Pulsed laser deposition of ZnO thin films decorated with Au and Pd nanoparticles with enhanced acetone sensing performance

被引:29
作者
Alexiadou, M. [1 ]
Kandyla, M. [1 ]
Mousdis, G. [1 ]
Kompitsas, M. [1 ]
机构
[1] Natl Hellen Res Fdn, Theoret & Phys Chem Inst, 48 Vasileos Constantinou Ave, Athens 11635, Greece
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2017年 / 123卷 / 04期
关键词
FLOWER-LIKE ZNO; GEL GROWN NIO; GAS SENSORS; TEMPERATURE; NANOBELTS; PROPERTY; NANORODS;
D O I
10.1007/s00339-017-0900-y
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We fabricate and compare nanocomposite thin-film ZnO chemoresistive acetone sensors with gold or palladium nanoparticles on the surface, at low operating temperatures. The sensors are fabricated by pulsed laser deposition and operate in the temperature range 159200 degrees C. The ZnO films are polycrystalline, crystallizing mainly at the (002) and (101) orientations of the hexagonal phase. The nanocomposite ZnO:Au and ZnO:Pd sensors have a lower detection limit and show a response enhancement factor between 2 and 7, compared with pure ZnO sensors. The ZnO: Pd sensor performs better than the ZnO: Au sensor. The ZnO: Pd sensor sensitivity increases with the amount of palladium on the surface, while it remains roughly unchanged with the ZnO thickness. The lowest acetone concentration we detect is 26 ppm for the operating temperature of 200 degrees C.
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页数:6
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