Charge-Transfer Induced Magnetic Field Effects of Nano-Carbon Heterojunctions
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 2014
- Accession Number
- AD1053479
Entities
People
- Maogang Gong
- Mark Hersam
- Ren Shenqiang
- Tejas Shastry
- Wei Qin
Organizations
- Department of Chemistry