Enhanced ethanol sensing properties based on SnO2 nanowires coated with Fe2O3 nanoparticles.
In: Sensors & Actuators B: Chemical, Jg. 238 (2017), S. 871-879
academicJournal
Zugriff:
SnO 2 nanowires were synthesized and then coated with Fe 2 O 3 nanoparticles by a 3-step process. The SnO 2 nanowires and Fe 2 O 3 nanoparticles were synthesized by the VLS and hydrothermal methods, respectively. Using these two different materials, Fe 2 O 3 nanoparticles were coated on the surface of the SnO 2 nanowires by spin coating and thermal annealing. The gas sensing properties and sensing mechanisms of both types of sensors were examined. The sensitivities of the Fe 2 O 3 nanoparticle-coated SnO 2 sensors to ethanol gas were 1.48–7.54 times higher according to the ethanol concentration at 300 °C than those of the as-synthesized SnO 2 nanowires. The enhanced ethanol sensing mechanisms of this sensor can be explained by the surface depletion region and potential energy barrier at the grain boundaries. [ABSTRACT FROM AUTHOR]
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Enhanced ethanol sensing properties based on SnO2 nanowires coated with Fe2O3 nanoparticles.
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Autor/in / Beteiligte Person: | Choi, Kyo Sang ; Park, Sunghoon ; Chang, Sung-Pil |
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Zeitschrift: | Sensors & Actuators B: Chemical, Jg. 238 (2017), S. 871-879 |
Veröffentlichung: | 2017 |
Medientyp: | academicJournal |
ISSN: | 0925-4005 (print) |
DOI: | 10.1016/j.snb.2016.07.146 |
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