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Related Experiment Video

Updated: May 10, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
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Variable range hopping in single-wall carbon nanotube thin films: a processing-structure-property relationship study.

Sida Luo1, Tao Liu, Shermane M Benjamin

  • 1High-Performance Materials Institute, FAMU-FSU College of Engineering, Florida State University, 2525 Pottsdamer Street, Tallahassee, Florida 32310, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|June 12, 2013
PubMed
Summary

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This study prepared single-walled carbon nanotube (SWCNT) thin films and found that SWCNT length significantly impacts charge transport. Shorter SWCNTs (under 700 nm) drastically increase the Mott characteristic temperature (T0), affecting electron localization.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Single-walled carbon nanotubes (SWCNTs) are promising nanomaterials for electronic applications.
  • Controlling SWCNT dimensions is crucial for tailoring their electrical properties.
  • Understanding charge transport mechanisms in SWCNT films is essential for device performance.

Purpose of the Study:

  • To investigate the effect of SWCNT length and diameter on charge transport in SWCNT thin films.
  • To establish correlations between SWCNT structural parameters and electrical properties.
  • To determine the dominant conduction mechanism in SWCNT thin films.

Main Methods:

  • Preparation of SWCNT dispersions with controlled dimensions using ultrasonication and ultracentrifugation.

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Last Updated: May 10, 2026

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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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  • Characterization of SWCNT dispersions using preparative ultracentrifuge method (PUM) and dynamic light scattering (DLS).
  • Fabrication of SWCNT thin films via spray coating and analysis using optical, spectroscopic, and electrical measurements.

    • Main Results:

    • The three-dimensional variable range hopping (3D VRH) model accurately describes the temperature-dependent sheet resistance of all SWCNT thin films.
    • A strong correlation was found between SWCNT length and the 3D VRH parameter T0 (Mott characteristic temperature).
    • T0 increased significantly for SWCNT lengths below ~700 nm, with weaker dependence for longer SWCNTs.

    Conclusions:

    • SWCNT length is a critical factor influencing charge transport in SWCNT thin films.
    • The electron localization length in SWCNT films exhibits a similar length-dependent behavior.
    • The findings provide insights into optimizing SWCNT film properties for electronic applications.