New Gas Sensors Patterned with Conducting Polymer

An improved method for depositing nanoporous, conducting polymer films on miniaturized device features has been demonstrated by researchers at theNational Institute of Standards and Technology (NIST)

在4月6日发行的《杂志》美国化学学会,该方法可能是可重复制造微型版本(例如用于检测有毒化学物质的传感器)的一般技术。

Unlike most polymers, conducting polymers have the electrical and optical properties of metals or semiconductors. These materials are of increasing interest in microelectronics because they are inexpensive, flexible and easy to synthesize.

聚苯胺是微电子应用的特别有前途的导电聚合物,但是很难处理,因为它在大多数溶剂中不会溶解。NIST的研究人员通过将聚苯胺的纳米级颗粒分散到温和的溶剂中来规避了这一问题。欧洲杯猜球平台

"The beauty of the method," says NIST guest researcher Guofeng Li, "is that the polyaniline chain carries a natural positive charge." Once the particles are formed, electrostatic repulsion prevents them from clumping together. Moreover, the positively charged particles then can be manipulated and patterned on complex device structures by applying an electrical field.

该过程产生了有效捕获气态分子的海绵样涂层。到目前为止,NIST研究人员已经证明,这种涂层可以检测甲醇和水蒸气之间的差异。在将聚合物设备用于检测有毒气体之前,需要进行其他测试。

NIST使用涂有纳米结构锡氧化物膜的微型捕捞器持有以前的工作专利。随着微助体在一系列温度中循环,电阻的变化被用来以每十亿水平的一部分检测有毒气体。最终,NIST的研究人员希望开发出廉价的微热仪传感器,这些传感器涂有聚合物和无机氧化物膜,以识别气体混合物的成分。

http://www.nist.gov/

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