Impedance-based response of an electrolytic gas bubble to pressure in microfluidic channels
Impedance-based response of an electrolytic gas bubble to pressure in microfluidic channels
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电解气泡对微流体通道中压力的基于阻抗的响应
DOI：
10.1016/j.sna.2005.06.006
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发表时间：
2005
影响因子：
4.6
通讯作者：
S. Hua
中科院分区：
文献类型：
--
作者：
Daniel A. Ateya;A. Shah;S. Hua
在本文中，我们电测量了电解气泡对微流体通道中不同压力的响应。阻抗测量用于监测电解气泡的体积或体积变化。实验结果表明，气泡大小和气泡溶解速率对施加的压力都很敏感，并且可以很容易地在流体通道中测量。研究了气泡在101.3 ~ 112.7kPa压力下的响应特性。测试了不同的表面润湿性，结果表明，在微流体通道中，固液气界面的表面无能对测量的响应起重要作用。结果提供了一种利用电解气泡在微流体系统中进行压力或流量传感的电测量方法。
In this paper we have electrically measured the response of electrolytic gas bubbles to varying pressures in a microfluidic channel. Impedance measurements were used to monitor either the volume or volume change of an electrolytic bubble. Experimental results show that both the bubble size and bubble dissolution rate are sensitive to the applied pressure, and can be readily measured in the fluidic channel. The bubble response to pressures ranging from 101.3 (1atm) to 112.7kPa was characterized. Various surface wettabilities were tested, and results show that in a microfluidic channel surface-free energies at the solid–liquid–gas interfaces play an important role in the measured response. Results provide an electrical measurement approach towards pressure or flow rate sensing in microfluidic systems using electrolytic gas bubbles.