Organic electrochemical transistor arrays for real-time mapping of evoked neurotransmitter release in vivo

Kai Xie, Naixiang Wang, Xudong Lin, Zixun Wang, Xi Zhao, Peiling Fang, Haibing Yue, Junhwi Kim, Jing Luo, Shaoyang Cui, Feng Yan, Peng Shi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

45 Citations (Scopus)


Though neurotransmitters are essential in neural signal transmission, techniques for in vivo analysis are still limited. Here, we describe an organic electrochemical transistor array (OECT-array) technique for monitoring catecholamine neurotransmitters (CA-NTs) in rat brains. The OECT-array is an active sensor with intrinsic amplification capability, allowing real-time and direct readout of transient CA-NT release with a sensitivity of nanomolar range and a temporal resolution of several milliseconds. The device has a working voltage lower than half of that typically used in a prevalent cyclic voltammetry measurement, and operates continuously in vivo for hours without significant signal drift, which is inaccessible for existing methods. With the OECT-array, we demonstrate simultaneous mapping of evoked dopamine release at multiple striatal brain regions in different physiological scenarios, and reveal a complex cross-talk between mesolimbic and nigrostriatal pathways, which is heterogeneously affected by the reciprocal innervation between ventral tegmental area and substantia nigra pars compacta.

Original languageEnglish
Article numbere50345
Publication statusPublished - 11 Feb 2020


  • Brain circuits
  • Dopaminergic signaling
  • Neurotransmitter release
  • Organic electrochemical transistor
  • Organic electronics

ASJC Scopus subject areas

  • General Neuroscience
  • General Immunology and Microbiology
  • General Biochemistry,Genetics and Molecular Biology


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