title: Model for the planar-homeotropic anchoring transition induced by trans-cis isomerization.
abstract: We present a model to explain the planar-homeotropic anchoring transition of azobenzene induced by UV illumination via trans-cis isomerization. We consider bulk and surface as two different phases (separated by an infinitely sharp interface) which are in equilibrium. We obtain a relation for the exposure time after which the transition takes place.
authors.affiliation: Dipartimento di Fisica, and Instituto Nazionale di Fisica della Materia (INFM), Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Barbero
authors.forename: V
authors.initials: V
authors.lastname: Popa-Nita