Nano Archive

Carbon whisker formation under fast particle irradiation

Salah, H and Adjrad, A (2007) Carbon whisker formation under fast particle irradiation. Surface and Coatings Technology, 201 (19-20). 8560 - 8563.

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Official URL: http://www.sciencedirect.com/science/article/B6TVV...

Abstract

The well known synthesis methods for carbon whiskers and carbon nano-tubes are dc arc discharge, laser ablation and catalytic processes. The configurations obtained are strongly influenced by the working conditions such as temperature, pressure and patterning substrates. In the present contribution, we report a simple process where carbon whiskers were produced by MeV D+ irradiated graphite. Scanning probe microscopy and X-ray diffraction methods were used to analyze the samples which consist of polished silicon used to collect the ejected matter. The results of the analysis revealed the presence of carbon nanoparticles embedded in a highly heated environment. SEM images clearly illustrate that these materials have highly complex structures. Initially, the carbon whiskers form well-separated spheroidal particles and subsequently transform into coral-like structures through step by step deposition. It is believed that the chaotic environment associated with the irradiation leads to the complex structures obtained. A scenario to explain such unexpected results is proposed.

Item Type:Article
Additional Information:SMMIB 2005, 14th International Conference on Surface Modification of Materials by Ion Beams
Uncontrolled Keywords:Irradiation; Ion beams; Carbon whiskers; Electrical discharge
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:3959
Deposited By:SPI
Deposited On:08 Apr 2009 11:14
Last Modified:08 Apr 2009 11:14

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