Large-scale dynamics of a single polymer chain under severe confinement.
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.
Lagrené
Karine
K
CEA/IRAMIS/Laboratoire Léon Brillouin, CEA-CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France.
Zanotti
Jean-Marc
JM
Daoud
Mohamed
M
Farago
Bela
B
Judeinstein
Patrick
P
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
D011108:Polymers; D011092:Polyethylene Glycols