Highly Sensitive Detection of 4-Methylimidazole Using a Terahertz Metamaterial

In this study, we demonstrated a highly sensitive detection method of 4-methylimidazole (4-MeI), a carcinogenic material, by using a terahertz (THz) metamaterial at a THz region. The THz metamaterials were fabricated with a metal array, using an electric-field-coupled inductor-capacitor (ELC) resona...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2018-12, Vol.18 (12), p.4304
Main Authors: Shin, Hee Jun, Jang, Hae Won, Ok, Gyeongsik
Format: Article
Language:English
Subjects:
4-methylimidazole
carcinogen detection
metamaterial
THz spectroscopy
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Summary:In this study, we demonstrated a highly sensitive detection method of 4-methylimidazole (4-MeI), a carcinogenic material, by using a terahertz (THz) metamaterial at a THz region. The THz metamaterials were fabricated with a metal array, using an electric-field-coupled inductor-capacitor (ELC) resonator structure, and a finite-difference time-domain (FDTD) simulation showed good agreement with the experimental results. We measured the THz spectra of the metamaterials to detect the 4-MeI concentrations of 0, 1, 2, 5, 10, 15, and 20 mg/L. The resonance frequency of the metamaterial was shifted by, approximately, 8 GHz and transmittance at the resonance frequency increased to 2 × 10 , as the concentration was increased, up to 20 mg/L. Our study provides new insight into the application of metamaterials in detecting carcinogens, using a THz technique.
ISSN:1424-8220
1424-8220
DOI:10.3390/s18124304