A Novel Ultra-Sensitive Semiconductor SERS Substrate Boosted by the Coupled Resonance Effect.

ABSTRACT: Recent achievements in semiconductor surface-enhanced Raman scattering (SERS) substrates have greatly expanded the application of SERS technique in various fields. However, exploring novel ultra-sensitive semiconductor SERS materials is a high-priority task. Here, a new semiconductor SERS-active substrate, Ta₂O₅, is developed and an important strategy, the "coupled resonance" effect, is presented, to optimize the SERS performance of semiconductor materials by energy band engineering. The optimized Mo-doped Ta₂O₅ substrate exhibits a remarkable SERS sensitivity with an enhancement factor of 2.2 × 10⁷ and a very low detection limit of 9 × 10^-9 m for methyl violet (MV) molecules, demonstrating one of the highest sensitivities a

SUBMITTER: Yang L 

PROVIDER: S-EPMC6662085 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature