| Texto completo | |
| Autor(es): |
Bougis, K.
[1]
;
Rubim, R. Leite
[2]
;
Ziane, N.
[1]
;
Peyencet, J.
[1]
;
Bentaleb, A.
[1]
;
Fevrier, A.
[1]
;
Oliveira, C. L. P.
[2]
;
Andreoli de Oliveira, E.
[2]
;
Navailles, L.
[1]
;
Nallet, F.
[1]
Número total de Autores: 10
|
| Afiliação do(s) autor(es): | [1] Univ Bordeaux, Ctr Rech Paul Pascal, CNRS, F-33600 Pessac - France
[2] Univ Sao Paulo, Inst Fis GFCx, BR-05314970 Sao Paulo, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | EUROPEAN PHYSICAL JOURNAL E; v. 38, n. 7 JUL 16 2015. |
| Citações Web of Science: | 4 |
| Resumo | |
Structure and interactions stabilising the lamellar stack of mixed lipid bilayers in their fluid state are investigated by means of small-angle X-ray scattering. The (electrically neutral) bilayers are composed of a mixtures of lecithin, a zwitterionic phospholipid, and Simulsol, a non-ionic cosurfactant with an ethoxylated polar head. The soft confinement of the bilayer hydrophilic components is varied by changing hydration and bilayer composition, as well as the length of the cosurfactant polar head. Structural transitions are observed at low hydration, in the stacking order for the longer cosurfactant, and in the mixed bilayers for the shorter one. At higher hydration, the swelling of the lamellar stacks occurs with a significant, but continuous evolution in the mixed bilayer structure. The bilayer structural changes are discussed in analogy with the so-called ``brush-to-mushroom{''} transition induced by lateral confinement, relevant for long linear polymers grafted onto rigid surfaces, taking also into account the role of vertical confinement. (AU) | |
| Processo FAPESP: | 11/16149-8 - Interações entre bicamadas de lipídios - o papel da constante de rigidez da membrana |
| Beneficiário: | Rafael Leite Rubim |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |