Label-free detection with the liquid core optical ring resonator sensing platform.

Area of Science:

• Photonics
• Biomedical Engineering
• Analytical Chemistry

Background:

• Traditional bio/chemical detection methods often rely on costly and complex labeling techniques (fluorescence, radioisotopes).
• Label-free detection offers a more streamlined and cost-effective approach, providing accurate quantitative and kinetic data.
• Existing optical sensors may face limitations in integration with microfluidic systems.

Purpose of the Study:

• To develop and present a novel optical label-free sensor system.
• To demonstrate the integration of optical ring resonator sensors within a microfluidic platform.
• To achieve high-sensitivity detection of liquid samples and analytes.

Main Methods:

• Development of the liquid core optical ring resonator (LCORR) sensor.
• Integration of optical ring resonator sensors into a microfluidic system using thin-walled glass capillaries.
• Utilizing refractive index changes for detection of liquid samples and analytes.

Main Results:

• The LCORR sensor successfully performs label-free detection of liquid samples.
• Demonstrated high sensitivity for bio/chemical analyte detection, reaching limits of detection on the scale of picograms per square millimeter (pg/mm2).
• The integrated microfluidic design facilitates efficient sample delivery and sensing.

Conclusions:

• The liquid core optical ring resonator (LCORR) represents a significant advancement in optical label-free detection technology.
• LCORR sensors provide a cost-effective and sensitive platform for quantitative and kinetic analysis.
• This technology has potential applications in various fields requiring precise bio/chemical analysis.