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- W3186165839 abstract "This research is carried out to deposit and characterizes nanostructured Zinc Oxide (ZnO) thin film by radio frequency (RF) magnetron sputtering method for ammonia (NH3 ) gas sensor application. The sensitivity of sensor is mainly depends on the surface reaction effect which strongly depends on the grain size or the surface to volume ratio of the active materials used. Therefore to achieve a highly sensitive NH3 sensor that works at room temperature, nanostructured ZnO thin films were deposited. Two types of substrate materials namely glass and thermally oxidized p-type silicon (SiO2 /Si) were investigated to determine which substrate material is more suitable for NH3 gas sensor application. The selection of the substrate materials is based on the structural and electrical properties as well as the response of ZnO thin films under the exposure of NH3 gas. This study suggested that Si0 2 /Si is the most suitable substrate for NH3 gas sensor application since it produced smaller ZnO grain size and exhibit the change in resistance when exposed to NH3 gas. In order to obtain the high sensitivity NH3 gas sensor, the study on the effect of RF magnetron sputtering parameters to the properties of ZnO was performed. The parameters that have been studied were the substrate temperature and the oxygen flow rate. This part of study recommended that the deposition at room temperature with 40 seem oxygen flow rate gave the lowest grain size (16.62 nm) which in turns reveals the highest sensitivity (94%) towards NH3 gas." @default.
- W3186165839 created "2021-08-02" @default.
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- W3186165839 date "2007-01-01" @default.
- W3186165839 modified "2023-09-23" @default.
- W3186165839 title "Study on the performance enhancement mechanism of the mosfet device based on Si/SiGe strained silicon / Hashimah Hashim and Ahmad Sabirin Zoolfakar" @default.
- W3186165839 hasPublicationYear "2007" @default.
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