期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 465, 期 -, 页码 20-25出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2014.10.028
关键词
Nanoparticles; Gold; Catalytic reaction; Surface enhanced Raman scattering (SERS); Molecular orientation
In this work, gold nanostars (AuNSs) with size around 90 nm were prepared through an easy one-step method. They show excellent catalytic activity and large surface-enhanced Raman scattering (SERS) activity at the same time. Surprisingly, they exhibited different catalytic performance on the reduction of aromatic nitro compounds with different substituents on the para position. To understand such a difference, the SERS spectra were recorded, showing that the molecular orientation of reactants on the gold surface were different. We anticipate that this research will help to understand the relationship of the molecular orientation with the catalytic activity of gold nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.
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