CVD of CNFs, MW-, DW-, and SW-Nanotubes

Carbon nanotubes (CNTs), a material with unique electrical, mechanical, thermal, and chemical properties, have attracted much attention for various technological applications such as functional components for electronic nanodevices, as additives for polymer composites, and as electrode materials.

Depending on the number of tube walls, CNTs can be assigned to single-walled (SW), double-walled (DW), and multi-walled (MW) nanotubes. Carbon nanofibers (CNFs) of the type "herringbone" and "platelet" (diameter >100 nm) do show interesting chemical and physical properties, they are  promising candidates for additions to different composite materials.

The catalytic CVD using metal particles as catalyst is the mostly used method for the CNT synthesis with high controllability of the NT structure and diameter and quite versatile for scaled-up production of CNTs.

The CVD group of the IFF is engaged in synthesis and characterization of carbon nanostructures as bulk, layer, or in individual materials, using thermal catalytic and plasma enhanced CVD methods.  The topics are focussed on investigation of growth  mechanism, structure, and catalytic effects with the aim to improve the material regarding uniformity of structure, diameter, and length as well as impurity content.

Activities:

1. Synthesis of CNTs with controllable diameter range using the "fixed bed" method: 

2. Synthesis of CNTs with defined narrow diameter distribution

using the "aerosol" CVD

3. Synthesis of type-pure CNFs (herringbones, platelets) by fixed-bed CVD

CNF/herringbones
CNF/platelets

For more information don't hesitate to contact.

Contacts:

Dr. Albrecht Leonhardt
Department 'Chemical Vapor Deposition'
Institute for Solid State Research (IFF)
IFW Dresden
D-01171 Dresden, Germany

Phone: +49-351-4659-299
Fax: +49-351-4659-440

Email: a.leonhardt@ifw-dresden.de

See also:

Initial page of department CVD