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Effect of Oxygen on the Textured Diamond Growth over Nickel Substrates
Published online by Cambridge University Press: 21 February 2011
Abstract
Microwave plasma has been used to grow diamond films using CH4 and H2 over nickel substrates. Nucleation of the diamond has been achieved by manual scratching and ultrasonic agitation of the substrates. The substrate was left in the H 2 microwave plasma to remove any oxide film present prior to the diamond growth. According to SEM the morphology of the grown films was (100) textured over the entire surface. Our interest is to study the effect of O2 on the growth rate and the morphology of as-deposited diamond films. Infact, O2 has a tendency to preferentially etch the diamond (etch rate: 111 > 110 >100). Injection of O2 into the reaction mixture could enhance the 100 texture further. Raman analysis confirms the deposited films as diamond. Effect of O2 on the nature of the films and the characterization of as-deposited films is described.
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- Copyright © Materials Research Society 1994