Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 26: Poster Session - Graphene: Growth, Structure and Substrate Interaction
O 26.3: Poster
Monday, March 16, 2020, 18:15–20:00, P1A
LEED and LEEM Study of Hexagonal Boron Nitride Islands and 6x2 Boron Reconstruction on Ir(111) Grown via Thermal Catalytic Decomposition of Borazine (B3H6N3) — •Marko Kriegel1, Karim Omambac1, Christian Brand1, Pascal Dreher1, David Janoschka1, Ulrich Hagemann2, Nils Hartmann2, Frank Meyer zu Heringdorf1,2, and Michael Horn-von Hoegen1 — 1Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany — 2Interdisciplinary Center for Analytics on the Nanoscale (ICAN) Carl-Benz-Str. 199, 47057 Duisburg, Germany
High quality large area hexagonal boron nitride layers are grown on Ir(111) via thermal catalytic decomposition of borazine (B3H6N3) using CVD technique. The preparation of large (6x2) reconstructed 2D boron islands [1] is initiated by the dissolution of boron into the bulk at high temperatures followed by subsequent segregation of boron atoms to the surface upon cooling [2]. The surface morphology and structure determination has been performed in-situ by high-resolution spot profile analyzing-LEED (SPA-LEED), real-time growth observation via low energy electron microscopy (LEEM) and ex-situ by atomic force microscopy (AFM). The chemical composition has been determined ex-situ by X-ray photoemission spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS) measurements.
[1] Applied Surface Science 420, 504-510 (2017)
[2] ACS Nano 13, 3816-3822 (2019)