Elucidating the Electronic Properties of Single-Wall Carbon Nanohorns

Anna Zieleniewska, Fabian Lodermeyer, Maurizio Prato, Garry Rumbles, Dirk M. Guldi, Jeffrey L. Blackburn

Research output: Contribution to journalArticlepeer-review

4 Scopus Citations


Single-walled carbon nanohorns are an allotrope of carbon with promising properties for a variety of applications. Despite their promise, the majority carrier type (i.e. electrons or holes) that defines the electronic properties of this novel semiconductor is poorly understood and so far only indirect measurements have been employed to arrive at contradictory results. Here, we directly determine the majority carrier type in single-wall carbon nanohorns for the first time by means of thermopower measurements. Using this direct method, we show that SWCNH films exhibit a positive Seebeck coefficient indicating that SWCNHs behave as p-type semiconductors. This result is further corroborated by intentionally tuning the hole or electron concentrations of SWCNH layers via redox doping with molecular electron acceptors and donors, respectively. These results provide a framework for both measuring and chemically tuning the majority carrier type in this emerging nanocarbon semiconductor.

Original languageAmerican English
Pages (from-to)5783-5786
Number of pages4
JournalJournal of Materials Chemistry C
Issue number15
StatePublished - 23 Mar 2022

Bibliographical note

Publisher Copyright:
© 2022 The Royal Society of Chemistry.

NREL Publication Number

  • NREL/JA-5K00-82424


  • electronic properties
  • nanocarbon semiconductor
  • novel semiconductors
  • single-walled carbon nanohorns
  • solar-photochemistry
  • thermopower measurements


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