Low-Temperature, Controlled Synthesis of Carbon Nanotubes


  • I am grateful to Prof. Richard Smalley for useful discussions, particularly on Ref. 14, and to AFRL/ML, Wright Brothers Institute, Dayton Development Colations, and the University of Dayton for a WBI Endowed Chair Professorship in Nanomaterials.


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Multi-walled carbon nanotubes with controllable structures are produced at a low temperature (175 °C) by using CCl4 as the precursor for pyrolytic growth in a supercritical carbon dioxide medium, in the presence of iron catalysts encapsulated in polypropyleneimine dendrimers (see picture). This work may lead to a large-scale, cost-effective synthesis of carbon nanotubes for practical applications.