Show simple item record

Authordc.contributor.authorRao, Ashit 
Authordc.contributor.authorFernández, María S. 
Authordc.contributor.authorBerg, John K. 
Authordc.contributor.authorSánchez, Marianela 
Authordc.contributor.authorDrechsler, Markus 
Authordc.contributor.authorNeira Carrillo, Andrónico 
Authordc.contributor.authorArias Bautista, José 
Authordc.contributor.authorGebauer, Denis 
Authordc.contributor.authorCoelfen, Helmut 
Admission datedc.date.accessioned2016-07-01T19:48:41Z
Available datedc.date.available2016-07-01T19:48:41Z
Publication datedc.date.issued2016
Cita de ítemdc.identifier.citationCryst. Growth Des. 2016, 16, 1349−1359en_US
Identifierdc.identifier.otherDOI: 10.1021/acs.cgd.5b01488
Identifierdc.identifier.urihttp://repositorio.uchile.cl/handle/2250/139378
General notedc.descriptionArtículo de publicación ISIen_US
Abstractdc.description.abstractFrom recent studies on bone and shell formation, the importance of polysaccharides in biomineralization processes is gradually being recognized. Through ion-complexation and self-assembly properties, such macromolecules have remarkable effects on mineralization. However, their influences on the different regimes of crystallization including the interactions with precursor species are unclear. The present study therefore addresses calcium carbonate mineralization in the presence of alginates, a class of linear copolymeric saccharides composed of beta-1,4 linked D-mannuronic and L-guluronic acid. During mineralization, this biopolymer is found to exert pH-dependent control over mineralization pathways in terms of the stability of prenucleation dusters, inhibitory effect toward nucleation and initially formed postnucleation products. Remarkably in the presence of this macromolecular additive; either amorphous or crystalline vaterite particles can be selectively nucleated in a pH-dependent manner. This is validated by electron microscopy wherein vaterite particles are intimately associated with alginate assemblies after nucleation at pH 9.75. At lower pH, aggregates, of amorphous particles are formed. Thus, in addition to the general focus on biochemical properties of additives, solution pH, a physiologically fundamental parameter significantly alters the scheme of mineralization.en_US
Patrocinadordc.description.sponsorshipChilean Council for Science and Technology (CONICYT); CONICYT/DAAD; Program U-Redes, Vice-presidency of Research and Development, University of Chileen_US
Lenguagedc.language.isoenen_US
Publisherdc.publisherAMER CHEMICAL SOCen_US
Type of licensedc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
Keywordsdc.subjectShellformationen_US
Keywordsdc.subjectElectron-microscopyen_US
Keywordsdc.subjectOriented attachmenten_US
Keywordsdc.subjectprenucleation clustersen_US
Keywordsdc.subjecttransformation mechanismen_US
Keywordsdc.subjectNonclassical crystallizationen_US
Keywordsdc.subjectPrecursor phaseen_US
Keywordsdc.subjectX-ray-diffractionen_US
Keywordsdc.subjectHydrophilic block-copolymersen_US
Keywordsdc.subjectEgg-box modelen_US
Títulodc.titlepH-Dependent Schemes of Calcium Carbonate Formation in the Presence of Alginatesen_US
Document typedc.typeArtículo de revistaen_US


Files in this item

Icon

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 Chile
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 Chile