Electronic Structure of Carbon Nanotubes with Ultrahigh Curvature
- Author(s)
- Wolfgang Plank, Rudolf Pfeiffer, Christoph Schaman, Hans Kuzmany, Matteo Calvaresi, Francesco Zerbetto, Jannik C. Meyer
- Abstract
The electronic and the vibrational structure of carbon nanotubes with ultrahigh curvature was systematically studied by resonance Raman scattering, high-resolution transmission electron microscopy (HRTEM), molecular dynamics, and ab initio DFT calculations. The ultrahigh curvature tubes were grown inside commercial HiPco tubes after filling the latter with the small but carbon-rich molecule ferrocene. TEM showed partial filling of the outer tubes with inner tubes and mobility of the latter in the electron beam. The smallest analyzed tube was of (5,0) chirality and had a OFT determined diameter of 0.406 nm and a radial breathing mode frequency of 570 cm(-1). For all inner tubes which had transitions in the visible spectral range, transition energies and RBM frequencies were determined with a resonance width of only 45 meV. Experimentally determined transition energies revealed dramatic deviations up to several electronvolts compared to tight-binding calculations and a significant family spread of more than 2 eV but were in agreement with many electron contribution corrected extended tight-binding results and with results from DFT calculations.
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- University of Bologna, Universität Ulm
- Journal
- ACS Nano
- Volume
- 4
- Pages
- 4515-4522
- No. of pages
- 8
- ISSN
- 1936-0851
- DOI
- https://doi.org/10.1021/nn100615d
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/bba7fb96-41f1-4b00-96e2-711cb9380acb