Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-05-27

Journal: NANOTECHNOLOGY

Included Journals: PubMed、EI、SCIE、Scopus

Volume: 22

Issue: 21

Page Number: 215701

ISSN: 0957-4484

Abstract: A facile method to prepare uniform and reproducible surface-enhanced Raman scattering (SERS) substrates is presented. Quasi-spherical silver colloids prepared by microwave heating and wafer-scale uniform silicon nanowire (SiNW) arrays fabricated via wet chemical etching were united together as SERS substrates. The novel SERS substrates displayed stronger Raman enhancement than conventional silver colloids as well as outstanding uniformity and reproducibility in our experiments. In addition, it was found that the cross section of SiNW arrays possessed stronger enhancement activity than the front side. The enhancement effects of two adjacent SiNWs (as a simplification of SiNW arrays) were evaluated by the finite difference time domain (FDTD) method.