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Rapid Analysis of Fruit Acids by Laser-Engraved Free-Standing Terahertz Metamaterials

文献类型： 外文期刊

作者： Zhou, Ruiyun 1 ; Wang, Chen 2 ; Wang, Qi 1 ; Xie, Lijuan 1 ; Ying, Yibin 1 ;

作者机构： 1.Zhejiang Univ, Coll Biosyst Engn & Food Sci, 866 Yuhangtang Rd, Hangzhou 310058, Zhejiang, Peoples R China

2.Guangdong Acad Agr Sci, Inst Qual Stand & Monitoring Technol Agroprod, 20 Jinying Rd, Guangzhou 510640, Guangdong, Peoples R China

关键词： Terahertz spectroscopy; Flavor; Fruit acids; Laser-engraved metamaterial; Free-standing

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN： 1936-9751

年卷期：

页码：

收录情况： SCI

摘要： Organic acids are important components in determining fruit taste, and it is necessary to develop rapid analysis methods for them. A simple and effective method based on laser-engraved free-standing terahertz (THz) metamaterials has been developed for rapid analysis of fruit acids. Compared with traditional fabrication methods for THz metamaterials, laser direct writing technology was employed for fabricating the Cu-foil-based THz devices in this research, which is time-saving, cost-effective, and high-throughput. To realize effective fabrication of metamaterials, proper fabrication parameters were selected according to morphology and spectral characterization. Numerical analysis was performed to reveal the fundamental mechanism of THz sensing based on metamaterials. Furthermore, experimental results indicate that fruit acid with a concentration of 0.1 mg L-1 can be successfully distinguished, which is quick and simple compared with traditional acid-base titration. The proposed strategy demonstrates great potential for rapid in situ analysis of flavor components in food products.

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