Controllable synthesis and tunable field-emission properties of tungsten oxide sub-micro fibers

详细信息	查看全文 | 推荐本文 |

• 作者：Xinli Liu ; Yuehui He ; ^{yuehui@mail.csu.edu.cn} ; Shiliang Wang ; Quan Zhang ; Min Song
• 关键词：Tungsten oxide ; Sub-micro fiber arrays ; Vapor deposition ; Field emission properties
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2012
• 期刊代码：91_02634368
• 类别：et
• 出版时间：September, 2012
• 卷：34
• 期：Complete
• 页码：47-52
• 文件大小：1229 K

摘要

A large amount of tungsten oxide (W₁₈O₄₉) sub-micro fiber arrays was prepared via a novel method on tungsten substrates, using tungsten trioxide powders as the source. Different growth densities and diameters of W₁₈O₄₉ sub-micro fibers were obtained when synthesized temperature was changed from 800 掳C to 950 掳C. The morphology and structure of the tungsten oxide sub-micro fibers were characterized by SEM, X-ray diffraction, and TEM. The average length of the resultant tungsten oxide sub-micro fibers is more than 5 渭m, and their diameters are about several hundred nanometers. The synthesized fibers have a single-crystalline monoclinic structure with the growth direction of [010] and their growth mechanisms are discussed. Also, the relationships between the sub-micro fibers' field emission properties and their diameters and growth densities are investigated.