Figure 2.
Characterization of Ru(phen)-doped silica nanoparticles (RuNPs) and silver nanoparticles (AgNPs) used in AgNP–RuNP–cLFIA sensor: (a) Transmission electron microscopy (TEM) images of RuNPs; (b) TEM images of AgNPs; (c) Ultraviolet absorption spectrum of the AgNPs and fluorescence excitation and emission spectra of the RuNPs.