Preprint Article Version 1 This version is not peer-reviewed

Highly Sensitive Detection of 4-Methylimidazole Using a Terahertz Metamaterial

Version 1 : Received: 17 October 2018 / Approved: 18 October 2018 / Online: 18 October 2018 (11:58:31 CEST)

A peer-reviewed article of this Preprint also exists.

Shin, H.J.; Jang, H.W.; Ok, G. Highly Sensitive Detection of 4-Methylimidazole Using a Terahertz Metamaterial. Sensors 2018, 18, 4304. Shin, H.J.; Jang, H.W.; Ok, G. Highly Sensitive Detection of 4-Methylimidazole Using a Terahertz Metamaterial. Sensors 2018, 18, 4304.

Journal reference: Sensors 2018, 18, 4304
DOI: 10.3390/s18124304

Abstract

We demonstrate, for the first time, a highly sensitive detection of 4-methylimidazole (4-MeI), a carcinogenic material, by applying an electric field enhancement technique using a terahertz (THz) metamaterial at the THz region. The THz metamaterials were fabricated with a metal array using an electric-field-coupled inductor-capacitor (ELC) resonator structure, and FDTD simulation showed good agreement with experimental results. We measured the THz spectra of the metamaterials to detect 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 x 10-3 as the concentration was increased, up to 20 mg/L. Our study provides new insight into application of metamaterials to detect carcinogen using a THz technique.

Subject Areas

THz spectroscopy; 4-methylimidazole; metamaterial; carcinogen detection

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