Field Effect Transistor-Like Control of Capillaric Flow Using Off-Valves (2022)
An important application area of microfluidics is point-of-care devices. Capillaric circuits are a promising technology to realize such devices. Recently, we introduced a capillary action off-valve which adds preprogrammed autonomous “off”-type valving as a unit operation to capillaric circuits. To date, these devices have only been shown to operate in binary mode. However, due to its conceptual symmetry with electronic junction field effect transistors, it was hypothesized that the off-valve was capable of providing analog resistance control. Using an experimental approach, this work demonstrates for the first time that capillary off-valves can operate in analog resistance mode and that flow control results can be fitted using a modified model of the Shockley transistor equation.
CitationMeffan RC, Mak D, Menges J, Dolamore F, Fee C, Dobson RCJ, Nock V (2022). Field Effect Transistor-Like Control of Capillaric Flow Using Off-Valves. 2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS). 09/01/2022-13/01/2022. 2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS).
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KeywordsCapillary Off-valves; Capillaric Circuits; Point-of-care Testing; Microfluidics
ANZSRC Fields of Research40 - Engineering::4003 - Biomedical engineering::400303 - Biomechanical engineering
40 - Engineering::4003 - Biomedical engineering::400308 - Medical devices
40 - Engineering::4012 - Fluid mechanics and thermal engineering::401203 - Biomedical fluid mechanics
40 - Engineering::4012 - Fluid mechanics and thermal engineering::401210 - Microfluidics and nanofluidics
32 - Biomedical and clinical sciences::3206 - Medical biotechnology::320602 - Medical biotechnology diagnostics (incl. biosensors)
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