Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 11, Pages 3790-3794Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201512025
Keywords
electrical double layer; liquid microjets; potential drop; solid-liquid interface; Stern layer capacitance
Categories
Funding
- Swiss National Science Foundation [153578]
- Formas [2016-2013-673]
- Nanosphere centre of excellence
Ask authors/readers for more resources
The chemistry and physics of charged interfaces is regulated by the structure of the electrical double layer (EDL). Herein we quantify the average thickness of the Stern layer at the silica (SiO2) nanoparticle/aqueous electrolyte interface as a function of NaCl concentration following direct measurement of the nanoparticles' surface potential by X-ray photoelectron spectroscopy (XPS). We find the Stern layer compresses (becomes thinner) as the electrolyte concentration is increased. This finding provides a simple and intuitive picture of the EDL that explains the concurrent increase in surface charge density, but decrease in surface and zeta potentials, as the electrolyte concentration is increased.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available