Group

 

Contact

Prof. Dr. Mark H. Rümmeli

Postal address:
IFW Dresden e. V.
PF 270116
01171 Dresden
Germany

Visitor address:
IFW Dresden e. V.
Helmholtzstraße 20
01069 Dresden
Germany

Phone:
+49 (0)351 4659-510

Fax:
+49 (0)351 4659-313

Email:
m.ruemmeli
@ifw-dresden.de

 

 

Synthesis of Single Wall Carbon Nanotubes by Laser Evaporation

The identification of single wall carbon nanotubes (SWCNT) can certainly be considered as one of the most significant stimulants for research in to nanostructures. This is due to their remarkable electronic and mechanical properties. In turn, this has led to a strong demand of SWCNTs for research and commercial applications. In addition, there is a need to clearly understand the growth mechanisms so as to have control over the electronic properties of SWCNT.

We have several laser ablation systems available to us through our own facilities and jointly with the Technical University Dresden.


Schematic of a laser ablation reactor:

TEM image of SWCNT bundle synthesized with a Ni-Co binary catalyst at 1200C

Areas of interest:

  • Analysis of the production conditions by laser ablation:
    SWCNT yield, mean diameter and diameter distribution as function of temperature, gas, pressure, catalyst particles, laser pulse etc.
  • Studies on the growth mechanisms:

TEM images of SWCNT bundles synthesized with metal oxide catalysts at low temperature:

a) MgO catalyst at 500C
b) PbO2 catalyst at room temperature
c) In2O3 catalyst at room temperature.
  • Special SWCNT: e.g. 13C doped SWCNT for NMR studies:
Relative downshift of the G mode Raman spectra as a function of 13C enrichment. Vertical dotted line indicates the non-shifting G mode.
  • Development of a CO2 CW laser ablation system.

Selected Papers:

M. H. Rümmeli, C. Kramberger, M. Loeffler, O. Jost, M. Bystrzejewski, A. Gruneis, T. Gemming, W. Pompe, B. Buechner, T. Pichler
Catalyst volume to surface area constraints for nucleating carbon nanotubes, Journal of Physical Chemistry B, 111 (2007) 8234

M. H. Rümmeli, M. Löffler, C. Kramberger, F. Simon, F. Fueloep, O. Jost, R. Schoenfelder, A. Grüneis, T. Gemming, W. Pompe, B. Buechner, T. Pichler,
Isotope-engineered single-wall carbon nanotubes; A key material for magnetic studies, Journal of Physical Chemistry, 111 (2007) 4094

X. Lin, M. H. Rümmeli, T. Gemming, T. Pichler, D. Valentin, G. Ruani, C. Taliani
Single-wall carbon nanotubes prepared with different kinds of NiCo catalysts: Raman and optical spectrum analysis, Carbon 45 (2007) 196

M. H. Rümmeli, E. Borowiak-Palen, T. Gemming, T. Pichler, M. Knupfer, M. Kalbác, L. Dunsch, O. Jost, S. R. P. Silva, W. Pompe, B. Büchner
Novel catalysts, room temperature and the importance of oxygen for the synthesis of single wall carbon nanotubes. Nano Letters, 5, (2005) 1209-1215

Contact:

Dr. Mark H. Rümmeli

email: m.ruemmeli(at)ifw-dresden.de

phone: +49 (0)351 4659510

fax: +49 (0)351 4659440