Abstract
Surface-enhanced Raman scattering (SERS), as an important tool for interface research, occupies a place in the field of molecular detection and analysis due to its extremely high detection sensitivity and fingerprint characteristics. Substantial efforts have been put into the improvement of the enhancement factor (EF) by way of modifying SERS substrates. Recently, MoS2 has emerged as one of the most promising substrates for SERS, which is also exploited as a complementary platform on the conventional metal SERS substrates to optimize the properties. In this minireview, the fundamentals of MoS2-related SERS are first explicated. Then, the synthesis, advances and applications of MoS2-based substrates are illustrated with special emphasis on their practical applications in food safety, biomedical sensing and environmental monitoring, together with the corresponding challenges. This review is expected to arouse broad interest in nonplasmonic MoS2-related materials along with their mechanisms, and to promote the development of SERS studies.
Highlights
Raman Scattering: Fundamentals, Surface-enhanced Raman scattering (SERS) is an effective spectroscopic technique for the detection and analysis of molecules adsorbed on rough metal surfaces or other nanostructures with high sensitivity and accuracy [1]
In preparing MoS2 nanosheet films by the chemical vapor deposition (CVD) method, Mo is first sputtered on SiO2 substrate, MoS2 nanometerthin films are grown on the surface through the reaction between Mo and sulfur vapor in the furnace
With the development of chemical mechanisms, SERS substrate material is not confined to metal, and MoS2 emerges as a promising substrate material owing to its distinct merits shown in SERS studies
Summary
Raman Scattering: Fundamentals, SERS is an effective spectroscopic technique for the detection and analysis of molecules adsorbed on rough metal surfaces or other nanostructures with high sensitivity and accuracy [1]. There are two main ideas to improve detection accuracy and expand the application scope of metal substrate for SERS: (1) moving concentration from precious metals to transition metal nanoarrays [9–12] and (2) changing the configuration and shape of Au/Ag nanoparticles (Au/Ag NPs) [13,14], such as Au nanocube array [15], concave–convex nanostructure array [16], checkerboard nanostructure [17], among others [18,19] (Figure 1b). Wesubstrates begin by for introducing thesome fundamentals of SERS, including two Several such as gold, silver and copper [7,8].
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