A Wireless Passive Conductivity Detector for Fluidic Conductivity Analyzation in Microchannel
Main Article Content
Abstract
Electrical conductivity is one of the main parameters of an electrolyte solution. Fluidic conductivity detection and analyzation is very important in many academic research and industrial applications. In order to avoid the issues of the conventional sensing technique, this study utilizes the wireless passive conductivity detector for fluidic conductivity analyzation in the microchannel. The operation of the proposed structure is designed, simulated and then validated by experiments. The experimental results show that the resonance frequency of the sensor decreases from 64.7 MHz to 58.6 MHz according to the rise of KCl concentration in the fluidic channel from 10 mM to 1 M. The dependence of resonance frequency on the distance between inductors was also implemented and analyzed in this work. The integration of the LC passive sensing technique in microfluidic conductivity detector can be utilized in various academic research, industrial application, especially in biosensor applications.
Keywords
conductivity detector, LC passive sensing technique, microfluidic
Article Details
References
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50
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https://doi.org/10.1109/ICSENS.2015.7370574
Design of capacitively coupled contactless
conductivity detection sensor, Flow Meas. Instrum. 27
(2012) 67–70.
[2] D. Strazza, M. Demori, V. Ferrari, and P. Poesio,
Capacitance sensor for hold-up measurement in highviscous-oil/conductive-water core-annular flows, Flow
Meas. Instrum. 22 (2011) 360–369.
[3] N. Dac, H. Vu, Q. Tuan, D. Quang, L. Nguyen, and H.
Hai, Differential C 4 D sensor for conductive and non
- conductive fluidic channel, Microsyst. Technol.
(2015).
[4] D. Fracassi Silva J.A. and L. Do C.L., An
Oscillometric Detector for Capillary Electrophoresis,
Anal.Chem. 70 (1998) 4339–4343.
[5] A. J. Zemann, E. Schnell, D. Volgger, and G. K. Bonn,
Contactless Conductivity Detection for Capillary
Electrophoresis, Anal. Chem. 70 (1998) 563–567.
[6] M. Demori, V. Ferrari, D. Strazza, and P. Poesio, A
capacitive sensor system for the analysis of two-phase
flows of oil and conductive water, Sensors Actuators,
A Phys. 163 (2010) 172–179.
[7] E. M. Abad-Villar, J. Tanyanyiwa, M. T. FernándezAbedul, A. Costa-García, and P. C. Hauser, Detection
of Human Immunoglobulin in Microchip and
Conventional Capillary Electrophoresis with
Contactless Conductivity Measurements, Anal. Chem.
76 (2004) 1282–1288.
[8] J. Tanyanyiwa, E. M. Abad-Villar, and P. C. Hauser,
Contactless conductivity detection of selected organic
ions in on-chip electrophoresis, Electrophoresis 25
(2004) 903–908.
[9] D. A. Links, Analytical Methods Capacitively coupled
contactless conductivity detection on microfluidic
systems - ten years of development †, (2012) 25–33.
[10] P. Kubáň and P. C. Hauser, Application of an external
contactless conductivity detector for the analysis of
beverages by microchip capillary electrophoresis,
Electrophoresis 26 (2005) 3169–3178.
[11] Chi-Yuan Shih, Wei Li, Siyang Zheng, and Yu-Chong
Tai, A Resonance-Induced Sensitivity Enhancement
Method for Conductivity Sensors, in 2006 5th IEEE
Conference on Sensors, Oct. 2006, 271–274,
[12] C. C. Collins, Miniature Passive Pressure Transensor
for Implanting in the Eye, IEEE Trans. Biomed. Eng.
BME-14 (1967) 74–83.
[13] G. Chitnis and B. Ziaie, A ferrofluid-based wireless
pressure sensor, J. Micromechanics Microengineering
23 (2013).
[14] B. Andò, S. Baglio, N. Savalli, and C. Trigona,
Cascaded “triple-bent-beam” MEMS sensor for
contactless temperature measurements in
nonaccessible environments, IEEE Trans. Instrum.
Meas. 60 (2011) 1348–1357.
[15] C. Zhang, L. F. Wang, and Q. A. Huang, Extending
the remote distance of LC passive wireless sensors via
strongly coupled magnetic resonances, J.
Micromechanics Microengineering 24 (2014).
[16] Q.-A. Huang, L. Dong, and L.-F. Wang, LC Passive
Wireless Sensors Toward a Wireless Sensing Platform:
Status, Prospects, and Challenges, J.
Microelectromechanical Syst. 25 (2016) 822–841.
[17] L. Do Quang, T. T. Bui, A. B. Hoang, P. Van Thanh,
C. P. Jen, and T. Chu Duc, Development of a Passive
Capacitively Coupled Contactless Conductivity
Detection (PC4D) Sensor System for Fluidic Channel
Analysis Toward Point-of-Care Applications, IEEE
Sens. J. 19 (2019) 6371–6380.
[18] L. Q. Do, T. T. Bui, H. T. T. Tran, K. Kikuchi, M.
Aoyagi, and T. C. Duc, Fluidic platform with
embedded differential capacitively coupled contactless
conductivity detector for micro-object sensing, Int. J.
Nanotechnol. 15 (2018) 24.
[19] H. T. T. Thuy et al., Coplanar differential capacitively
coupled contactless conductivity detection (CD-C4D)
sensor for micro object inside fluidic flow
recognization, TRANSDUCERS 2017 - 19th Int.
Conf. Solid-State Sensors, Actuators Microsystems
(2017) 1124–1127.
https://doi.org/10.1109/TRANSDUCERS.2017.79942
50
[20] Q. L. Do, T. T. Bui, T. T. H. Tran, K. Kikuchi, M.
Aoyagi, and T. C. Duc, Differential capacitively
coupled contactless conductivity detection (DC4D)
sensor for detection of object in microfluidic channel,
2015 IEEE SENSORS - Proc. (2015) 1–4.
https://doi.org/10.1109/ICSENS.2015.7370574