Fig. 2

Synthesis and characterization of AuNPs with different methods (a and b). Schematic of the fabrication method. (c) FESEM images of the AuNPs without antibody; (d) Diagram of the size distribution of AuNPs based on measurement of the diameter of 800 AuNPs; (e) Dynamic light scattering analysis for determination of the z-average hydrodynamic diameter of the AuNPs