Abstract
The interactions of negatively charged gold nanoparticles with positively charged poly(2-vinylpyridine) microgel particles, initially in either their collapsed (pH 6) or swollen (pH 3) states, have been studied in aqueous dispersion. When the gold nanoparticles are mixed with the collapsed microgel particles, at pH 6, they adsorb around the surface of the microgel particles, having no appreciable affect on the size or structure of the microgel particles. However, this uptake of the anionic nanoparticles onto the surface of the microgel particles does lead to a reversal of the surface charge of the latter. When the gold nanoparticles are mixed with swollen cationic microgel particles at pH 3, the anionic gold nanoparticles are initially taken up into the interior of the cationic polymer network, due to electrostatic attraction. Addition of further gold particles leads to the (irreversible) collapse and reversal of sign of the microgel particles. The amount of gold particles absorbed into the interior of the microgel particles is found to decrease with increasing cross-linker content of the P2VP particles.
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 callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
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.
