公开(公告)号：US20160195488A1

公开(公告)日：2016-07-07

申请号：US14654292

申请日：2013-12-18

Applicant: RESEARCH TRIANGLE INSTITUTE

Inventor： David S. ENSOR ,  Li HAN

IPC: G01N27/12 ,  G01N33/00 ,  G01N27/02

CPC classification number: G01N33/0047 ,  G01N27/127 ,  G01N27/227

Abstract: A chemical sensor and a system and method for sensing a chemical species. The chemical sensor includes a plurality of nanofibers whose electrical impedance varies upon exposure to the chemical species, a substrate supporting and electrically isolating the fibers, a set of electrodes connected to the plurality of fibers at spatially separated points to permit the electrical impedance of the plurality of fibers to be measured, and a membrane encasing the fibers and having a thickness ranging from 50 μm to 5.0 mm. The system includes the chemical sensor, an impedance measuring device coupled to the electrodes and configured to determine an electrical impedance of the plurality of fibers, and an analyzer configured to identify the chemical species based on a change in the electrical impedance. The method measures at least one change in an electrical impedance between spatially separated electrodes connected to a plurality of fibers upon exposure of the fibers to the chemical species, and identifies the chemical species based on the measured change in the electrical impedance.

Abstract translation: 化学传感器和用于感测化学物质的系统和方法。 化学传感器包括多个纳米纤维，其电阻抗暴露于化学物质时变化，支撑和电绝缘纤维的基底，在空间上分离的点连接到多个纤维的一组电极，以允许多个 的待测量纤维，以及包围纤维的膜，其厚度范围为50μm至5.0mm。 该系统包括化学传感器，耦合到电极并被配置为确定多个光纤的电阻抗的阻抗测量装置，以及配置成基于电阻抗的变化来识别化学物种的分析器。 该方法测量当纤维暴露于化学物质时连接到多个纤维的空间分离的电极之间的电阻抗的至少一个变化，并且基于所测量的电阻抗的变化来识别化学物质。