Derivatized porous silicon

Details Derivatized porous silicon Derivatized porous silicon

A - Human Necessities

61

L

A61L 27/02 (2006.01) A61L 31/02 (2006.01)

Patent

CA 2368679

Biomaterial comprising derivatized porous silicon is described. Derivatization of the porous silicon has been found to increase its stability. The porous silicon is preferably derivatized by a technique that does not involve oxidation of the silicon, e.g. by hydrosilylation. The derivatized porous silicon is stable to boiling in aerated water for preferably at least two hours. The derivatized porous silicon is preferably at least substantially stable to boiling in aerated basic solutions of aqueous KOH (pH 10) and solutions of 25 % EtOH/75 % aqueous KOH (pH 10) for one hour. The corrosion rate of the derivatized porous silicon material in simultated human plasma, is a factor of at least two orders of magnitude lower than underivatized porous silicon. The porosity of the derivatized porous silicon is preferably at least 5 %. Devices comprising the derivatized porous silicon are also described. These include immunoisolation devices, biobattery devices, and optical devices.

L'invention concerne du silicium poreux dérivé, et le biomatériau comprenant ledit silicium poreux dérivé. On a découvert que la dérivation du silicium poreux augmentait sa stabilité. Le silicium poreux est, de préférence, dérivé à l'aide d'une technique n'impliquant pas l'oxydation du silicium, par exemple, par hydrosilylation. Il est stable à l'ébullition dans de l'eau gazeuse, de préférence, pendant au moins deux heures. Il est, de préférence, au moins sensiblement stable à l'ébullition dans des solutions basiques gazeuses de KOH (pH 10) aqueux, et dans des solutions renfermant 25 % de EtOH et 75 % de KOH (pH 10) aqueux, pendant une heure. Le taux de corrosion du matériau de silicium poreux dérivé dans du plasma humain simulé, est de préférence, d'au moins deux fois moins important que dans le silicium poreux non dérivé. La porosité du silicium poreux dérivé est, de préférence, d'au moins 5 %. L'invention concerne également des dispositifs comprenant ledit silicium poreux dérivé, notamment des dispositifs d'immunoisolation, des dispositifs de batterie, et des dispositifs optiques.

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