Alloy Engineering Allows On-Demand Design of Ultrasensitive Monolayer Semiconductor SERS Substrates

• DOI: 10.1021/acs.nanolett.3c01810
• Publication Date: 2023-07-18T20:41:46Z
• Authors: Xiao Tang; Xingce Fan; Jun Zhou; Shuo Wang; Mingze Li; Xiangyu Hou; Kewei Jiang; Zhenhua Ni; Bei Zhao; Qi Hao; Teng Qiu

The chemical mechanism (CM) of surface-enhanced Raman scattering (SERS) has been recognized as a decent approach to mildly amplify scattering. However, the insufficient charge transfer (CT) between SERS substrate and molecules always results in unsatisfying enhancement, exerting substantial restriction for CM-based SERS. In principle, CT is dominated by coupling energy levels semiconductor-molecule system laser wavelength, whereas precise tuning intrinsically difficult. Herein, two-dimensional transition-metal dichalcogenide alloys, whose can be precisely continuously tuned over wide range simply adjusting their compositions, are investigated. alloys enable on-demand construction resonance channels cater requirements specific target molecule signals highly reproducible, clear view dependences on revealed different terms.