Phase Transformation on Two-Dimensional MoTe₂ Films for Surface-Enhanced Raman Spectroscopy.

ABSTRACT: Two-dimensional (2D) transition metal dichalcogenides (TMDs) have recently become attractive candidate substrates for surface-enhanced Raman spectroscopy (SERS) owing to their atomically flat surfaces and adjustable electronic properties. Herein, large-scale 2D 1T'- and 2H-MoTe₂ films were prepared using a chemical vapor deposition method. We found that phase structure plays an important role in the enhancement of the SERS performances of MoTe₂ films. 1T'-MoTe₂ films showed a strong SERS effect with a detection limit of 1 × 10^-9 M for the R6G molecule, which is one order of magnitude lower than that of 2H-MoTe₂ films. We demonstrated that the SERS sensitivity of MoTe₂ films is derived from the efficient photoinduced charge t

SUBMITTER: Zhao C 

PROVIDER: S-EPMC11547442 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature