水在单壁碳纳米管毡超生长中的作用。

Role of water in super growth of single-walled carbon nanotube carpets.

作者信息

Amama Placidus B, Pint Cary L, McJilton Laura, Kim Seung Min, Stach Eric A, Murray P Terry, Hauge Robert H, Maruyama Benji

机构信息

Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright-Patterson Air Force Base, Ohio 45433, USA.

出版信息

Nano Lett. 2009 Jan;9(1):44-9. doi: 10.1021/nl801876h.

DOI:10.1021/nl801876h

PMID:19046079

Abstract

The Ostwald ripening behavior of Fe catalyst films deposited on thin alumina supporting layers is demonstrated as a function of thermal annealing in H2 and H2/H2O. The addition of H2O in super growth of single-walled carbon nanotube carpets is observed to inhibit Ostwald ripening due to the ability of oxygen and hydroxyl species to reduce diffusion rates of catalyst atoms. This work shows the impact of typical carpet growth environments on catalyst film evolution and the role Ostwald ripening may play in the termination of carpet growth.

摘要

沉积在薄氧化铝支撑层上的铁催化剂薄膜的奥斯特瓦尔德熟化行为被证明是氢气和氢气/水热退火的函数。观察到在单壁碳纳米管地毯的超生长中添加水可抑制奥斯特瓦尔德熟化，这是由于氧和羟基物种能够降低催化剂原子的扩散速率。这项工作展示了典型的地毯生长环境对催化剂薄膜演变的影响以及奥斯特瓦尔德熟化在地毯生长终止中可能发挥的作用。