title: Large-scale dynamics of a single polymer chain under severe confinement.
abstract: We address the dynamical behavior of a single polymer chain under nanometric confinement. We show how neutron spin-echo, combined with contrast matching and zero average contrast, makes it possible to, all at once, (i) match the intense porous detrimental elastic small angle neutron scattering contribution to the total intermediate scattering function I(Q,t) and (ii) measure the Q dependence of the dynamical modes of a single chain under confinement. The method presented here has a general relevance when probing the large scale dynamics of a system of large molecular mass under confinement.
authors.affiliation: CEA/IRAMIS/Laboratoire Léon Brillouin, CEA-CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: Karine
authors.initials: K
authors.lastname: Lagrené
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Zanotti
authors.forename: Mohamed
authors.initials: M
authors.lastname: Daoud
authors.forename: Bela
authors.initials: B
authors.lastname: Farago
authors.forename: Patrick
authors.initials: P
authors.lastname: Judeinstein
mesh_terms: D001703:Biophysics / Q000379:methods*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D036103:Nanotechnology / Q000379:methods; D009502:Neutrons; D011092:Polyethylene Glycols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D012212:Rheology; D012542:Scattering, Radiation
chemical_list: D011108:Polymers; D011092:Polyethylene Glycols