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Issue 10, 2012
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Controlling anatase coating of diatom frustules by varying the binding layer

Jeremiah Toster,a  Catalin Harnagea,b  K. Swaminathan Iyer,a  Federico Roseib  and  Colin L. Raston*a 
Author affiliations

* Corresponding authors

a Centre for Strategic Nano-fabrication, School of Chemistry and Biochemistry, University Of Western Australia, Crawley, Australia
E-mail: colin.raston@uwa.edu.au
Fax: +08 6488 8683
Tel: +08 6488 3045

b Institut National de la Recherche Scientifique, Université du Quebec, 1650 Boul. Lionel Boulet, Varennes, Canada
E-mail: rosei@emt.inrs.ca
Fax: +1 (450) 929 8102
Tel: +1 (514) 228 8246

Abstract

Diatoms have ordered three dimensional porous exoskeletons (frustules) comprised primarily of amorphous silica which can be used as templates for materials applications. Hydrolysis of titanium(IV) isopropoxide (TIP) in the presence of surface bound poly(4-vinyl pyridine) or citric acid results in the formation of anatase on the surface after calcining at 450 °C, however as shown with atomic force microscopy (AFM), different morphologies are formed. Citric acid preferentially resulted in a thin film of anatase over the surface of the frustule whereas poly(4-vinyl pyridine) resulted in the formation of nano-particles of anatase (90–100 nm) on the surface.

Graphical abstract: Controlling anatase coating of diatom frustules by varying the binding layer

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Publication details

The article was received on 09 Dec 2011, accepted on 09 Mar 2012 and first published on 12 Mar 2012


Article type: Paper
DOI: 10.1039/C2CE06648C
Citation: CrystEngComm, 2012,14, 3446-3450
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    Controlling anatase coating of diatom frustules by varying the binding layer

    J. Toster, C. Harnagea, K. Swaminathan Iyer, F. Rosei and C. L. Raston, CrystEngComm, 2012, 14, 3446
    DOI: 10.1039/C2CE06648C

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