Abstract
Abstract Formation of silver nanoparticle monolayers on polydiallyldimethylammonium chloride (PDADMAC), modified mica was studied in situ by the streaming potential measurements, ex situ atomic force microscopy (AFM), and scanning electron microscopy (SEM). The silver nanoparticles were obtained in a green synthesis involving AgNO3 precursor, using glucose and sucrose serving as both reducing and stabilizing agents. The average size of the nanoparticles was 48 nm. The dynamic light scattering measurements showed that the silver nanoparticle suspension was stable for the time period up to 60 days. The electrophoretic mobility measurements revealed that the nanoparticles were negatively charged, with zeta potential increasing with the ionic strength from −75 mV at 10−5 M to −42 mV at 2 × 10−2 M. The effect of ionic strength on the nanoparticle deposition kinetics on PDADMAC monolayer was also quantitatively determined. A significant increase of the nanoparticle coverage with macrocation coverage suggested that the deposition of the nanoparticles occurred only on local adsorption sites, consisting of a few macrocation molecules exhibiting large positive charge. The obtained results can find practical applications in constructing biocompatible materials serving for bioparticle immobilization and biofilm formation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.