ISIS Neutron and Muon Source Data Journal

Modification of an adsorbed cationic layer by anionic surfactants below the CMC

Abstract: In this proposal, we request beamtime to study the unexpected behaviour of a strongly bound bilayer of the cationic surfactant didodecyldimethylammonium bromide on the anionic mica surface in the presence of the anionic surfactant sodium dodecyl sulfate. This builds on previous work at ISIS where a cationic surfactant layer was found to be persistent to an extended wash with water and salt solutions, but upon exposure to sodium dodecyl sulfate at the critical micelle concentration the layer completely desorped from the surface. At concentrations below the critical micelle concentration however, the adsorbed layer was observed to thicken and it is the structure of the modified layer that is the focus of this proposal.

Principal Investigator: Professor Stuart Clarke
Experimenter: Dr Ibrahim Salama
Experimenter: Mr Fin Allen
Local Contact: Dr Jos Cooper
Experimenter: Ms Rose Ng
Experimenter: Dr Chris Truscott
Experimenter: Miss Anna Smith

DOI: 10.5286/ISIS.E.RB1820048

ISIS Experiment Number: RB1820048

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Stuart Clarke et al; (2018): Modification of an adsorbed cationic layer by anionic surfactants below the CMC, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820048

Data is released under the CC-BY-4.0 license.