Whispering-Gallery-Mode Resonator Technique With Microfluidic Channel for Permittivity Measurement of Liquids

Gubin, A. I.; Barannik, A. A.; Cherpak, N. T.; Protsenko, I. A.; Pud, Sergii; Offenhäusser, Andreas; Vitusevich, S. А.

doi:10.1109/tmtt.2015.2423289

Cited by 33 publications

(15 citation statements)

References 13 publications

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“…(7) where Gr is the resonant conductance of the entire equivalent model. The slot resonant admittance, Gs, has already been defined in (3) and (4).…”

Section: Model Analysismentioning

confidence: 99%

A Microfluidic-Integrated SIW Lab-on-Substrate Sensor for Microliter Liquid Characterization

2016

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Abstract-A novel microfluidic-integrated microwave sensor with potential application in microliter-volume biological/biomedical liquid sample characterization and quantification is presented in this paper. The sensor is designed based on the resonance method, providing the best sensing accuracy, and implemented by using a substrate-integratedwaveguide (SIW) structure combining with a rectangular slot antenna operating at 10 GHz. The device can perform accurate characterization of various liquid materials from very low to high loss, demonstrated by measurement of deionized (DI) water and methanol liquid mixtures. The measured relative permittivity, which is the real part of complex permittivity, ranges from 8.58 to 66.12, which is simply limited by the choice of test materials available in our laboratory, not any other technical considerations of the sensor. The fabricated sensor prototype requires a very small liquid volume of less than 7 µl, while still offering an overall accuracy of better than 3 %, as compared to the commercial and other published works. Key advantages of the proposed sensor are that it combines 1.) a very low-profile planar and miniaturized structure sensing microliter liquid volume; 2.) ease of design and fabrication, which makes it cost-effective to manufacture and 3.) noninvasive and contactless measurements. Moreover, since the microfluidic subsystem can potentially be detached from the SIW microwave sensor and, afterward, replaced by a new microfluidic component, the sensor can be reused with no life-cycle limitation and without degrading any figure of merit.

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“…(7) where Gr is the resonant conductance of the entire equivalent model. The slot resonant admittance, Gs, has already been defined in (3) and (4).…”

Section: Model Analysismentioning

confidence: 99%

A Microfluidic-Integrated SIW Lab-on-Substrate Sensor for Microliter Liquid Characterization

2016

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“…MEASUREMENT CELL Successful using of the sapphire as a resonator material for the measurement cell for the liquids electromagnetic properties determination in Ka-band [1] leads us to use it in the sub-THz frequency band as well.…”

Section: Choice Of the Resonator As A Base Of Thementioning

confidence: 99%

“…The microfluidic channel is placed in the plastic layer and its distance from the resonator center is 3 mm. The diameter of the microfluidic channel and its position in the plastic layer are difficult for precise measuring and will be corrected [1]. The air-filled microfluidic channel does not disturb the resonator field significantly and does not change the resonator spectral and energy characteristics.…”

Section: Abstract-wementioning

confidence: 99%

“…Whispering-gallery mode (WGM) dielectric resonators are widely used for determination of the condensed matter properties in the Ka-band [1,2]. In [1] the measurement technique based on the cylindrical sapphire resonator covered with the plastic layer containing the microfluidic channel is proposed to be used for the determination of liquids complex permittivity.…”

Section: Introductionmentioning

confidence: 99%

“…In [1] the measurement technique based on the cylindrical sapphire resonator covered with the plastic layer containing the microfluidic channel is proposed to be used for the determination of liquids complex permittivity. The measurement technique with the microfluidic channel filled with the liquid under test allows studying small volume materials.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

WGM resonators with microfluidic channel for sub-mm wave characterization of biological liquids

Barannik¹,

Cherpak²,

Gubin³

et al. 2016

2016 German Microwave Conference (GeMiC)

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Microfluidic Whispering Gallery Mode Optical Sensors for Biological Applications

Wang

Zeng

Humbert

et al. 2020

Laser & Photonics Reviews

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Whispering gallery mode (WGM) resonators have been exploited as a highly sensitive and efficient sensing technique in the past few years. They offer the advantages of ultrahigh sensitivity, compact size, and label-free sensing capability. More recently, with the rapid development of microfluidic technologies, many integrated WGM sensors, by combining the portability of lab-on-chip devices and the high sensitivity of WGM resonators, have emerged. The capabilities of efficient sample handling and multiplexed analyte detection offered by these systems have led to many biological and chemical sensing applications, especially for the detection of single particle or biomolecule. In this review, different sensing mechanisms based on integrated whispering gallery mode resonators are introduced. Various geometries of WGM cavities including solid, liquid, and hollow resonators and a detailed discussion on their integration with microfluidic devices are also covered. Different types of packaging schemes and integration methods are compared in terms of ease of fabrication and device performance. Finally, recent applications of microfluidic-based WGM sensors for detecting biological and chemical target molecules are discussed, with a prospect on future challenges and trends of development in microfluidics for multiplexed detection.

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Whispering-Gallery-Mode Resonator Technique With Microfluidic Channel for Permittivity Measurement of Liquids

Cited by 33 publications

References 13 publications

A Microfluidic-Integrated SIW Lab-on-Substrate Sensor for Microliter Liquid Characterization

A Microfluidic-Integrated SIW Lab-on-Substrate Sensor for Microliter Liquid Characterization

WGM resonators with microfluidic channel for sub-mm wave characterization of biological liquids

Microfluidic Whispering Gallery Mode Optical Sensors for Biological Applications

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