Performance of Eudragit coated whispering gallery mode resonators based immunosensors

Whispering gallery mode resonators (WGMR) are an efficient tool for the realisation of optical biosensors. A high Q factor preservation is a crucial requirement for the good biosensor performances. In this work we present Eudragit®L100 coated microspherical WGMR as an efficient immunosensor. The developed protocol was morphologically characterized using fluorescence microscopy. The functionalization process was tuned to preserve the high Q factor of resonator. The protein binding assay was optically characterized in terms of specificity in buffer solution