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Few-layer MoS2-encapsulated Cu nanoparticle hybrids fabricated by two-step annealing process for surface enhanced Raman scattering

Few-layer MoS2-encapsulated Cu nanoparticle hybrids fabricated by two-step annealing process for surface enhanced Raman scattering

Authors :
Shouzhen Jiang
Zhen Li
Yingqiang Sheng
Yanyan Huo
Chao Zhang
Hengwei Qiu
Chonghui Li
Cheng Yang
Shicai Xu
Baoyuan Man
Source :
Sensors and Actuators B: Chemical. 230:645-652
Publication Year :
2016
Publisher :
Elsevier BV, 2016.

Abstract

Here we designed a new kind of SERS substrate referred to as a MoS 2 -coated Cu nanopaticles (MoS 2 @CuNPs) substrate for R6G detection. The Cu nanoparticles wrapped by a thin MoS 2 film were directly synthesized on flat quartz by two annealing process in a mixture of argon and hydrogen. Signals from a MoS 2 @CuNPs SERS substrate were also demonstrated to have interesting advantages over pure CuNPs SERS, in terms of the excellent linear relationship between Raman intensity and analyte concentration, strongly background fluorescence quenching and being more stable against photo-induced damage and oxidation. The minimum detectable concentrations of R6G on MoS 2 @CuNPs hybrids can be as low as 10 −9 M which is one order lower than that on the pure CuNPs substrates. This synthetic approach is facile, scalable and applicable to the MoS 2 film compound with other metals such as Ag, Au etc.

Details

ISSN :
09254005
Volume :
230
Database :
OpenAIRE
Journal :
Sensors and Actuators B: Chemical
Accession number :
edsair.doi...........12d07989b0ab1e757d18469d2ce19779
Full Text :
https://doi.org/10.1016/j.snb.2016.02.120