Changes in the structure of tethered chain molecules as predicted by density functional approach

Details Changes in the structure of tethered chain molecules as predicted by density functional approach Changes in the structure of tethered chain molecules as predicted by density functional approach

2012-02-20

arxiv.org/abs/1202.4284v1

Condens. Matter Phys., 2011, vol. 14, No. 3, p. 33604: 1-13

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 7 figures

Scientific paper

10.5488/CMP.14.33604

We use a version of the density functional theory to study the changes in the height of the tethered layer of chains built of jointed spherical segments with the change of the length and surface density of chains. For the model in which the interactions between segments and solvent molecules are the same as between solvent molecules we have discovered two effects that have not been observed in previous studies. Under certain conditions and for low surface concentrations of the chains, the height of the pinned layer may attain a minimum. Moreover, for some systems we observe that when the temperature increases, the height of the layer of chains may decrease.

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