Self-assembly of amorphous calcium carbonate microlens arrays

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Biological materials are often based on simple constituents and grown by the principle of self-assembly under ambient conditions. In particular, biomineralization approaches exploit efficient pathways of inorganic material synthesis. There is still a large gap between the complexity of natural systems and the practical utilization of bioinspired formation mechanisms. Here we describe a simple self-assembly route leading to a CaCO3 microlens array, somewhat reminiscent of the brittlestars' microlenses, with uniform size and focal length, by using a minimum number of components and equipment at ambient conditions. The formation mechanism of the amorphous CaCO3 microlens arrays was elucidated by confocal Raman spectroscopic imaging to be a two-step growth process mediated by the organic surfactant. CaCO3 microlens arrays are easy to fabricate, biocompatible and functional in amorphous or more stable crystalline forms. This shows that advanced optical materials can be generated by a simple mineral precipitation.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2012-03
Language
English
Article Type
Article
Keywords

SINGLE-CRYSTALS; INTEGRATED PORES; FABRICATION; BIOMINERALIZATION; HYDROGELS; MORPHOLOGIES; ALKANETHIOLS; STRATEGIES; MONOLAYERS; FEATURES

Citation

NATURE COMMUNICATIONS, v.3

ISSN
2041-1723
DOI
10.1038/ncomms1720
URI
http://hdl.handle.net/10203/101692
Appears in Collection
CBE-Journal Papers(저널논문)
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