Fluctuation dynamics of block copolymer vesicles

被引：37
作者：
Falus, P [1 ]
Borthwick, MA
Mochrie, SGJ
机构：
[1] Yale Univ, Dept Phys, New Haven, CT 06511 USA
[2] MIT, Dept Phys, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.94.016105
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
X-ray photon correlation spectroscopy was used to characterize the wave-vector- and temperature-dependent dynamics of spontaneous thermal fluctuations in a vesicle (L-4) phase that occurs in a blend of a symmetric poly(styrene-ethylene/butylene-styrene) triblock copolymer with a polystyrene homopolymer. Measurements of the intermediate scattering function reveal stretched-exponential behavior versus time, with a stretching exponent slightly larger than 2/3. The corresponding relaxation rates show an approximate q(3) dependence versus wave vector. Overall, the experimental measurements are well described by theories that treat the dynamics of independent membrane plaquettes.
引用
收藏
页数：4
相关论文
共 33 条
[1]   Hyperviscous diblock copolymer vesicles [J].
Dimova, R ;
Seifert, U ;
Pouligny, B ;
Förster, S ;
Döbereiner, HG .
EUROPEAN PHYSICAL JOURNAL E, 2002, 7 (03) :241-250
[2]   Polymersomes: Tough vesicles made from diblock copolymers [J].
Discher, BM ;
Won, YY ;
Ege, DS ;
Lee, JCM ;
Bates, FS ;
Discher, DE ;
Hammer, DA .
SCIENCE, 1999, 284 (5417) :1143-1146
[3]   Concentration fluctuations in the binary mixture hexane-nitrobenzene with static and dynamic x-ray scattering [J].
Dufresne, EM ;
Nurushev, T ;
Clarke, R ;
Dierker, SB .
PHYSICAL REVIEW E, 2002, 65 (06) :1-061507
[4]   BILAYER BENDING ELASTICITY MEASURED BY FOURIER-ANALYSIS OF THERMALLY EXCITED SURFACE UNDULATIONS OF FLACCID VESICLES [J].
ENGELHARDT, H ;
DUWE, HP ;
SACKMANN, E .
JOURNAL DE PHYSIQUE LETTRES, 1985, 46 (08) :L395-L400
[5]   Symmetric-to-asymmetric transition in triblock copolymer-homopolymer blends [J].
Falus, P ;
Xiang, H ;
Borthwick, MA ;
Russell, TP ;
Mochrie, SGJ .
PHYSICAL REVIEW LETTERS, 2004, 93 (14) :145701-1
[6]   Fast CCD camera for x-ray photon correlation spectroscopy and time-resolved x-ray scattering and imaging [J].
Falus, P ;
Borthwick, MA ;
Mochrie, SGJ .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2004, 75 (11) :4383-4400
[7]   SHAPE AND SIZE FLUCTUATIONS OF MICROEMULSION DROPLETS - THE ROLE OF COSURFACTANT [J].
FARAGO, B ;
RICHTER, D ;
HUANG, JS ;
SAFRAN, SA ;
MILNER, ST .
PHYSICAL REVIEW LETTERS, 1990, 65 (26) :3348-3351
[8]   The effect of the charge density of microemulsion droplets on the bending elasticity of their amphiphilic film [J].
Farago, B ;
Gradzielski, M .
JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (22) :10105-10122
[9]   2ND-ORDER TRANSITION TEMPERATURES AND RELATED PROPERTIES OF POLYSTYRENE .1. INFLUENCE OF MOLECULAR WEIGHT [J].
FOX, TG ;
FLORY, PJ .
JOURNAL OF APPLIED PHYSICS, 1950, 21 (06) :581-591
[10]  
FREY E, 1991, J PHYS I, V1, P1715, DOI 10.1051/jp1:1991238
1234