Liquid Crystal Alignment on Carbonaceous Surfaces with Orientational Order

We used near-edge x-ray absorption fine structure (NEXAFS) spectroscopy to link the orientational bond order at three carbonaceous surfaces-rubbed polyimide, ion beam-irradiated polyimide, and ion beam-irradiated diamond-like carbon films-with the direction of liquid crystal (LC) alignment on these...

Full description

Saved in:
Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2001-06, Vol.292 (5525), p.2299-2302
Main Authors: Stöhr, J., Samant, M. G., Lüning, J., Callegari, A. C., Chaudhari, P., Doyle, J. P., Lacey, J. A., Lien, S. A., Purushothaman, S., Speidell, J. L.
Format: Article
Language:English
Subjects:
Carbon
Condensed matter: structure, mechanical and thermal properties
Cosmic microwave background radiation
Crystals
Exact sciences and technology
Liquid crystalline polymers
Liquid crystals
Material films
Materials science
Memory interference
Neurons
Orbitals
Orientational order of liquid crystals
electric and magnetic field effects on order
Photons
Physics
Polymer liquid crystals
Polymers
Scientific imaging
Structure of solids and liquids
crystallography
Time constants
X-rays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We used near-edge x-ray absorption fine structure (NEXAFS) spectroscopy to link the orientational bond order at three carbonaceous surfaces-rubbed polyimide, ion beam-irradiated polyimide, and ion beam-irradiated diamond-like carbon films-with the direction of liquid crystal (LC) alignment on these surfaces. We show that, in general, LC alignment can be created on any carbonaceous substrate by inducing orientational order at its surface. Our results form the scientific basis for LC alignment layers consisting of amorphous carbon films in which orientational order near the surface is induced by a directional low-energy ion beam.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1059866