Deposition of bio-integration ceramic hydroxyapatite by pulsed-pressure MOCVD using a single liquid precursor solution

Susan P. Krumdieck, Benjamin P. Reyngoud, Anne D. Barnett, Deborah J. Clearwater, Richard M. Hartshorn, Catherine M. Bishop, Benjamin P. Redwood, Ellen L. Palmer

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Pulsed-pressure (PP) metal-organic(MO)CVD is used to deposit layers of calcium phosphate onto flat bio-medical grade titanium (Ti6Al4V) substrates. Inexpensive calcium lactate and trimethyl phosphate (TMP), combined in a methanol solution, forms the precursor. A range of precursor mixtures is studied by thermogravimetric analysis (TGA) to assess reaction pathways. The surface topography, morphology, composition, and crystallinity are studied over a range of deposition temperatures and precursor concentrations. The resulting films are analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy (RS), and micro-indentation. The films are continuous and the size of surface structures increases at higher temperatures and precursor concentration. The films consist of amorphous calcium phosphate in elemental Ca/P ratios similar to the standard bio-ceramic, hydroxyapatite (1.66).

Original languageEnglish
Pages (from-to)55-63
Number of pages9
JournalChemical Vapor Deposition
Volume16
Issue number1-3
DOIs
Publication statusPublished - Mar 2010

Keywords

  • Biomaterials
  • Calcium lactate
  • Hydroxyapatite
  • PP-MOCVD
  • Trimethyl phosphate

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces and Interfaces
  • Process Chemistry and Technology

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