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Related Experiment Video

Updated: Jun 10, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

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Sorting single-walled carbon nanotubes by electronic type using nonionic, biocompatible block copolymers.

Alexander L Antaris1, Jung-Woo T Seo, Alexander A Green

  • 1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA.

ACS Nano
|July 31, 2010
PubMed
Summary
This summary is machine-generated.

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Nonionic block copolymers effectively separate semiconducting and metallic single-walled carbon nanotubes (SWNTs) using density gradient ultracentrifugation. This method achieves high purity for both types of SWNTs, enabling new technological applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Chemistry

Background:

  • As-synthesized single-walled carbon nanotubes (SWNTs) exhibit polydispersity in diameter and electronic properties.
  • This heterogeneity impedes the advancement of SWNT-based technologies.
  • Post-synthesis sorting methods are crucial for isolating SWNTs based on their structure.

Purpose of the Study:

  • To investigate the use of nonionic, biocompatible block copolymers for sorting SWNTs.
  • To determine the effectiveness of density gradient ultracentrifugation with block copolymers for SWNT separation.
  • To achieve high-purity semiconducting and metallic SWNTs.

Main Methods:

  • Density gradient ultracentrifugation was employed for SWNT separation.
  • Nonionic, biocompatible Pluronic and Tetronic block copolymers were utilized as sorting agents.

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Last Updated: Jun 10, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
09:12

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Published on: June 1, 2016

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  • Different block copolymer structures, specifically hydrophobic chain lengths and shapes, were tested.

    • Main Results:

    • Pluronic block copolymers with shorter hydrophobic chains yielded high-purity semiconducting SWNTs (>99% purity with Pluronic F68).
    • Tetronic block copolymers showed an affinity for metallic SWNTs, achieving 74% purity with Tetronic 1107.
    • The study demonstrated successful separation of semiconducting and metallic SWNTs.

    Conclusions:

    • Nonionic block copolymers are effective for high-fidelity, high-yield density gradient separation of SWNTs.
    • Rationally designed block copolymers can generate biocompatible, monodisperse SWNTs for diverse applications.
    • This sorting method advances the development of SWNT-based technologies.