期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 222, 期 -, 页码 173-180出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.08.074
关键词
Chemical sensor; Ethanol sensor; Electromagnetic-based sensor; Metamaterial absorber; Frequency-tunable absorber; Microfluidics
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2014R1A2A1A11050010]
- National Research Foundation of Korea [2014R1A2A1A11050010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We proposed a novel electromagnetic-based chemical sensor that is realized by using a metamaterial absorber. The metamaterial absorber comprises a split-ring-cross resonator (SRCR) and a microfluidic channel. The SRCR can generate LC resonance that is very sensitive to changes in the effective dielectric constant around the capacitive gap. In addition, microfluidic channels can change the effective dielectric constant of the dielectric substrate by using an infinitesimal quantity of a liquid on the order of microliters. The proposed chemical sensor can detect the electrical properties of any unidentified liquids injected into the channels, as well as concentration changes in the liquids. The performance of the proposed sensor is demonstrated using the absorption measurements of a fabricated prototype sample with waveguides. In addition, the relationship between the absorption frequency and chemical concentration is demonstrated. (C) 2015 Elsevier B.V. All rights reserved.
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