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Related Concept Videos

Clinical Applications of Epidermal Stem Cells01:19

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Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
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Fabrication and Characterization of a Conformal Skin-like Electronic System for Quantitative, Cutaneous Wound Management
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A Self-Healable Bifunctional Electronic Skin.

Zhiyi Gao1,2, Zheng Lou1, Wei Han2

  • 1State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing 100083, China.

ACS Applied Materials & Interfaces
|May 6, 2020
PubMed
Summary
This summary is machine-generated.

This study presents a self-healing electronic skin (e-skin) that can sense both pressure and temperature. The innovative e-skin demonstrates remarkable recovery after damage, maintaining its sensing capabilities for future applications.

Keywords:
bifunctionalintegratingpressure sensorself-recoverytemperature sensor

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Mimicking human skin's sensory and self-recovery functions in electronic devices presents significant challenges.
  • Developing electronic skin (e-skin) requires materials with excellent elasticity, flexibility, and self-healing properties.

Purpose of the Study:

  • To develop a bifunctional, self-healing e-skin capable of detecting both pressure and temperature stimuli.
  • To integrate sensing materials and a robust substrate for enhanced e-skin performance.

Main Methods:

  • Fabrication of a self-healing e-skin using polyurethane (PU) and polyurethane@multiwalled carbon nanotubes (PU@CNT) as sensing materials.
  • Integration of a resistance temperature sensor atop a capacitive pressure sensor on a cellulose nanocrystals@carboxylated nitrile rubber@polyethylenimine (CNC@XNBR) substrate.
  • Characterization of sensor response, self-healing ability, and performance after damage.

Main Results:

  • Each sensor type demonstrated selective and rapid responses to target stimuli (pressure or temperature).
  • The e-skin exhibited significant self-healing capabilities due to the inherent properties of PU and the CNC@XNBR substrate.
  • The healed e-skin retained excellent sensitivity to both temperature and pressure, showcasing durability.
  • A 5x5 device array successfully achieved simultaneous imaging of pressure and temperature distribution.

Conclusions:

  • The developed bifunctional e-skin successfully mimics human skin's sensory and self-healing capabilities.
  • The integration of PU, PU@CNT, and CNC@XNBR provides a promising platform for advanced self-healing electronic devices.
  • The ability to simultaneously image pressure and temperature distributions opens avenues for complex human-machine interfaces.