Surface-functionalized nanoparticles with liquid-like behavior: The role of the constituent components

被引：79
作者：
Bourlinos, A. B. [1 ]
Giannelis, E. P.
Zhang, Q.
Archer, L. A.
Floudas, G.
Fytas, G.
机构：
[1] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
[2] Cornell Univ, Sch Chem & Biomol Engn, Ithaca, NY 14853 USA
[3] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece
[4] FORTH, BRI, Ioannina, Greece
[5] FORTH, IESL, Dept Mat Sci, GR-71110 Iraklion, Crete, Greece
[6] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
来源：
EUROPEAN PHYSICAL JOURNAL E | 2006年 / 20卷 / 01期
关键词：
89; 75; -k Complex systems; 83; 10; Tv Structural and phase changes; 62; 25; +g Mechanical properties of nanoscale materials;
D O I：
10.1140/epje/i2006-10007-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ionically modified silica nanoparticles with large counter anions (sulfonate, isostearate) at two silica volume fractions (13 and 27%) form a viscous fluid and a glass but not crystalline solids. Dielectric spectroscopy, Brillouin scattering and shear rheometry were employed to investigate these new nanoparticle-based fluids. The glass transition temperature and hence the local dynamics are governed by the large counter anions, whereas the flow properties can be controlled by the spatial correlation between the nanoparticles, e.g. by tuning the volume fraction of hard cores and local interactions between segments in the soft corona. Liquid-like ordering of the cores was revealed by X-ray scattering and found to influence significantly the macroscopic flow properties of these salts.
引用
收藏
页码：109 / 117
页数：9
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