Active Surface-Enhanced Raman Scattering Platform Based on a 2D Material-Flexible Nanotip Array.

ABSTRACT: Two-dimensional materials with a nanostructure have been introduced as promising candidates for SERS platforms for sensing application. However, the dynamic control and tuning of SERS remains a long-standing problem. Here, we demonstrated active tuning of the enhancement factor of the first- and second-order Raman mode of monolayer (1L) MoS₂ transferred onto a flexible metallic nanotip array. Using mechanical strain, the enhancement factor of 1L MoS₂/nanotip is modulated from 1.23 to 8.72 for 2LA mode. For the same mode, the SERS intensity is enhanced by ~31 times when silver nanoparticles of ~13 nm diameter are deposited on 1L MoS₂/nanotip, which is tuned up to ~34 times by compressive strain. The change in SERS enhancement factor is due to the decrease (i

SUBMITTER: Kim YB 

PROVIDER: S-EPMC11674311 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature