Capacitive Solvent Sensing with Microfluidics Chip

Year 2018, Volume: 22 Issue: 2, 375 - 379, 15.08.2018

İsmail Bilican Mustafa Tahsin Güler

Abstract

Solvents are widely used in daily life as well as in almost all laboratories. Identification and detection of these solvents used in many areas have great importance in terms of health, toxicology and environment. For this reason, the main purpose of our study is to be able to identify the solvents in practical ways. In this study, gold microelectrodes were used to define the capacitance detection of various solvents in the frequency range of 20 kHz - 2 MHz. Moreover, the electrical noise and signal output of the solvents at different frequencies were investigated. Measurements were made by micro-channels integrated on microelectrodes for reducing noises and detection with high sensibility.

Keywords

Capacitive sensor, Micro channel; Coplanar electrode

References

• [1] Kao, K. C. 2004. Dielectric phenomena in solids. Academic press.
• [2] Kim, M., Moon, W. 2006. A new capacitive displacement sensor with high accuracy and long-range. Sensor and Actuators A, 130(2006), 135-141.
• [3] Dai, C.L. 2007. A capacitive humidity sensor integrated with micro heater and ring oscillator circuit fabricated by CMOS–MEMS technique. Sensor and Actuators B, 122(2007), 375-380.
• [4] Woodard, S.E., Taylor, B.D. 2007. A wireless fluid-level measurement technique. Sensor and Actuator A, 137(2007), 268-278.
• [5] Asghari, M., Serhatlioglu, M., Ortaç, B., Solmaz, M.E., Elbuken, C. 2017. Sheathless Microflow Cytometry Using Viscoelastic Fluids. Scientific Reports, 7.
• [6] Guler, M.T., Beyazkilic, P., Elbuken, C. 2017. A versatile plug microvalve for microfluidic applications. Sensors and Actuators A: Physical, 265(2017), 224-230.
• [7] Shafiee, H., Kanakasabapathy, M.K., Juillard, F., Keser, M., Sadasivam, M., Yuksekkaya, M., Hanhauser, E., Henrich, T.J., Kuritzkes, D.R., Kaye, K.M. 2015. Printed flexible plastic microchip for viral load measurement through quantitative detection of viruses in plasma and saliva. Scientific reports, 5.
• [8] Bard, A.J., Faulkner L.R. 2001. Electrochemical Methods Fundamentals and Applications. John Wiley & Sons, New York.
• [9] Bilican, I., Guler, M.T., Gulener, N., Yuksel, M., Agan, S. 2016. Capacitive solvent sensing with interdigitated microelectrodes. Microsystem Technologies, 22,3(2016), 659-668.
• [10] Tang, X., Flandre, D., et al. 2011. A new interdigitated array microelectrode-oxide-silicon sensor with label-free, high sensitivity and specificity for fast bacteria detection. Sensors and Actuators B, 156(2011), 578-587.
• [11] Isiksacan, Z., Guler, M.T., Aydogdu, B., Bilican, I., Elbuken, C. 2016. Rapid fabrication of microfluidic PDMS devices from reusable PDMS molds using laser ablation. Journal of Micromechanics and Microengineering, 26,3(2016), 035008.
• [12] Guler, M.T., Bilican, I., Agan, S., Elbuken, C. 2015. Simple approach for the fabrication of 3D microelectrodes for impedimetric sensing. Journal of Micromechanics and Microengineering 25,9(2015), 095019.
• [13] Morgan, H.N.G. Green, AC. 2003. Electrokinetics. Research Studies Press.
• [14] Lide, D. C. 2004. CRC handbook of chemistry and physics. CRC press.