標題: Dynamic Coupling of Optically Evolved Assembling and Swarming of Gold Nanoparticles with Photothermal Local Phase Separation of Polymer Solution
作者: Aibara, Issei
Huang, Chih-Hao
Kudo, Tetsuhiro
Bresoli-Obach, Roger
Hofkens, Johan
Furube, Akihiro
Masuhara, Hiroshi
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
公開日期: 30-Jul-2020
摘要: Optical trapping of gold nanoparticles (Au NPs) at a glass/solution interface initially generates a periodically aligned structure of a few NPs along the direction perpendicular to a linearly polarized laser. When the number of NPs was increased, this alignment was expanded to the outside of the irradiated focus, forming a single large assembly where the Au NPs dynamically fluctuated like a swarming of bees. The morphology was dumbbell-shape, consisting of two swarms at both sides of the focus, and its size reached about 10 mu m. This optically evolved assembling and swarming was studied in poly(N-isopropylacrylamide) (PNIPAM) solution, where liquid-liquid phase separation (LLPS) was induced by photothermal heating of the trapped Au NPs forming a microdroplet of highly concentrated PNIPAM. Dynamic coupling of the NPs assembling and swarming with the droplet formation of PNIPAM leads to cooperative optical evolution, through which the assembly was embedded in the single microdroplet.
URI: http://dx.doi.org/10.1021/acs.jpcc.0c02777
http://hdl.handle.net/11536/155115
ISSN: 1932-7447
DOI: 10.1021/acs.jpcc.0c02777
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 124
Issue: 30
起始頁: 16604
結束頁: 16615
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