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

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

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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
Pages (from-to)270-274
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume5
Issue number2
DOIs
Publication statusPublished - Jan 16 2014

Fingerprint

Graphite
Graphene
graphene
melamine
Melamine
Nanoelectronics
Chemical modification
Ultrahigh vacuum
Scanning tunneling microscopy
Substrates
Network architecture
Band structure
ultrahigh vacuum
Lattice constants
scanning tunneling microscopy
periodic variations
Hydrogen
lattice parameters
templates
engineering

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Self-assembled two-dimensional heteromolecular nanoporous molecular arrays on epitaxial graphene. / Karmel, Hunter J.; Chien, Teyu; Demers-Carpentier, Vincent; Garramone, John J.; Hersam, Mark C.

In: Journal of Physical Chemistry Letters, Vol. 5, No. 2, 16.01.2014, p. 270-274.

Research output: Contribution to journalArticle

Karmel, Hunter J. ; Chien, Teyu ; Demers-Carpentier, Vincent ; Garramone, John J. ; Hersam, Mark C. / Self-assembled two-dimensional heteromolecular nanoporous molecular arrays on epitaxial graphene. In: Journal of Physical Chemistry Letters. 2014 ; Vol. 5, No. 2. pp. 270-274.
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