Atomic Structure of a Spinel-Like Transition Al2O3(100) Surface

作者：Jensen Thomas N^*; Meinander Kristoffer; Helveg Stig; Foster Adam S; Kulju Sampo; Musso Tiziana; Lauritsen Jeppe V

来源：Physical Review Letters, 2014, 113(10): 106103.

DOI：10.1103/PhysRevLett.113.106103

We study a crystalline epitaxial alumina thin film with the characteristics of a spinel-type transition Al2O3(100) surface by using atom-resolved noncontact atomic force microscopy and density functional theory. It is shown that the films are terminated by an Al-O layer rich in Al vacancies, exhibiting a strong preference for surface hydroxyl group formation in two configurations. The transition alumina films are crystalline and perfectly stable in ambient atmospheres, a quality which is expected to open the door to new fundamental studies of the surfaces of transition aluminas.

• 出版日期2014-9-4