Electric impedance spectroscopy using microchannels with integrated metal electrodes
Electric impedance spectroscopy using microchannels with integrated metal electrodes
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DOI：
10.1109/84.749402
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发表时间：
1999-03-01
影响因子：
2.7
通讯作者：
Rabbitt, RD
中科院分区：
文献类型：
--
作者：
Ayliffe, HE;Frazier, AB;Rabbitt, RD
微电阻抗测量系统包含集成金电极的微通道，使电子轰击测量的毫微微升（10（-15））体积的液体或气体。使用空气、部分去离子水和在100 Hz至2 MHz的频率范围内具有各种离子浓度的盐溶液的样品来表征微型仪器。产生的光谱图案作为离子浓度的函数系统地变化。除了工业传感应用，该技术可能被证明是有益的监测微系统利用芯片上的流体化学，测量聚合物溶液的介电分散，并确定隔离的生物材料的电特性。[296]这是一个很好的例子。
Microelectric impedance measurement systems containing microchannels with integrated gold electrodes were fabricated to enable EI measurements of femtoliter (10(-15)) volumes of liquid or gas. The microinstruments were characterized using samples of air, partially deionized water, and saline solutions with various ionic concentrations over the frequency range of 100 Hz to 2 MHz. Resulting spectral patterns varied systemically as a function of ionic concentration. In addition to industrial sensing applications, this technology may prove to be beneficial in monitoring microsystems utilizing on-chip fluid chemistry, measuring the dielectric dispersion of polymer solutions, and determining the electrical properties of isolated biological materials. [296].