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Threading carbon nanotubes through a self-assembled nanotube.

Mingyang Ji1, McKensie L Mason1, David A Modarelli2

  • 1Department of Chemistry , The Ohio State University , 100 W. 18th Ave. , Columbus , Ohio 43210 , USA .

Chemical Science
|December 20, 2019
PubMed
Summary

This study demonstrates a novel method for creating ordered, three-component nanomaterials by threading single-walled carbon nanotubes (SWNTs) with naphthalenediimide-lysine (NDI-Bola) nanotubes and subsequently coating them with poly(p-phenyleneethynylene) (PPE-SO3Na). This co-assembly approach yields functional composite nanostructures for advanced applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Creating ordered multicomponent nanomaterials is crucial for advanced applications like optoelectronics.
  • Self-assembly offers a powerful route to construct complex nanostructures with high internal order.
  • Controlling the spatial arrangement of different components within a nanostructure remains a significant challenge.

Purpose of the Study:

  • To develop a method for the co-assembly of single-walled carbon nanotubes (SWNTs) with bolaamphiphilic nanotubes.
  • To create a three-component (SWNT/NDI-Bola/PPE-SO3Na) composite nanostructure with defined layers.
  • To investigate the self-assembly mechanisms and structural evolution of the composite.

Main Methods:

  • Bolaamphiphilic self-assembly of naphthalenediimide-lysine (NDI-Bola) monomers into nanotubes.
  • Fragmentation of NDI-Bola nanotubes using sonication-induced shear to enhance threading efficiency.
  • Co-assembly of fragmented NDI-Bola nanotubes with SWNTs, driven by electrostatic and cation-π interactions.
  • Coaxial wrapping of poly(p-phenyleneethynylene) (PPE-SO3Na) around the SWNT/NDI-Bola composite.

Main Results:

  • Successfully threaded SWNTs within NDI-Bola nanotubes, forming a composite nanostructure.
  • NDI-Bola segments re-elongated along SWNTs, creating a continuous radial coating with a bilayer wall structure.
  • A three-component coaxial nanostructure (SWNT/NDI-Bola/PPE-SO3Na) was synthesized.
  • Electrostatic and cation-π interactions were identified as key drivers for the self-assembly process.

Conclusions:

  • Demonstrated a viable strategy for constructing complex, multi-layered nanomaterials through sequential self-assembly.
  • The developed method allows for precise control over component arrangement, leading to ordered nanostructures.
  • The resulting SWNT/NDI-Bola/PPE-SO3Na composite nanostructures hold potential for optoelectronic and other advanced material applications.