Self-assembled organic monolayers on epitaxial graphene with enhanced structural and thermal stability

Hunter J. Karmel, John J. Garramone, Jonathan D. Emery, Sumit Kewalramani, Michael J. Bedzyk, Mark C. Hersam*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Scanning tunnelling microscopy and X-ray reflectivity are used to characterize adlayers of perylenetetracarboxylic diimide (PTCDI) deposited on epitaxial graphene (EG) on SiC(0001). PTCDI adopts a herringbone structural phase on EG/SiC that can accommodate sub-5 nm voids with molecularly defined boundaries and isolated molecular vacancies at room temperature. The PTCDI monolayer remains intact up to substrate temperatures of 260 °C, thus demonstrating enhanced thermal stability compared to previously studied perylene derivatives on EG/SiC.

Original languageEnglish (US)
Pages (from-to)8852-8855
Number of pages4
JournalChemical Communications
Volume50
Issue number64
DOIs
StatePublished - Jul 15 2014

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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