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首页> 外文期刊>Electrophoresis: The Official Journal of the International Electrophoresis Society >AC electric field for rapid assembly of nanostructured polyaniline onto microsized gap for sensor devices
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AC electric field for rapid assembly of nanostructured polyaniline onto microsized gap for sensor devices

机译：交流电场，用于将纳米结构聚苯胺快速组装到传感器设备的微小间隙上

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摘要

Interconnected network of nanostructured polyaniline (PANI) is giving strong potential for enhancing device performances than bulk PANI counterparts. For nanostructured device processing, the main challenge is to get prototypes on large area by requiring precision, low cost and high rate assembly. Among processes meeting these requests, the alternate current electric fields are often used for nanostructure assembling. For the first time, we show the assembly of nanostructured PANI onto large electrode gaps (30-60 mu m width) by applying alternate current electric fields, at low frequencies, to PANI particles dispersed in acetonitrile (ACN). An important advantage is the short assembly time, limited to 5-10 s, although electrode gaps are microsized. That encouraging result is due to a combination of forces, such as dielectrophoresis (DEP), induced-charge electrokinetic (ICEK) flow and alternate current electroosmotic (ACEO) flow, which speed up the assembly process when low frequencies and large electrode gaps are used. The main achievement of the present study is the development of ammonia sensors created by direct assembling of nanostructured PANI onto electrodes. Sensors exhibit high sensitivity to low gas concentrations as well as excellent reversibility at room temperature, even after storage in air.
机译：纳米结构聚苯胺（PANI）的互连网络比大量PANI对应物具有增强器件性能的强大潜力。对于纳米结构器件处理，主要挑战是通过要求高精度，低成本和高速率组装来在大面积上获得原型。在满足这些要求的过程中，交流电场通常用于纳米结构的组装。首次，我们通过对分散在乙腈（ACN）中的PANI粒子施加低频交流电，将纳米结构的PANI组装到大的电极间隙（宽度为30-60微米）上。一个重要的优点是组装时间短，限于5-10 s，尽管电极间隙很小。令人鼓舞的结果是由于多种因素的综合作用，例如介电电泳（DEP），感应电荷电动（ICEK）流动和交流电渗（ACEO）流动，当使用低频和较大的电极间隙时，这些装配过程加快了装配过程。本研究的主要成果是通过将纳米结构的PANI直接组装到电极上而开发的氨传感器的开发。即使在空气中存储后，传感器对低气体浓度也具有很高的灵敏度，并且在室温下具有出色的可逆性。

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