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Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers
Optical manipulation and label-free characterization of nanoscale structures open up new possibilities for assembly and control of nanodevices and biomolecules. Optical tweezers integrated with Raman spectroscopy allows analyzing a single trapped particle, but is generally less effective for individ...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5314326/ https://www.ncbi.nlm.nih.gov/pubmed/28211526 http://dx.doi.org/10.1038/srep42930 |
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author | Wu, Mu-ying Ling, Dong-xiong Ling, Lin Li, William Li, Yong-qing |
author_facet | Wu, Mu-ying Ling, Dong-xiong Ling, Lin Li, William Li, Yong-qing |
author_sort | Wu, Mu-ying |
collection | PubMed |
description | Optical manipulation and label-free characterization of nanoscale structures open up new possibilities for assembly and control of nanodevices and biomolecules. Optical tweezers integrated with Raman spectroscopy allows analyzing a single trapped particle, but is generally less effective for individual nanoparticles. The main challenge is the weak gradient force on nanoparticles that is insufficient to overcome the destabilizing effect of scattering force and Brownian motion. Here, we present standing-wave Raman tweezers for stable trapping and sensitive characterization of single isolated nanostructures with a low laser power by combining a standing-wave optical trap with confocal Raman spectroscopy. This scheme has stronger intensity gradients and balanced scattering forces, and thus can be used to analyze many nanoparticles that cannot be measured with single-beam Raman tweezers, including individual single-walled carbon nanotubes (SWCNT), graphene flakes, biological particles, SERS-active metal nanoparticles, and high-refractive semiconductor nanoparticles. This would enable sorting and characterization of specific SWCNTs and other nanoparticles based on their increased Raman fingerprints. |
format | Online Article Text |
id | pubmed-5314326 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-53143262017-02-23 Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers Wu, Mu-ying Ling, Dong-xiong Ling, Lin Li, William Li, Yong-qing Sci Rep Article Optical manipulation and label-free characterization of nanoscale structures open up new possibilities for assembly and control of nanodevices and biomolecules. Optical tweezers integrated with Raman spectroscopy allows analyzing a single trapped particle, but is generally less effective for individual nanoparticles. The main challenge is the weak gradient force on nanoparticles that is insufficient to overcome the destabilizing effect of scattering force and Brownian motion. Here, we present standing-wave Raman tweezers for stable trapping and sensitive characterization of single isolated nanostructures with a low laser power by combining a standing-wave optical trap with confocal Raman spectroscopy. This scheme has stronger intensity gradients and balanced scattering forces, and thus can be used to analyze many nanoparticles that cannot be measured with single-beam Raman tweezers, including individual single-walled carbon nanotubes (SWCNT), graphene flakes, biological particles, SERS-active metal nanoparticles, and high-refractive semiconductor nanoparticles. This would enable sorting and characterization of specific SWCNTs and other nanoparticles based on their increased Raman fingerprints. Nature Publishing Group 2017-02-17 /pmc/articles/PMC5314326/ /pubmed/28211526 http://dx.doi.org/10.1038/srep42930 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Wu, Mu-ying Ling, Dong-xiong Ling, Lin Li, William Li, Yong-qing Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers |
title | Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers |
title_full | Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers |
title_fullStr | Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers |
title_full_unstemmed | Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers |
title_short | Stable optical trapping and sensitive characterization of nanostructures using standing-wave Raman tweezers |
title_sort | stable optical trapping and sensitive characterization of nanostructures using standing-wave raman tweezers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5314326/ https://www.ncbi.nlm.nih.gov/pubmed/28211526 http://dx.doi.org/10.1038/srep42930 |
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