Sensors | |
Highly Sensitive Multi-Channel IDC Sensor Array for Low Concentration Taste Detection | |
Md. Rajibur Rahaman Khan2  Shin-Won Kang1  | |
[1] School of Electronics Engineering, Kyungpook National University, 1370 Sankyuk-Dong, Bukgu, Daegu 702-701, Korea; E-Mail | |
关键词: interdigitated capacitor; dielectric constant; taste sensor array; principal component analysis; | |
DOI : 10.3390/s150613201 | |
来源: mdpi | |
【 摘 要 】
In this study, we designed and developed an interdigitated capacitor (IDC)-based taste sensor array to detect different taste substances. The designed taste sensing array has four IDC sensing elements. The four IDC taste sensing elements of the array are fabricated by incorporating four different types of lipids into the polymer, dioctyl phenylphosphonate (DOPP) and tetrahydrofuran (THF) to make the respective dielectric materials that are individually placed onto an interdigitated electrode (IDE) via spin coating. When the dielectric material of an IDC sensing element comes into contact with a taste substance, its dielectric properties change with the capacitance of the IDC sensing element; this, in turn, changes the voltage across the IDC, as well as the output voltage of each channel of the system. In order to assess the effectiveness of the sensing system, four taste substances, namely sourness (HCl), saltiness (NaCl), sweetness (glucose) and bitterness (quinine-HCl), were tested. The IDC taste sensor array had rapid response and recovery times of about 12.9 s and 13.39 s, respectively, with highly stable response properties. The response property of the proposed IDC taste sensor array was linear, and its correlation coefficient
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
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