High-sensitivity detection of trace imidacloprid and tetracycline hydrochloride by multi-frequency resonance metamaterials
High-sensitivity detection of trace imidacloprid and tetracycline hydrochloride by multi-frequency resonance metamaterials
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DOI：
10.1007/s11694-022-01314-4
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发表时间：
2022-02
影响因子：
3.4
通讯作者：
Qi Wang;Shan Yin;Xintong Shi;Jichao Fan;Kang Huang;Weilu Gao;Lijuan Xie;Y. Ying
中科院分区：
文献类型：
--
作者：
Qi Wang;Shan Yin;Xintong Shi;Jichao Fan;Kang Huang;Weilu Gao;Lijuan Xie;Y. Ying
食品中痕量农药残留的高灵敏度检测是必需的。太赫兹超材料（THz MM）通过增强光与物质之间的相互作用，是一种重要的高灵敏度探测技术。本文利用开口环谐振器实现了单、双U型谐振器的多频谐振，并对两种谐振器进行了实验研究。太赫兹毫米波中低频和高频谐振模（LFRM和HFRM）共存，并且只有在HFRM下才能检测到高达0.1 ng的吡虫啉的实验灵敏度。然后用盐酸四环素对上述结论进行验证。多频共振太赫兹波有助于农产品中痕量农药残留的高灵敏度检测。这项研究真正证明了提高分析性能和实现精细生物检测的重要应用。
Highly sensitive detection of trace pesticide residues in food products is needed. The terahertz metamaterial (THz MM) is one of the most important detection approaches with high sensitivity by enhancing the interaction between light and matter. In this work, single and double U-shape resonator THz MMs were fabricated based on split-ring resonators with multi-frequency resonance achieved. The low and high-frequency resonant modes (LFRM & HFRM) coexisted in THz MMs and the experimental sensitivity of imidacloprid up to 0.1 ng could only be detected under HFRM. Then tetracycline hydrochloride was used to verify the above conclusions. Multi-frequency resonator THz MMs may be helpful for the high-sensitivity detection of trace pesticide residues in agricultural products. This study truly demonstrates important applications to improve analytical performance and achieve delicate biological detection.