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A Fully Electronically Tunable Millimeter Wave lab-in-waveguide Nano-Fluidic Sensor. / He, Guoqiang; Zhang, Yuchen; De Tandt, Cathleen; Stiens, Johan.

In: Journal of Physics D: Applied Physics, Vol. 53, No. 9, 20.12.2019.

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@article{9714eb1591c54c65b8fd86268dfa826d,
title = "A Fully Electronically Tunable Millimeter Wave lab-in-waveguide Nano-Fluidic Sensor",
abstract = "In this paper, we reported an ultra-sensitive millimeter wave reflection liquid sensor, which is electrically tunable, non-invasive and label-free. The reflection liquid sensor is based on the impedance match technique and implemented in a rectangular waveguide structure, which makes the interaction between millimeter wave and liquid under test (LUT) in a closed environment, forms a nano-fluidic lab-in-waveguide liquid sensor, and isolates the interference of surroundings. The reflection liquid sensor shows high sensitivity to the small complex-valued permittivity difference of the LUTs. Taking the ethanol-distilled water as the benchmark, a 64-dB ethanol-distilled water contrast is experimentally achieved. The detection limit is 0.05{\%} ethanol in volumetric concentration with a 4-dB signal difference, which is the best performance of the microwave and millimeter wave liquid sensors publicly reported until now. The ultra-sensitive reflection sensor can be used for bio-chemical sensing. The lab-in-waveguide biosensor is also compatible with microfluidics.",
keywords = "THz, Microfluidics, Impedance matching, Liquid sensing, label-free sensing, non-invasive, electronically tunable",
author = "Guoqiang He and Yuchen Zhang and {De Tandt}, Cathleen and Johan Stiens",
year = "2019",
month = "12",
day = "20",
doi = "https://iopscience.iop.org/article/10.1088/1361-6463/ab5ba6/meta",
language = "English",
volume = "53",
journal = "Journal of Physics D: Applied Physics",
issn = "0022-3727",
publisher = "IOP Publishing Ltd.",
number = "9",

}

RIS

TY - JOUR

T1 - A Fully Electronically Tunable Millimeter Wave lab-in-waveguide Nano-Fluidic Sensor

AU - He, Guoqiang

AU - Zhang, Yuchen

AU - De Tandt, Cathleen

AU - Stiens, Johan

PY - 2019/12/20

Y1 - 2019/12/20

N2 - In this paper, we reported an ultra-sensitive millimeter wave reflection liquid sensor, which is electrically tunable, non-invasive and label-free. The reflection liquid sensor is based on the impedance match technique and implemented in a rectangular waveguide structure, which makes the interaction between millimeter wave and liquid under test (LUT) in a closed environment, forms a nano-fluidic lab-in-waveguide liquid sensor, and isolates the interference of surroundings. The reflection liquid sensor shows high sensitivity to the small complex-valued permittivity difference of the LUTs. Taking the ethanol-distilled water as the benchmark, a 64-dB ethanol-distilled water contrast is experimentally achieved. The detection limit is 0.05% ethanol in volumetric concentration with a 4-dB signal difference, which is the best performance of the microwave and millimeter wave liquid sensors publicly reported until now. The ultra-sensitive reflection sensor can be used for bio-chemical sensing. The lab-in-waveguide biosensor is also compatible with microfluidics.

AB - In this paper, we reported an ultra-sensitive millimeter wave reflection liquid sensor, which is electrically tunable, non-invasive and label-free. The reflection liquid sensor is based on the impedance match technique and implemented in a rectangular waveguide structure, which makes the interaction between millimeter wave and liquid under test (LUT) in a closed environment, forms a nano-fluidic lab-in-waveguide liquid sensor, and isolates the interference of surroundings. The reflection liquid sensor shows high sensitivity to the small complex-valued permittivity difference of the LUTs. Taking the ethanol-distilled water as the benchmark, a 64-dB ethanol-distilled water contrast is experimentally achieved. The detection limit is 0.05% ethanol in volumetric concentration with a 4-dB signal difference, which is the best performance of the microwave and millimeter wave liquid sensors publicly reported until now. The ultra-sensitive reflection sensor can be used for bio-chemical sensing. The lab-in-waveguide biosensor is also compatible with microfluidics.

KW - THz

KW - Microfluidics

KW - Impedance matching

KW - Liquid sensing

KW - label-free sensing

KW - non-invasive

KW - electronically tunable

U2 - https://iopscience.iop.org/article/10.1088/1361-6463/ab5ba6/meta

DO - https://iopscience.iop.org/article/10.1088/1361-6463/ab5ba6/meta

M3 - Article

VL - 53

JO - Journal of Physics D: Applied Physics

JF - Journal of Physics D: Applied Physics

SN - 0022-3727

IS - 9

ER -

ID: 49074866