Manipulation of individual water molecules on CeO_2(111)
Manipulation of individual water molecules on CeO_2(111)
复制标题
CeO_2(111)上单个水分子的操纵
DOI：
10.1088/0953-8984/24/8/084010
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
S. Morita and M. Reichling
中科院分区：
文献类型：
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作者：
S. Torbrugge;O. Custance;S. Morita and M. Reichling
通过非接触式原子力显微镜 (NC-AFM) 在 10 至 300 K 范围内的多个针尖-样品温度下研究吸附在 CeO 2 (111) 表面上的水分子。根据针尖-表面相互作用的强度，它们表现为延伸到三个表面氧原子上的三角形突起或中空部位的小凹坑。在尖端靠近表面的 NC-AFM 成像过程中，偶尔会观察到尖端和表面之间的分子转移或尖端引起的水分子横向位移到等效表面晶格位置。我们报告了如何利用这种情况来产生受控的横向操作。演示了一种在规则晶格的预定义相邻等效吸附位点之间以及跨表面氧空位操纵水分子的协议。
Water molecules adsorbed on the CeO 2 (111) surface are investigated by non-contact atomic force microscopy (NC-AFM) at several tip–sample temperatures ranging between 10 and 300 K. Depending on the strength of the tip–surface interaction, they appear as triangular protrusions extended over three surface oxygen atoms or as small pits at hollow sites. During NC-AFM imaging with the tip being close to the surface, occasionally the transfer of molecules between tip and surface or the tip-induced lateral displacement of water molecules to equivalent surface lattice sites is observed. We report how this situation can be exploited to produce controlled lateral manipulations. A protocol to manipulate the water molecules between pre-defined neighbouring equivalent adsorption sites of the regular lattice as well as across a surface oxygen vacancy is demonstrated.