Structure and interaction in pathway of charged nanoparticles aggregation in saline water as probed by scattering techniques

被引：16

作者：

Abbas, Sohrab ^{[1
]}

Yadav, Indresh ^{[1
]}

Kumar, Sugam ^{[1
]}

Aswal, Vinod K. ^{[1
]}

Kohlbrecher, Joachim ^{[2
]}

机构：

[1] Bhabha Atom Res Ctr, Solid State Phys Div, Bombay 400085, Maharashtra, India

[2] Paul Scherrer Inst, Lab Neutron Scattering, CH-5232 Villigen, Switzerland

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 675卷

关键词：

GOLD NANOPARTICLES; BEHAVIOR; SIZE;

D O I：

10.1016/j.cplett.2017.03.024

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：

The evolution of interaction and structure during the aggregation of anionic silica nanoparticles in saline water has been examined. The net attraction between charged nanoparticles with existing of salt ions is found to be significantly higher than that accounted by van der Waals force of the DLVO theory. The increase in the net attraction with salt leads to systematic transformation of nanoparticles into dimers, tetramers and higher-mers which finally results into fractal aggregate. Such multi-step aggregation is consistent with diffusion limited cluster aggregation (DLCA) fractal morphology but the fractal dimension (similar to 2.6) obtained is much larger than usually comprehended by DLCA. (c) 2017 Elsevier B.V. All rights reserved.

引用

页码：124 / 130

页数：7

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