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Science 6 December 1996:
Vol. 274. no. 5293, pp. 1585 - 0
DOI: 10.1126/science.274.5293.1585d
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This Week in Science

Carbon nanotubes consist of concentric shells of graphitic sheets and have diameters in the nanometer range. Controlled production of the nanotubes, both with regard to their length and diameter and their alignment, is important both for potential applications and for detailed characterization of their properties. Li et al. (p. 1701) report a method for producing aligned nanotubes of well-defined length and diameter by using iron particles in mesoporous silica as the catalysts for growing the tubes. Well-aligned arrays of tubes with diameters of 30 nanometers and lengths of 50 micrometers can be grown and can be removed from the substrate to retain aligned tubes.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)