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Growth of epitaxial anatase nano islands on SrTiO_3(001) by dip coating

机译:通过浸涂在SrTiO_3(001)上生长外延锐钛矿纳米岛

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摘要

High temperature annealing of ultrathin anatase-TiO_2(001) thin films deposited on SrTiO_3(001) substrates by a dip coating method leads to the self-assembly of an array of square-shaped epitaxial anatase islands with lateral dimensions of order 150 nm. The procedure developed here provides a very cheap and simple approach to preparation of oriented anatase nanocrystals with a distribution of surface terminations very different to that found in free-standing material. In particular, the {101} facets which are dominant for unsupported nanocrystalline anatase are completely absent, and the (001) islands are instead bounded by sloping {103} side facets.
机译:通过浸涂法在SrTiO_3(001)衬底上沉积的超薄锐钛矿型TiO_2(001)薄膜进行高温退火导致了横向尺寸为150 nm的方形外延锐钛矿岛阵列的自组装。本文开发的方法为制备定向锐钛矿纳米晶体提供了一种非常便宜且简单的方法,该锐钛矿纳米晶体的表面末端的分布与自支撑材料中的非常不同。特别地,完全不存在对于不支持的纳米晶锐钛矿而言占优势的{101}小平面,而(001)岛则由倾斜的{103}侧面限定。

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