Imperial College London

ProfessorJohnSeddon

Faculty of Natural SciencesDepartment of Chemistry

Professor of Chemical Physics
 
 
 
//

Contact

 

+44 (0)20 7594 5797j.seddon Website

 
 
//

Location

 

207EMolecular Sciences Research HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Leivers:2019:10.1021/acs.langmuir.8b03555,
author = {Leivers, M and Seddon, JM and Declercq, M and Robles, ESJ and Luckham, PF},
doi = {10.1021/acs.langmuir.8b03555},
journal = {Langmuir},
pages = {729--738},
title = {Measurement of forces between supported cationic bilayers by colloid probe atomic force microscopy: electrolyte concentration and composition},
url = {http://dx.doi.org/10.1021/acs.langmuir.8b03555},
volume = {35},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The interactions between supported cationic surfactant bilayers were measured by colloidal probe atomic force spectroscopy and the effect of different halide salts was investigated. Di(alkyl iso-propyl ester) dimethyl ammonium methylsulfate (DIPEDMAMS) bilayers were fabricated by the vesicle fusion technique on muscovite mica. The interactions between the bilayers were measured in increasing concentrations of NaCl, NaBr, NaI and CaCl2. In NaCl the bilayer interactions were repulsive at all concentrations investigated, and the Debye length and surface potential were observed to decrease with increasing concentration. The interactions were found to follow the Electrical Double Layer (EDL) component of DLVO theory well. However Van der Waals forces were not detected, instead a strong hydration repulsion was observed at short separations. CaCl2 had a similar effect on the interactions as NaCl. NaBr and NaI were observed to be more efficient at decreasing the surface potential than the chloride salts, with the efficacy increasing with the ionic radius.
AU - Leivers,M
AU - Seddon,JM
AU - Declercq,M
AU - Robles,ESJ
AU - Luckham,PF
DO - 10.1021/acs.langmuir.8b03555
EP - 738
PY - 2019///
SN - 0743-7463
SP - 729
TI - Measurement of forces between supported cationic bilayers by colloid probe atomic force microscopy: electrolyte concentration and composition
T2 - Langmuir
UR - http://dx.doi.org/10.1021/acs.langmuir.8b03555
UR - https://www.ncbi.nlm.nih.gov/pubmed/30562468
UR - http://hdl.handle.net/10044/1/69311
VL - 35
ER -