Papers by Keyword: CVD Technique

Abstract: Uniform growth of WO3 with macroscopic structures was successfully achieved by using carbon nanofibers (CNFs) as template. Field emission scanning electron microscopy (FE-SEM), coupled with X-ray diffraction (XRD) analysis confirmed the template effect and the existence of WO3 immobilized on the macroscopic silica fiber.

Abstract: The growth of carbon nanofibers (CNFs) with ordered macroscopic structures could be achieved by CVD technique. Silica fiber, alumina fiber, and AAO membrane were selected as the typical ordered macroscopic substrates for CNFs growth. It turned out that silica fiber could act as the promising and effective substrate for CNFs growth on its surface. While alumina fiber and AAO membrane could also be expected to act as the potential substrates for CNFs growth on their surface.

Abstract: Vertically aligned multiwall carbon nanotubes were directly grown by means of thermal Chemical Vapor Deposition onto epitaxial and bulk double side polished 4H-SiC substrates. Their structure and morphology have been examined through Field Emission Scanning Electron Microscopy and Raman spectroscopy. The results have been compared with CNTs carpets grown in the same conditions on Si substrates. Preliminary analysis of their electrical properties has been performed using the four-point probe technique in order to evaluate their resistivity.