Janus Graphene: Scalable Self-Assembly and Solution-Phase Orthogonal Functionalization

Intak Jeon, Martin D. Peeks, Suchol Savagatrup, Lukas Zeininger, Sehoon Chang, Gawain Thomas, Wei Wang, Timothy M. Swager

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Orthogonal functionalization of 2D materials by selective assembly at interfaces provides opportunities to create new materials with transformative properties. Challenges remain in realizing controllable, scalable surface-selective, and orthogonal functionalization. Herein, dynamic covalent assembly is reported that directs the functionalization of graphene surfaces at liquid–liquid interfaces. This process allows facile addition and segregation of chemical functionalities to impart Janus characteristics to graphenes. Specifically, dynamic covalent functionalization is accomplished via Meisenheimer complexes produced by reactions of primary amines with pendant dinitroaromatics attached to graphenes. Janus graphenes are demonstrated to be powerful surfactants that organize at water/organic, water/fluorocarbon, and organic/fluorocarbon liquid interfaces. This approach provides general access to the creation of diverse surfactant materials and promising building blocks for 2D materials.

Original languageEnglish (US)
Article number1900438
JournalAdvanced Materials
Issue number21
StatePublished - May 24 2019
Externally publishedYes


  • Janus
  • graphene
  • interfacial arrangement
  • interfacial trapping
  • self-assembly

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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