期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 184, 期 -, 页码 118-129出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.03.135
关键词
Niobium oxide; Tungsten oxide; Nanorods; Hydrogen; Methane; Sensor
资金
- Ministry of Sciences and Technology of China through 973-Project (MOST) [2009CB939904]
- University Development Fund (Nanotechnology Research Institute) of The University of Hong Kong [00600009]
- Australian Government
An investigation on hydrogen and methane sensing performance of hydrothermally formed niobium tungsten oxide nanorods employed in a Schottky diode structure is presented herein. By implementing tungsten into the surface of the niobium lattice, we create Nb5+ and W5+ oxide states and an abundant number of surface traps, which can collect and hold the adsorbate charge to reinforce a greater bending of the energy bands at the metal/oxide interface. We show experimentally, that extremely large voltage shifts can be achieved by these nanorods under exposure to gas at both room and high temperatures and attribute this to the strong accumulation of the dipolar charges at the interface via the surface traps. Thus, our results demonstrate that niobium tungsten oxide nanorods can be implemented for gas sensing applications, showing ultra-high sensitivities. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据