Cross sectional TEM investigation of Ni-catalysed carbon nanotube films grown by plasma enhanced CVD
Artikel i övriga tidskrifter, 2005

Nickel-catalysed multiwall carbon nanotubes synthesized by plasma-enhanced chemical vapour deposition on a silicon substrate with acetylene and ammonia at 700 °C have been characterized by high-resolution and analytical transmission electron microscopy. The nucleation of the carbon nanotubes occurs as a consequence of the carburization and dusting of supported preformed nickel- and silicon-rich particles. This process yields disintegrated silicon-containing nickel particles dispersed in dome-shaped carbon islands adherent to the substrate. The particles act as catalysts for tube growth, resulting in aligned multiwall carbon nanotubes with a bamboo-like structure anchored to the dome-shaped carbon islands. The bottom part of the carbon islands contains bundles of graphene sheets orientated parallel to the substrate. The nanotubes are capped with fcc nickel particles containing dissolved silicon. Most of these particles have a conical shape orientated with a <110> direction along the tube growth axis, and with {110} and {111} planes as exposed faces.

carbon nanotubes nanofibres

Författare

Yiming Yao

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Lena Falk

Chalmers, Teknisk fysik

Raluca Elena Morjan

Chalmers, Institutionen för experimentell fysik, Atomfysik

Oleg Nerushev

Göteborgs universitet

Eleanor E B Campbell

Göteborgs universitet

Journal of Microscopy

0022-2720 (ISSN) 1365-2818 (eISSN)

Vol. 219 69-75

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1111/j.1365-2818.2005.01494.x