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Osmotic contribution to the flow-driven tube formation of copper–phosphate and copper–silicate chemical gardens

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Abstract

We have produced hollow copper-containing precipitate tubes using a flow-injection technique, and characterized their linear and volume growth. It is shown that the ratio of the volume increase rate to that of pumping is constant independent of the chemical composition. It is also found that osmosis significantly contributes to the tube growth, since the inward flux of chemical species dominates during the precipitate pattern formation. The asymmetric hydrodynamic field coupled with the inherent concentration and pH gradients results in different particle morphology on the two sides of the precipitate membrane. While the tubes have a smooth outer surface, the inner walls are covered with nanoflowers for copper phosphate and with nanoballs for copper silicate.

Graphical abstract: Osmotic contribution to the flow-driven tube formation of copper–phosphate and copper–silicate chemical gardens

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Publication details

The article was received on 11 Dec 2017, accepted on 23 Jan 2018 and first published on 23 Jan 2018


Article type: Paper
DOI: 10.1039/C7CP08282G
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Osmotic contribution to the flow-driven tube formation of copper–phosphate and copper–silicate chemical gardens

    E. Rauscher, G. Schuszter, B. Bohner, Á. Tóth and D. Horváth, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C7CP08282G

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