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Nanostructured mesoporous materials are widely used for many practical applications due to their large, controllable pore size, and high surface area. With its large specific surface area for more reactive sites and narrow pore size distribution, mesoporous tungsten oxide used as a semiconducting ceramic material is now attracting attention in various applications, such as gas sensing, electrochromic...
All oxide-based, nano-transparent p-n heterojunction device consisting of p-NiO and n-ZnO thin films was fabricated by r.f. sputtering method. The structural and electric properties of the p-NiO/n-ZnO heterojunction were characterized by X-ray diffraction (XRD), UV-visible spectroscopy, Hall measurement, and photocurrent measurements. The XRD shows that ZnO films are highly crystalline in nature with...
In this study, imprinting condition of 180degC for 20 minutes is used to fabricate patterned polyimide (PI) films. Results provides a simple approach to fabricate patterns without residual layer due to the dewetting behavior between the poly-amic acid (PAA) solution and imprint stamp.
Gold nanoparticles (Au NPs) have been attracting more attention because they have many color varieties in the visible region based on plasmon resonance, which is due to the collective oscillation of the electrons at the surface of the nanoparticles. We prepared 6 nm Au NPs to modify the surface of the glass substrate. Surface plasmons resonance of Au NPs in toluene is between 500 nm and 600 nm. When...
The ZnO:Al thin films were prepared by RF magnetron sputtering on Si substrate using Pt as interdigitated electrodes. The structure was characterized by XRD and SEM analyses, and the ethanol vapor gas sensing as well as electrical properties have been investigated and discussed. The gas sensing results show that the sensitivity for detecting 400 ppm ethanol vapor was ~20 at an operating temperature...
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