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Stochastic polarity formation in molecular crystals, composite materials and natural tissues

This topical review summarizes the theoretical and experimental findings obtained over the last 20 years on the subject of growth-induced polarity formation driven by a Markov chain process. When entering the growing surface of a molecular crystal, an inorganic–organic composite or a natural tissue,...

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Autores principales: Hulliger, Jürg, Burgener, Matthias, Hesterberg, Rolf, Sommer, Martin, Brahimi, Khadidja, Aboulfadl, Hanane
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5571799/
https://www.ncbi.nlm.nih.gov/pubmed/28875023
http://dx.doi.org/10.1107/S205225251700700X
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author Hulliger, Jürg
Burgener, Matthias
Hesterberg, Rolf
Sommer, Martin
Brahimi, Khadidja
Aboulfadl, Hanane
author_facet Hulliger, Jürg
Burgener, Matthias
Hesterberg, Rolf
Sommer, Martin
Brahimi, Khadidja
Aboulfadl, Hanane
author_sort Hulliger, Jürg
collection PubMed
description This topical review summarizes the theoretical and experimental findings obtained over the last 20 years on the subject of growth-induced polarity formation driven by a Markov chain process. When entering the growing surface of a molecular crystal, an inorganic–organic composite or a natural tissue, the building blocks may undergo 180° orientational disorder. Driven by configurational entropy, faulted orientations can promote the conversion of a growing non-polar seed into an object showing polar domains. Similarly, orientational disorder at the interface may change a polar seed into a two-domain state. Analytical theory and Monte Carlo simulations were used to model polarity formation. Scanning pyroelectric, piezoresponse force and phase-sensitive second-harmonic microscopies are methods for investigating the spatial distribution of polarity. Summarizing results from different types of materials, a general principle is provided for obtaining growth-induced polar domains: a non-zero difference in the probabilities for 180° orientational misalignments of building blocks, together with uni-directional growth, along with Markov chain theory, can produce objects showing polar domains.
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spelling pubmed-55717992017-09-05 Stochastic polarity formation in molecular crystals, composite materials and natural tissues Hulliger, Jürg Burgener, Matthias Hesterberg, Rolf Sommer, Martin Brahimi, Khadidja Aboulfadl, Hanane IUCrJ Topical Reviews This topical review summarizes the theoretical and experimental findings obtained over the last 20 years on the subject of growth-induced polarity formation driven by a Markov chain process. When entering the growing surface of a molecular crystal, an inorganic–organic composite or a natural tissue, the building blocks may undergo 180° orientational disorder. Driven by configurational entropy, faulted orientations can promote the conversion of a growing non-polar seed into an object showing polar domains. Similarly, orientational disorder at the interface may change a polar seed into a two-domain state. Analytical theory and Monte Carlo simulations were used to model polarity formation. Scanning pyroelectric, piezoresponse force and phase-sensitive second-harmonic microscopies are methods for investigating the spatial distribution of polarity. Summarizing results from different types of materials, a general principle is provided for obtaining growth-induced polar domains: a non-zero difference in the probabilities for 180° orientational misalignments of building blocks, together with uni-directional growth, along with Markov chain theory, can produce objects showing polar domains. International Union of Crystallography 2017-05-24 /pmc/articles/PMC5571799/ /pubmed/28875023 http://dx.doi.org/10.1107/S205225251700700X Text en © Jürg Hulliger et al. 2017 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/2.0/uk/
spellingShingle Topical Reviews
Hulliger, Jürg
Burgener, Matthias
Hesterberg, Rolf
Sommer, Martin
Brahimi, Khadidja
Aboulfadl, Hanane
Stochastic polarity formation in molecular crystals, composite materials and natural tissues
title Stochastic polarity formation in molecular crystals, composite materials and natural tissues
title_full Stochastic polarity formation in molecular crystals, composite materials and natural tissues
title_fullStr Stochastic polarity formation in molecular crystals, composite materials and natural tissues
title_full_unstemmed Stochastic polarity formation in molecular crystals, composite materials and natural tissues
title_short Stochastic polarity formation in molecular crystals, composite materials and natural tissues
title_sort stochastic polarity formation in molecular crystals, composite materials and natural tissues
topic Topical Reviews
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5571799/
https://www.ncbi.nlm.nih.gov/pubmed/28875023
http://dx.doi.org/10.1107/S205225251700700X
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