Silaffin primary structure and its effects on the precipitation morphology of titanium dioxide

Inorganic oxides exhibit numerous applications influenced by particle size and morphology. While industrial methods for forming oxides involve harsh conditions, nature has the ability to form intricate structures of silicon dioxide (silica) using small peptides and polyamines under environmentally f...

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Bibliographic Details
Published in:Journal of materials research 2016-05, Vol.31 (10), p.1373-1382
Main Authors: Stote, Robert E., Filocamo, Shaun F., Lum, June S.
Format: Article
Language:English
Subjects:
Amino acids
Analysis
Applied and Technical Physics
Biomaterials
Biomineralization and Biomimetics Article
Environmental management
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Metal oxides
Morphology
Nanotechnology
Oxides
Peptides
Plankton
Polyamines
Precipitates
Precipitation
Residues
Scanning electron microscopy
Silica
Silicon dioxide
Spectrum analysis
Studies
Titanium
Titanium dioxide
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Summary:Inorganic oxides exhibit numerous applications influenced by particle size and morphology. While industrial methods for forming oxides involve harsh conditions, nature has the ability to form intricate structures of silicon dioxide (silica) using small peptides and polyamines under environmentally friendly conditions. Recent research has demonstrated that these biomaterials will precipitate other inorganic oxides, such as titanium dioxide (titania). Using the diatom-derived R5 peptide, new peptides with systematic changes (e.g., truncation and substitution) in the R5 primary structure were surveyed for reactivities and the impact on the morphology of the titania. The results demonstrated that (i) basic residues are vital to initiating the reaction, and a minimum local concentration is necessary to sustain the precipitation, (ii) residues containing hydroxyl side chains are important to imparting morphological control on the precipitate, and (iii) buffer conditions can dramatically alter both precipitation and morphology.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2016.165