Capacitive sensor for continuous monitoring of high-volume droplet microfluidic generation

David Conchouso Gonzalez, Armando Arpys Arevalo Carreno, David Castro, Mincho Kavaldzhiev, Ian G. Foulds

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This paper presents a capacitive sensor for monitoring parallel microfluidic droplet generation. The great electric permittivity difference between common droplet microfluidic fluids such as air, oil and water (ϵoil ≈ 2–3 and ϵwater ≈ 80.4), allows for accurate detection of water in oil concentration changes. Capacitance variations as large as 10 pF between a channel filled with water or dodecane, are used to continuously monitor the output of a parallelization system producing 150 µl/min of water in dodecane emulsions. We also discuss a low cost fabrication process to manufacture these capacitive sensors, which can be integrated to different substrates.
Original languageEnglish (US)
Title of host publication2016 IEEE 11th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages350-353
Number of pages4
ISBN (Print)9781509019472
DOIs
StatePublished - Dec 19 2016

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