Investigation of Gold and Silver Nanoparticles on Absorption Heating and Scattering Imaging |
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Authors: | Yu Juan Zhang |
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Institution: | (1) Department of Pharmaceutics, Biopharmaceutics and Biotechnology, Free University of Berlin, Kelchstr. 31, 12169 Berlin, Germany |
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Abstract: | Efficient conversion of absorbed light to heat energy and strong scattering by gold and silver nanoparticles suggest these
nanoparticles as the agents of heating and imaging. Absorption efficiency and scattering efficiency of gold and silver nanoparticles
were studied through numerical simulation using the discrete dipole approximation method. This study shows that the size of
gold and silver nanoparticles can effect gold and silver nanoparticles’ absorption efficiency and scattering efficiency. The
gold nanoparticle is found to possess the maximum absorption efficiency when the size of gold nanoparticle is 50 nm and the
incident wavelength is 540 nm, and the increasing scattering efficiency with the increasing size of gold nanoparticle in the
medium, and refractive index of the medium is around 1.33. However, the silver nanoparticle owns the maximum absorption efficiency
when the size of silver nanoparticle is 20 nm and the incident wavelength is 396 nm, and the maximum scattering efficiency
when the size of silver nanoparticle is 30 nm and the incident wavelength is 410 nm in the same medium. The conditions for
achieving the maximum adsorption efficiency and scattering efficiency of gold and silver nanoparticle can be used for heating
and imaging using visible and near-infrared light. |
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