1 Effects of Annealing Effects of Annealing • SEM surface morphology SEM surface morphology of porous alumina of porous alumina substrates sputtered substrates sputtered with 20 nm Ni. with 20 nm Ni. – (a) As sputtered smooth (a) As sputtered smooth surface before annealing. surface before annealing. – (b) After annealing at (b) After annealing at 500 500 o C under H C under H 2 for two for two hours. hours. – The continuous nickel The continuous nickel thin film transformed to thin film transformed to uniformly distributed uniformly distributed nano-sized particles. nano-sized particles. (a ) (b )
Effects of Annealing
Jan 01, 2016
(a). (b). Effects of Annealing. SEM surface morphology of porous alumina substrates sputtered with 20 nm Ni. (a) As sputtered smooth surface before annealing. (b) After annealing at 500 o C under H 2 for two hours. - PowerPoint PPT Presentation
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11
Effects of AnnealingEffects of Annealing
• SEM surface morphology SEM surface morphology of porous alumina of porous alumina substrates sputtered with substrates sputtered with 20 nm Ni. 20 nm Ni. – (a) As sputtered smooth (a) As sputtered smooth
surface before annealing. surface before annealing. – (b) After annealing at 500(b) After annealing at 500ooC C
under Hunder H22 for two hours. for two hours.
– The continuous nickel thin The continuous nickel thin film transformed to film transformed to uniformly distributed nano-uniformly distributed nano-sized particles. sized particles.
(a)
(b)
22
Effects of Annealing (cont.)Effects of Annealing (cont.)(c) (d)
(e)
(c), (d) CNTs grown without annealing(e) CNTs grown after annealing
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