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Microbial Biosensors01:17

Microbial Biosensors

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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
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Related Experiment Video

Updated: May 5, 2026

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level
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Acoustic Bubble Sensing Techniques and Bioapplications.

Renjie Ning1, Jonathan Faulkner1, Mengren Wu2

  • 1Department of Mechanical Engineering, University of Memphis, Memphis, TN 38152, USA.

Biosensors
|February 26, 2026
PubMed
Summary

Acoustic bubbles act as advanced microscale sensors, transforming biological and mechanical signals into remote, label-free measurements. This review explores their physics, sensing capabilities, and biomedical applications for enhanced diagnostics.

Keywords:
acoustic bubblesbioapplicationsbiomechanical sensingbiosensingoscillating bubbles

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Area of Science:

  • Biomedical Engineering
  • Acoustic Physics
  • Biophysics

Background:

  • Microbubbles, initially vascular contrast agents, are now engineered as sophisticated microscale sensors.
  • Their physical dynamics (resonance, oscillations, cavitation) encode crucial physiological information.
  • Sensing is remote, label-free, and clinically compatible, offering significant advantages.

Purpose of the Study:

  • To review the fundamental physics governing acoustic bubble dynamics.
  • To explain how bubble dynamics translate into practical sensing observables.
  • To highlight bioapplications and advantages of acoustic bubble-based sensing.

Main Methods:

  • Summarizing the physics of bubble dynamics.
  • Describing the translation of dynamics into sensing observables.
  • Reviewing bioapplications and advantages.

Main Results:

  • Acoustic bubbles can sense hemodynamic pressure, fluid rheology, oxygenation, and cell mechanics.
  • Key advantages include non-invasive, wireless readout, high sensitivity, and molecular tunability.
  • The review details the physics and practical applications of these advanced sensors.

Conclusions:

  • Acoustic bubbles offer a versatile platform for label-free biosensing.
  • Further development is needed to translate these into robust, quantitative biomedical tools.
  • Future opportunities lie in refining sensing capabilities and expanding clinical applications.