Type

Journal Article

Authors

G. Behan
Sumesh Sofin
Ruggero Verre
Victor Usov
Hongzhou Zhang
Karsten Fleischer
Igor Shvets
Daniel Fox

Subjects

Physics

Topics
faceting surface al2o3 sapphire formation annealing transformation equilibrium state

Equilibrium faceting formation in vicinal Al2O3 (0001) surface caused by annealing (2012)

Abstract We report on a heat-induced transformation of the surface of ?-alumina (0001) crystals which have an off-cut in the [1-210] direction. Annealing the crystal causes the surface to transform into a regular array of (0001) and (1-216) facets. The resultant faceted morphology represents the equilibrium state of the system. It is demonstrated that the average terrace periodicity is determined by the annealing temperature. Possible causes for the surface rearrangement are also discussed. This method could be used for producing templates with controlled periodicity for growth of nanostructure arrays.
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Full list of authors on original publication

G. Behan, Sumesh Sofin, Ruggero Verre, Victor Usov, Hongzhou Zhang, Karsten Fleischer, Igor Shvets, Daniel Fox

Experts in our system

1
Hongzhou Zhang
Trinity College Dublin
Total Publications: 50
 
2
Karsten Fleischer
Trinity College Dublin
Total Publications: 51
 
3
Igor Shvets
Trinity College Dublin
Total Publications: 202
 
4
Daniel Fox
Trinity College Dublin
Total Publications: 15