A multilayered microfluidic system with functions for local electrical and thermal measurements

作者：Zhuang, Qianwei; Sun, Weiqiang; Zheng, Yilin; Xue, Jiongwei; Liu, Haixiao; Chen, Mo; Xu, Shengyong^*

来源：Microfluidics and Nanofluidics, 2012, 12(6): 963-970.

DOI：10.1007/s10404-011-0930-2

• Ion conductance
• Microfluidic
• Frequency dependence
• Temperature sensing

Microfluidic systems have been extensively applied in research of chemistry, biology and fluidic dynamics. In these applications, local and precise measurements are often crucial for reliable results. We demonstrate here a multilayered, multifunctional microfluidic platform with embedded electrodes open to the microchannel and thermocouple sensors underneath the microchannel that are suitable for local electrical and thermal measurements, respectively. We demonstrate that precise transport measurements with ac excitation frequency up to 1 MHz can be performed for electrolytes in centimeter-long microchannels. Local temperature sensing of the fluids in the microchannels can also be performed on this system. Such system can be either used to characterize local electrical and thermal properties of fluids, or applied to the study of thermal related electrokinetic phenomena, such as joule heat generation in dc conductance or temperature dependence of electrical transport.

• 出版日期2012-5
• 单位北京大学