Abstract

Quasi-elastic laser light scattering (QELS) from thermally excited capillary waves on the polarised water/1,2-dichloroethane interface was measured using optical heterodyne mixing technique. Interfacial potential difference was controlled by equilibrium partition of tetraethylammonium, tetrapropylammonium, tetrabutylammonium or tetrapentylammonium bromide. Frequency of the capillary wave of a selected wavelength was shown to decrease with the increasing electrolyte concentration. Frequency decrease was related to the decreasing interfacial tension being caused by the increasing relative surface excess of the electrolyte. No significant effect of the electrolyte concentration on the capillary wave damping was observed. Adsorption data obtained from these measurements are consistent with the results of the double layer capacity studies.

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 call

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.