Molecular Plasmonic Silver Forests for the Photocatalytic-Driven Sensing Platforms

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Flexible and wearable devices require integrating polymers with metal nanoparticles.
• Fabricating flexible plasmonic structures using conventional methods is challenging.
• Plasmonic sensors offer ultrasensitive detection capabilities.

Purpose of the Study:

• To develop flexible 3D plasmonic nanostructure/polymer sensors using a single-step laser process.
• To functionalize these sensors with 4-nitrobenzenethiol (4-NBT) for molecular probing.
• To demonstrate the sensor's capability for ultrasensitive detection and monitoring of biological environments.

Main Methods:

• Fabrication of 3D plasmonic nanostructures/polymer composites via single-step laser processing.
• Functionalization of sensors with 4-nitrobenzenethiol (4-NBT) as a molecular probe.
• Detection and analysis using surface-enhanced Raman spectroscopy (SERS) to track environmental changes.

Main Results:

• Ultrasensitive detection of molecular probes (4-NBT) and their spectral changes in response to environmental perturbations.
• Successful monitoring of prostate cancer cell death over 7 days by detecting changes in the 4-NBT probe's signal.
• Development of electrically conductive composites that withstand over 1000 bending cycles without electrical property degradation.

Conclusions:

• The developed sensor bridges plasmonic sensing with SERS and flexible electronics.
• The technology offers a scalable, energy-efficient, inexpensive, and environmentally friendly approach.
• The sensor shows potential for monitoring cancer treatment processes and advancing flexible electronic devices.