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Light‐Triggered Self‐Assembly of Gold Nanoparticles Based on Photoisomerization of Spirothiopyran
Author(s) -
Shiraishi Yasuhiro,
Tanaka Kazuya,
Shirakawa Eri,
Sugano Yoshitsune,
Ichikawa Satoshi,
Tanaka Shunsuke,
Hirai Takayuki
Publication year - 2013
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201302430
Subject(s) - photoisomerization , colloidal gold , nanoparticle , covalent bond , aqueous solution , self assembly , nanotechnology , chemistry , aggregate (composite) , photochemistry , materials science , chemical engineering , catalysis , organic chemistry , isomerization , engineering
Give it some stick : UV irradiation of spirothiopyran in an aqueous solution of gold nanoparticles (AuNPs) gives AuNP aggregates. The aggregate size is tuned by the photoirradiation time and the aggregation is facilitated by the covalent binding of photoisomerized spirothiopyran to the surface of the AuNPs. This binding decreases the electrostatic repulsion between the AuNPs.