TY - JOUR
T1 - Fluctuations of bare membranes and their modification on incorporation of polymers having equally spaced anchors
AU - Hu, Xuesong
AU - Biehl, Ralf
AU - Prud'homme, Robert K.
AU - Monkenbusch, Michael
AU - Lal, Jyotsana
N1 - Funding Information:
This work was funded by the US Department of Energy, BES-Materials Science, under Contract W-31-109-ENG-38.
PY - 2004/7/30
Y1 - 2004/7/30
N2 - Membrane undulations of highly ordered bare nonionic surfactant penta(ethyleneglycol) dodecyl ether (C12E5) multilayers were studied by neutron spin echo spectroscopy (NSE). The membrane relaxations profiles were fitted by a stretched exponential law S(q,t) = S(q)exp(Γqt)3/2, where S(q) is the static structure factor and Γq is the relaxation rate. The universal scaling law Γq∼q3 for qd/2π>1, where d is the inter-lamellar spacing was observed. From the dependence of Γq on d as obtained for different surfactant volume fractions, shows that intermembrane contributions are still important at these q values. A model comb-graft polymer with monodisperse Polyethylene glycol (PEG) blocks of 6kg/mol connecting C18 stearylamide hydrophobes, which serve as anchors, was introduced in the lamellar phase at increasing polymer concentration at two membrane volume fraction of 20% and 30% (Langmuir 18 (2002) 6).
AB - Membrane undulations of highly ordered bare nonionic surfactant penta(ethyleneglycol) dodecyl ether (C12E5) multilayers were studied by neutron spin echo spectroscopy (NSE). The membrane relaxations profiles were fitted by a stretched exponential law S(q,t) = S(q)exp(Γqt)3/2, where S(q) is the static structure factor and Γq is the relaxation rate. The universal scaling law Γq∼q3 for qd/2π>1, where d is the inter-lamellar spacing was observed. From the dependence of Γq on d as obtained for different surfactant volume fractions, shows that intermembrane contributions are still important at these q values. A model comb-graft polymer with monodisperse Polyethylene glycol (PEG) blocks of 6kg/mol connecting C18 stearylamide hydrophobes, which serve as anchors, was introduced in the lamellar phase at increasing polymer concentration at two membrane volume fraction of 20% and 30% (Langmuir 18 (2002) 6).
KW - Membrane
KW - Neutron scattering
KW - Polymer
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U2 - 10.1016/j.physb.2004.04.031
DO - 10.1016/j.physb.2004.04.031
M3 - Article
AN - SCOPUS:3242704211
SN - 0921-4526
VL - 350
SP - 217
EP - 219
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 4
ER -