Fig. 3
From: Gold nanoparticle-labeled biosensor for rapid and sensitive detection of bacterial pathogens
a Schematic of the conjugation of Polyaniline (PANI)-coated magnetic nanoparticles (MNPs) and antibody; and (b) Scanning electron microscopy (SEM) image of an antibody-conjugated MNP bound to an E.coli O157:H7 cell [6]; used with permission from International Journal of Food Safety, Nutrition and Public Health (Inderscience retains copyright of the original article and figure)