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Light‐Tunable Thermosensitivity of Polymer‐Coated Gold Nanoparticles Achieved by Light‐Controlled Molecular Recognition
Author(s) -
Luo Chunhua,
Dong Qiujing,
Zheng Zhaohui,
Ding Xiaobin,
Peng Yuxing
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100046
Subject(s) - azobenzene , photoisomerization , moiety , colloidal gold , photochemistry , copolymer , polymer , nanoparticle , polymer chemistry , chemistry , visible spectrum , materials science , nanotechnology , stereochemistry , organic chemistry , catalysis , optoelectronics , isomerization
Thermo‐ and photosensitive gold nanoparticles (AuNPs) coated with an azobenzene‐contained P(DMA‐PAPA‐MAEL) copolymer are prepared by ligand exchange reactions. The photoisomerization of azobenzene moiety on the surface of P(DMA‐PAPA‐MAEL)‐coated AuNPs is detected by means of UV‐Vis spectroscopy with the presence or absence of free α ‐cyclodextrin. When subjected to visible and UV light irradiation alternately, P(DMA‐PAPA‐MAEL)‐coated AuNPs in the presence of free α‐CD display a light‐tunable lower critical solution temperature through light‐controlled molecular recognition between the azobenzene moiety on the surface of AuNPs and free α‐CD.