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Epitaxy of gold films on the structured (0001) sapphire surface

机译:结构化(0001)蓝宝石表面上的金膜外延

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The oriented growth of gold films from vapor phase occurs on (0001) sapphire substrates heated to 500A degrees C. Epitaxy is observed when gold nanocrystals reach a certain size under fixed external conditions. In the case of weak adhesion between a crystal and substrate, gold is crystallized on the edges of atomically smooth steps of the substrate in the form of a nanocrystals, mainly with the following three epitaxial relationships maintained: the (111), (100), and (211) planes with high atomic density are oriented parallel to the (0001)Al2O3 plane. At lower temperatures, gold is crystallized on substrates in the form of nanocrystals 100-120 nm in size, ordered along the step edges and having no preferred orientation.
机译:金膜从气相的定向生长发生在加热到500A的(0001)蓝宝石衬底上。当金纳米晶体在固定的外部条件下达到一定尺寸时,会观察到外延。在晶体与基板之间的附着力较弱的情况下,金会以纳米晶体的形式在基板原子光滑台阶的边缘上结晶,主要保持以下三种外延关系:(111),(100),具有高原子密度的(211)平面平行于(0001)Al 2 O 3平面。在较低温度下,金在基板上以尺寸为100-120 nm的纳米晶体形式结晶,沿台阶边缘有序排列,并且没有优选的取向。

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