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ID 113993
著者
Aibara, Issei University of Tokushima
Mukai, Shinya University of Tokushima
資料タイプ
学術雑誌論文
抄録
The localized-surface-plasmon resonance (LSPR) of gold nanoparticles (Au NPs) depends sensitively on the environmental refractive index. We found that LSPRs of single Au NPs supported on a transparent substrate can monitor the phase transition/separation of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) in aqueous solution. Both reversible and irreversible phase separations were observed. Plasmonic-heating-induced redshifts and subsequent cooling-induced recovery were observed on a glass substrate. Besides reversible redshifts at lower laser intensities, permanent redshifts were evident at higher intensities after illumination on a sapphire substrate, which has a much higher thermal conductivity than glass. The permanent redshifts were caused by the formation of a PNIPAM shell around the NP. For this permanent aggregation, temperature shaping around the Au NP by the substrate was found decisive and may find new chemistry applications based on local temperature landscapes. The observed nanofabrication of core–shell particles is one such example.
掲載誌名
The Journal of Physical Chemistry C
ISSN
19327447
19327455
cat書誌ID
AA1217589X
AA12192210
出版者
ACS Publications
120
31
開始ページ
17745
終了ページ
17752
発行日
2016-07-11
権利情報
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.6b04265.
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出版社版DOI
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フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
理工学系