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Differential C4D sensor for conductive and non-conductive fluidic channel

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Abstract

This paper presents a novel design of a differential C4D (DC4D) sensor based on three electrodes for both conductive and non-conductive fluidic channel. This structure consists of two single C4D with an applied carrier sinusoidal signal to the center electrode as the excitation electrode. The electrodes are directly bonded on the PCB with built-in differential amplifier and signal processing circuit in order to reduce the parasitic component and common noise. In the non-conductive fluidic channel, the output voltage and capacitance changes 214.39 mV and 14 fF, respectively when a 3.83 μl tin particle crosses an oil channel. In conductive fluidic channel, the output voltage and admittance change up to 300 mV and 0.07 μS for the movement of a 4.88 μl plastic particle through channel. Moreover, the voltage change of this sensor is linear relation with the volume of investigated particle. This sensor also allows measuring velocity of particle inside fluidic channel and resistivity of the conductive fluidic.

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Acknowledgments

This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.01-2011.59.

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Authors and Affiliations

  1. Posts and Telecommunications Institute of Technology, Hanoi, Vietnam

    Nguyen Dac Hai

  2. Institute of Applied Physics and Scientific Instrument, Vietnam Academy of Science and Technology, Hanoi, Vietnam

    Vu Quoc Tuan

  3. University of Science, Vietnam National University, Hanoi, Vietnam

    Do Quang Loc

  4. Nano and Energy Center, Vietnam National University, Hanoi, Vietnam

    Nguyen Hoang Hai

  5. University of Engineering and Technology, Vietnam National University, Hanoi, Vietnam

    Chu Duc Trinh

Authors
  1. Nguyen Dac Hai
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  2. Vu Quoc Tuan
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  3. Do Quang Loc
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  4. Nguyen Hoang Hai
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  5. Chu Duc Trinh
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Correspondence to Chu Duc Trinh.

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Hai, N.D., Tuan, V.Q., Loc, D.Q. et al. Differential C4D sensor for conductive and non-conductive fluidic channel. Microsyst Technol 22, 2511–2520 (2016). https://doi.org/10.1007/s00542-015-2586-4

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  • DOI: https://doi.org/10.1007/s00542-015-2586-4

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