title: Cathodoluminescence study of one-dimensional free-standing widegap-semiconductor nanostructures: GaN nanotubes, Si3N4 nanobelts and ZnS/Si nanowires.
abstract: Luminescence properties of one-dimensional free-standing widegap-semiconductor nanostructures were characterized by means of cathodoluminescence (CL). GaN nanopipes, alpha-Si3N4 nanobelts and ZnS/Si nanowires were fabricated by a catalyst-free method, namely grown in an induction furnace from powders. After the observation of morphology by scanning electron microscopy as well as the confirmation of their crystal structures by transmission electron microscopy, their CL spectra and images were observed. The CL spectra mapping as well as the monochromatic CL imaging revealed the variation of the luminescence spectra of different nanowires as well as that along a single wire. These results revealed the optical features of nanostructures.
authors.affiliation: Nanomaterials Laboratory, National Institute for Materials Science, Sengen 1-2-1, Tsukuba 305-0047, Japan. Sekiguchi.takashi@nims.go.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Sekiguchi
authors.forename: Junqing
authors.initials: J
authors.lastname: Hu
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Bando