期刊
NANOTECHNOLOGY
卷 22, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/22/8/085502
关键词
-
资金
- Ministry of Education, Science and Technology (MEST) [2010-0019180, 2010-0018932, R32-2008-000-10082-0, R01-2008-000-20185-0, R-31-2008-000-10055-0, 2009-0083380, R0A-2008-000-20032-0]
- MKE/IITA [2008-5024-01]
- Ministry of Education, Science & Technology (MoST), Republic of Korea [N01110018] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [R31-2011-000-10055-0, 2008-0062071, 과C6A1602, 2010-50174, 2005-2002369, R01-2008-000-20185-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We have successfully demonstrated a ZnO nanorod-based 3D nanostructure to show a high sensitivity and very fast response/recovery to hydrogen gas. ZnO nanorods have been synthesized selectively over the pre-defined area at relatively low temperature using a simple self-catalytic solution process assisted by a lithographic method. The conductance of the ZnO nanorod device varies significantly as the concentration of the hydrogen is changed without any additive metal catalyst, revealing a high sensitivity to hydrogen gas. Its superior performance can be explained by the porous structure of its three-dimensional network and the enhanced surface reaction of the hydrogen molecules with the oxygen defects resulting from a high surface-to-volume ratio. It was found that the change of conductance follows a power law depending on the hydrogen concentration. A Langmuir isotherm following an ideal power law and a cross-over behavior of the activation energy with respect to hydrogen concentration were observed. This is a very novel and intriguing phenomenon on nanostructured materials, which suggests competitive surface reactions in ZnO nanorod gas sensors. S Online supplementary data available from stacks. iop.org/Nano/22/085502/mmedia
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