EX SITUATOMIC FORCE MICROSCOPY STUDIES OF SURFACE MORPHOLOGY ON {001} FACES OF MMTWD CRYSTALS

X. J. Liu (), X. Q. Wang, Z. Y. Wang, D. Xu (), G. W. Yu, Y. Y. Song, Y. L. Geng and H. B. Zhang
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X. J. Liu: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
X. Q. Wang: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
Z. Y. Wang: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
D. Xu: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
G. W. Yu: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
Y. Y. Song: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
Y. L. Geng: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China
H. B. Zhang: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Ji'nan 250100, P. R. China

Surface Review and Letters (SRL), 2006, vol. 13, issue 05, 607-611

Abstract: Surface morphology of the {001} faces of MMTWD crystals grown from by the temperature-lowering method has been studied. Monolayer and multilayer steps elongate along theadirection, which is determined by the crystal structure. Apart from that, the elementary steps have narrower terraces than the bunched ones, which may be resulting from the faster growth rates of the former than the latter. The formation of the protuberances at the step fronts is primarily associated with the uneven growth rates. The hollow cavities also elongate along theadirection, which demonstrates that the formation of them is also restricted by the crystal structure. Cracks are supposed to occur during harvesting, handling, or temperature stress afterwards. Growth of the 3D hillocks in high density can probably cause large stress and induce structure mismatch and serious cracks at the later stage.

Keywords: Atomic force microscopy (AFM); surface morphology; nonlinear optical materials (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06008566

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