Assessment of Size-Dependent Antimicrobial and Cytotoxic Properties of Silver Nanoparticles
Figure 2
Size and shape of AgNPs measured by TEM and DLS (a–c). Comparison of nanoparticle sizes obtained by two different measurement techniques, image analysis of the particles’ TEM results and DLS of particle suspension. Smaller nanoparticles (< 10 nm) can be observed in TEM image analysis results ((a), left) as well as in DLS result ((b), white bars). Lager particles are also shown in a TEM result ((a), right) and in DLS spectra ((b), black bars). (c) Summaries of the physicochemical characteristics of AgNPs tested in the study. Polydispersity indexes of two different size particles were similar at the values of 0.21 for 10 nm and 0.32 for 100 nm AgNPs. Size of particles varies depending on the measurement technique applied. Strong negativity of zeta potentials for AgNPs solution is because of the citrates on the surface of them.
