Abstract
"Poly(propylene-imine) (PPI) and poly(amidoamine) (PAMAM) dendrimers of different generations functionalized with 4-(4′-pentoxybenzoyloxy)salicylaldehyde (SA) promesogenic units were applied for the synthesis of silver (Ag) nanoparticles in tetrahydrofuran–water mixture solution. Influence of the dendrimer type and their generations on formation and stability of nanoparticles were studied. Structural and optical properties of Ag nanoparticles, and their modifications with aging were characterized by means of transmission electron microscopy, UV–vis absorption and Fourier transform infrared spectroscopy. Experimental investigations showed that immediately after the synthesis the particles were of spherical shapes with slightly different sizes depending on the used dendrimer type, but independent of their generation. The dendrimer type strongly influenced particle modifications during the aging: particles protected with PPI–SA dendrimers undergone significant alterations in time both in their sizes and shapes, while the particles remained almost unchanged when PAMAM–SA dendrimers were used for their protection. We, therefore, presume that morphological differences of aged nanoparticles are mainly determined by different chemical structures of dendrimer cores rather than by their terminal groups; additional carbonyl groups in PAMAM–SA dendrimer core units play an important role in stabilizing Ag nanoparticles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
