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Atomic force microscopy studies of ZnSe self-organized dots fabricated on ZnS/GaP (1998)

Ma, Z. H. ; Sun, W. D. ; Sou, I. K. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 73 (1998), S. 1340-1342

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: ZnSe self-organized dot structures on ZnS thin films were fabricated by the molecular beam epitaxy technique. In situ reflection high-energy electron diffraction studies reveal that growth interruption is required for the formation of the dot structure. Atomic force microscopy (AFM) images of the dots taken within the same day of growth reveal that the dot density increases with increasing ZnSe coverage. A density of 18 μm−2 was achieved with a coverage of 8.0 ZnSe monolayers. AFM images taken at later times (up to six months later) show ripening effects. The average dot size measured at various times after growth is consistent with the prediction of the Ostwald ripening model with a growth time constant of 4±1 days for the structure with a coverage of 8.0 ZnSe monolayers. The dot size and density in the fully ripened state are essentially independent of the initial ZnSe coverage. © 1998 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.122156

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