Spectrometer-free plasmonic biosensor for rapid detection of egg allergen ovomucoid

This study introduces a compact, spectrometer-free plasmonic biosensor integrating metasurfaces, antifouling chemistry, and simple imaging for sensitive, label-free detection of food allergens. Its scalability, ease of use, and compatibility with smartphone-based analysis highlight its potential for on-site applications and pave the way for self-used food allergen testing.