Platinum nanocluster growth on vertically aligned carbon nanofiber arrays: Sputtering experiments and molecular dynamics simulations

被引：8

作者：

Brault, Pascal ^{[1
]}

Caillard, Amael ^{[1
]}

Charles, Christine ^{[2
]}

Boswell, Rod W. ^{[2
]}

Graves, David B. ^{[3
]}

机构：

[1] Univ Orleans, CNRS, UMR7344, GREMI, F-45067 Orleans 2, France

[2] Australian Natl Univ, Res Sch Phys & Engn, Space Plasma Power & Prop Grp, Canberra, ACT 0200, Australia

[3] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

来源：

APPLIED SURFACE SCIENCE | 2012年 / 263卷

关键词：

Nanocluster growth; Carbon nanofibers; Sputtering deposition; PECVD; Molecular dynamics simulation; Sticking coefficient; NANOTUBE ARRAYS; ULTRATHIN FILMS; DEPOSITION; CLUSTERS; ADSORPTION; RH(111); SURFACE; OXYGEN;

D O I：

10.1016/j.apsusc.2012.09.059

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：

Sputtered platinum nanocluster growth on previously plasma enhanced chemical vapor deposition PECVD - grown vertically aligned carbon nanofiber arrays is presented. Experimental cluster size distribution is shown to decrease from the CNF top to bottom, as observed by transmission electron microscopy. Molecular dynamics simulations are carried out for understanding early stages of Pt growth on model CNF arrays. Especially, sticking coefficients, concentration profiles along CNF wall, cluster size distributions are calculated. Simulated cluster size distribution are consistent with experimental finding. Sticking coefficient decreases against deposition time. The shape of the sticking curve reflects the nanocluster growth process. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：352 / 356

页数：5

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