Elasticity and bioactivity of porous silicon films

Peckham, Jordan (2011) Elasticity and bioactivity of porous silicon films. Masters thesis, Memorial University of Newfoundland.

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Abstract

Porous silicon films with a variety of porosities pore geometries, and pore network morphologies were formed by electrochemical anodization of crystalline silicon in hydrofluoric acid-based electrolytes. The elastic properties of microporous films formed on p⁻ type substrates and mesoporous films formed on n⁺ type substrates were characterized using Brillouin light scattering spectroscopy. Bioactivity of micro, meso, and macroporous silicon was assessed by monitoring the mass of samples over time while immersed in a simulated body fluid with a chemical composition that mimics that of human blood plasma. Scanning electron microscopy and energy dispersive x-ray studies reveal the presence of the bone-like mineral hydroxyapatite on some of the simulated body fluid-treated samples. Collectively, these studies provide a foundation for the use of porous silicon as a bioactive and elastically-adjustable bone-building matrix.

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