Depletion and cluster formation in soft colloid-polymer mixtures

被引：61
|
作者：
Stiakakis, E [1 ]
Petekidis, G
Vlassopoulos, D
Likos, CN
Iatrou, H
Hadjichristidis, N
Roovers, J
机构：
[1] FORTH, Inst Elect Struct & Laser, Iraklion, Greece
[2] Univ Crete, Dept Chem, Iraklion, Greece
[3] Univ Crete, Dept Mat Sci & Technol, Iraklion, Greece
[4] Univ Dusseldorf, Inst Theoret Phys 2, Dusseldorf, Germany
[5] Univ Athens, Dept Chem, Athens, Greece
[6] NRC, Inst Natl Chem Proc & Environm Technol, Ottawa, ON, Canada
来源：
EUROPHYSICS LETTERS | 2005年 / 72卷 / 04期
关键词：
D O I：
10.1209/epl/i2005-10283-y
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dynamics of colloidal star-linear homopolymer mixtures is investigated by photon correlation spectroscopy. In dilute star solutions, osmotic forces due to the added polymers lead initially to a shrinkage of the stars and eventually, at higher polymer concentrations, to stable star clusters. Furthermore, concentrated glassy star solutions melt upon addition of small amounts of linear polymers, as manifested by the remarkable speed-up of the star self-diffusion. Quantitative description of the experimental findings is provided by calculations of the effective star-star pair potential.
引用
收藏
页码：664 / 670
页数：7
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