Nanoscale phenomena ruling deposition and intercalation of AlN at the graphene/SiC interface

Data di pubblicazione: 1 Gen 2020

RivistaFonte dati: ARCHIVIO

The possibility for kinetic stabilization of prospective 2D AlN was explored by rationalizing metal organic chemical vapor deposition (MOCVD) processes of AlN on epitaxial graphene. From the wide range of temperatures which can be covered in the same MOCVD reactor, the deposition was performed at the selected temperatures of 700, 900, and 1240oC. The characterization of the structures by atomic force microscopy, electron microscopy and Raman spectroscopy revealed a broad range of surface nucleation and intercalation phenomena. These phenomena included the abundant formation of nucleation sites on graphene, the fragmentation of the graphene layers which accelerated with the deposition temperature, the delivery of excess precursor-derived carbon adatoms to the surface, as well as intercalation of sub-layers of aluminum atoms at the graphene/SiC interface. The conceptual understanding of …

Editore
Royal Society of Chemistry
Fonte
Nanoscale
ID archivio
7c3f040d95c4957ba36f72d01a958f10