How Nanoparticles Coalesce: An in Situ Study of Au Nanoparticle Aggregation and Grain Growth

被引：177

作者：

Ingham, Bridget ^{[1
,2
]}

Lim, Teck H. ^{[3
]}

Dotzler, Christian J. ^{[1
,4
]}

Henning, Anna ^{[3
]}

Toney, Michael F. ^{[4
]}

Tilley, Richard D. ^{[2
,3
]}

机构：

[1] Ind Res Ltd, Lower Hutt 5040, New Zealand

[2] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6040, New Zealand

[3] Victoria Univ Wellington, Sch Chem & Phys Sci, Wellington 6040, New Zealand

[4] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

来源：

CHEMISTRY OF MATERIALS | 2011年 / 23卷 / 14期

关键词：

nanoparticles; coalescence; grain growth; X-ray diffraction; small-angle X-ray scattering; STABILIZED GOLD NANOPARTICLES; SCATTERING; SIZE; RESISTIVITY; TRANSITION; DYNAMICS; DISORDER; BEHAVIOR; MODEL; FILMS;

D O I：

10.1021/cm200354d

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 processes of aggregation and subsequent grain growth of highly twinned, surfactant stabilized gold nanoparticles have been followed in real time using synchrotron X-ray diffraction (XRD) and small-angle X-ray scattering (SAXS). This gives insight into the overall coalescence mechanism of metal nanocrystals. First, the capping ligands melt or desorb, which enables the nanocrystals to aggregate and join together. At longer times, grain growth is observed, and the stacking fault densities decrease. The time scale of the grain growth process is significantly longer than that of the particle aggregation. We contrast the behavior we observe to that of other nanoparticles and discuss the implications of our results on device fabrication.

引用

页码：3312 / 3317

页数：6

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