Thermal unbinding of highly oriented phospholipid membranes

被引：103

作者：

Vogel, M

Münster, C

Fenzl, W

Salditt, T

机构：

[1] Univ Munich, Sekt Phys, D-80539 Munich, Germany

[2] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.84.390

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a temperature dependent x-ray reflectivity study of highly oriented, fully hydrated multilamellar phospholipid membranes. Both the specular and diffuse (nonspecular) x-ray reflectivity were measured for dimyristoyl-sn-glycero-phosphocholine (DMPC) and oleoyl-palmitoyl-sn-glycero-phosphocholine (POPC) on silicon substrates in excess water. In this configuration the repeat distance as well as the fluctuation spectra can be determined as a function of temperature. Both model systems studied exhibit a discontinuous unbinding transition from a substrate bound, multilamellar state to a state of freely dispersed bilayers in water. In the unbound phase a single membrane remains on the substrate.

引用

页码：390 / 393

页数：4

共 17 条

[1] OBSERVATION OF ALGEBRAIC DECAY OF POSITIONAL ORDER IN A SMECTIC LIQUID-CRYSTAL [J].

ALSNIELSEN, J ;

LITSTER, JD ;

BIRGENEAU, RJ ;

KAPLAN, M ;

SAFINYA, CR ;

LINDEGAARDANDERSEN, A ;

MATHIESEN, S .

PHYSICAL REVIEW B, 1980, 22 (01) :312-320

[2] CAPILLARY WAVES ON THE SURFACE OF SIMPLE LIQUIDS MEASURED BY X-RAY REFLECTIVITY [J].

BRASLAU, A ;

PERSHAN, PS ;

SWISLOW, G ;

OCKO, BM ;

ALSNIELSEN, J .

PHYSICAL REVIEW A, 1988, 38 (05) :2457-2470

[3]

CAILLE A, 1972, CR ACAD SCI B PHYS, V274, P891

[4] X-RAY-SCATTERING IN SMECTIC-A LIQUID-CRYSTALS [J].

GUNTHEN, L ;

IMRY, Y ;

LAJZEROWICZ, J .

PHYSICAL REVIEW A, 1980, 22 (04) :1733-1740

[5]

Lipowsky R., 1995, P521

[6] UNBINDING TRANSITIONS OF INTERACTING MEMBRANES [J].

LIPOWSKY, R ;

LEIBLER, S .

PHYSICAL REVIEW LETTERS, 1986, 56 (23) :2541-2544

[7] UNBINDING TRANSITION OF A BIOLOGICAL MODEL MEMBRANE [J].

MUTZ, M ;

HELFRICH, W .

PHYSICAL REVIEW LETTERS, 1989, 62 (24) :2881-2884

[8] UNBINDING OF SYMMETRICAL AND ASYMMETRIC STACKS OF MEMBRANES [J].

NETZ, RR ;

LIPOWSKY, R .

PHYSICAL REVIEW LETTERS, 1993, 71 (21) :3596-3599

[9] Bending rigidity of phosphatidylcholine bilayers. Dependences on experimental method, sample cell sealing and temperature [J].

Niggemann, G. ;

Kummrow, M. ;

Helfrich, W. .

Journal De Physique, II, 1995, 5 (03)

[10]

NING L, 1995, J PHYS II, V5, P1155

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