Noncontact-Mode Atomic Force Microscopy Observation of α-Al2O3(0001) Surface
- 1 June 2000
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 39 (6S)
- https://doi.org/10.1143/jjap.39.3773
Abstract
Single-crystalline α-Al2O3(0001) surfaces were investigated by low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS) and noncontact-mode atomic force microscopy (NC-AFM). When the α-Al2O3(0001) surface was annealed in air at 1273 K, terraces of ∼80 nm width and steps of ∼0.2 nm height appeared. NC-AFM topography revealed, however, that the terraces were not atomically flat. Several previously reported methods for preparing (1×1) α-Al2O3(0001) surfaces were examined. However, the cleaning procedures used in these methods were not sufficient to prepare atomically flat (1×1) α-Al2O3(0001) surfaces; the surfaces thus prepared exhibited a topography which was much more ragged than that of an as-received surface.Keywords
This publication has 12 references indexed in Scilit:
- Distance dependence of noncontact-AFM image contrast on Si(111) × –Ag structureApplied Surface Science, 1999
- Imaging of individual formate ions adsorbed on TiO2(110) surface by non-contact atomic force microscopyChemical Physics Letters, 1997
- Topmost surface analysis of SrTiO3 (001) by coaxial impact-collision ion scattering spectroscopyApplied Physics Letters, 1994
- Atomic Control of the SrTiO 3 Crystal SurfaceScience, 1994
- High-power InGaN/GaN double-heterostructure violet light emitting diodesApplied Physics Letters, 1993
- A reflection electron microscopic (REM) study of α-Al2O3(0001) surfacesSurface Science, 1991
- Electronic Structure and Chemical Reactions at Metal–Alumina and Metal–Aluminum Nitride InterfacesJournal of the American Ceramic Society, 1991
- Surface facetting and polarity of aluminaUltramicroscopy, 1987
- Composition and surface structure of the (0001) face of .alpha.-alumina by low-energy electron diffractionThe Journal of Physical Chemistry, 1970
- LOW-ENERGY ELECTRON DIFFRACTION OBSERVATIONS OF α-ALUMINAApplied Physics Letters, 1967