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A novel methodology to study nanoporous alumina by small-angle neutron scattering

Nanoporous anodic aluminium oxide (AAO) membranes are promising host systems for confinement of condensed matter. Characterizing their structure and composition is thus of primary importance for studying the behavior of confined objects. Here a novel methodology to extract quantitative information o...

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Autores principales: Christoulaki, Anastasia, Chennevière, Alexis, Grillo, Isabelle, Porcar, Lionel, Dubois, Emmanuelle, Jouault, Nicolas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662990/
https://www.ncbi.nlm.nih.gov/pubmed/31396027
http://dx.doi.org/10.1107/S160057671900726X
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author Christoulaki, Anastasia
Chennevière, Alexis
Grillo, Isabelle
Porcar, Lionel
Dubois, Emmanuelle
Jouault, Nicolas
author_facet Christoulaki, Anastasia
Chennevière, Alexis
Grillo, Isabelle
Porcar, Lionel
Dubois, Emmanuelle
Jouault, Nicolas
author_sort Christoulaki, Anastasia
collection PubMed
description Nanoporous anodic aluminium oxide (AAO) membranes are promising host systems for confinement of condensed matter. Characterizing their structure and composition is thus of primary importance for studying the behavior of confined objects. Here a novel methodology to extract quantitative information on the structure and composition of well defined AAO membranes by combining small-angle neutron scattering (SANS) measurements and scanning electron microscopy (SEM) imaging is reported. In particular, (i) information about the pore hexagonal arrangement is extracted from SEM analysis, (ii) the best SANS experimental conditions to perform reliable measurements are determined and (iii) a detailed fitting method is proposed, in which the probed length in the fitting model is a critical parameter related to the longitudinal pore ordering. Finally, to validate this strategy, it is applied to characterize AAOs prepared under different conditions and it is shown that the experimental SANS data can be fully reproduced by a core/shell model, indicating the existence of a contaminated shell. This original approach, based on a detailed and complete description of the SANS data, can be applied to a variety of confining media and will allow the further investigation of condensed matter under confinement.
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spelling pubmed-66629902019-08-08 A novel methodology to study nanoporous alumina by small-angle neutron scattering Christoulaki, Anastasia Chennevière, Alexis Grillo, Isabelle Porcar, Lionel Dubois, Emmanuelle Jouault, Nicolas J Appl Crystallogr Research Papers Nanoporous anodic aluminium oxide (AAO) membranes are promising host systems for confinement of condensed matter. Characterizing their structure and composition is thus of primary importance for studying the behavior of confined objects. Here a novel methodology to extract quantitative information on the structure and composition of well defined AAO membranes by combining small-angle neutron scattering (SANS) measurements and scanning electron microscopy (SEM) imaging is reported. In particular, (i) information about the pore hexagonal arrangement is extracted from SEM analysis, (ii) the best SANS experimental conditions to perform reliable measurements are determined and (iii) a detailed fitting method is proposed, in which the probed length in the fitting model is a critical parameter related to the longitudinal pore ordering. Finally, to validate this strategy, it is applied to characterize AAOs prepared under different conditions and it is shown that the experimental SANS data can be fully reproduced by a core/shell model, indicating the existence of a contaminated shell. This original approach, based on a detailed and complete description of the SANS data, can be applied to a variety of confining media and will allow the further investigation of condensed matter under confinement. International Union of Crystallography 2019-06-28 /pmc/articles/PMC6662990/ /pubmed/31396027 http://dx.doi.org/10.1107/S160057671900726X Text en © Anastasia Christoulaki et al. 2019 http://creativecommons.org/licenses/by/4.0/ 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/4.0/
spellingShingle Research Papers
Christoulaki, Anastasia
Chennevière, Alexis
Grillo, Isabelle
Porcar, Lionel
Dubois, Emmanuelle
Jouault, Nicolas
A novel methodology to study nanoporous alumina by small-angle neutron scattering
title A novel methodology to study nanoporous alumina by small-angle neutron scattering
title_full A novel methodology to study nanoporous alumina by small-angle neutron scattering
title_fullStr A novel methodology to study nanoporous alumina by small-angle neutron scattering
title_full_unstemmed A novel methodology to study nanoporous alumina by small-angle neutron scattering
title_short A novel methodology to study nanoporous alumina by small-angle neutron scattering
title_sort novel methodology to study nanoporous alumina by small-angle neutron scattering
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662990/
https://www.ncbi.nlm.nih.gov/pubmed/31396027
http://dx.doi.org/10.1107/S160057671900726X
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