Abstract
A series of defective MoO2-x/Mo films were prepared by laser modification. Oxygen vacancy defects were introduced to improve the charge transfer efficiency between the probe molecules and the substrate. The formation of nanoparticles on the surface of the laser-treated samples promoted the localized surface plasmon resonance properties, which ultimately induced the enhancement of the local electric field on the sample surface. The dual mechanisms of chemical and electromagnetic enhancement together determine the Raman scattering signal intensity. The as-treated MoO2-x/Mo thin films show good uniformity and reproducibility in surface-enhanced Raman spectroscopy measurements, with detection limits and enhancement factors of 10−9 mol/L and 2.68 × 105 for the dye methylene blue, respectively.The results of the finite-difference-time-domain simulations are in good agreement with the experimental results.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.