Confinement Induced Polarization effects in Valence and Inner-shell Spectra of Atactic Polystyrene

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dc.creatorChattopadhyay, Sudeshna
dc.creatorDatta, A.
dc.creatorGiglia, A.
dc.creatorMahne, N.
dc.creatorNannarone, S.
dc.date2007-09-17
dc.date2007-09-18
dc.date.accessioned2026-07-07T08:29:57Z
dc.date.available2026-07-07T08:29:57Z
dc.descriptionVacuum ultraviolet (VUV) transmission spectra show a clear polarization effect in pi electronic transition in spin coated atactic polystyrene (aPS) films of thickness below 4Rg, where Rg (~20.4nm) is the radius of gyration of the polymer. This transition associated with pendant benzene rings in polystyrene. The polarization effect clearly indicates pendant benzene ring alignment on a macroscopic scale. Study of core electron (1s) transition through near edge x-ray absorption fine structure (NEXAFS) spectroscopy confirms the ordering and shows that the rings are oriented towards out-of-plane direction with a tilt angle ~63 degree with the sample plane, which is consistent with the observed in-plane (sample surface) VUV polarization. These results indicate the transition of a common polymer, like polystyrene, inherently disordered in the bulk, to an orientationally ordered phase under a certain degree of confinement.
dc.descriptionRevised Version with all figures
dc.identifierhttps://arxiv.org/abs/0709.2528
dc.identifierhttp://arxiv.org/abs/0709.2528
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/138121
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.titleConfinement Induced Polarization effects in Valence and Inner-shell Spectra of Atactic Polystyrene
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