Single NbO nano-crystal formation on low temperature annealed Nb(001) surface

Authors
Uehara, Y Fujita, T Iwami, M Ushioda, S
Citation
Y. Uehara et al., Single NbO nano-crystal formation on low temperature annealed Nb(001) surface, SURF SCI, 472(1-2), 2001, pp. 59-62
Citations number
17
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
472
Issue
1-2
Year of publication
2001
Pages
59 - 62
Database
ISI
SICI code
0039-6028(20010120)472:1-2<59:SNNFOL>2.0.ZU;2-D
Abstract
We have investigated the (0 0 1) surface of single crystal niobium annealed at 1000 degreesC in ultra-high vacuum. Oxygen as well as niobium atoms wer e detected from the surface with the composition ratio of Nb:O = 1:0.9 by X -ray photoemission spectroscopy. Scanning tunneling microscopy observation revealed that the entire surface is covered by small (nanometer in size) pr otrusions having a pyramid shape with a flat top. Based on these results we have concluded that the protrusions are single nano-crystals of NbO grown epitaxially on the (001) surface of metallic niobium. (C) 2001 Elsevier Sci ence B.V. All rights reserved.