Growth temperature dependent graphene alignment on Ir(111)

Hattab H, N'Diaye A, Wall D, Jnawali G, Coraux J, Busse C, Van Gastel R, Poelsema B, Michely T, Meyer Zu Heringdorf F, Horn-Von Hoegen M

Research article (journal)

Abstract

The morphology of graphene monolayers on Ir(111) prepared by thermal decomposition of ethylene between 1000 and 1530 K was studied with high resolution low energy electron diffraction. In addition to a well-oriented epitaxial phase, randomly oriented domains are observed for growth temperatures between 1255 and 1460 K. For rotational angles of ±3° around 30° these domains lock-in in a 30° oriented epitaxial phase. Below 1200 K the graphene layer exhibits high disorder and structural disintegrity. Above 1500 K the clear moiré spots reflect graphene in a single orientation epitaxial incommensurate phase.

Details zur Publikation

Release year: 2011
Language in which the publication is written: English
Link to the full text: http://www.scopus.com/inward/record.url?eid=2-s2.0-79954455900&partnerID=40&md5=757fcd0fcb931dedbfb7ef083875b058