title: Liquid crystal alignment on carbonaceous surfaces with orientational order.
abstract: 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 diamondlike 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.
authors: IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA.
authors: J
authors: J
authors: Stohr
authors: M G
authors: MG
authors: Samant
authors: J
authors: J
authors: Luning
authors: A C
authors: AC
authors: Callegari
authors: P
authors: P
authors: Chaudhari
authors: J P
authors: JP
authors: Doyle
authors: J A
authors: JA
authors: Lacey
authors: S A
authors: SA
authors: Lien
authors: S
authors: S
authors: Purushothaman
authors: J L
authors: JL
authors: Speidell