Controllable oxidation of h-BN monolayer on Ir(111) studied by core-level spectroscopies
Författare
Summary, in English
The effect of atomic oxygen adsorption on the structure and electronic properties of monolayer hexagonal boron nitride (h-BN) grown on Ir(111) has been studied using near edge X-ray absorption fine structure spectroscopy (NEXAFS), photoelectron spectroscopy (PES), and low-energy electron diffraction (LEED). It has been shown that the oxidation of the h-BN monolayer occurs through a gradual substitution of N by O in the h-BN lattice. This process leads to the formation of defect sites corresponding to three different types of the B atom environment (BN3-xOx with x=1,2,3). The oxidation of the h-BN monolayer is very different from the case of graphene on Ir(111), where adsorption of atomic oxygen results mainly in the formation of epoxy groups [J. Phys. Chem. C. 115, 9568 (2011)]. A post-annealing of the h-BN monolayer after oxygen exposure results in further destruction of the B N bonds and formation of a B2O3-like structure. (C) 2011 Elsevier B.V. All rights reserved.
Avdelning/ar
Publiceringsår
2012
Språk
Engelska
Sidor
564-570
Publikation/Tidskrift/Serie
Surface Science
Volym
606
Issue
3-4
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Natural Sciences
- Physical Sciences
Nyckelord
- Photoelectron spectroscopy
- Near-edge X-ray absorption fine structure
- h-BN monolayer
- Graphene
- Oxidation
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0039-6028