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In Situ Polypeptide Directed Silica Biomineralization

Published online by Cambridge University Press:  17 March 2011

Diana D. Glawe ,
Francisco RodrÍguez ,
Morley O. Stone  and
Rajesh R. Naik
Diana D. Glawe
Affiliation:
Department of Engineering Science, Trinity University, San Antonio, TX, USA
Francisco RodrÍguez
Affiliation:
Materials Directorate, Air Force Research Laboratories, Wright-Patterson AFB, OH, USA
Morley O. Stone
Affiliation:
Materials Directorate, Air Force Research Laboratories, Wright-Patterson AFB, OH, USA
Rajesh R. Naik
Affiliation:
Materials Directorate, Air Force Research Laboratories, Wright-Patterson AFB, OH, USA
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Abstract

Silica-precipitating polypeptides were deposited onto an indium tin oxide (ITO) surface from bulk solution with and without the assistance of an externally applied electrostatic field. Exposure of the peptide-coated surface to an alkoxide precursor produced biosilica structures that were securely attached to the electrode surface. The silica morphologies resulting from the test cases using an externally applied electrostatic field during peptide deposition were distinct from the morphologies resulting from cases without an applied field. The silica morphologies observed on the ITO surface were different from the usual silica morphology resulting from static conditions. Peptide size was also shown to influence resulting biosilica morphology. The experimental results presented herein demonstrate the feasibility of creating biosilica nanostructures with controlled morphologies using polypeptides in vitro.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 823: Symposium W – Biological and Bioinspired Materials and Devices , 2004 , W4.17
Copyright
Copyright © Materials Research Society 2004

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