Crystallization of calcite spherules around designer nuclei

Angewandte Chemie - International Edition

Volumn 37, Issue 21, 1998, Pages 3044-3047

  Küther, Jörg ^a   Seshadri, Ram ^a   Tremel, Wolfgang ^a  

^a JOHANNES GUTENBERG UNIVERSITY   (Germany)

Author keywords

Biomineralization; Calcium; Colloids; Crystal growth; Monolayers

Indexed keywords

CALCIUM; CALCIUM CARBONATE; PHENOL DERIVATIVE; STRONTIUM;

ARTICLE; CRYSTALLIZATION; CRYSTALLOGRAPHY; MINERALIZATION; X RAY DIFFRACTION;

EID: 0042096626     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(19981116)37:21<3044::AID-ANIE3044>3.0.CO;2-0     Document Type: Article

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21. When the crystallizations are performed on p-sulfanylphenol SAMs on gold/glass substrates rather than on colloids, no modification other than calcite is observed. However, when the pH value is lowered to about 10.5, the aragonite :calcite ratio of crystals deposited on p-sulfanylphenol SAMs on gold/glass is about 40:60 at 22 °C and 85:15 at 45°C, as determined from the Rietveld refinement of powder X-ray profiles. These are the highest aragonite weight fractions that we have been able to obtain at 22°C on SAMs of simple thiols. We are now attempting to prepare colloids coated with thiols that permit dissolution of the colloids in water at neutral pH values in the hope of inducing aragonite.
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