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Silica nanoparticle aggregation in calcite replacement reactions

Natural nanoparticles are fundamental building blocks of Earth’s bio- and geosphere. Amorphous silica nanoparticles are ubiquitous in nature, but fundamental knowledge of their interaction mechanisms and role in mineral replacement reactions is limited. Here we show how silica nanoparticles replace...

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Autores principales: Liesegang, Moritz, Milke, Ralf, Kranz, Christine, Neusser, Gregor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5673956/
https://www.ncbi.nlm.nih.gov/pubmed/29109392
http://dx.doi.org/10.1038/s41598-017-06458-8
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author Liesegang, Moritz
Milke, Ralf
Kranz, Christine
Neusser, Gregor
author_facet Liesegang, Moritz
Milke, Ralf
Kranz, Christine
Neusser, Gregor
author_sort Liesegang, Moritz
collection PubMed
description Natural nanoparticles are fundamental building blocks of Earth’s bio- and geosphere. Amorphous silica nanoparticles are ubiquitous in nature, but fundamental knowledge of their interaction mechanisms and role in mineral replacement reactions is limited. Here we show how silica nanoparticles replace Cretaceous calcite bivalve shells in a volume- and texture-preserving process. Electron tomography reveals that mineral replacement transfers calcite crystallographic orientations to twinned photonic crystals composed of face-centered cubic silica sphere stacks. During the face-specific replacement process, silica nanoparticles continuously nucleate, aggregate, and form a lattice of uniform spheres parallel to calcite low-energy facets. We explain the replacement process with a new model that unifies recently proposed, probably universal mechanisms of interface-coupled dissolution-precipitation and aggregation-based crystallization; both key mechanisms in geological processes and nanomaterials design and synthesis.
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spelling pubmed-56739562017-11-15 Silica nanoparticle aggregation in calcite replacement reactions Liesegang, Moritz Milke, Ralf Kranz, Christine Neusser, Gregor Sci Rep Article Natural nanoparticles are fundamental building blocks of Earth’s bio- and geosphere. Amorphous silica nanoparticles are ubiquitous in nature, but fundamental knowledge of their interaction mechanisms and role in mineral replacement reactions is limited. Here we show how silica nanoparticles replace Cretaceous calcite bivalve shells in a volume- and texture-preserving process. Electron tomography reveals that mineral replacement transfers calcite crystallographic orientations to twinned photonic crystals composed of face-centered cubic silica sphere stacks. During the face-specific replacement process, silica nanoparticles continuously nucleate, aggregate, and form a lattice of uniform spheres parallel to calcite low-energy facets. We explain the replacement process with a new model that unifies recently proposed, probably universal mechanisms of interface-coupled dissolution-precipitation and aggregation-based crystallization; both key mechanisms in geological processes and nanomaterials design and synthesis. Nature Publishing Group UK 2017-11-06 /pmc/articles/PMC5673956/ /pubmed/29109392 http://dx.doi.org/10.1038/s41598-017-06458-8 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liesegang, Moritz
Milke, Ralf
Kranz, Christine
Neusser, Gregor
Silica nanoparticle aggregation in calcite replacement reactions
title Silica nanoparticle aggregation in calcite replacement reactions
title_full Silica nanoparticle aggregation in calcite replacement reactions
title_fullStr Silica nanoparticle aggregation in calcite replacement reactions
title_full_unstemmed Silica nanoparticle aggregation in calcite replacement reactions
title_short Silica nanoparticle aggregation in calcite replacement reactions
title_sort silica nanoparticle aggregation in calcite replacement reactions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5673956/
https://www.ncbi.nlm.nih.gov/pubmed/29109392
http://dx.doi.org/10.1038/s41598-017-06458-8
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