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Formation of diamond-like carbon films and carbon foam by ultrafast laser ablation

Published online by Cambridge University Press:  07 March 2001

E.G. GAMALY ,
A.V. RODE  and
B. LUTHER-DAVIES
E.G. GAMALY
Affiliation:
Departamento de Fisica, Universidad Autonoma Metropolitana-Iztapalapa, Apartado Postal 55-534, 09340, Mexico D.F., Mexico
A.V. RODE
Affiliation:
Laser Physics Centre, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, Australia
B. LUTHER-DAVIES
Affiliation:
Laser Physics Centre, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, Australia
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Abstract

The ultra-fast ablation of a graphite target using high repetition rate Nd:YAG lasers allows us to deposit two distinctly different carbonaceous structures, depending on the ambient Ar pressure: a diamond-like carbon film with the surface finish down to atomic level at a pressure below 0.1 Torr, and a fractal C nanofoam with air-like density and diamond-like resistivity at higher pressure. The experimental characterization of vapors and carbonaceous materials produced is presented and compared to the theoretical predictions. The analysis of the formation conditions leads to the qualitative understanding of the formation mechanism for both C structures.

Type
ZABABAKHIN SPECIAL PAPERS
Information
Laser and Particle Beams , Volume 18 , Issue 2 , April 2000 , pp. 245 - 254
Copyright
© 2000 Cambridge University Press

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