Highly sensitive detection of daminozide using terahertz metamaterial sensors  

作　　者：Hanping Mao Xiaoxue Du Yuting Yan Xiaodong Zhang Guoxin Ma Yafei Wang Yong Liu Bin Wang Xiaoyue Yang Qiang Shi 

机构地区：[1]Key Laboratory of Modern Agricultural Equipment and Technology,Ministry of Education,Jiangsu University,Zhenjiang 212013,Jiangsu,China [2]School of Agricultural Engineering,Zhenjiang 212013,Jiangsu,China [3]Department of Obstetrics and Gynecology,Affiliated Hospital of Jiangsu University,Zhenjiang 212013,Jiangsu,China

出　　处：《International Journal of Agricultural and Biological Engineering》2022年第6期180-188,共9页国际农业与生物工程学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.32071905,No.62101217,No.61771224);the Natural Science Foundation of Jiangsu Province(Grant No.BK20190858);the Project of Agricultural Equipment Department of Jiangsu University(Grant No.NZXB20210106);China Postdoctoral Science Foundation(Grant No.2019M661754);China Scholarship Council(Grant No.201908320223);Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX19_1619);Zhenjiang Science and Technology Innovation Fund(Grant No.SH2020051).

摘　　要：In order to solve the problems of low sensitivity and complex sample pretreatment in traditional detection,a method was proposed in this study to detect daminozide using terahertz combined with a metamaterial sensor,which enables real-time and label-free molecular detection with high sensitivity.The correlation between the transmission frequency shift and absorbance of daminozide solution at different concentrations was analyzed.The simulation and experimental results showed that this metamaterial sensor could achieve highly sensitive sensing of daminozide solutions at 0.05 mg/L.The maximum quality factor(Q_(max))of the two peaks could reach 5.78 and 13.05,and the maximum figure of merit(FOM)of the two peaks can reach 0.82 and 1.72.The maximum sensitivity of two resonance peaks reached 38.148 GHz/(mg·L)and 133.516 GHz/(mg·L)when the concentration of daminozide in the solution was 2000 mg/L.There was an obvious positive correlation between the transmission and transmission,frequency shift and frequency shift,and absorbance and absorbance of the resonance peak of daminozide solutions.Therefore,this platform not only opens up new possibilities for the microanalysis of the chemical composition of substances in solutions but also provides a valuable reference for the design of other metamaterial-based sensors in the field of food safety.

关 键 词：Terahertz time-domain spectroscopy plant growth regulator DETECTION METAMATERIAL 

分 类 号：Q55[生物学—生物化学]