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Whiskers (Graphite Whiskers)

by Editor1 last modified October 28, 2006 - 00:24

Carbon nanocones, whiskers, and larger polygonized nanotubes, called graphite polyhedral crystals, are a whole new class of carbon nanomaterials; which, along with vapor-grown carbon fibers, can be placed between graphite and fullerene families of carbon. They are elongated and, typically, axially symmetric structures.

Chapter 3 Graphite Whiskers, Cones, and Polyhedral Crystals
Nanotubes and Nanofibers
Svetlana Dimovski and Yury Gogotsi

The common features of carbon whiskers, cones, scrolls, and graphite polyhedral crystals, besides their chemistry and the graphitic nature of their bonds, are their morphology and the high length-to-diameter aspect ratio, which places them between graphite and carbon nanotube materials.

Graphite whiskers are the first known nonplanar graphitic structures that were obtained through a controlled preparation. Bacon succeeded in growing high-strength graphite whiskers on carbon electrodes using a DC arc under an argon pressure of 92 atm.
Whiskers and filaments of graphite have also been observed to form during pyrolytic deposition of various hydrocarbon materials. Whisker growth during pyrolytic deposition process is generally considered as being catalyzed by metals.