Polyol Synthesis of Silver Nanowires by Heterogeneous Nucleation; Mechanistic Aspects Influencing Nanowire Diameter and Length

被引:50
作者
Schuette, Waynie M. [1 ]
Buhro, William E. [1 ]
机构
[1] Washington Univ, Dept Chem, St Louis, MO 63130 USA
基金
美国国家科学基金会;
关键词
SEMICONDUCTOR NANOWIRES; GROWTH; CHLORIDE; TRANSPARENT; PARTICLES;
D O I
10.1021/cm502827b
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 growth of silver nanowires via polyol synthesis is studied by employing AgCl nanocubes of varying size as the heterogeneous nucleants. The final mean silver nanowire diameter is found to be independent of the size of the heterogeneous nucleant, showing that the diameter is not significantly influenced by the nucleation event. Kinetic studies determine that nanowire diameter, length, and aspect ratio grow in parallel to one another and with the extent of the Ag+ reduction reaction, demonstrating that growth is limited by the reduction rate. The results are interpreted to support nanowire growth by a surface-catalyzed reduction process occurring on all nanowire surfaces and to exclude nanoparticle aggregation or Ostwald ripening as a primary components of the growth mechanism.
引用
收藏
页码:6410 / 6417
页数:8
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