Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-60412
Gu, L; Zheng, K; Zhou, Y; Li, J; Mo, X; Patzke, G; Chen, G (2011). Humidity sensors based on ZnO/TiO(2) core/shell nanorod arrays with enhanced sensitivity. Sensors and Actuators B: Chemical, 159(1):1-7.
View at publisher
Highly aligned arrays of ZnO/TiO(2) core/shell nanorods were fabricated on glass substrates by hydrothermal growth of ZnO nanorods cores followed by the deposition of anatase TiO(2) shells in a sol-gel process. The characterization of these composite materials with scanning electron microscopy (SEM), Raman spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and transmission emission microscopy (TEM) points to the formation of crystalline ZnO nanorod cores that are coated with anatase TiO(2) shells. Humidity sensors based on these core/shell nanorod arrays exhibit outstanding sensitivities with capacitances varying from 10(1) to 10(6) pF over a relative humidity (RH) range of 11%-95% at room temperature, which is 1.5 and 3 orders of magnitude higher than that of pristine TiO(2) films and ZnO nanorods, respectively. Complex impedance analysis indicated that the enhanced humidity sensitivity is probably due to the high surface/volume ratio of this core/shell material in combination with the remarkable hydrophilicity of the TiO(2) shell. (C) 2011 Elsevier B.V. All rights reserved.
258 downloads since deposited on 05 Mar 2012
67 downloads since 12 months
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Department of Chemistry|
|Dewey Decimal Classification:||540 Chemistry|
|Deposited On:||05 Mar 2012 12:17|
|Last Modified:||30 Nov 2013 13:28|
|Other Identification Number:||ISI:000295745900001|
Users (please log in): suggest update or correction for this item
Repository Staff Only: item control page