Analysis of the structure of the collective motion of small particles by dynamic light scattering

Masazumi Higuchi; Hiroshi Takano; Osamu Yamaguchi; Masayuki Itoh

doi:10.1117/12.347742

7 May 1999 Analysis of the structure of the collective motion of small particles by dynamic light scattering

Masazumi Higuchi, Hiroshi Takano, Osamu Yamaguchi, Masayuki Itoh

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347742
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

Abstract

A new optical sensor using local plasmon resonance is proposed. The sensor uses the principle that the extinction efficiency of a small metal particle depends on the effective refractive index of the medium surrounding the particle. We use gold colloid monolayers for the sensor, in which colloidal gold particles of 16-nm diameter are immobilized on a glass slide using functional organic coupling agent. We measured absorption spectra of the gold colloid monolayers immersed in liquid samples and coated with film samples. In the experiments for poly-(methyl methacrylate acid) films we obtained the thickness sensitivities of 0.009 absorbance/nm and 4.3 nm/nm for peak absorbance and for resonance wavelength, respectively.

Citation Download Citation

Masazumi Higuchi, Hiroshi Takano, Osamu Yamaguchi, and Masayuki Itoh "Analysis of the structure of the collective motion of small particles by dynamic light scattering", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347742

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