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Type: Journal article
Title: High-sensitivity metamaterial-inspired sensor for microfluidic dielectric characterization
Author: Ebrahimi, A.
Withayachumnankul, W.
Al-Sarawi, S.
Abbott, D.
Citation: IEEE Sensors Journal, 2014; 14(5):1345-1351
Publisher: The Institute of Electrical and Electronic Engineers Inc.
Issue Date: 2014
ISSN: 1530-437X
Statement of
Amir Ebrahimi, Withawat Withayachumnankul, Said Al-Sarawi and Derek Abbott
Abstract: A new metamaterial-inspired microwave microfluidic sensor is proposed in this paper. The main part of the device is a microstrip coupled complementary split-ring resonator (CSRR). At resonance, a strong electric field will be established along the sides of CSRR producing a very sensitive area to a change in the nearby dielectric material. A micro-channel is positioned over this area for microfluidic sensing. The liquid sample flowing inside the channel modifies the resonance frequency and peak attenuation of the CSRR resonance. The dielectric properties of the liquid sample can be estimated by establishing an empirical relation between the resonance characteristics and the sample complex permittivity. The designed microfluidic sensor requires a very small amount of sample for testing since the cross-sectional area of the sensing channel is over five orders of magnitude smaller than the square of the wavelength. The proposed microfluidic sensing concept is compatible with lab-on-a-chip platforms owing to its compactness.
Keywords: Complementary split-ring resonator (CSRR); dielectric characterization; metamaterial; microfluidic sensor.
Rights: © 2013 IEEE
RMID: 0020136429
DOI: 10.1109/JSEN.2013.2295312
Appears in Collections:Electrical and Electronic Engineering publications

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