Viyapol Pattantsetakul

Transparent conductive nanocolumnar AZO film coating by glancing angle deposition technique

In this work, we deposited nanocolumnar aluminum doped zinc oxide (AZO) film by glancing angle deposition (GLAD) to produce transparent conductive oxide (TCO) film with omnidirectional antireflecti...

Omnidirectional antireflection and electrochromic properties of WO3 nanorods prepared by oblique angle deposition

In this study, the electrochromic tungsten oxide (WO3) nanorods were successfully prepared by reactive dc magnetron sputtering with oblique angle deposition (OAD) technique on silicon (100) wafer, glass slide and ITO coated glass substrates. The influence of sputtering power on the WO3 nanorods were investigated by grazing incident X-ray diffractometer, field emission scanning electron microscope and spectrophotometer. The thickness of the WO3 nanorods layer was controlled at 400 nm by adjusting the deposition time in order to optimize the electrochromic property. These WO3 nanorods had an amorphous and high transmittance with omnidirectional antireflection property. In addition, the prepared electrochromic WO3 nanorods sample were also shown high optical contrast which demonstrated considerable potential in the smart window application.In this study, the electrochromic tungsten oxide (WO3) nanorods were successfully prepared by reactive dc magnetron sputtering with oblique angle deposition (OAD) technique on silicon (100) wafer, glass slide and ITO coated glass substrates. The influence of sputtering power on the WO3 nanorods were investigated by grazing incident X-ray diffractometer, field emission scanning electron microscope and spectrophotometer. The thickness of the WO3 nanorods layer was controlled at 400 nm by adjusting the deposition time in order to optimize the electrochromic property. These WO3 nanorods had an amorphous and high transmittance with omnidirectional antireflection property. In addition, the prepared electrochromic WO3 nanorods sample were also shown high optical contrast which demonstrated considerable potential in the smart window application.

Influence of Growth Conditions on Morphology of ZnO Nanorods by Low-Temperature Hydrothermal Method

Zinc oxide (ZnO) nanorods (NRs) promise high potentials in several applications, such as photovoltaic device, thermoelectric device, sensor and solar cell. In this research, the vertical alignment of ZnO NRs was fabricated by hydrothermal method with various precursor concentrations and growth time on different seed layers (ZnO and Au), which deposited on silicon wafer substrate (100). The crystalline structure and morphology of ZnO NRs have been characterized by x-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) techniques, respectively. The x-ray diffraction pattern shows that the prepared samples have a strong preferred orientation (002) plane. FE-SEM images of the ZnO NRs, it found that the density and aspect ratio were strongly influenced by the seed layer and precursor concentration. In addition, the aspect ratio of ZnO NRs was increased with increasing growth time. This study provides a cost effective method for the fabrication of well aligned ZnO NRs for nano-electronic devices.