Synchrotron x-ray-scattering studies on the sodium dodecyl sulfate-water-pentanol-dodecane L-3 sponge phase

被引:47
作者
Lei, N
Safinya, CR
Roux, D
Liang, KS
机构
[1] EXXON RES & ENGN CO,CORP RES LAB,ANNANDALE,NJ 08801
[2] RUTGERS STATE UNIV,DEPT PHYS,PISCATAWAY,NJ 08855
[3] UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106
[4] UNIV CALIF SANTA BARBARA,BIOCHEM & MOL BIOL PROGRAM,SANTA BARBARA,CA 93106
[5] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106
[6] CTR RECH PAUL PASCAL,F-33405 TALENCE,FRANCE
来源
PHYSICAL REVIEW E | 1997年 / 56卷 / 01期
关键词
D O I
10.1103/PhysRevE.56.608
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
High-resolution small-angle x-ray-scattering (SAXS) data in the quaternary sodium dodecyl sulfate-water-pentanol-dodecane membrane system in the L-3 phase were collected and analyzed. The SAXS data show a broad peak followed by q(-2) and q(-4) regions at higher q. The data an described quantitatively by the product of a structure factor of 1 + C(1)arctan(q xi(1)/2)/q + C-2/[1/xi(2)(2)+(\q\ - q(c))(2)] and a form factor of a randomly oriented disks. The C-1 term is the structure factor develop by Cates et al. [Europhys. Lett. 5, 733 (1988)], describing a bicontinuous phase with randomly connected bilayer sheets separating the space at length scales larger than the typical cell size L. The C-2 term, introduced because of the observation of the broad peak centered around q(c) in the SAXS data, describes the bilayer cell-cell correlations. For high dilution samples, the form factor alone can describe the data very well. From our data of the water layer volume fraction and L = 2 pi/q(c), we have determined that for every volume of (2 pi/q(c))(3), the membrane has an area of (1.3-1.8)(2 pi/q(c))(2). This is consistent with a bicontinuous structure for the L-3 membrane system. The logarithmic increase of the water layer area with 2 pi/q(c) is due to the membrane thermal undulations. The bending rigidity of the membrane has been found to be (1.0+/-0.2)k(B)T.
引用
收藏
页码:608 / 613
页数:6
相关论文
共 26 条
[1]   RANDOM SURFACE MODEL FOR THE L3-PHASE OF DILUTE SURFACTANT SOLUTIONS [J].
CATES, ME ;
ROUX, D ;
ANDELMAN, D ;
MILNER, ST ;
SAFRAN, SA .
EUROPHYSICS LETTERS, 1988, 5 (08) :733-739
[2]   A PHASE OF LIPOSOMES WITH ENTANGLED TUBULAR VESICLES [J].
CHIRUVOLU, S ;
WARRINER, HE ;
NARANJO, E ;
IDZIAK, SHJ ;
RADLER, JO ;
PLANO, RJ ;
ZASADZINSKI, JA ;
SAFINYA, CR .
SCIENCE, 1994, 266 (5188) :1222-1225
[3]  
Cotton F.A., 1988, Advanced Inorganic Chemistry
[4]   SOFT MATTER [J].
DEGENNES, PG .
REVIEWS OF MODERN PHYSICS, 1992, 64 (03) :645-648
[5]   MICRO-EMULSIONS AND THE FLEXIBILITY OF OIL-WATER INTERFACES [J].
DEGENNES, PG ;
TAUPIN, C .
JOURNAL OF PHYSICAL CHEMISTRY, 1982, 86 (13) :2294-2304
[6]   Nontopological saddle-splay and curvature instabilities from anisotropic membrane inclusions [J].
Fournier, JB .
PHYSICAL REVIEW LETTERS, 1996, 76 (23) :4436-4439
[7]   EXPERIMENTAL-EVIDENCE FOR RANDOM SURFACE-STRUCTURES IN DILUTE SURFACTANT SOLUTIONS [J].
GAZEAU, D ;
BELLOCQ, AM ;
ROUX, D ;
ZEMB, T .
EUROPHYSICS LETTERS, 1989, 9 (05) :447-452
[8]  
Hansen J P., 2013, Theory of Simple Liquids: With Applications to Soft Matter
[9]   ELASTIC PROPERTIES OF LIPID BILAYERS - THEORY AND POSSIBLE EXPERIMENTS [J].
HELFRICH, W .
ZEITSCHRIFT FUR NATURFORSCHUNG C-A JOURNAL OF BIOSCIENCES, 1973, C 28 (11-1) :693-703
[10]  
HELFRICH W, 1978, Z NATURFORSCH A, V33, P305