Fig. 4From: Streptavidin Modified ZnO Film Bulk Acoustic Resonator for Detection of Tumor Marker Mucin 1Comparison of the resonant frequency after every step of the reaction: the bare device f 0, after streptavidin self-assembly on the FBAR f 1, streptavidin-immobilized FBAR cannot bind with AuNPs-MUC1 ampters chelates without MUC1 target molecules f 2′, and streptavidin-immobilized FBAR binding with AuNPs-MUC1 ampters chelates with MUC1 target molecules f 2 Back to article page