Zinc oxide, ZnO are semiconductor in group II-IV and are really popular nowadays due to high direct bandgap (3.37eV), low toxicity, can withstand high temperature, large exciting binding energy (60meV) and many types of structural properties. Recently, there are many researchers used ZnO nanostructure to invent many sensors such as humidity sensor and gas sensor due to its high sensitivity towards environment. There are a lot of techniques to fabricate the Zno nanostructure. For instance, Pulsed Layer Deposition (PLD), Chemical Vapour Deposition (CVD), Hydrothermal, Sputtering and Sol-Gel. But, among all the technique, hydrothermal technique are the most common techniques used due to simple and produce high quality of ZnO thin films with very low cost, low temperature and low time consumption. In this project, the ZnO thin film were deposited on glass substrate using hydrothermal technique with gold that act as catalyst in a temperature of between 50°C until 90°C. Other aspect also being observed in this project such as time taken for fabrication and the thickness of gold catalyst and the results are reported in this thesis. X-Ray Diffraction (XRD) is used to determine the purity of the ZnO nanostructure by observing the presence of ZnO layer with high peak of crystal orientation and used of Energy-Dispersive X-Ray Spectroscopy (EDX) for recording the element composition. Furthermore, the used of Field Emission Scanning Electron Microscopy (FESEM) for the study of ZnO morphology or shape and Surface Profiler to determine the thickness of ZnO nanowire on the glass substrate. The glass substrate that contain ZnO nanowire then load into PCB and mounted with silver electrode. The used of 2-probe method for the determination of electrical properties of ZnO nanowire on the glass substrate. The main focus is the resistance and resistivity of the ZnO nanowire under the different temperature. The experimental shows positive result as the resistance are linearly to the temperature. The resistance will decrease as the temperature increase with the range of 120ºC to 300°C.
