The Tunable Parameters of Graphene-Based Biosensors

Area of Science:

• Materials Science
• Nanotechnology
• Biosensing

Background:

• Graphene-based surface plasmon resonance (SPR) biosensors are advanced tools for biomolecule detection.
• Optimizing sensor configurations is crucial for enhancing sensitivity and accuracy.

Purpose of the Study:

• To theoretically analyze graphene-based SPR biosensors with single and bimetallic layers.
• To investigate the influence of metallic substrates (gold, silver) and graphene layers on performance metrics.
• To identify optimal configurations for high-performance biosensing.

Main Methods:

• Comprehensive theoretical analysis of graphene-SPR sensor configurations.
• Evaluation of gold and silver substrates with varying numbers of graphene layers.
• Assessment of sensitivity, detection accuracy, and quality factor.

Main Results:

• Graphene on gold substrates demonstrated superior performance, with up to 30% sensitivity enhancement.
• Silver-supported configurations showed high sensitivity but faced accuracy challenges.
• Reducing metallic layer thickness by 30% improved light coupling and overall performance.

Conclusions:

• Graphene-based SPR biosensors offer significant potential for sensitive and reliable biomolecule detection.
• Gold substrates and optimized metallic layer thickness are key for high-performance SPR biosensors.
• Future research should focus on experimental validation and stability improvements for silver-based systems.