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Related Experiment Videos

Characterization of hydroxyapatite by electron microscopy.

V Rodríguez-Lugo1, J Sanchez Hernández, Ma J Arellano-Jimenez

  • 1Centro Universitario de Vinculación, Benemérita Universidad Autónoma de Puebla, 29 Oriente 601-1 Col. Ladrillera de Benítez, C.P. Puebla 72520, México. lugo.ventura@cuv.buap.mx

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|May 8, 2007
PubMed
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Hydroxyapatite (HAp) was synthesized from brushite and starfish skeletons under hydrothermal conditions. This study details the HAp fiber formation and growth mechanism, offering insights into biomaterial synthesis.

Area of Science:

  • Biomaterials Science
  • Materials Chemistry
  • Geochemistry

Background:

  • Hydroxyapatite (HAp) is a crucial biomaterial with applications in bone regeneration and dentistry.
  • Biomimetic synthesis routes are explored to create HAp with controlled morphology and properties.
  • Marine organisms, like starfish, offer unique calcium carbonate structures that can serve as precursors.

Purpose of the Study:

  • To synthesize hydroxyapatite (HAp) using brushite and starfish (Mellita eduardobarrosoi sp. nov.) skeletons as precursors.
  • To investigate the effect of hydrothermal reaction time on HAp formation and characteristics.
  • To elucidate the growth mechanism of HAp fibers.

Main Methods:

  • Hydrothermal synthesis of HAp from brushite and magnesian calcite (starfish skeleton) at 200°C and 5.8 MPa.

Related Experiment Videos

  • Varying reaction times from 2 to 20 hours.
  • Characterization using scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (IR), and transmission electron microscopy (TEM).

    • Main Results:

    • Two distinct populations of HAp fibers were successfully synthesized.
    • HAp fibers exhibited lengths of 75 µm (1–13 µm diameter) and 5 µm (<0.5 µm diameter).
    • Increased HAp formation and a rising Ca/P ratio were observed with extended reaction times.

    Conclusions:

    • The study successfully produced hydroxyapatite (HAp) fibers via a biomimetic hydrothermal route.
    • Reaction time significantly influences HAp yield and its calcium-to-phosphorus ratio.
    • The findings provide a foundation for understanding HAp fiber growth mechanisms and optimizing synthesis for biomaterial applications.