Title of article :
Single NbO nano-crystal formation on low temperature annealed Nb(0 0 1) surface
Author/Authors :
Uehara، نويسنده , , Y and Fujita، نويسنده , , T and Iwami، نويسنده , , M and Ushioda، نويسنده , , S، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2001
Abstract :
We have investigated the (0 0 1) surface of single crystal niobium annealed at 1000°C in ultra-high vacuum. Oxygen as well as niobium atoms were 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) protrusions 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 (0 0 1) surface of metallic niobium.
Keywords :
X-ray photoelectron spectroscopy , and topography , Scanning tunneling microscopy , Roughness , niobium , Surface structure morphology
Journal title :
Surface Science
Journal title :
Surface Science
