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Microbial Biosensors01:17

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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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Wearable Self-Powered Biomedical Smart Sensors Deriving from E-Waste.

Wencheng Li1, Jianxin Zhang1, Wenrui Zhang1

  • 1Cancer Hospital of Dalian University of Technology, School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China.

Nano Letters
|June 15, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed eco-friendly transient MXene film-based supercapacitors for wearable sensors. These flexible power sources degrade into harmless residuals, addressing electronic waste concerns for sustainable self-powered biomedical devices.

Keywords:
biomedical sensorshealthcare monitoringself-powered sensorstransient power sourcewearable sensors

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Area of Science:

  • Materials Science
  • Electronics Engineering
  • Environmental Science

Background:

  • Wearable sensors require efficient power sources, often relying on miniaturized energy-storage devices (MESDs).
  • The widespread use of MESDs raises significant electronic waste (e-waste) concerns due to their environmental impact.
  • Transient electronics offer a sustainable alternative by degrading into eco-friendly byproducts.

Purpose of the Study:

  • To develop flexible, e-waste-friendly power sources for wearable, self-powered biomedical sensors.
  • To create transient MXene film-based supercapacitors (TMFSCs) with good energy storage and mechanical flexibility.
  • To demonstrate the application of TMFSCs in a wearable sensor for real-time pulse monitoring.

Main Methods:

  • Fabrication of flexible transient MXene film-based supercapacitors (TMFSCs).
  • Evaluation of energy storage capability and mechanical flexibility of TMFSCs.
  • Assessment of the degradation characteristics of TMFSCs into eco-friendly residuals.
  • Integration of TMFSCs into a wearable self-powered biomedical smart sensor for pulse signal monitoring.

Main Results:

  • TMFSCs demonstrated good energy storage capacity and mechanical flexibility.
  • The developed TMFSCs completely degraded into eco-friendly residuals within minutes.
  • A functional wearable self-powered biomedical smart sensor utilizing TMFSCs was successfully demonstrated.
  • The sensor enabled real-time monitoring of pulse signals for health evaluation.

Conclusions:

  • TMFSCs represent a promising solution for sustainable, flexible, and e-waste-friendly miniaturized energy-storage devices.
  • These transient power sources are competitive for next-generation wearable and portable sensing electronics.
  • The developed system supports the advancement of eco-friendly self-powered biomedical monitoring systems.