Complex-Shaped Microcomponents by the Reactive Conversion of Biological Templates
Abstract
This project has been aimed at: 1) identifying gas/solid reaction conditions for converting biologically-derived micro/nanotemplates into other oxides without a loss of the starting 3-D shape and fine features, and 2) evaluating the nanochemical/nanostructural evolution during such reactive conversion. The most significant accomplishments have been: 1) Development of an oxidation-reduction reaction process for converting biosilica-based micro/nanoassemblies into MgO nanoparticle structures with a preservation of the starting 3-D shape and fine features at temperatures as low as 700 deg C; 2) Development of a two-Step oxidation-reduction reaction process for converting biosilica-based micro/nanoassemblies into CaO nanoparticle structures with a preservation of the starting 3-D shape and fine features at temperatures as low as 1000 deg C; 3) Development of a two-step metathetic reaction process for converting biosilica-based micro/nanoassemblies into TiO2 nanoparticle structures with a preservation of the starting 3-D shape and fine features at temperatures as low as 350 deg C; 4) Identification of novel reaction paths accessed during conversion of biosilica structures into magnesia (via formation of forsterite as an intermediate product) and titania (via formation of the intermediate compound, titanium oxyfluoride); 5) Identification of peptides that promote room-temperature formation of germania nanoparticle networks.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 27, 2004
- Accession Number
- ADA424129
Entities
People
- Kenneth H. Sandhage
- Morley Stone
- Rajesh R Naik
Organizations
- Georgia Tech