Fig. 1From: Nanodetection of Head and Neck Cancer on Titanium Oxide Sensing Surfacea Schematic representation for the detection of SCC-Ag. IDE-TiO2 surface was modified into amine by APTES followed by the immobilization of antibody or GNS antibody. The amine group from APTES react carboxyl group on the antibody. SCC-Ag was detected by the interaction at the antigenic region and compared. b UV-Vis spectroscopy measurements with GNS. Scanning was in the region between 480 and 560 nM, and the peak maxima were ~ 530 nM. GNS with and without antibody are indicated by the arrowsBack to article page