Glucose Level Sensing Using Single Asymmetric Split Ring Resonator

Area of Science:

• Metamaterials
• Biosensing Technology
• Electromagnetics

Background:

• Accurate glucose monitoring is crucial for managing diabetes.
• Existing biosensing methods face challenges in sensitivity and sample volume.
• Metamaterials offer unique electromagnetic properties for enhanced sensing applications.

Purpose of the Study:

• To design and validate a metamaterial asymmetric resonator biosensor for glucose level detection.
• To investigate the biosensor's performance using small sample volumes (1 µL).
• To assess the biosensor's sensitivity and accuracy across a range of glucose concentrations.

Main Methods:

• Fabrication of a single metamaterial asymmetric resonator with a semicircular gap.
• Application of glucose solutions (41–312 mg/dL) to the resonator.
• Measurement of resonance frequency shifts in response to varying glucose concentrations.
• Analysis of transmission amplitude and coefficient of determination for model fitting.

Main Results:

• The biosensor accurately detected glucose concentrations from hypoglycemia to hyperglycemia.
• Resonance frequency redshift directly correlated with increased glucose levels.
• A high coefficient of determination (0.9997) indicated excellent prediction fitting.
• The biosensor achieved a remarkable sensitivity of 438 kHz/(mg/dL).

Conclusions:

• The developed metamaterial biosensor offers a highly sensitive and accurate method for glucose sensing.
• The unique resonator design enhances electromagnetic wave-matter interaction for improved performance.
• This technology holds promise for advanced glucose monitoring systems.