Towards low-cost flexible substrates for nanoplasmonic sensing

Area of Science:

• Nanotechnology and Materials Science
• Plasmonics and Nanophotonics
• Sensing and Spectroscopy

Background:

• Plasmonic nanostructures concentrate light at the nanoscale, enabling sensitive detection.
• Controlled adsorption of nanoparticles onto substrates is key for nanoplasmonic device fabrication.
• Electromagnetic field amplification by nanoparticles enhances device performance.

Purpose of the Study:

• To summarize recent advancements in fabricating flexible nanoplasmonic devices for sensing.
• To explore the use of surface-enhanced Raman scattering (SERS) and localized surface plasmon resonance (LSPR) shifts in these devices.
• To highlight the potential for low-cost, large-scale production of flexible nanoplasmonic sensors.

Main Methods:

• Utilized various flexible substrates including filter paper, nanofibres, elastomers, plastics, carbon nanotubes, and graphene.
• Employed techniques such as solution processes, physical vapor deposition, and lithography for nanoparticle impregnation.
• Focused on fabrication methods for integrating plasmonic nanoparticles onto diverse flexible materials.

Main Results:

• Demonstrated the feasibility of fabricating flexible nanoplasmonic devices on multiple substrate types.
• Showcased the application of SERS and LSPR shifts for sensing capabilities.
• Confirmed that these devices can be produced at a relatively low cost and on a large scale.

Conclusions:

• Highly sensitive and reproducible flexible plasmonic devices are achievable.
• Low-cost, large-scale fabrication methods are available for these advanced sensors.
• These flexible nanoplasmonic devices are poised for real-world applications in diagnostics and detection.