Characterization of channel coating and dimensions of microfluidic-based gas detectors
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- 作者：Mohammad PaknahadAuthor Vitae ; Jannat Singh BachhalAuthor Vitae ; Ali AhmadiAuthor Vitae ; Mina Hoorfar ; mina.hoorfar@ubc.caAuthor Vitae
- 关键词：Microfluidic channel ; Gas diffusion ; Semiconductor gas sensor ; Microfluidic-based gas detector ; Volatile organic compound
- 刊名：Sensors and Actuators B: Chemical
- 出版年：2017
- 出版时间：31 March 2017
- 年：2017
- 卷：241
- 期：Complete
- 页码：55-64
- 全文大小：4841 K
- 卷排序：241
文摘
A 3D-printed microfluidic platform is fabricated by integrating a chemoresistor with a channel. Using a novel coating combination, a surface treatment on the inner walls of the microfluidic channel is carried out, which enhances the selectivity power of the device. Different coating materials are tested and compared to choose the best material in terms of giving the maximum selectivity and the minimum sensor recovery time. The geometry of the channel is then optimized after comparison of the results of sensors fabricated with different channel dimensions. The developed low-cost, portable and highly selective gas detector provides a powerful tool for numerous applications including personal monitoring of exhaled breath for patients suffering from different diseases, biological analysis, safety and environmental monitoring, and analytical chemistry.