Fig. 3From: A Graphene Oxide-Based Fluorescent Aptasensor for the Turn-on Detection of CCRF-CEMCharacterization of GO-apt. a AFM images of GO and CEM-apt. b Surface zeta potential of FAM-apt, GO, and CEM-apt. Error bars indicate ± SD (n = 3). c UV-visible absorbance spectra of (a) GO, (b) FAM-apt, and (c) GO-aptBack to article page