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Composition of Polyprotic Acid Solutions as a Function of pH

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Related Experiment Video

Updated: Jan 26, 2026

Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
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Janus Graphene: Scalable Self-Assembly and Solution-Phase Orthogonal Functionalization.

Intak Jeon1, Martin D Peeks1, Suchol Savagatrup1

  • 1Department of Chemistry, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Advanced Materials (Deerfield Beach, Fla.)
|April 11, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method for functionalizing graphene surfaces at liquid-liquid interfaces using dynamic covalent assembly. This technique creates Janus graphenes, which act as effective surfactants for various liquid interfaces, enabling new material development.

Keywords:
Janusgrapheneinterfacial arrangementinterfacial trappingself-assembly

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Orthogonal functionalization of 2D materials is key for creating novel materials with unique properties.
  • Controllable and scalable methods for surface-selective functionalization remain a challenge.

Purpose of the Study:

  • To develop a dynamic covalent assembly method for controllable graphene functionalization at liquid-liquid interfaces.
  • To create Janus graphenes with segregated chemical functionalities.
  • To demonstrate the surfactant properties of these engineered graphenes.

Main Methods:

  • Utilized dynamic covalent chemistry to functionalize graphene surfaces.
  • Employed Meisenheimer complexes formed from primary amines and dinitroaromatics on graphene.
  • Investigated functionalization at various liquid-liquid interfaces.

Main Results:

  • Successfully achieved surface-selective and orthogonal functionalization of graphene.
  • Created Janus graphenes with distinct chemical properties on each side.
  • Demonstrated that Janus graphenes act as potent surfactants at water/organic, water/fluorocarbon, and organic/fluorocarbon interfaces.

Conclusions:

  • Dynamic covalent assembly provides a versatile route to Janus graphenes.
  • Janus graphenes exhibit excellent surfactant capabilities, organizing effectively at diverse liquid interfaces.
  • This approach offers a general strategy for creating novel surfactant materials and advanced 2D material building blocks.