Bram Cantaert, Yi-Yeoun Kim, Henning Ludwig, Fabio Nudelman, Nico A. J. M. Sommerdijk and Fiona C. Meldrum Think Positive: Phase Separation Enables a Positively Charged Additive to Induce Dramatic Changes in Calcium Carbonate Morphology Advanced Functional Materials 22
Taking inspiration from biomineralization, acidic additives are widely used to control calcium carbonate precipitation. It is shown that the positively charged additive poly(allylamine hydrochloride) (PAH) is also highly effective and it can direct the growth of thin films and fibers of CaCO3. These results are attributed to microphase separation of PAH in the presence of carbonate ions.
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