Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 140, Issue 1, Pages 185-189Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.04.011
Keywords
Heteronanostructures; Sensor; alpha-Fe2O3; ZnO; Ethanol sensing characteristics
Funding
- National Natural Science Foundation of China [50772025]
- Natural Science Foundation of Heilongjiang Province, China [F200828, E200839]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20070217002]
- China Postdoctoral Science Foundation [20060400042, 200801044]
- Innovation Foundation of Harbin City [RC2006QN017016]
Ask authors/readers for more resources
alpha-Fe2O3/ZnO heteronanostructures were synthesized via a three-step process. XRD, SEM, TEM and EDS analyses indicated that their diameters and lengths were similar to 40 nm and 0.35-1.2 mu m, respectively, in which the largest thickness of ZnO shells was about 10 nm. The heteronanostructures exhibited a dramatic improvement in ethanol sensing characteristics compared to the pure alpha-Fe2O3 nanorods. Based on the space-charge layer model, such enhanced sensing properties were attributed to small thickness of ZnO shell. Our results demonstrate that One-dimensional (1D) metal oxide heteronanostructures, whose shell thickness is comparable to Debye length, are very promising materials for fabricating gas sensors with good performances. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available