PLD prepared bioactive BaTiO3 films on TiNb implants

Mater Sci Eng C Mater Biol Appl. 2017 Jan 1;70(Pt 1):334-339. doi: 10.1016/j.msec.2016.08.072. Epub 2016 Sep 6.

Abstract

BaTiO3 (BTO) layers were deposited by pulsed laser deposition (PLD) on TiNb, Pt/TiNb, Si (100), and fused silica substrates using various deposition conditions. Polycrystalline BTO with sizes of crystallites in the range from 90nm to 160nm was obtained at elevated substrate temperatures of (600°C-700°C). With increasing deposition temperature above 700°C the formation of unwanted rutile phase prevented the growth of perovskite ferroelectric BTO. Concurrently, with decreasing substrate temperature below 500°C, amorphous films were formed. Post-deposition annealing of the amorphous deposits allowed obtaining perovskite BTO. Using a very thin Pt interlayer between the BTO films and TiNb substrate enabled high-temperature growth of preferentially oriented BTO. Raman spectroscopy and electrical characterization indicated polar ferroelectric behaviour of the BTO films.

Keywords: BaTiO(3); Ferroelectricity; Implants; PLD; Thin films; TiNb.

MeSH terms

  • Alloys / chemistry*
  • Barium Compounds / chemistry*
  • Biocompatible Materials / chemistry*
  • Electricity
  • Electrodes
  • Lasers*
  • Microscopy, Electron, Scanning
  • Niobium / chemistry*
  • Prostheses and Implants*
  • Silicon Dioxide / chemistry
  • Spectrum Analysis, Raman
  • Titanium / chemistry*
  • X-Ray Diffraction

Substances

  • Alloys
  • Barium Compounds
  • Biocompatible Materials
  • Niobium
  • barium titanate(IV)
  • Silicon Dioxide
  • Titanium