ZB 10 - Soft Condensed Matter (R. Holyst)

Ionic Strength-Controlled Deposition of Charged Nanoparticles on a Solid Substrate

Author(s): Winkler, Katarzyna and Paszewski, Maciej and Kalwarczyk, Tomasz and Ewelina and Wojciechowski, Tomasz and Gorecka, Ewa and Pociecha, Damian and Holyst, Robert and Fialkowski, Marcin
Title: Ionic Strength-Controlled Deposition of Charged Nanoparticles on a Solid Substrate
Abstract: There is experimental evidence that in solutions of low ionic strength, nanoparticles (NPs) adsorbing onto an oppositely charged cannot form dense monolayers due to the electrostatic Here, we investigated the adsorption onto negatively charged occurring in solutions containing positively charged NPs and for a wide range of ionic strengths. We found that the salt added high concentration, above 2M, stabilizes the solution and the NPs on the substrate to form dense coatings characterized by the coverage of about 50\%. In this regime, the adsorption rate was to grow with the square of the NP concentration. This effect of on the deposition process provides a facile method of coating of substrates with NP monolayers. The density of such monolayers on and can be easily controlled by the deposition time, as well as by the salt and NP concentration in the plating solution.
Pages: 19096-19103
Journal: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 115
ID: ISI:000295245500024
Year: 2011
DOI: 10.1021/jp206704s