High-Sensitivity Metamaterial-Inspired Sensor for Microfluidic Dielectric Characterization

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.

[1]  D. Kwong,et al.  An absorptive filter using microfluidic switchable metamaterials , 2011, 2011 16th International Solid-State Sensors, Actuators and Microsystems Conference.

[2]  D. Abbott,et al.  Displacement Sensor Based on Diamond-Shaped Tapered Split Ring Resonator , 2013, IEEE Sensors Journal.

[3]  J. Bonache,et al.  Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines , 2005, IEEE Transactions on Microwave Theory and Techniques.

[4]  Ferran Martín,et al.  Alignment and Position Sensors Based on Split Ring Resonators , 2012, Sensors.

[5]  Christopher C. Davis,et al.  Microwave dielectric characterization of binary mixtures of water, methanol, and ethanol , 1996 .

[6]  C. Puttlitz,et al.  Metamaterial-based wireless strain sensors , 2009 .

[7]  Y. Kobayashi,et al.  Accurate measurements of complex permittivity of liquid based on a TM/sub 010/ mode cylindrical cavity method , 2005, 2005 European Microwave Conference.

[8]  Derek Abbott,et al.  Sub-diffraction thin-film sensing with planar terahertz metamaterials. , 2011, Optics express.

[9]  Derek Abbott,et al.  Rotation Sensor Based on Horn-Shaped Split Ring Resonator , 2013, IEEE Sensors Journal.

[10]  T. Fujii,et al.  Integrated Broadband Microwave and Microfluidic Sensor Dedicated to Bioengineering , 2009, IEEE Transactions on Microwave Theory and Techniques.

[11]  Rolf Jakoby,et al.  Passive chipless wireless sensor for two-dimensional displacement measurement , 2011, 2011 41st European Microwave Conference.

[12]  F. Soldovieri,et al.  A Microwave Resonant Sensor for Concentration Measurements of Liquid Solutions , 2013, IEEE Sensors Journal.

[13]  Ming Huang,et al.  Microwave Sensor Using Metamaterials , 2011 .

[14]  I. Gil,et al.  On the electrical characteristics of complementary metamaterial resonators , 2006, IEEE Microwave and Wireless Components Letters.

[15]  Tao Chen,et al.  Metamaterials Application in Sensing , 2012, Sensors.

[16]  Nikolay I Zheludev,et al.  The Road Ahead for Metamaterials , 2010, Science.

[17]  Jong-Gwan Yook,et al.  A planar split-ring resonator-based microwave biosensor for label-free detection of biomolecules , 2012 .

[18]  Kiejin Lee,et al.  Microwave dielectric resonator biosensor for aqueous glucose solution. , 2008, The Review of scientific instruments.

[19]  Martin Koch,et al.  Thin-film sensing with planar asymmetric metamaterial resonators , 2008 .

[20]  R. Jakoby,et al.  Metamaterial Inspired Microwave Sensors , 2012, IEEE Microwave Magazine.

[21]  D. Abbott,et al.  Metamaterial-Inspired Multichannel Thin-Film Sensor , 2011, IEEE Sensors Journal.

[22]  B. Kapilevich,et al.  Optimized Microwave Sensor for Online Concentration Measurements of Binary Liquid Mixtures , 2011, IEEE Sensors Journal.

[23]  R. Clarke,et al.  A review of RF and microwave techniques for dielectric measurements on polar liquids , 2006, IEEE Transactions on Dielectrics and Electrical Insulation.

[24]  Christopher L. Holloway,et al.  Fluid interactions with metafilms/metasurfaces for tuning, sensing, and microwave-assisted chemical processes , 2011 .

[25]  Ferran Martín,et al.  Novel Sensors Based on the Symmetry Properties of Split Ring Resonators (SRRs) , 2011, Sensors.

[26]  Derek Abbott,et al.  Metamaterial-based microfluidic sensor for dielectric characterization , 2013 .

[27]  D. Abbott,et al.  Compact Dual-Mode Wideband Filter Based on Complementary Split-Ring Resonator , 2014, IEEE Microwave and Wireless Components Letters.

[28]  Jose A. Hejase,et al.  Microwave artificially structured periodic media microfluidic sensor , 2011, 2011 IEEE 61st Electronic Components and Technology Conference (ECTC).

[29]  Abbas Omar,et al.  Accurate Microwave Resonant Method for Complex Permittivity Measurements of Liquids , 2000 .

[30]  D. Dubuc,et al.  A Microwave and Microfluidic Planar Resonator for Efficient and Accurate Complex Permittivity Characterization of Aqueous Solutions , 2013, IEEE Transactions on Microwave Theory and Techniques.

[31]  Derek Abbott,et al.  Flexible terahertz metamaterials for dual-axis strain sensing. , 2013, Optics letters.