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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
- 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.
- Subjects :
- Analyte
Materials science
Hydrogen
Annealing (metallurgy)
Analytical chemistry
chemistry.chemical_element
Nanoparticle
02 engineering and technology
010402 general chemistry
01 natural sciences
symbols.namesake
Materials Chemistry
Electrical and Electronic Engineering
Instrumentation
Quartz
Argon
Metals and Alloys
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry
symbols
0210 nano-technology
Raman spectroscopy
Raman scattering
Subjects
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