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Label-free Single Molecule Detection Using Microtoroid Optical Resonators
Published on: December 29, 2015
A universal biosensing platform based on optical micro-ring resonators
A Ramachandran1, S Wang, J Clarke
1Nomadics Inc, Stillwater, OK 74074, USA.
Biosensors & Bioelectronics
|October 30, 2007
Summary
This study demonstrates optical micro-ring resonators for rapid, label-free biosensing. The silicon chip platform enables specific detection of bacteria, proteins, and nucleic acids.
Area of Science:
- Optoelectronics
- Nanotechnology
- Biotechnology
Background:
- Optical micro-ring resonators offer a sensitive platform for biosensing.
- High refractive index materials enhance resonator performance.
- Silicon photonics enables miniaturized optical sensing devices.
Purpose of the Study:
- To explore optical micro-ring resonators for quantitative and qualitative biosensing.
- To develop a label-free detection system for biological analytes.
- To assess the specificity and speed of the micro-ring resonator biosensor.
Main Methods:
- Fabrication of vertically coupled, high refractive index micro-ring resonators on silicon chips using photolithography.
- Utilizing a near-infrared broadband light source and optical spectrum analyzer for data acquisition.
- Surface modification of resonators with antibodies and single-stranded DNA oligonucleotides as specific receptors.
Main Results:
- Successful label-free detection of whole bacterial cells.
- Specific and rapid detection of proteins.
- Sensitive detection of nucleic acids using the micro-ring resonator system.
Conclusions:
- Optical micro-ring resonators provide a versatile platform for advanced biosensing.
- The developed system demonstrates high specificity and rapid detection capabilities.
- This technology holds potential for diverse biological and medical diagnostic applications.
