Lee Sung Bo, Phillipp Fritz, Sigle Wilfried, Rühle Manfred
Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, 70569 Stuttgart, Germany.
Ultramicroscopy. 2005 Aug;104(1):30-8. doi: 10.1016/j.ultramic.2005.02.005. Epub 2005 Mar 18.
The formation and time evolution of TiO islands on SrTiO3(001) surface facets at 970 degrees C are studied by in situ high-resolution transmission electron microscopy (HRTEM). The exact surface morphology of the islands and the interface between the islands and the SrTiO3 bulk are characterized by profile imaging in cross-section. At the initial stage of formation, the islands contain crystal defects which disappear after annealing times for longer than 100 min. Lattice parameter measurement from the HRTEM images reveals that the crystal islands may be identified as TiO. They are faceted in shape, having the {001} and {011} facet components. During annealing for about 2.5 h the islands grow to sizes of 3-4 nm in equivalent sphere radius, and shrink again during longer annealing. The interface between the TiO islands and the SrTiO3 bulk also shows faceting.
利用原位高分辨率透射电子显微镜（HRTEM）研究了970℃下SrTiO3(001)表面晶面上TiO岛的形成及随时间的演变。通过截面轮廓成像对岛的精确表面形态以及岛与SrTiO3块体之间的界面进行了表征。在形成初期，岛中含有晶体缺陷，这些缺陷在退火时间超过100分钟后消失。从HRTEM图像进行的晶格参数测量表明，晶体岛可被鉴定为TiO。它们呈多面体形，具有{001}和{011}面成分。在约2.5小时的退火过程中，岛生长到等效球半径为3 - 4 nm的尺寸，而在更长时间的退火过程中又会收缩。TiO岛与SrTiO3块体之间的界面也呈现出多面性。
