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Charge-Transfer Induced Magnetic Field Effects of Nano-Carbon Heterojunctions

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Journal Article - Open Access

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Department of Chemistry, University of Kansas Lawrence United States

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Room temperature magnetic field effects have not been definitively observed in either single-walled carbon nanotubes SWCNTs or C60 under a small magnetic field due to their weak hyperfine interaction and slight difference of g-factor between positive and negative polarons. Here, we demonstrate charge-transfer induced magnetic field effects in nano-carbon C60-SWCNT bulk heterojunctions at room temperature, where the mechanism of magnetic field effects is verified using excited state transition modeling. By controlling SWCNT concentrations and interfacial interactions, nano-carbon heterojunctions exhibit tunability of charge-transfer density and room temperature magneto conductance of 2.8 under 100 m Texternal magnetic field. External stimuli, such as electric field and photoexcitation, also play an important role in controlling the magnetic field effects of nano-carbon heterojunctions, which suggests that these findings could enable the control of optoelectronic properties of nano-carbon heterojunctions.

Subject Categories:

  • Miscellaneous Materials
  • Electricity and Magnetism

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