Oligonucleotide-based label-free detection with optical microresonators: strategies and challenges

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Analytical Chemistry

Background:

• Oligonucleotide-based biodetection is crucial for diagnostics.
• Optical biosensors offer sensitive and specific detection methods.
• Whispering gallery mode (WGM) microresonators are promising optical transducer platforms.

Purpose of the Study:

• To review diverse oligonucleotide-based biodetection techniques.
• To focus on WGM optical biosensors integrated with lab-on-a-chip systems.
• To highlight advancements in multiplexed biodetection of nucleic acids and proteins.

Main Methods:

• Review of existing literature on WGM biosensors for biodetection.
• Analysis of lab-on-a-chip and microfluidic integration strategies.
• Examination of surface modification techniques for enhanced specificity.

Main Results:

• WGM optical biosensors integrated with microfluidics enable rapid, robust, and reproducible biodetection.
• These systems facilitate multiplexed detection of various oligonucleotide biomarkers, including DNA and RNA.
• Chemical surface modifications are key for achieving specific and selective biosensing.

Conclusions:

• WGM microresonator-based optical biosensors are highly effective for oligonucleotide biodetection.
• Integration with lab-on-a-chip systems enhances performance for small-volume, multiplexed analyses.
• Further development in surface chemistry will improve specificity and expand applications.