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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
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Vanadium dioxide nanostructures with remarkable surface-enhanced Raman scattering activity.

Haomin Guan1, Zheng Tian2, Qinghong Kong3

  • 1School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China. kongqh@mail.ujs.edu.cn and Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine, No. 11, Ronghua South Road, Beijing 100176, P. R. China. xiguangcheng@caiq.gov.cn.

Chemical Communications (Cambridge, England)
|May 13, 2021
PubMed
Summary

Highly rough vanadium dioxide (VO2) nanospheres were synthesized to create a sensitive surface-enhanced Raman spectroscopy (SERS) substrate. This novel SERS substrate demonstrates excellent performance for detecting Rhodamine 6G at low concentrations.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Controlling material structure and size is crucial for enhancing sensitivity.
  • Vanadium dioxide (VO2) is a material with potential for advanced applications.
  • Surface-enhanced Raman spectroscopy (SERS) requires highly sensitive substrates.

Purpose of the Study:

  • To synthesize rough VO2 nanospheres and nanostars.
  • To evaluate the SERS performance of the synthesized VO2 nanostructures.
  • To investigate the relationship between surface morphology and SERS sensitivity.

Main Methods:

  • Synthesis of rough VO2 (D) nanostars and nanospheres.
  • Characterization of surface morphology and properties.
  • Testing SERS activity using Rhodamine 6G as a probe molecule.

Main Results:

  • Successfully synthesized VO2 (D) nanospheres with highly dense and rough surfaces.
  • Demonstrated high adsorption and strong plasma resonance properties of the nanospheres.
  • Achieved a low detection limit of 10-9 M for Rhodamine 6G using the VO2 SERS substrate.

Conclusions:

  • Rough VO2 nanospheres serve as highly sensitive SERS substrates.
  • Surface roughness and plasma resonance contribute to enhanced SERS activity.
  • The developed semiconductor SERS substrate shows significant potential for trace detection.