Porous silicon Fabry-Pérot interferometer designed for sensitive detection of aflatoxin B in field crops.

Herein, a label-free sensing platform was designed for accurate, rapid and selective detection of aflatoxin B1 (AFB1), a potent mutagenic and carcinogenic substance in food and feedstuff. Minute AFB1 residues were assessed by competitive immunoassay facilitated on porous silicon Fabry-Pérot interferometer. The immunocomplex formation was biochemically amplified by enzymatic reaction products infiltrating the porous void and alternating the reflectivity spectra in correlation to the AFB1 content.