This paper reports on the performance of a sub-THz liquid sensor tool coupled to a microfluidic platform. Non-invasive, non-destructive and on-line measurements are demonstrated for the determination of ethanol concentration and for controlling bymicromixer device. We have developed a label-free chemical sensing methodology coupling a sub-terahertz sensor technology in microfluidic devices fabricated on glass and polydimethylsiloxane. The concept of sensor in micromixer applications operating at 60 GHz for known ethanol concentration ranging 0% to 100%, with a corresponding dynamic range of 2.79dB. The sensor allowed establishing the correlation between the mass flow rate and the ethanol concentration in the microfluidic system, where two-stream lines form the mixture in laminar flows, with Reynolds number < 13.54 and Peclet number > 25700. We demonstrated on-line sensing and linear control of ethanol concentration on demand with a small variation of 0.32% (v/v) between measured and required ethanol concentration.

Original languageEnglish
Title of host publicationSBMicro 2017 - 32nd Symposium on Microelectronics Technology and Devices
Subtitle of host publicationChip on the Sands, co-located Symposia: 30th SBCCI - Circuits and Systems Design, 2nd INSCIT - Electronic Instrumentation, 7th WCAS - IC Design Cases and 17th SForum - Undergraduate-Student Forum
ISBN (Electronic)9781538628775
Publication statusPublished - 15 Nov 2017
Event32nd Symposium on Microelectronics Technology and Devices (SBMicro Chip on the sands 2017) - Fortaleza, Ceará, Brazil
Duration: 28 Aug 20171 Sep 2017


Conference32nd Symposium on Microelectronics Technology and Devices (SBMicro Chip on the sands 2017)
CityFortaleza, Ceará
Internet address

    Research areas

  • Ethanol concentration, Laminar flow, Linear control of ethanol concentration, Microfluidic device, Passive Micromixer, THz sensor

ID: 35802539