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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2019
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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. |
format | Online Article Text |
id | pubmed-6662990 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
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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