Effect of Surfactant Concentration and Aggregation on the Growth Kinetics of Nickel Nanoparticles

被引：78

作者：

LaGrow, Alec P. ^{[1
]}

Ingham, Bridget ^{[1
,2
]}

Toney, Michael F. ^{[3
]}

Tilley, Richard D. ^{[1
]}

机构：

[1] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6140, New Zealand

[2] Callaghan Innovat Res Ltd, Lower Hutt 5040, New Zealand

[3] Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 32期

关键词：

BRANCHED PALLADIUM NANOSTRUCTURES; METAL NANOCLUSTER FORMATION; SHAPE-CONTROLLED SYNTHESIS; CDSE NANOCRYSTALS; MONODISPERSE NANOPARTICLES; PYRROLE HYDROGENATION; MAGNETIC-PROPERTIES; CATALYTIC-ACTIVITY; GOLD NANOCRYSTALS; AMMONIA-BORANE;

D O I：

10.1021/jp405314g

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 effect of trioctylphosphine (TOP) concentration on the growth of nickel nanoparticles is studied using in situ synchrotron small-angle X-ray scattering. The growth kinetics are fitted using a two-step nucleation and autocatalytic growth model. TOP acts as a nucleating agent and then acts as an inhibitor against rapid particle growth. Increasing the TOP concentration results in smaller nanoparticles. Once there is a critical concentration of nickel particles above a certain size, they start to aggregate. This results in a broadening of the particle size distribution at later times due to particles on the outside of the aggregates continuing to grow, while those on the inside cease to grow as the nickel precursor is locally depleted.

引用

页码：16709 / 16718

页数：10

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