期刊
NANO RESEARCH
卷 11, 期 4, 页码 2181-2189出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1836-4
关键词
Ag nanowire-nanoparticle; MoS2 monolayer; surface-enhanced Raman scattering (SERS); polarization dependence
类别
资金
- National Natural Science Foundation of China [11274395]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13042]
- Open Fund of the Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications (Jinan University)
Developing well-defined nanostructures with superior surface-enhanced Raman scattering (SERS) performance is a critical and highly desirable goal for the practical applications of SERS in sensing and analysis. Here, a SERS-active substrate was fabricated by decorating a MoS2 monolayer with Ag nanowire (NW) and nanoparticle (NP) structures, using a spin-coating method. Both experimental and theoretical results indicate that strong SERS signals of rhodamine 6G (R6G) molecules can be achieved at hotspots formed in the Ag NW-Ag NP-MoS2 hybrid structure, with an enhancement factor of 10(6). The SERS enhancement is found to be strongly polarization dependent. The fabricated SERS substrate also exhibits ultrasensitive detection capabilities with a detection limit of 10(-11) M, as well as reliable reproducibility and good stability.
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