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Nanostructures synthesis by femtosecond laser ablation of glasses

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3 Author(s)
Vipparty, D. ; Department of Aerospace Engineering, Ryerson University, Toronto, Ontario M5B 2K3, Canada ; Tan, B. ; Venkatakrishnan, K.

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In this article, we investigate the variations in ablation dynamics that result in diverse nanostructures on SiO2 based glass samples. A three-dimensional fibrous nanoparticle agglomerate was observed on sodalime glass when exposed to femtosecond laser irradiation. The fused nanoparticles have diameters ranging from 30 nm to 70 nm. Long continuous nanofibers of extremely high aspect ratio (certain fibers up to 100 000:1) were obtained by exposing silica glass surface to femtosecond laser irradiation at MHz repetition rate in air. A nanostructure assembly comprising of nanofiber and nanoparticle agglomerates was also observed by ablating silica glass. From our experimental analysis, it was determined that variation in bandgap and material composition alters ablation dynamics and dictates the response of glass to femtosecond laser irradiation, ultimately leading to the formation of structures with varying morphology on silica and sodalime glass. The possible underlying mechanisms that produce such nanostructures on glass specimens have also been explored.

Published in:

Journal of Applied Physics  (Volume:112 ,  Issue: 7 )

Date of Publication:

Oct 2012

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