Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/47623
Title: SYNTHESIS OF ZINC OXIDE FILMS AND NANOWIRES FOR NANOELECTRONICS APPLICATIONS
Authors: ONG WEI LI
Keywords: Zinc oxide, nanowires, films, field emission, gas sensing, p-type
Issue Date: 27-Jun-2012
Source: ONG WEI LI (2012-06-27). SYNTHESIS OF ZINC OXIDE FILMS AND NANOWIRES FOR NANOELECTRONICS APPLICATIONS. ScholarBank@NUS Repository.
Abstract: ZnO films and nanowires were grown on rigid (Si and c-sapphire) and flexible (polyethylene terephthalate (PET)) substrates via the low temperature hydrothermal method. The effects of growth parameters such as growth duration, concentration of precursors and use of surfactants were investigated. Ammonia plasma treatment was then applied to the films and nanowires to modify the electrical properties towards stable p-type conductivity. The gas sensing properties of ZnO nanowires synthesized on PET substrates were studied and enhancement to the sensing performance was demonstrated. The flexible gas sensors proved to be robust and showed little deterioration in the sensing performance even in the bent state. Field emission (FE) properties of ZnO nanowires grown on PET substrates were also studied and the dependence of the FE performance on the aspect ratio and emitter density of the nanowires were investigated. The feasibility and robustness of the flexible field emitters were also demonstrated.
URI: http://scholarbank.nus.edu.sg/handle/10635/47623
Appears in Collections:Ph.D Theses (Open)

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