Tungsten Oxide Urchin-Flowers and Nanobundles: Effect of Synthesis Conditions and Heat Treatment on Assembly and Gas-Sensing Characteristics

被引：8
作者：
Pham Van Tong [1 ]
Nguyen Duc Hoa [1 ]
Do Dang Trung [1 ]
Nguyen Duc Quang [1 ]
Nguyen Van Hieu [1 ]
机构：
[1] Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, Hanoi, Vietnam
来源：
SCIENCE OF ADVANCED MATERIALS | 2014年 / 6卷 / 06期
关键词：
Tungsten Oxide; Nanowires; Assembly; Gas Sensors; WO3; SENSOR; NANOWIRES; FABRICATION; PARTICLES; TEMPLATE; FILMS;
D O I：
10.1166/sam.2014.1854
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The synthesis and assembly of tungsten oxide nanowires into building blocks are important for nanodevices, such as electrochromic, bio, and gas sensors. In this study, tungsten oxide nanowires with different assembly morphologies of nanobundles and urchin-flowers are synthesized by the wet chemical solvothermal method. The assembly, crystal structure, and specific surface area of the synthesized materials are characterized byusing field-emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and nitrogen adsorption/desorption isotherm. The effects of the assembly on the ammonia gas-sensing characteristics of tungsten oxide nanowires are systematically investigated from 350 degrees C to 450 degrees C. Results show that the assembly morphologies of the tungsten oxide nanowires markedly influence the gas-sensing performance of devices. The relationships of gas-sensing characteristics with the diameter, porous structure, and specific surface area of the synthesized materials are also discussed.
引用
收藏
页码：1081 / 1090
页数：10
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