文献类型：期刊文献

英文题名：Mussel-Inspired Polydopamine Functionalized Plasmonic Nanocomposites for Single-Particle Catalysis

作者：Wang, Jun-Gang[1];Hua, Xin[1];Li, Meng[1,2];Long, Yi-Tao[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Risk Assessment &, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2017

卷号：9

期号：3

起止页码：3016

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20170603321118);WOS:【SCI-EXPANDED(收录号:WOS:000392909500115)】；

基金：This research was supported by the Science Fund for Creative Research Groups (21421004), the National Natural Science Foundation of China (21327807), the Program of Shanghai Subject Chief Scientist (15XD1501200), the Programme of Introducing Talents of Discipline to Universities (B16017), and the State Key Laboratory of Analytical Chemistry for Life Science Open Foundation (SKLACLS1512).

语种：英文

外文关键词：single-particle catalysis; polydopamine; plasmonic nanocomposites; dark-field microscopy; ToF-SIMS

摘要：Polydopamine functionalized plasmonic nano composites with well-distributed catalytically active small gold nanoislands around large gold core were fabricated without using any chemical reductant or surfactant. The optical properties, surface molecular structures, and ensemble catalytic activity of the gold nanocomposites were investigated by time of flight secondary ion mass spectrometry and UV-vis spectroscopy, respectively. Moreover, the considerable catalytic activity of the nanocomposites toward 4-nitrophenol reduction was real time monitored by dark-field spectroscopy techniques at the single-nanoparticle level avoiding averaging effects in bulk systems. According to the obtained plasmonic signals from individual nanocomposites, the electron charging and discharging rates for these nanocomposites during the catalytic process were calculated. Our results offer new insights into the design and synthesis of plasmonic nanocomposites for future catalytic applications as well as a further mechanistic understanding of the electron transfer during the catalytic process at the single-nanoparticle level.