THERMAL PROCESSING OF BUNDLED TUNGSTEN OXIDE NANOWIRES

摘要：

Taking the wide band gap one-dimensional (1-D) tungsten oxide nanowires as an example, we here demonstrate systematically the physical characteristics of thermally processed nanowires at temperatures ranging from 400℃ to 1000℃, for the first time. Accompanied by a significant drop of specific surface area from 151 m2/g for the as-prepared nanowires to 109 m2/g and 66 m2/g subject to annealing at 400℃ and 450℃, dramatically morphology evolution and phase transformation have also been observed. The nanostructured bundles became straighter, larger in diameters and shorter in length, and eventually became irregular particles with size up to 5 μm. The Brunauer-Emmett-Tettler (BET) result suggests that 400℃ can be considered as a top temperature limit in nanodevice design where high surface area is important, e.g. in gas sensors. A protocol for thermally processing of these bundled tungsten nanowires has been established.

关键词： Tungsten ozide nanowires thermal processing bundles

作者: SHIBIN SUN YIMIN ZHAO YONGDE XIA ZENGDA ZOU GUANGHUI MIN YANQIU ZHU

作者单位: Nanotubes Laboratory, Advanced Materials Research Croup, School of Mechanical, Materials and Manufac Nanotubes Laboratory, Advanced Materials Research Croup, School of Mechanical, Materials and Manufac School of Materials Science and Engineering, Shandong University, Shandong, Jinan 250061, China

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 1541-1547

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）