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Issue 3, 2006
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Biomimetic silicification of 3D polyamine-rich scaffolds assembled by direct ink writing

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Abstract

We report a method for creating synthetic diatom frustules via the biomimetic silicification of polyamine-rich scaffolds assembled by direct ink writing (DIW) [G. M. Gratson, M. Xu and J. A. Lewis, Nature, 2004, 428, 386, ]. A concentrated polyamine-rich ink is robotically deposited in a complex 3D pattern that mimics the shape of naturally occurring diatom frustules, Triceratium favus Ehrenberg (triangular-shaped) and Arachnoidiscus ehrenbergii (web-shaped). Upon exposing these scaffolds to silicic acid under ambient conditions, silica formation occurs in a shape-preserving fashion. Our method yields 3D inorganic–organic hybrids structures that may find potential application as templates for photonic materials, novel membranes, or catalyst supports.

Graphical abstract: Biomimetic silicification of 3D polyamine-rich scaffolds assembled by direct ink writing

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Publication details

The article was received on 06 Dec 2005, accepted on 23 Jan 2006 and first published on 06 Feb 2006


Article type: Communication
DOI: 10.1039/B517278K
Citation: Soft Matter, 2006,2, 205-209
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    Biomimetic silicification of 3D polyamine-rich scaffolds assembled by direct ink writing

    M. Xu, G. M. Gratson, E. B. Duoss, R. F. Shepherd and J. A. Lewis, Soft Matter, 2006, 2, 205
    DOI: 10.1039/B517278K

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