Carbon nanotube chirality determines properties of encapsulated linear carbon chain
- Author(s)
- Sebastian Heeg, Lei Shi, Lisa V. Poulikakos, Thomas Pichler, Lukas Novotny
- Abstract
Long linear carbon chains (LLCCs) encapsulated inside double-walled carbon nanotubes (DWCNTs) are regarded as a promising realization of carbyne, the truly one- dimensional allotrope of carbon. While the electronic and vibronic properties of the encapsulated LLCC are expected to be influenced by its nanotube host, this dependence has not been investigated experimentally so far. Here we bridge this gap by studying individual LLCCs encapsulated in DWCNTs with tip-enhanced Raman scattering (TERS). We reveal that the nanotube host, characterized by its chirality, determines the vibronic and electronic properties of the encapsulated LLCC. By choice of chirality, the fundamental Raman mode (C-mode) of the chain is tunable by ~85 cm−1 and its band gap by ~0.5 eV, suggesting this one-dimensional hybrid system to be a promising building block for nanoscale optoelectronics. No length dependence of the chain's C-mode frequency is evident, making LLCCs a close to perfect representation of carbyne.
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- Eidgenössische Technische Hochschule Zürich
- Journal
- Nano Letters
- Volume
- 18
- Pages
- 5426–5431
- No. of pages
- 6
- ISSN
- 1530-6984
- DOI
- https://doi.org/10.1021/acs.nanolett.8b01681
- Publication date
- 08-2018
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Condensed Matter Physics, Mechanical Engineering, Bioengineering, Chemistry(all), Materials Science(all)
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/carbon-nanotube-chirality-determines-properties-of-encapsulated-linear-carbon-chain(fffbe208-c695-44d1-9506-c50e2b0cee24).html