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Color modulation of Ag nanoparticle dispersion by light‐induced aggregation
Author(s) -
Ebisawa Mizue,
Yamaguchi Takashi,
Teranishi Yoshikazu,
Isoda Kazutaka
Publication year - 2017
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22556
Subject(s) - dipole , irradiation , surface plasmon resonance , nanoparticle , dispersion (optics) , dielectric , light scattering , resonance (particle physics) , molecular physics , materials science , plasmon , chemical physics , scattering , optoelectronics , optics , chemistry , atomic physics , nanotechnology , physics , organic chemistry , nuclear physics
In this paper, it is demonstrated that aggregation of Ag nanoparticles dispersed in pure water is mediated by strong dipole–dipole interactions produced by light irradiation. Expecting the effect of attractive forces caused by the dipole moments arising from localized surface plasmon resonance, an irradiation source based on the spectrum of the scattering cross section calculated from the geometric characteristics and dielectric constants of Ag and pure water is employed. In this process, it is possible to modulate the optical color of the dispersion by controlling the degree of aggregation of particles using the irradiation time without a chemical reaction.