标题：Colloidal Assembly and Active Tuning of Coupled Plasmonic Nanospheres
作者：Li Z.; Wang W.; Yin Y.
作者机构：[Li, Z] Department of Chemistry, University of California, Riverside, CA 92521, United States;[ Wang, W] National Engineering Research Center for Col 更多
通讯作者地址：[Yin, Y] Department of Chemistry, University of CaliforniaUnited States;
来源：Trends in Chemistry
关键词：colorimetric sensors; coupling; enhanced fluorescence; LSPR; self-assembly; SERS
摘要：Localized surface plasmon resonance (LSPR) originates from the collective oscillation of conduction electrons when conductive nanoparticles are exposed to an electromagnetic field. It generates remarkably enhanced electric fields surrounding the nanoparticles and leads to strong extinction at the resonant wavelength. When plasmonic particles are in considerably close proximity, plasmon coupling occurs because of the interacting resonance of the excited plasmon. It enables the hybridization of the initial plasmon bands in the form of peak shift or reshaping of local bands. Colloidal self-assembly approaches offer many opportunities for manipulating particle arrangement, making it possible to actively tune the plasmon coupling in response to external stimuli, which may promise important applications in many fields such as colorimetric sensing and enhanced spectroscopic detection. © 2020 Elsevier Inc.