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A MXene-Based Wearable Biosensor System for High-Performance In Vitro Perspiration Analysis.

Yongjiu Lei1, Wenli Zhao1, Yizhou Zhang1

  • 1Materials Science and Engineering Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.

Small (Weinheim an Der Bergstrasse, Germany)
|April 9, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new wearable biosensor for sweat analysis, improving durability and sensitivity for glucose and lactate detection. The modular design enhances performance for personalized health monitoring.

Keywords:
MXenebiosensorperspiration analysiswearable device

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Area of Science:

  • Biomedical Engineering
  • Electrochemistry
  • Materials Science

Background:

  • Wearable electrochemical biosensors offer noninvasive sweat analysis for biomarker monitoring.
  • Existing sweat-based sensors face challenges like enzyme degradation, limited sensitivity due to oxygen deficiency, and poor shelf life.
  • Traditional electrode fabrication methods limit the performance and longevity of all-in-one working electrodes.

Purpose of the Study:

  • To develop a stretchable, wearable, and modular multifunctional biosensor for durable and sensitive detection of biomarkers in sweat.
  • To overcome limitations of current sweat sensing technologies through innovative material composites and sensor design.
  • To enable simultaneous measurement of multiple analytes with high sensitivity and repeatability.

Main Methods:

  • Development of a novel MXene/Prussian blue (Ti3C2Tx/PB) composite for the sensing electrode.
  • Implementation of a modular design for easy exchange of specific sensing electrodes.
  • Integration of a solid-liquid-air three-phase interface for enhanced sensor performance and stability.

Main Results:

  • Achieved high electrochemical sensitivities: 35.3 µA mm−1 cm−2 for glucose and 11.4 µA mm−1 cm−2 for lactate in artificial sweat.
  • Demonstrated simultaneous measurement of glucose and lactate levels in human subjects during in vitro perspiration monitoring.
  • Exhibited high sensitivity and good repeatability in real-time sweat analysis.

Conclusions:

  • The developed MXene/Prussian blue composite biosensor offers a durable and sensitive platform for sweat biomarker detection.
  • The modular design and unique interface enhance sensor performance, stability, and versatility for various analytes.
  • This approach represents a significant advancement toward ultrasensitive enzymatic wearable biosensors for personalized health monitoring.