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Pocketable Biosensor Based on Quartz-Crystal Microbalance and Its Application to DNA Detection.

Hiroshi Yoshimine1, Kai Sasaki1, Hiroyuki Furusawa1,2

  • 1Graduate School of Science and Engineering, Yamagata University, Yonezawa 992-8510, Japan.

Sensors (Basel, Switzerland)
|January 8, 2023
PubMed
Summary
This summary is machine-generated.

A portable, IC card-sized Quartz-Crystal Microbalance (QCM) biosensor was developed. This miniaturized device achieves high sensitivity for DNA detection, similar to benchtop systems, enabling field applications.

Keywords:
DNA hybridizationIC card sizebiosensorquartz-crystal microbalancesingle-base mismatch detection

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Area of Science:

  • Analytical Chemistry
  • Biosensor Technology
  • Nanotechnology

Background:

  • Quartz-Crystal Microbalance (QCM) is a sensitive mass-measurement technique.
  • Existing highly sensitive QCM devices are typically large, benchtop instruments.
  • There is a need for portable, field-deployable QCM biosensors.

Purpose of the Study:

  • To fabricate a portable, battery-powered, IC card-sized QCM device.
  • To demonstrate the device's capability as a label-free biosensor for DNA detection.
  • To evaluate the sensitivity and specificity of the miniaturized QCM biosensor.

Main Methods:

  • Miniaturization of QCM device by repurposing smartphone and wearable electronic components and batteries.
  • Immobilization of receptors on the QCM sensor surface for molecular capture.
  • DNA detection experiments using specific 10-mer DNA chains.

Main Results:

  • Successfully fabricated a portable, IC card-sized QCM device.
  • The device demonstrated high sensitivity in detecting specific 10-mer DNA chains.
  • The QCM biosensor could discern single-base differences, comparable to benchtop devices.

Conclusions:

  • The developed card-sized QCM device offers a portable and sensitive solution for biosensing.
  • This miniaturized QCM technology is suitable for laboratory use and diverse field applications.
  • The device advances the development of accessible, label-free biomolecular detection systems.