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Individualized p-Doped Carbon Nanohorns.

Anastasios Stergiou1, Zheng Liu2,3, Bin Xu4

  • 1Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens, 11635, Greece.

Angewandte Chemie (International Ed. in English)
|July 23, 2016
PubMed
Summary

Researchers developed a simple method to separate pristine carbon nanohorns (pr-CNHs) into individualized carbon nanohorns (in-CNHs) using chlorosulfonic acid. This process also resulted in p-doped individualized carbon nanohorns.

Keywords:
carbon nanohornschlorosulfonic acidelectronic propertiesindividualizationp-doping

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Carbon nanohorns (CNHs) are a unique carbon allotrope with a spherical, aggregated structure.
  • Individualizing CNHs is crucial for unlocking their full potential in various applications.
  • Existing methods for CNH individualization can be complex or inefficient.

Purpose of the Study:

  • To establish a facile and effective method for the individualization of pristine carbon nanohorns (pr-CNHs).
  • To investigate the properties of the resulting individualized carbon nanohorns (in-CNHs).
  • To understand the doping mechanism of the individualized carbon nanohorns.

Main Methods:

  • Treatment of aggregated pr-CNHs with chlorosulfonic acid.
  • Characterization using high-resolution transmission electron microscopy (HRTEM).
  • Spectroscopic analysis including Raman and ultraviolet photoemission spectroscopy (UPS).
  • Theoretical calculations and thermogravimetric analysis (TGA).

Main Results:

  • A straightforward chemical treatment successfully disintegrated spherical pr-CNHs into individualized carbon nanohorns (in-CNHs).
  • The process generated positively charged polarized species that facilitated the separation.
  • The isolated in-CNHs exhibited p-type doping due to the adsorption of chlorosulfonate units.
  • Experimental data were corroborated by theoretical calculations and TGA.

Conclusions:

  • Chlorosulfonic acid treatment provides an efficient route to individualize pr-CNHs.
  • The developed method yields p-doped in-CNHs with potential for electronic applications.
  • This work offers a new perspective on modifying and utilizing carbon nanohorn structures.