Detection of aflatoxin B1 and B2 using terahertz meta-biosensor

Aflatoxin B1 and B2 are toxic to humans and widespread in agricultural and food products. Thus, rapid and accurate determination of these substances is essential for the safe consumption of agricultural products and prevention of further detriment to human health. Detection via conventional methods has proven to be time-consuming and complex. Here, we present that a terahertz (THz) metamaterial (MM)-based biosensor shows promising potential for high-sensitivity, quantitative identification of aflatoxin B1 and B2 with extremely small amounts. In addition, the sensing of analyte was demonstrated as a function of content, thickness, and dielectric constant by detailed measurement and simulation.