Carbon nanotube (CNT) yarn and fiber-microelectrodes were developed for neurotransmitter detection using fast scan cyclic voltammetry (FSCV). Fibers were made by suspending CNTs in acid/surfactant and extruding into acetone/polyethyleneimine (PEI) and compared to a CNT yarn. They were FSCV frequency independent for dopamine up to 100 Hz. With faster frequencies, up to 500 Hz, high currents are maintained, which allows a 2 ms sampling rate for FSCV, compared to 100 ms. CNT fibers have rough surfaces which trap dopamine and dopamine-o-quinone (DOQ), creating more reversible CVs. CNT yarns and fibers are beneficial for high sensitivity, rapid measurements of neurotransmitters.

中文翻译：

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通信——用于多巴胺高温测量的碳纳米管纤维微电极

开发了碳纳米管 (CNT) 纱线和纤维微电极，用于使用快速扫描循环伏安法 (FSCV) 检测神经递质。通过将碳纳米管悬浮在酸/表面活性剂中并挤出到丙酮/聚乙烯亚胺（PEI）中来制造纤维，并与碳纳米管纱线进行比较。对于高达 100 Hz 的多巴胺，它们的 FSCV 频率无关。通过更快的频率（高达 500 Hz），可以维持高电流，从而允许 FSCV 的采样率为 2 ms，而采样率为 100 ms。CNT 纤维具有粗糙的表面，可以捕获多巴胺和多巴胺邻醌 (DOQ)，从而产生更多可逆的 CV。碳纳米管纱线和纤维有利于神经递质的高灵敏度、快速测量。