Stable optical trapping and sensitive characterization of nanostructures using standing- wave Raman tweezers
Author
Wu, Mu-ying; Ling, Dong-xiong; Ling, Lin; Li, William; Li, Yong-qing
Abstract
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.
Date
2017-02-17
Citation:
APA:
Wu, Mu-ying, & Ling, Dong-xiong, & Ling, Lin, & Li, William, & Li, Yong-qing. (February 2017).
Stable optical trapping and sensitive characterization of nanostructures using standing- wave Raman tweezers.
,
(),
-
. Retrieved from
http://hdl.handle.net/10342/8361
MLA:
Wu, Mu-ying, and Ling, Dong-xiong, and Ling, Lin, and Li, William, and Li, Yong-qing.
"Stable optical trapping and sensitive characterization of nanostructures using standing- wave Raman tweezers". .
. (),
February 2017.
June 29, 2024.
http://hdl.handle.net/10342/8361.
Chicago:
Wu, Mu-ying and Ling, Dong-xiong and Ling, Lin and Li, William and Li, Yong-qing,
"Stable optical trapping and sensitive characterization of nanostructures using standing- wave Raman tweezers," , no.
(February 2017),
http://hdl.handle.net/10342/8361 (accessed
June 29, 2024).
AMA:
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. .
February 2017;
():
.
http://hdl.handle.net/10342/8361. Accessed
June 29, 2024.
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