We show that a periodic nanostructure patterned into a polymeric or indium tin oxide ͑ITO͒ surface is capable of aligning liquid crystal ͑LC͒ molecules. Gratings of different depths were created on thin polymeric or ITO surfaces with submicron and micron periods by superposition of ultraviolet plane waves. The depth of the gratings was varied by changing the fluence of the laser. This method allows to pattern orientations over small areas and does not suffer from the disadvantages of rubbing based alignment methods. LC alignment was tested by forming twisted nematic cells. Anchoring energies were calculated from measurements of the twist angles.
Gefurchte Oberflächen: Die geringe Zunahme an π‐Elektronencharakter beim Wechsel von einem phenyl‐ zu einem naphthylfunktionalisierten optischen Schalter kann große Folgen haben. Letzterer erzeugt eine gut definierte gefurchte Oberfläche (siehe Bild), die mit einer Methode zum kontaktlosen Schichtaufbau erhalten wurde. Ein solches Verfahren zur Anordnung von Flüssigkristallen, das auf einem hierarchischen Prozess beruht, erfordert keine Reinraumbedingungen.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.