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Structural and microstructural study of novel stacked toroidal carbon nanotubes
Maciej Gubernat1, Marcel Zambrzycki1, Aneta Fraczek-Szczypta1
1AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Al. Mickiewicza 30, Cracow, 30-059, Poland.
Micron (Oxford, England : 1993)
|December 30, 2019
Summary
Researchers developed novel stacked toroidal carbon nanotubes (STCNT) using a catalyst-free process. This new nanostructure, grown from methane, offers unique properties for advanced materials applications.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Carbon nanostructures are crucial for advanced materials.
- Developing novel carbon forms with controlled morphology is an active research area.
- Catalyst-free synthesis methods offer advantages in purity and scalability.
Purpose of the Study:
- To present a new carbon nanostructure: stacked toroidal carbon nanotubes (STCNT).
- To investigate the synthesis and characterization of STCNT.
- To explore the morphology and composition of the novel nanostructure.
Main Methods:
- Catalyst-free vapor deposition of STCNT from methane on a graphite substrate.
- Characterization using Transmission Electron Microscopy (TEM).
- Analysis via Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM/EDX), Raman spectroscopy, X-ray Diffraction, and X-ray photoelectron spectroscopy.
Main Results:
- Successfully synthesized STCNT via a gas-phase, catalyst-free deposition process.
- TEM revealed STCNT composed of rolled multi-walled carbon nanotubes forming toroidal structures.
- SEM/EDX confirmed a pure carbon structure with an average toroid diameter of 1000 nm and inter-toroid spacing of 100 nm. Internal carbon spheres were observed.
Conclusions:
- A novel STCNT nanostructure has been successfully synthesized and characterized.
- The catalyst-free method yields pure carbon toroids with unique morphology.
- The findings open avenues for new applications of toroidal carbon nanostructures.
