Lithographically-defined 3D porous networks as active substrates for surface enhanced Raman scattering

Area of Science:

• Materials Science
• Nanotechnology
• Analytical Chemistry

Background:

• Surface-Enhanced Raman Scattering (SERS) requires highly sensitive substrates.
• Developing cost-effective and efficient SERS substrates is crucial for widespread application.
• Porous carbon materials offer unique structural and electronic properties.

Purpose of the Study:

• To investigate the efficacy of interferometrically fabricated porous carbon as SERS substrates.
• To quantify the enhancement factors achieved by these novel substrates.
• To explore the potential of these materials in advanced sensing applications.

Main Methods:

• Fabrication of porous carbon substrates using interferometric lithography.
• Characterization of substrate morphology and surface properties.
• Evaluation of SERS performance using model analytes and laser excitation.

Main Results:

• Interferometric lithography successfully produced porous carbon structures.
• Achieved SERS enhancement factors in the range of 7 to 9 orders of magnitude.
• Demonstrated the suitability of these substrates for sensitive molecular detection.

Conclusions:

• Interferometrically fabricated porous carbon represents a promising platform for SERS.
• The high enhancement factors indicate excellent potential for sensitive chemical sensing.
• This approach offers a scalable method for producing advanced SERS substrates.