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FPGA Integrated Optofluidic Biosensor for Real-Time Single Biomarker Analysis.

Mohammad Julker Neyen Sampad1, Md Nafiz Amin1, Aaron R Hawkins2

  • 1School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064 USA.

IEEE Photonics Journal
|December 13, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a rapid optofluidic biosensor for sensitive, amplification-free detection of single molecules, crucial for infectious disease diagnostics like COVID-19. The system provides real-time analysis, enabling quick identification of pathogens at the point of care.

Keywords:
Optofluidicsanti-resonant reflecting optical waveguide (ARROW)biophotonicsfield programmable gate array (FPGA)real-timesingle molecule detection

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Area of Science:

  • Optofluidics
  • Biosensing
  • Molecular Diagnostics

Background:

  • Sensitive, amplification-free detection of single molecules is needed for infectious disease control.
  • Current methods often require complex post-experiment analysis.
  • Optofluidic biosensors offer a potential solution for rapid diagnostics.

Purpose of the Study:

  • To demonstrate a rapid sample-to-answer optofluidic biosensor for single molecule detection.
  • To enable live monitoring and analysis of fluorescence on an optofluidic chip.
  • To validate the sensor's performance for clinically relevant concentrations and point-of-care applications.

Main Methods:

  • Utilized an integrated optofluidic chip with a field-programmable gate array (FPGA) for real-time data processing.
  • Employed single particle fluorescence analysis to detect fluorescent nanobeads and bacterial plasmid DNA.
  • Developed a scheme for rapid sample-to-answer analysis without post-experiment data extraction.

Main Results:

  • Achieved 99% accuracy in detecting fluorescent nanobeads.
  • Quantified particle concentrations in clinically relevant ranges (3.4×10^4 to 3.4 × 10^6/ml) within minutes.
  • Demonstrated real-time monitoring of experimental parameters like flow rate.
  • Successfully detected single bacterial plasmid DNA at attomolar concentrations.

Conclusions:

  • The developed optofluidic biosensor provides a sensitive, rapid, and amplification-free method for single molecule detection.
  • The system's real-time analysis capabilities and accuracy show significant promise for point-of-care (POC) diagnostic tools.
  • This technology can aid in the rapid containment of infectious diseases through efficient diagnostics.