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Ultrafast Laser-Ablated Nanoparticles and Nanostructures for Surface-Enhanced Raman Scattering-Based Sensing Applications
Published on: June 16, 2023
Silver nanovoid arrays for surface-enhanced Raman scattering
Xianzhong Lang1, Teng Qiu, Yin Yin
1Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 23, 2012
Summary
Highly ordered silver nanovoid arrays on alumina membranes create cost-efficient surface-enhanced Raman scattering (SERS) substrates. Adjusting topography enables plasmonic tunability for versatile sensing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Spectroscopy
Background:
- Surface-enhanced Raman scattering (SERS) requires efficient substrates.
- Existing SERS substrates face challenges in cost, robustness, and tunability.
- Porous anodic alumina membranes offer a promising platform for nanostructure fabrication.
Purpose of the Study:
- To fabricate highly ordered silver nanovoid arrays on porous anodic alumina membranes.
- To develop robust and cost-efficient SERS substrates.
- To achieve plasmonic tunability for sensing applications.
Main Methods:
- Fabrication of silver nanovoid arrays using controlled anodization voltages.
- Characterization of nanovoid array topography and morphology.
- Evaluation of SERS performance, including enhancement factor and stability.
Main Results:
- Achieved highly ordered silver nanovoid arrays on alumina membranes.
- Demonstrated plasmonic tunability by adjusting anode voltage, altering topography.
- Observed evenly distributed plasmonic fields and high average enhancement factors.
- Exhibited excellent ambient stability due to the natural protective layer of the alumina.
Conclusions:
- The fabricated silver nanovoid arrays serve as robust and cost-efficient SERS substrates.
- The developed method allows for tunable plasmonic properties.
- These SERS substrates are suitable for various sensing device applications.
