Development of Nanostructure-assisted Optical Tweezers

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  • SHOJI Tatsuya
    Graduate School of Science, Osaka City University The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University

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Other Title
  • ナノ構造体を用いる光ピンセットの開発
  • ナノ コウゾウタイ オ モチイル ヒカリ ピンセット ノ カイハツ

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Abstract

<p>Optical tweezers can manipulate microparticles, such as bacteria and viruses in solution based on the optical force. Novel optical tweezers for nanoparticles will open a new channel for analytical chemistry. We have developed novel optical nanomanipulation for soft nanomatters with metallic and semiconductor nanostructures. This paper describes such optical manipulation and analytical applications with our technique. First, optical manipulation of thermo-responsive polymer chains in water provides a quantitative analysis to determine the polymer concentration of the phase-separated polymer microdroplet. Second, a localized surface plasmon enables us to enhance the optical force, leading to the formation of micro-assmebly of soft nanomaterials, such as polymer chains and DNA. The polymer micro-assembly can extract organic molecules dossolved in solution for detecting them by means of fluorescence/Raman microspectroscopies. Finally, non-plasmonic nanostructured-semiconductor assisted (NASSCA) optical tweezers will be a powerful tool to trap nanoparticles without any photothermal effect.</p>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 68 (5), 315-324, 2019-05-05

    The Japan Society for Analytical Chemistry

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