Despite extensive research on nanowires and nanosensors, the lack of manufacturing methods limits nanosensor commercialization. Here a new way of making nanowire sensors is demonstrated. Nanowire crystals of charge‐transfer salt, tetrathiafulvalene bromide or (TTF)Br, are electrochemically deposited across lines of microelectrodes made by photolithography to complete the sensor circuitry. A novel concept is the direct synthesis of nanowires on sensor substrates using pre‐existing patterns to direct the nanowire nucleation and crystallization. The gas sensing capability of the nanowire assembly is demonstrated for the detection of ammonia at a concentration range of 1–100 ppm by measuring the changes in its electrical impedance. The selectivity toward ammonia against water vapor, one of the most persistent challenges for wide adoption of nanosensors for gas detection, can be tuned by (TTF)Br nanowire chemical composition during synthesis. This work demonstrates a proof of concept toward scalable manufacturing of nanosensor devices via one‐step, substrate‐directed nucleation and crystallization.

中文翻译：

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微电极图案上电荷转移盐纳米传感器的一步合成

尽管对纳米线和纳米传感器进行了广泛的研究，但是缺乏制造方法限制了纳米传感器的商业化。这里展示了一种制造纳米线传感器的新方法。电荷转移盐，四硫富瓦烯溴化物或（TTF）Br的纳米线晶体电化学沉积在由光刻法制成的微电极线之间，以完成传感器电路。一个新颖的概念是使用预先存在的图案直接在传感器基板上合成纳米线，以指导纳米线的成核和结晶。通过测量纳米线组件的电阻抗变化，可以检测浓度范围为1–100 ppm的氨，从而具有气体感应功能。对氨对水蒸气的选择性，在合成过程中，（TTF）Br纳米线的化学成分可以解决纳米传感器广泛用于气体检测的最持久的挑战之一。这项工作证明了通过一步法，以基底为导向的成核作用和结晶作用可扩展制造纳米传感器装置的概念证明。