Catalyst deposition and carbon nanotubes synthesis by laser-assisted chemical vapor deposition

J. Shi, Y. F. Lu, K. Tan, X. W. Wang

Research output: Contribution to conferencePaper

Abstract

Dispersed nickel sulphate (NiSO4) micro-clusters on Si substrates were disintegrated by pulsed excimer laser irradiation. At proper fluences, the NiSO4 clusters were pulverized into nanoparticles. The size ranges and distributions of fragments and/or particles were found to be dependent on excimer laser fluence and laser pulse number. Both CO2 laser chemical vapor deposition (LCVD) and hot-filament chemical vapor deposition (HFCVD) were used for catalytic growth of carbon nanofibers (CNFs)/carbon nanotubes (CNTs) using excimer laser irradiated NiSO4 catalysts. For catalysts prepared using excimer laser irradiation at fluences of 100 and 200 mJ/cm2, CNFs were dominant products. These CNFs were grown radially out of large NiSO^ clusters, forming dendritic CNFs bunches. For catalysts prepared using excimer laser irradiation at 300 mJ/cm2, multi-walled CNTs with highly-uniform diameters were obtained. Catalysts preparation with excimer laser disintegration of dispersed NiSO4 compound is a simple, ultrafast and in-air process.

Original languageEnglish (US)
Pages349-358
Number of pages10
DOIs
StatePublished - 2005
Event24th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2005 - Miami, FL, United States
Duration: Oct 31 2005Nov 3 2005

Conference

Conference24th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2005
CountryUnited States
CityMiami, FL
Period10/31/0511/3/05

ASJC Scopus subject areas

  • Engineering(all)

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    Shi, J., Lu, Y. F., Tan, K., & Wang, X. W. (2005). Catalyst deposition and carbon nanotubes synthesis by laser-assisted chemical vapor deposition. 349-358. Paper presented at 24th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2005, Miami, FL, United States. https://doi.org/10.2351/1.5060559