Direct Synthesis and Morphological Characterization of Gold-Dendrimer Nanocomposites Prepared Using PAMAM Succinamic Acid Dendrimers: Preliminary Study of the Calcification Potential

Figure 8

TEM and HR-TEM micrographs characteristic for Au-G6-5 at 60 minutes ((a)–(c)) and 48 hours ((d)–(f)), respectively, after preparation. (a) General appearance of not-yet agglomerated nanoparticles; (b) spheroid and irregular nanoparticles and gold accumulating in the intermolecular space (black arrows); (c) detailed view of crystalline nanocomposites; (d) nanoparticles forming a cluster after 48 hours after their synthesis; (e) few nanoparticles and low concentrations of metal (zoomed area is indicated in black rectangles); (f) HR-TEM micrograph of polycrystalline spherical nanoparticles, with organic layer at the periphery and SAED as an inset. Size-distribution histograms are shown.