Advanced Materials

Three-Dimensional Internal Order in Multiwalled Carbon Nanotubes Grown by Chemical Vapor Deposition (Adv. Mater. 6/2005)



Unprecedented levels of internal order are obtained in multiwalled carbon nanotubes grown by chemical vapor deposition with a nitrogen-doping level of 3% in work reported by Windle and co-workers on p. 760. Not only is each of the tubular layers of the same orientation (chirality), but they also appear to be in three-dimensional crystallographic register with one another as shown by the hkl reflections on the cover. The tubes are also straighter and thicker than pure carbon equivalents. The layers are either pure zigzag or pure armchair with spacings close to that of graphite.