Quasi Optical Cavity of Hierarchical ZnO Nanosheets@Ag Nanoravines with Synergy of Near- and Far-Field Effects for in Situ Raman Detection

Jing Yu; Yu Guo; Huijie Wang; Shuai Su; Chao Zhang; Baoyuan Man; Fengcai Lei

doi:10.1021/acs.jpclett.9b01390

Quasi Optical Cavity of Hierarchical ZnO Nanosheets@Ag Nanoravines with Synergy of Near- and Far-Field Effects for in Situ Raman Detection

J Phys Chem Lett. 2019 Jul 5;10(13):3676-3680. doi: 10.1021/acs.jpclett.9b01390. Epub 2019 Jun 18.

Authors

Jing Yu^{1

2}, Yu Guo², Huijie Wang³, Shuai Su⁴, Chao Zhang², Baoyuan Man², Fengcai Lei¹

Affiliations

¹ College of Chemistry, Chemical Engineering and Materials Science, Institute of Biomedical Sciences , Shandong Normal University , Jinan 250014 , P.R. China.
² School of Physics and Electronics, Institute of Materials and Clean Energy , Shandong Normal University , Jinan 250014 , P.R. China.
³ School of Physics and Information Engineering , Shanxi Normal University , Linfen 041004 , P.R. China.
⁴ College of Animal Science and Technology , Shandong Agricultural University , Taian 271018 , P.R. China.

PMID: 31204810
DOI: 10.1021/acs.jpclett.9b01390

Abstract

The vertically interlaced hierarchical structure (HS) of ZnO nanosheets (NSs)@Ag nanoravines (NRs) as a quasi optical cavity (QOC) for Raman enhancement has been studied experimentally and theoretically in this work. A novel synergism of near- and far-field effects of Ag NRs is facilitated by the multiple oscillation of light inside the ZnO QOC, providing wide distributions of "hot spots" in a large space. The "spatial hot spots" in the HS bring reliable signal collection in in situ Raman detection. Without any specific materials and methods adopted, this HS provides researchers a new way to adjust the light in the fields of Raman enhancement.