A microfluidic sensor for dynamic surface tension measurement

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A microfluidic sensor for dynamic surface tension measurement

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dc.contributor.author Nguyen, Nam-Trung
dc.contributor.author Lassemono, Sumantri
dc.contributor.author Chollet, Franck Alexis
dc.contributor.author Yang, Chun
dc.date.accessioned 2012-05-10T03:06:05Z
dc.date.available 2012-05-10T03:06:05Z
dc.date.copyright 2006
dc.date.issued 2012-05-10
dc.identifier.citation Nguyen, N. T., Lassemono, S., Chollet, F. A. & Yang, C. (2006). A microfluidic sensor for dynamic surface tension measurement. IEE Proceedings - Nanobiotechnology, 153(4), 102-106.
dc.identifier.uri http://hdl.handle.net/10220/7834
dc.description.abstract A novel microfluidic sensor for measuring dynamic gas-liquid interfacial tension is reported. The device consists of a microfluidic chip with a microchannel network and an optical detection system. The sample is introduced into a main channel, while air is injected through a T-junction. Owing to the fixed flow rate ratio used for the sensor, surface tension is the only parameter determining bubble formation frequency, which can be measured by optical detection. Although the bubble is represented by a pulse in the output signal, the formation frequency is simply the frequency of the output signal. Measurements were carried out for aqueous solutions with different concentrations of the ionic surfactant cetyl trimethyl ammonium bromide. Surface tensions of these solutions were calibrated with a commercial tensiometer. The measurement results show a clear relationship between surface tension and formation frequency. The sensor can be used to identify the critical micelle concentration of the surfactant. The sensor potentially allows the use of a minute amount of sample compared with the relatively large amount required for existing commercial systems.
dc.format.extent 21 p.
dc.language.iso en
dc.relation.ispartofseries IEE proceedings - nanobiotechnology
dc.rights © 2006 The Institution of Engineering and Technology. This is the author created version of a work that has been peer reviewed and accepted for publication by IEE proceedings - nanobiotechnology, The Institution of Engineering and Technology. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1049/ip-nbt:20050013.
dc.subject DRNTU::Engineering::Mechanical engineering
dc.title A microfluidic sensor for dynamic surface tension measurement
dc.type Journal Article
dc.contributor.school School of Mechanical and Aerospace Engineering
dc.identifier.doi http://dx.doi.org/10.1049/ip-nbt:20050013
dc.description.version Accepted version
dc.identifier.rims 83248

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