | - Xian Zhang
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, 30 Shuangqing Road, Beijing 100084, China; E-Mails: (Q.Z.); (X.Z.); (Y.H.); (Z.L.)
| | - Yu Huang
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, 30 Shuangqing Road, Beijing 100084, China; E-Mails: (Q.Z.); (X.Z.); (Y.H.); (Z.L.)
| | - Zhengcao Li
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, 30 Shuangqing Road, Beijing 100084, China; E-Mails: (Q.Z.); (X.Z.); (Y.H.); (Z.L.)
| | - Zhengjun Zhang
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, 30 Shuangqing Road, Beijing 100084, China; E-Mails: (Q.Z.); (X.Z.); (Y.H.); (Z.L.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-010-6279-7033; Fax: +86-010-6277-1160
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Aslan K, Lakowicz JR, Geddes CD. Metal-enhanced fluorescence using anisotropic silver nanostructures: critical progress to date. Anal Bioanal Chem 2005; 382:926-33. [PMID: 15937664 PMCID: PMC6844248 DOI: 10.1007/s00216-005-3195-3] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2004] [Revised: 02/21/2005] [Accepted: 02/23/2005] [Indexed: 10/25/2022]
Abstract
In this critical and timely review, the effects of anisotropic silver nanostructures on the emission intensity and photostability of a key fluorophore that is frequently used in many biological assays is examined. The silver nanostructures consist of triangular, rod-like, and fractal-like nanoparticles of silver deposited on conventional glass substrates. The close proximity to silver nanostructures results in greater intensity and photostability of the fluorophore than for fluorophores solely deposited on glass substrates. These new anisotropic silver nanostructure-coated surfaces show much more favorable effects than silver island films or silver colloid-coated substrates. Subsequently, the use of metal-enhanced fluorescence (MEF) for biosensing applications is discussed.
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Affiliation(s)
- Kadir Aslan
- Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, Institute of Fluorescence, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA
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