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dc.contributor.authorBarroso-Bujans, Fabienne-
dc.contributor.authorFernández-Alonso, Félix-
dc.contributor.authorCerveny, Silvina-
dc.contributor.authorArrese-Igor, Silvia-
dc.contributor.authorAlegría, Ángel-
dc.contributor.authorColmenero de León, Juan-
dc.date.accessioned2014-09-09T07:59:15Z-
dc.date.available2014-09-09T07:59:15Z-
dc.date.issued2012-
dc.identifierdoi: 10.1021/ma202655f-
dc.identifierissn: 0024-9297-
dc.identifiere-issn: 1520-5835-
dc.identifier.citationMacromolecules 45(7): 3137-3144 (2012)-
dc.identifier.urihttp://hdl.handle.net/10261/101836-
dc.description.abstractWe explore the effects of chain size on the structure and dynamics of ethylene glycol (EG) and poly(ethylene oxide) (PEO) intercalated in graphite oxide (GO). To this end, EG as well as a PEO series of increasing chain length have been studied by means of high-resolution inelastic neutron spectroscopy. The neutron experiments are complemented by X-ray diffraction, differential scanning calorimetry, Fourier-transform infrared spectroscopy, and Raman scattering. We find that EG is accommodated in a layer of thickness ∼3 Å within the GO substrate and adopts a preferential, yet largely disordered, gauche conformation. Longer PEO chains give rise to a layer thickness in the range ∼3.0-3.4 Å characterized by planar zigzag (trans-trans-trans) conformations. Moreover, we observe a strong reduction of vibrational motions for the confined EG and polymer phases, as clearly evidenced by the disappearance, shift, and/or broadening of mode-specific inelastic neutron scattering spectral features, as well as by the complete suppression of crystallization. All of these effects are surprisingly insensitive to the length of the PEO chains. © 2012 American Chemical Society.-
dc.description.sponsorshipThe authors gratefully acknowledge the support of the Spanish Ministry of Education (MAT2007-63681), the Basque Government (IT-436-07). F.B.-B. acknowledges a JAE-Doc contract from CSIC. F.F.-A. acknowledges financial support from the U.K. Science and Technology Facilities Council.-
dc.publisherAmerican Chemical Society-
dc.rightsclosedAccess-
dc.titleTwo-dimensional subnanometer confinement of ethylene glycol and Poly(ethylene oxide) by neutron spectroscopy: Molecular size effects-
dc.typeartículo-
dc.identifier.doi10.1021/ma202655f-
dc.date.updated2014-09-09T07:59:15Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
dc.contributor.funderMinisterio de Educación (España)-
dc.contributor.funderEusko Jaurlaritza-
dc.contributor.funderConsejo Superior de Investigaciones Científicas (España)-
dc.contributor.funderScience and Technology Facilities Council (UK)-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003339es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000271es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003086es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
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