Scanning Tunneling Microscopy and Molecular Dynamics Study of the Li2TiO3(001) Surface

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• 作者：Kisaburo Azuma ; Coinneach Dover ; David C. Grinter ; Ricardo Grau-Crespo ; Neyvis Almora-Barrios ; Geoff Thornton ; Takuji Oda ; Satoru Tanaka
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：March 14, 2013
• 年：2013
• 卷：117
• 期：10
• 页码：5126-5131
• 全文大小：375K
• 年卷期：v.117,no.10(March 14, 2013)
• ISSN：1932-7455

文摘

We have investigated the (001) surface structure of lithium titanate (Li₂TiO₃) using auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and scanning tunneling microscopy (STM). Li₂TiO₃ is a potential fusion reactor blanket material. After annealing at 1200 K, LEED demonstrated that the Li₂TiO₃(001) surface was well ordered and not reconstructed. STM imaging showed that terraces are separated in height by about 0.3 nm suggesting a single termination layer. Moreover, hexagonal patterns with a periodicity of 0.4 nm are observed. On the basis of molecular dynamics (MD) simulations, these are interpreted as a dynamic arrangement of Li atoms.