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SERS‐Based Plasmon‐Driven Reaction and Molecule Detection on a Single Ag@MoS 2 Microsphere: Effect of Thickness and Crystallinity of MoS 2
Author(s) -
Shen Yunfeng,
Miao Peng,
Hu Chang,
Wu Jie,
Gao Mansha,
Xu Ping
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201800482
Subject(s) - crystallinity , materials science , raman spectroscopy , plasmon , substrate (aquarium) , nanotechnology , particle (ecology) , chemical engineering , optoelectronics , optics , composite material , oceanography , physics , engineering , geology
Plasmon‐driven catalysis on a single particle has attracted great attention in recent years, while the relationship between reaction efficiency and substrate remains to be deeply studied. Here, we demonstrate the fabrication of a novel Ag@MoS 2 core‐shell single particle SERS substrate by coating MoS 2 film on Ag microspheres through the pulsed laser deposition (PLD) technique, where the thickness and crystallinity of MoS 2 can be effectively controlled by the PLD time and temperature. It is revealed that both the thickness and crystallinity of MoS 2 can greatly influence the hot electron transfer process, and thus the plasmon‐driven reaction (4‐NTP into DMAB) efficiency and Raman enhancement of dye molecules on Ag@MoS 2 substrates. Generally, high crystallinity and thin thickness of MoS 2 can lead to accelerated plasmon‐driven reaction efficiency and greatly enhanced Raman signals of target molecules. This study opens up a new avenue for broadening the research area of the plasmon‐driven catalysis and Raman enhancement on the hybrid system of two‐dimensional materials and metal nanostructures.