Anomalous Layer at a Nematic-Air Interface

DOI

The aim is to establish the nature of the surface layer of 8CB at the nematic-air interface by measuring neutron reflection from three differently deuterated versions of 8CB. Nematic-air is the simplest possible homeotropic nematic surface and so represents the baseline for future studies of homeotropic alignment agents for devices. Comparison between the 3 isotopomers will establish the validity of deductions in terms of molecular ordering. There are 3 known possibilities for the smectic like layers characterized by different relationships between wave period, d, and the molecular length, l: (i) partial bilayer as found in the bulk smectic phase of the material (d=1.4l), (ii) monolayer (d=l) and (iii) full bilayer (d=2l). The data will be modeled to determine whether the first surface layer correspond to one of these or a new arrangement.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24003126
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24003126
Provenance
Creator Professor Rob Richardson
Publisher ISIS Neutron and Muon Source
Publication Year 2010
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2007-12-03T09:00:32Z
Temporal Coverage End 2007-12-07T21:20:39Z