Growth of palladium nanoparticles: An experimental and numerical study

被引：13

作者：

Agarwal, Vinay ^{[1
]}

Aruna, I. ^{[1
]}

Banerjee, Varsha ^{[1
]}

Mehta, B. R. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, New Delhi 110016, India

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 03期

关键词：

MEDIATED ISLAND GROWTH; PHASE-TRANSITION; DIFFUSION; AGGREGATION; CLUSTERS; KINETICS; MODEL; DEPOSITION; ADSORPTION; ENERGY;

D O I：

10.1103/PhysRevB.74.035412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effect of varying deposition time and temperature on the formation of palladium nanoparticles in an attempt to identify microscopic process which contribute towards their evolution. Computer simulations of a stochastic lattice model with the basic mechanisms of adsorption, diffusion and irreversible aggregation have been performed to mimic the underlying mechanism of particle growth. We propose a mass and temperature dependent diffusion term of the form D(m,T)proportional to D-0(T)m(-gamma) in order to obtain qualitative agreement with experimental data. The possibility of tuning deposition time, temperature and flux to obtain narrow particle size distributions has been explored. Wherever pertinent, simple analytical arguments have been presented.

引用

页数：8

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