| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5423140 | Surface Science | 2010 | 6 Pages |
Abstract
A comparative study of the morphological surface evolution of c-plane (0001) α-Al2O3 upon annealing was investigated for non-miscut (i.e. substrates with 0° nominal miscut) and vicinal substrates. The samples were annealed in air at 1100 °C for different durations of time. Although non-miscut samples do not show any step bunching at this temperature, miscut substrates show a regular and ordered stepped morphology with clearly defined terraces as revealed by Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM) image analysis. The surface morphology presents a number of coalescence points, i.e. locations where two steps merge and form a multiple step. Close to the coalescence points, parallel steps change direction to different low index direction.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
F. Cuccureddu, S. Murphy, I.V. Shvets, M. Porcu, H.W. Zandbergen, N.S. Sidorov, S.I. Bozhko,