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Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
Published on: February 16, 2018
Submonolayer biolasers for ultrasensitive biomarker detection
Chaoyang Gong1,2, Xi Yang1,3, Shui-Jing Tang3
1Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China.
Researchers developed ultrasensitive, disposable biosensors using submonolayer lasers on optical fibers. These novel devices significantly improve biomarker detection limits for early disease diagnosis, offering high-throughput clinical potential.
Area of Science:
- Biomedical Engineering
- Optical Physics
- Nanotechnology
Background:
- Designing sensitive, single-use biosensors for early disease diagnosis is a critical challenge in healthcare.
- Current biosensor technologies often struggle to achieve the required sensitivity and disposability for widespread clinical application.
Purpose of the Study:
- To develop ultrasensitive and disposable biosensors for early disease diagnosis.
- To explore the potential of submonolayer lasers on optical fibers for biomarker detection.
Main Methods:
- Utilized telecom optical fibers as distributed optical microcavities with high Q-factor.
- Engineered submonolayer lasers on optical fibers for whispering-gallery laser emission.
- Investigated the impact of gain molecule density on sensing performance.
Main Results:
- Achieved a six-order-of-magnitude improvement in the lower limit of detection (LOD) with submonolayer lasers compared to monolayer lasers.
- Demonstrated an ultrasensitive immunoassay for Parkinson's disease biomarker alpha-synuclein (α-syn) with an LOD of 0.32 pM in serum.
- The developed biosensor's LOD is three orders of magnitude lower than α-syn levels in Parkinson's disease patients' serum.
Conclusions:
- Submonolayer lasers on optical fibers represent a breakthrough in ultrasensitive and disposable biosensor technology.
- This approach offers significant potential for high-throughput clinical diagnosis with ultimate sensitivity.
- The developed biosensor technology could revolutionize early disease detection and monitoring.
