Self-assembled air-stable supramolecular porous networks on graphene

Bing Li, Kazukuni Tahara, Jinne Adisoejoso, Willem Vanderlinden, Kunal S. Mali, Stefan De Gendt, Tobe Yoshito, Steven De Feyter*

*Corresponding author for this work

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Functionalization and modification of graphene at the nanometer scale is desirable for many applications. Supramolecular assembly offers an attractive approach in this regard, as many organic molecules form well-defined patterns on surfaces such as graphite via physisorption. Here we show that ordered porous supramolecular networks with different pore sizes can be readily fabricated on different graphene substrates via self-assembly of dehydrobenzo[12]annulene (DBA) derivatives at the interface between graphene and an organic liquid. Molecular resolution scanning tunneling microscopy (STM) and atomic force microscopy (AFM) investigations reveal that the extended honeycomb networks are highly flexible and that they follow the topological features of the graphene surface without any discontinuity, irrespective of the step-edges present in the substrate underneath. We also demonstrate the stability of these networks under liquid as well as ambient air conditions. The robust yet flexible DBA network adsorbed on graphene surface is a unique platform for further functionalization and modification of graphene. Identical network formation irrespective of the substrate supporting the graphene layer and the level of surface roughness illustrates the versatility of these building blocks.

Original languageEnglish
Pages (from-to)10764-10772
Number of pages9
JournalACS Nano
Volume7
Issue number12
DOIs
StatePublished - 23 Dec 2013

Keywords

  • atomic force microscopy
  • graphene
  • porous networks
  • scanning tunneling microscopy
  • self-assembly
  • supramolecular

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    Li, B., Tahara, K., Adisoejoso, J., Vanderlinden, W., Mali, K. S., De Gendt, S., Yoshito, T., & De Feyter, S. (2013). Self-assembled air-stable supramolecular porous networks on graphene. ACS Nano, 7(12), 10764-10772. https://doi.org/10.1021/nn4039047