Phase behavior of ionic microgels -: art. no. 068301

被引：124
作者：
Gottwald, D
Likos, CN
Kahl, G
Löwen, H
机构：
[1] Vienna Tech Univ, Ctr Computat Mat Sci, A-1040 Vienna, Austria
[2] Vienna Tech Univ, Inst Theoret Phys, A-1040 Vienna, Austria
[3] Univ Dusseldorf, Inst Theoret Phys 2, D-40225 Dusseldorf, Germany
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.92.068301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We employ effective interaction potentials between spherical polyelectrolyte microgels in order to investigate theoretically the structure, thermodynamics, and phase behavior of ionic microgel solutions. Combining a genetic algorithm with accurate free energy calculations we are able to perform an unrestricted search of candidate crystal structures. Hexagonal, body-centered orthogonal, and trigonal crystals are found to be stable at high concentrations and charges of the microgels, accompanied by reentrant melting behavior and fluid-fcc-bcc transitions below the overlap concentration.
引用
收藏
页数：4
相关论文
共 34 条
[1]   Prediction of the interaction potential of microgel particles from rheometric data. Comparison with different models [J].
Berli, CLA ;
Quemada, D .
LANGMUIR, 2000, 16 (26) :10509-10514
[2]   Counterion penetration and effective electrostatic interactions in solutions of polyelectrolyte stars and microgels [J].
Denton, AR .
PHYSICAL REVIEW E, 2003, 67 (01) :10
[3]   MICROPHASE SEPARATION IN POOR-SOLVENT POLYELECTROLYTE SOLUTIONS - PHASE-DIAGRAM [J].
DORMIDONTOVA, EE ;
ERUKHIMOVICH, IY ;
KHOKHLOV, AR .
MACROMOLECULAR THEORY AND SIMULATIONS, 1994, 3 (04) :661-675
[4]   Preparation and properties of starch-based colloidal microgels [J].
Dziechciarek, Y ;
van Soest, JJG ;
Philipse, AP .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2002, 246 (01) :48-59
[5]   Investigation of the swelling response and loading of ionic microgels with drugs and proteins: The dependence on cross-link density [J].
Eichenbaum, GM ;
Kiser, PF ;
Dobrynin, AV ;
Simon, SA ;
Needham, D .
MACROMOLECULES, 1999, 32 (15) :4867-4878
[6]   Reversible aggregation of soft particles [J].
Fernández-Nieves, A ;
Fernández-Barbero, A ;
Vincent, B ;
de las Nieves, FJ .
LANGMUIR, 2001, 17 (06) :1841-1846
[7]   Charge controlled swelling of microgel particles [J].
Fernández-Nieves, A ;
Fernández-Barbero, A ;
Vincent, B ;
de las Nieves, FJ .
MACROMOLECULES, 2000, 33 (06) :2114-2118
[8]   Structural arrest in dense star-polymer solutions [J].
Foffi, G ;
Sciortino, F ;
Tartaglia, P ;
Zaccarelli, E ;
Lo Verso, F ;
Reatto, L ;
Dawson, KA ;
Likos, CN .
PHYSICAL REVIEW LETTERS, 2003, 90 (23) :4
[9]  
Goldbert DE, 1989, GENETIC ALGORITHMS S
[10]  
GOTTWALD D, IN PRESS
1234