Performance Characteristics of Bio-Inspired Metal Nanostructures as Surface-Enhanced Raman Scattered (SERS)...

Area of Science:

• Nanotechnology and Materials Science
• Biophysics and Chemical Sensing

Background:

• High-performance plasmonic nanomaterials are crucial for bio-sensing and trace chemical detection.
• Metal-silicon nanopillar arrays have shown potential as analytical sensors.
• Bio-inspired nanocomposites, particularly those following Fibonacci sequences, offer enhanced and reproducible plasmonic fields.

Purpose of the Study:

• To fabricate bio-inspired nanostructure arrays using electron beam lithography.
• To evaluate the analytical capabilities of these nanostructures using surface-enhanced Raman scattering (SERS).
• To assess the performance of substrates designed with fractal and symmetric patterns for sensing applications.

Main Methods:

• Nanofabrication of 40 µm × 40 µm bio-inspired arrays using electron beam lithography.
• Design classification included asymmetric fractals (sunflower, romanesco broccoli), bilateral symmetry (acacia, honeycomb), and radial symmetry (orchid, lily).
• Surface-enhanced Raman scattering (SERS) was employed for analytical capability evaluation and substrate characterization.

Main Results:

• Successful fabrication of diverse bio-inspired nanostructure arrays.
• Demonstrated substrate characterization and SERS performance of the fabricated arrays.
• The study presents strategies to assess the design performance of these novel plasmonic sensors.

Conclusions:

• Bio-inspired designs, leveraging natural patterns like Fibonacci sequences, can lead to advanced plasmonic nanomaterials.
• Electron beam lithography enables the precise fabrication of these complex nanostructures.
• The developed substrates show potential for sensitive chemical detection via SERS, validating the design strategies.