Growth of Pt Nanowires by Atomic Layer Deposition on Highly Ordered Pyrolytic Graphite

被引：87
|
作者：
Lee, Han-Bo-Ram [1 ]
Baeck, Sung Hyeon [1 ,2 ]
Jaramillo, Thomas F. [1 ]
Bent, Stacey F. [1 ]
机构：
[1] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA
[2] Inha Univ, Sch Chem Engn, Inchon 402751, South Korea
来源：
NANO LETTERS | 2013年 / 13卷 / 02期
关键词：
Atomic layer deposition; Pt; nanowires; highly ordered pyrolytic graphite; nucleation; graphene; PLATINUM NANOPARTICLES; CATALYTIC-OXIDATION; CARBON NANOTUBES; METAL NANOWIRES; GRAPHENE; ARRAYS; PERFORMANCE; NUCLEATION; ELECTRODES; TEMPLATES;
D O I：
10.1021/nl303803p
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The formation of Pt nanowires (NWs) by atomic layer deposition on highly ordered pyrolytic graphite (HOPG) is investigated. Pt is deposited only at the step edges of HOPG and not on the basal planes, leading to the formation of laterally aligned Pt NWs. A growth model involving a morphological transition from 0-D to 1-D structures via coalescence is presented. The width of the NWs grows at a rate greater than twice the vertical growth rate. This asymmetry is ascribed to the wetting properties of Pt on HOPG as influenced by the formation of graphene oxide. A difference in Pt growth kinetics based on crystallographic orientation may also contribute.
引用
收藏
页码：457 / 463
页数：7
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