循环伏安法
材料科学
检出限
跨导
晶体管
纳米技术
再现性
门控
多巴胺
电极
电化学
化学
生物物理学
神经科学
生物
色谱法
电压
量子力学
物理化学
物理
作者
Weiqi Li,Jing Jin,Tianyi Xiong,Ping Yu,Lanqun Mao
标识
DOI:10.1002/anie.202204134
摘要
Developing techniques for the highly sensitive assay of neurotransmitters is essential for understanding physiological and pathological processes. Here, we demonstrate a fast-scanning potential (FSP)-gated organic electrochemical transistor (OECT): for the highly sensitive sensing of dopamine (DA) in a living rat brain. The configuration combines the selectivity of fast-scan cyclic voltammetry (FSCV) with the high sensitivity of an OECT. The combined use of FSP as a gating mode and transconductance (gm ) as a sensing parameter further improve the sensing performance in terms of sensitivity, limit of detection, reproducibility, and stability. The FSP-OECT exhibits a sensitivity of 0.899 S M-1 and a low limit of detection down to 5 nM and was validated for in vivo monitoring of the basal level and electrically stimulated release of DA.
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