| AVS 63rd International Symposium & Exhibition | |
| Surface Science | Wednesday Sessions |
| Session SS+AS-WeM |
| Session: | Environmental Interfaces, Ambient Surfaces, and In-Operando Studies |
| Presenter: | John Newberg, University of Delaware |
| Authors: | J. Newberg, University of Delaware C. Arble, University of Delaware Y. Khalifa, University of Delaware A. Broderick, University of Delaware S. Rani, University of Delaware |
| Correspondent: | Click to Email |
Ionic interfaces are ubiquitous in physical, chemical, biological, environmental and technological processes. Herein we will present recent efforts examining ionic liquid and deliquescent salt interfaces using lab-based ambient pressure X-ray photoelectron spectroscopy (APXPS) in the presence of water vapor. The onset to water uptake into the top few nm of a hydrophilic ionic liquid is surprisingly similar to hydrophilic solid surfaces. A hydrophilic salt zinc bromide was also probed as it transitions from a solid to a liquid. It will be shown for ionic solutions that the uptake of water leads to variable shifts in the binding energy of anion and cation moieties driven by their interaction with water.