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    Stable optical trapping and sensitive characterization of nanostructures using standing- wave Raman tweezers

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    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.
    URI
    http://hdl.handle.net/10342/8361
    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. Scientific Reports, (7:1), p.. Retrieved from http://hdl.handle.net/10342/8361

    Display/Hide MLA, Chicago and APA citation formats.

    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". Scientific Reports. 7:1. (.), February 2017. February 24, 2021. 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," Scientific Reports 7, no. 1 (February 2017), http://hdl.handle.net/10342/8361 (accessed February 24, 2021).
    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. Scientific Reports. February 2017; 7(1) . http://hdl.handle.net/10342/8361. Accessed February 24, 2021.
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