Nano-Micro Letters

Molybdenum Nanoscrews: A Novel Non-coinage-Metal Substrate for Surface-Enhanced Raman Scattering

Di An1, Yan Shen1, Jinxiu Wen1, Zebo Zheng1, Jun Chen1, Juncong She1, Huanjun Chen1,*, Shaozhi Deng1, Ningsheng Xu1,*

Abstract
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Nano-Micro Lett.(2017) 9: 2

Published online:31 August 2016 (Article)

DOI:10.1007/s40820-016-0104-6

Abstract

 


Figure discription XXX

For the first time, Mo nanoscrew was cultivated as a novel non-coinage-metal substrate for surface-enhanced Raman scattering (SERS). It was found that the nanoscrew is composed of many small screw threads stacking along its length direction with small separations. Under external light excitation, strong electromagnetic coupling was initiated within the gaps, and many hot-spots formed on the surface of the nanoscrew, which was confirmed by high-resolution scanning near-field optical microscope (SNOM) measurements and numerical simulations using finite element method (FEM). These hot-spots are responsible for the observed SERS activity of the nanoscrews. Raman mapping characterizations further revealed the excellent reproducibility of the SERS activity. Our findings may pave the way for design of low-cost and stable SERS substrates.


 

Keywords

Surface-enhanced Raman scattering (SERS); Molybdenum nanoscrews; Quasi-one dimensional nanostructures; Electric field enhancements

 

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