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- W155219747 abstract "A description of the state of amphiphilic molecules in ionic micelles is presented. This description is dubbed “the standard picture of ionic micelles” because the evidence supporting it is by now overwhelming. A simple theoretical model for the packing of chains in amphiphilic aggregates is presented. The model is based on the standard picture. Aggregates are assumed to have symmetrical hydrophobic cores in which only the chains may exist. The model involves generating all possible internal bond sequences — trans, gauche + and gauche − at each bond — of a single amphiphilic molecule. The probabilities of these different conformations are constrained in such a way that, when an ensemble average is taken over all conformations, the hydrophobic core of the aggregate is packed at liquid hydrocarbon density throughout. To a limited extent the chains may also exist outside the core, in which case they incur a hydrophobic free energy cost. The model accurately reproduces the static properties of a recent molecular dynamics simulation of a bilayer containing 128 chains. For spherical micelles the model is in good agreement with neutron diffraction experiments which measure the mean position and freedom of movement of the terminal methyl groups. It is in excellent agreement with NMR T 1 relaxation experiments from which an order parameter down the amphiphile chain can be deduced. Evidence which has been claimed to invalidate the standard picture of ionic micelles is examined in detail and found wanting." @default.
- W155219747 created "2016-06-24" @default.
- W155219747 creator A5022353207 @default.
- W155219747 date "2007-12-04" @default.
- W155219747 modified "2023-10-16" @default.
- W155219747 title "The standard picture of ionic micelles" @default.
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- W155219747 doi "https://doi.org/10.1007/bfb0114299" @default.
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