Molecular beam growth of micrometer-size graphene on mica
2013 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 52, 40-48 p.Article in journal (Refereed) Published
We demonstrate molecular beam growth of graphene on biotite mica substrates at temperatures below 1000 °C. As indicated by optical and atomic force microscopy, evaporation of carbon from a high purity solid-state source onto biotite surface results in the formation of single-, bi-, and multilayer graphene with size in the micrometer regime. It is shown that the graphene grown directly on mica surface is of very high crystalline quality with the defect density below the threshold detectable by Raman spectroscopy. The interaction between graphene and the mica substrate is studied by comparison of the Raman spectroscopy and atomic force microscopy data with the corresponding results obtained for graphene flakes mechanically exfoliated onto biotite substrates. Experimental insights are combined with density functional theory calculations to propose a model for the initial stage of the van der Waals growth of graphene on mica surfaces. This work provides hints on how the direct growth of high quality graphene on insulators can be realized in general without exceeding the thermal budget limitations of Si technologies.
Place, publisher, year, edition, pages
2013. Vol. 52, 40-48 p.
Density functional theory calculations, Direct growth, High purity, High quality, High-crystalline quality, Initial stages, Mica substrates, Mica surfaces, Si technology, Solid-state sources, Thermal budget, Van der waals, Atomic force microscopy, Density functional theory, Graphene, Micrometers, Molecular beams, Optical multilayers, Raman spectroscopy, Substrates, Van der Waals forces, Mica
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-118307DOI: 10.1016/j.carbon.2012.09.001ISI: 000314192700005ScopusID: 2-s2.0-84869499164OAI: oai:DiVA.org:kth-118307DiVA: diva2:605711
FunderEU, European Research Council, 259286
QC 201302152013-02-152013-02-142013-03-08Bibliographically approved