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Related Experiment Video

Updated: Sep 13, 2025

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

Published on: May 23, 2018

Vanadium pentoxide decorated with gold as a reliable platform for surface-enhanced Raman spectroscopy.

David Novák¹, Aleš Socha², Eva Kočišová¹

¹Charles University, Faculty of Mathematics and Physics, Institute of Physics, 121 16, Prague 2, Czech Republic.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy

|July 31, 2025

Summary

This study enhances surface-enhanced Raman scattering (SERS) using vanadium pentoxide (V2O5) nanostructures decorated with gold (Au). The V2O5/Au substrates achieve a 1200-fold SERS enhancement for sensitive molecular detection.

Keywords:

Charge-transfer Electromagnetic mechanism Gold Plasma-based deposition SERS Vanadium pentoxide

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Area of Science:

Materials Science
Spectroscopy
Nanotechnology

Background:

Semiconductor materials like vanadium pentoxide (V2O5) show potential for surface-enhanced Raman scattering (SERS) but have limited enhancement.
Combining V2O5 with plasmonic noble metallic nanostructures is a strategy to improve SERS performance.

Purpose of the Study:

To investigate the SERS enhancement of thin V2O5 nanostructural films decorated with gold (V2O5/Au).
To optimize the fabrication of V2O5/Au substrates for improved SERS sensitivity and reliability.

Main Methods:

Fabrication of V2O5/Au nanostructural films using sputter deposition and thermal annealing.
Characterization of SERS enhancement mechanisms (electromagnetic and chemical).
Optimization of gold deposition time for maximum SERS signal.

Main Results:

V2O5/Au substrates exhibited a significant SERS enhancement compared to V2O5 alone.
A 1200-fold SERS enhancement was achieved with optimized gold deposition (240 s).
Spectral mapping showed a relative standard deviation (RSD) below 35% for reliable detection.

Conclusions:

The V2O5/Au nanostructural films effectively enhance SERS signals through combined electromagnetic and chemical effects.
Optimized V2O5/Au substrates are suitable for sensitive detection of molecules like methylene blue, TMPyP, and BPy.
These substrates offer a promising platform for advanced SERS applications.