A Discolorable Flexible Synaptic Transistor for Wearable Health Monitoring

Cui Sun, Xuerong Liu, Quanxing Yao, Qian Jiang, Xiangling Xia, Youfeng Shen, Xiaoyu Ye, Hongwei Tan, Runsheng Gao, Xiaojian Zhu*, Run Wei Li*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)


Multifunctional intelligent wearable electronics, providing integrated physiological signal analysis, storage, and display for real-time and on-site health status diagnosis, have great potential to revolutionize health monitoring technologies. Advanced wearable systems combine isolated digital processor, memory, and display modules for function integration; however, they suffer from compatibility and reliability issues. Here, we introduce a flexible multifunctional electrolyte-gated transistor (EGT) that integrates synaptic learning, memory, and autonomous discoloration functionalities for intelligent wearable application. This device exhibits synergistic light absorption coefficient changes during voltage-gated ion doping that modulate the electrical conductance changes for synaptic function implementation. By adaptively changing color, the EGT can differentiate voltage pulse inputs with different frequency, amplitude, and duration parameters, exhibiting excellent reversibility and reliability. We developed a smart wearable monitoring system that incorporates EGT devices and sensors for respiratory and electrocardiogram signal analysis, providing health warnings through real-time and on-site discoloration. This study represents a significant step toward smart wearable technologies for health management, offering health evaluation through intelligent displays.

Original languageEnglish
Pages (from-to)515-525
Number of pages11
JournalACS Nano
Issue number1
Early online date2023
Publication statusPublished - 9 Jan 2024
MoE publication typeA1 Journal article-refereed


  • discoloration
  • electrolyte-gated transistor
  • poly(3-hexylthiophene)
  • smart wearable electronics
  • synaptic plasticity


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