期刊
APPLIED PHYSICS LETTERS
卷 110, 期 23, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4984897
关键词
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资金
- Singapore Maritime Institute (SMI), under the Maritime Sustainability RD Programme [SMI-2015-MA-10]
We present a microfluidic impedance device for achieving both the flow ratio sensing and the conductivity difference detection between sample stream and reference buffer. By using a flow focusing configuration, with the core flow having a higher conductivity sample than the sheath flow streams, the conductance of the device varies linearly with the flow ratio, with R-2 > 0.999. On the other hand, by using deionized (DI)-water sheath flow as a reference, we can detect the difference in conductivity between the buffer of core flow and sheath DI-water with a high detection sensitivity of up to 1 nM of sodium chloride solution. Our study provides a promising approach for on-chip flow mixing characterization and bacteria detection. Published by AIP Publishing.
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