Nanoparticle sizing method based on fluorescence anisotropy analysis

Terutake Hayashi, Yuki Ishizaki, Masaki Michihata, Yasuhiro Takaya, Shin Ichi Tanaka

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

Demand for applications of nanoparticles in electric architecture has been increasing. Nanoparticles provide new opportunities for improving circuit response. We discuss a novel method for evaluating nanoparticle sizes based on fluorescence anisotropy analysis. Particle size evaluation is possible through measurements of the rotational diffusion coefficient, which is sensitive to particle size. We develop a system for measuring rotational diffusion coefficients by using a fluorescent probe to label a particle. We report fundamental experiments that verify the feasibility of the proposed method. The rotational diffusion coefficients of gold nanoparticles with diameters ranging 6-20 nm were measured using the proposed method. The measured rotational diffusion coefficients decrease with increasing particle size. This finding indicates that nanoparticles smaller than 15 nm can be measured with fine resolution.

本文言語英語
ページ(範囲)382-388
ページ数7
ジャーナルMeasurement: Journal of the International Measurement Confederation
59
DOI
出版ステータス出版済み - 1月 2015
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 器械工学
  • 電子工学および電気工学

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