High-sensitivity metamaterial-inspired sensor for microfluidic dielectric characterization

Ebrahimi, A, Withayachumnankul, W, Al-Sarawi, S and Abbott, D 2014, 'High-sensitivity metamaterial-inspired sensor for microfluidic dielectric characterization', IEEE Sensors Journal, vol. 14, no. 5, pp. 1345-1351.

Document type: Journal Article
Collection: Journal Articles

Title High-sensitivity metamaterial-inspired sensor for microfluidic dielectric characterization
Author(s) Ebrahimi, A
Withayachumnankul, W
Al-Sarawi, S
Abbott, D
Year 2014
Journal name IEEE Sensors Journal
Volume number 14
Issue number 5
Start page 1345
End page 1351
Total pages 7
Publisher IEEE
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.
Subject Sensor Technology (Chemical aspects)
Circuits and Systems
Keyword(s) Complementary split-ring resonator (CSRR)
dielectric characterization
microfluidic sensor
DOI - identifier 10.1109/JSEN.2013.2295312
Copyright notice © 2013 IEEE
ISSN 1530-437X
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