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Article

Complementary Split-Ring Resonator-Loaded Microfluidic Ethanol Chemical Sensor

School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul 156-756, Korea
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Author to whom correspondence should be addressed.
Academic Editors: Amine Miled and Jesse Greener
Sensors 2016, 16(11), 1802; https://doi.org/10.3390/s16111802
Received: 4 August 2016 / Revised: 5 October 2016 / Accepted: 22 October 2016 / Published: 28 October 2016
(This article belongs to the Special Issue Microfluidics-Based Microsystem Integration Research)
In this paper, a complementary split-ring resonator (CSRR)-loaded patch is proposed as a microfluidic ethanol chemical sensor. The primary objective of this chemical sensor is to detect ethanol’s concentration. First, two tightly coupled concentric CSRRs loaded on a patch are realized on a Rogers RT/Duroid 5870 substrate, and then a microfluidic channel engraved on polydimethylsiloxane (PDMS) is integrated for ethanol chemical sensor applications. The resonant frequency of the structure before loading the microfluidic channel is 4.72 GHz. After loading the microfluidic channel, the 550 MHz shift in the resonant frequency is ascribed to the dielectric perturbation phenomenon when the ethanol concentration is varied from 0% to 100%. In order to assess the sensitivity range of our proposed sensor, various concentrations of ethanol are tested and analyzed. Our proposed sensor exhibits repeatability and successfully detects 10% ethanol as verified by the measurement set-up. It has created headway to a miniaturized, non-contact, low-cost, reliable, reusable, and easily fabricated design using extremely small liquid volumes. View Full-Text
Keywords: ethanol sensor; microfluidic channel; complementary split ring resonator (CSRR); patch ethanol sensor; microfluidic channel; complementary split ring resonator (CSRR); patch
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MDPI and ACS Style

Salim, A.; Lim, S. Complementary Split-Ring Resonator-Loaded Microfluidic Ethanol Chemical Sensor. Sensors 2016, 16, 1802. https://doi.org/10.3390/s16111802

AMA Style

Salim A, Lim S. Complementary Split-Ring Resonator-Loaded Microfluidic Ethanol Chemical Sensor. Sensors. 2016; 16(11):1802. https://doi.org/10.3390/s16111802

Chicago/Turabian Style

Salim, Ahmed, and Sungjoon Lim. 2016. "Complementary Split-Ring Resonator-Loaded Microfluidic Ethanol Chemical Sensor" Sensors 16, no. 11: 1802. https://doi.org/10.3390/s16111802

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