4.6 Article

Modification of the surface energy and morphology of GaN monolayers on the AlN surface in an ammonia flow

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Summary: The transformation of a two-dimensional elastically strained GaN layer on the AlN surface into GaN quantum dots after switching off the ammonia flow at different temperatures was studied. It was observed that a reverse 3D-2D transition occurs after a forward 2D-3D transition. The changes in elemental composition and surface energy of GaN after switching off the ammonia were calculated, showing that the transitions are explained by the non-monotonic behavior of surface energy.

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