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

 

 

Carbon Nanotubes I

Metal Catalyst Synthesis

Catalyst volume to surface area model.

Three-dimensional plot showing the mean diameter dependence on oven temperature and Ni/Co ratio. (b) Twodimensional plot of mean diameter vs oven temperature for pure Ni (lower sigmoid curve), pure Co (linear curve), and Ni/Co (1:1) (upper sigmoid curve). (c) Three-dimensional plot of relative yield against oven temperature and Ni/Co ratio. (d) Twodimensional plot of relative yield. From bottom up: pure Co, pure Ni, Ni/Co (1:1). (e) Four-dimensional plot of G/D ratio dependence on catalyst Ni/Co ratio and oven temperature. The shading corresponds to yield. (f) Two-dimensional plot illustrating the G/D change with temperature and catalyst ratio. From bottom up: pure Co, pure Ni, Ni/Co (1:1). Curves are a guide to the eye.

(a, c) TEM micrographs of (oxidized) Fe nanoparticles with median diameters of 5 and 10 nm, respectively. (b, d) Corresponding TEM micrographs of CNT grown from these particles. The particle size or CNT diameter distributions are shown as insets.

Vertically aligned forests of CNTs

Horizontal growth of CNTs on quartz.

S. Tetali, M. Zaka, R. Schoenfelder, A. Bachmatiuk, F. Boerrnert, I. Ibrahim, J.H. Lin, G. Cuniberti, J.H. Warner, B. Buechner, M.H. Ruemmeli
Unravelling the mechanisms behind mixed catalysts for the high yield production of single-walled carbon nanotubes, ACS Nano 3 (2009) Nr. 12, S. 3839-3844 URL

M. Bystrzejewski, M.H. Ruemmeli, H. Lange, A. Huczko, P. Baranowski, T. Gemming, T. Pichler
Single-walled carbon nanotubes synthesis: A direct comparison of laser ablation and carbon arc routes, Journal of Nanoscience and Nanotechnology 8 (2008) Nr. 11, S. 1-9

M. Bystrzejewski, R. Schoenfelder, G. Cuniberti, H. Lange, A. Huczko, T. Gemming, T. Pichler, B. Buechner, M. Ruemmeli
Exposing multiple roles of H2O in high-temperature enhanced carbon nanotube synthesis, Chemistry of Materials 20 (2008), S. 6586-6588 URL

F. Schaeffel, C. Kramberger, M.H. Ruemmeli, D. Grimm, E. Mohn, T. Gemming, T. Pichler, B. Rellinghaus, B. Buechner, L. Schultz
Nanoengineered catalyst particles as a key for tailor-made carbon nanotubes, Chemistry of Materials 19 (2007) Nr. 20, S. 5006-5009 URL

M.H. Ruemmeli, M. Loeffler, C. Kramberger, F. Simon, F. Fueloep, O. Jost, R. Schoenfelder, A. Grueneis, T. Gemming, W. Pompe, B. Buechner, T. PichlerIsotope-engineered single-wall carbon nanotubes; A key material for magnetic studies, The Journal of Physical Chemistry C 111 (2007) Nr. 11, S. 4094-4098 URL

M.H. Ruemmeli, C. Kramberger, M. Loeffler, O. Jost, M. Bystrzejewski, A. Grueneis, T. Gemming, W. Pompe, B. Buechner, T. Pichler
Catalyst volume to surface area constraints for nucleating carbon nanotubes, The Journal of Physical Chemistry B 111 (2007) Nr. 28, S. 8234-8241 URL