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Local photothermal conversion using metal semi-shell arrays

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Abstract

The high-efficient photothermal conversion on metal nanostructures by localized surface plasmon is attractive in these days. When incident light is absorbed by surface plasmons, hot carriers are generated and changed into heat due to the relaxation. For example, it has been experimentally confirmed that the local water temperature on gold nano particle arrays irradiated by laser exceeds 200°C just before micro bubble generation.[1] These heat generation phenomena are applied in various research fields such as photothermal therapy, solar thermal conversion, local chemical reaction, etc. Among these researches, with the mind of the catalytic effect on metal under general pressure and temperature, we fabricated various metal semi-shell arrays by colloidal self-assembly and investigated the generation of micro bubbles under laser light irradiation in water.

© 2017 Japan Society of Applied Physics, Optical Society of America

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