Self-assembled two-dimensional heteromolecular nanoporous molecular arrays on epitaxial graphene

Hunter J. Karmel, Teyu Chien, Vincent Demers-Carpentier, John J. Garramone, Mark Hersam*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The development of graphene functionalization strategies that simultaneously achieve two-dimensional (2D) spatial periodicity and substrate registry is of critical importance for graphene-based nanoelectronics and related technologies. Here, we demonstrate the generation of a hydrogen-bonded molecularly thin organic heteromolecular nanoporous network on epitaxial graphene on SiC(0001) using room-temperature ultrahigh vacuum scanning tunneling microscopy. In particular, perylenetetracarboxylic diimide (PTCDI) and melamine are intermixed to form a spatially periodic 2D nanoporous network architecture with hexagonal symmetry and a lattice parameter of 3.45 ± 0.10 nm. The resulting adlayer is in registry with the underlying graphene substrate and possesses a characteristic domain size of 40-50 nm. This molecularly defined nanoporous network holds promise as a template for 2D ordered chemical modification of graphene at lengths scales relevant for graphene band structure engineering.

Original languageEnglish (US)
Pages (from-to)270-274
Number of pages5
JournalJournal of Physical Chemistry Letters
Issue number2
StatePublished - Jan 16 2014


  • melamine
  • nanostructures
  • scanning tunneling microscopy
  • self-assembly
  • surface chemistry

ASJC Scopus subject areas

  • Materials Science(all)


Dive into the research topics of 'Self-assembled two-dimensional heteromolecular nanoporous molecular arrays on epitaxial graphene'. Together they form a unique fingerprint.

Cite this