Biocompatible film deposition by using Nd:YAG pulsed laser

J. Beltrano*, L. Torrisi, D. Margarone

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A Nd:YAG laser operating at the fundamental wavelength (1064 nm) and at the second harmonic (532 nm), with 9 ns pulse duration, 100-900 mJ pulse energy, and 30 Hz repetition rate mode, was employed to ablate in vacuum (10 -6 mbar) biomaterial targets and to deposit thin films on substrate backings. Titanium target was ablated at the fundamental frequency and deposited on near-Si substrates. The ablation yield increases with the laser fluence and at 40 J/cm 2 the ablation yield for titanium is 1.2×10 16 atoms/pulse. Thin film of titanium was deposited on silicon substrates placed at different distance and angles with respect to the target and analysed with different surface techniques (optical microscopy, scanning electron spectrosopy (SEM), and surface profile). Hydroxyapatite (HA) target was ablated to the second harmonic and thin films were deposited on Ti and Si substrates. The ablation yield at a laser fluence of 10 J/cm 2 is about 5×10 14 HA molecules/pulse. Thin film of HA, deposited on silicon substrates placed at different distance and angles with respect to the target, was analysed with different surface techniques (optical microscopy, SEM, and Raman spectroscopy). Metallic films show high uniformity and absence of grains, whereas the bio-ceramic film shows a large grain size distribution. Both films found special application in the field of biomaterial coverage.

Original languageEnglish
Pages (from-to)545-552
Number of pages8
JournalRadiation Effects and Defects in Solids
Volume160
Issue number10-12
DOIs
Publication statusPublished - Oct 2005
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

  • Biomaterial
  • Hydroxyapatite
  • Pulsed laser deposition

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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