Liquid Crystallinity and Dimensions of Surfactant-Stabilized Sheets of Reduced Graphene Oxide.
Identifieur interne : 005327 ( Main/Exploration ); précédent : 005326; suivant : 005328Liquid Crystallinity and Dimensions of Surfactant-Stabilized Sheets of Reduced Graphene Oxide.
Auteurs : Camilo Zamora-Ledezma [France] ; Nicolas Puech [France] ; Cécile Zakri [France] ; Eric Grelet [France] ; Simon E. Moulton [Australie] ; Gordon G. Wallace [Australie] ; Sanjeev Gambhir [Australie] ; Christophe Blanc [France] ; Eric Anglaret [France] ; Philippe Poulin [France]Source :
- The journal of physical chemistry letters [ 1948-7185 ] ; 2012.
Abstract
Graphene oxide (GO) flakes dissolved in water can spontaneously form liquid crystals. Liquid crystallinity presents an opportunity to process graphene materials into macroscopic assemblies with long-range ordering, but most graphene electronic functionalities are lost in oxidation treatments. Reduction of GO allows recovering functionalities and makes reduced graphene oxide (RGO) of greater interest. Unfortunately, chemical reduction of GO generally results in the aggregation of the flakes, with no liquid crystallinity observed. We report in the present work liquid crystals made of RGO. The addition of surfactants in appropriate conditions is used to stabilize the RGO flakes against aggregation maintaining their ability to form water-based liquid crystals. Structural and thermodynamical studies allow the dimensions of the flakes to be deduced. It is found that the thickness and diameter of RGO flakes are close to that of neat GO flakes.
DOI: 10.1021/jz3008479
PubMed: 26292127
Affiliations:
- Australie, France
- Aquitaine, Languedoc-Roussillon, Nouvelle-Aquitaine, Occitanie (région administrative)
- Montpellier, Pessac
- Université Montpellier 2
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CNRS, 115 Avenue Schweitzer, 33600 Pessac, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac</wicri:regionArea><placeName><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Aquitaine</region><settlement type="city">Pessac</settlement></placeName></affiliation></author><author><name sortKey="Puech, Nicolas" sort="Puech, Nicolas" uniqKey="Puech N" first="Nicolas" last="Puech">Nicolas Puech</name><affiliation wicri:level="3"><nlm:affiliation>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac</wicri:regionArea><placeName><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Aquitaine</region><settlement type="city">Pessac</settlement></placeName></affiliation></author><author><name sortKey="Zakri, Cecile" sort="Zakri, Cecile" uniqKey="Zakri C" first="Cécile" last="Zakri">Cécile Zakri</name><affiliation wicri:level="3"><nlm:affiliation>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac</wicri:regionArea><placeName><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Aquitaine</region><settlement type="city">Pessac</settlement></placeName></affiliation></author><author><name sortKey="Grelet, Eric" sort="Grelet, Eric" uniqKey="Grelet E" first="Eric" last="Grelet">Eric Grelet</name><affiliation wicri:level="3"><nlm:affiliation>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac</wicri:regionArea><placeName><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Aquitaine</region><settlement type="city">Pessac</settlement></placeName></affiliation></author><author><name sortKey="Moulton, Simon E" sort="Moulton, Simon E" uniqKey="Moulton S" first="Simon E" last="Moulton">Simon E. Moulton</name><affiliation wicri:level="1"><nlm:affiliation>§ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>§ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales</wicri:regionArea><wicri:noRegion>New South Wales</wicri:noRegion></affiliation></author><author><name sortKey="Wallace, Gordon G" sort="Wallace, Gordon G" uniqKey="Wallace G" first="Gordon G" last="Wallace">Gordon G. Wallace</name><affiliation wicri:level="1"><nlm:affiliation>§ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>§ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales</wicri:regionArea><wicri:noRegion>New South Wales</wicri:noRegion></affiliation></author><author><name sortKey="Gambhir, Sanjeev" sort="Gambhir, Sanjeev" uniqKey="Gambhir S" first="Sanjeev" last="Gambhir">Sanjeev Gambhir</name><affiliation wicri:level="1"><nlm:affiliation>§ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>§ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales</wicri:regionArea><wicri:noRegion>New South Wales</wicri:noRegion></affiliation></author><author><name sortKey="Blanc, Christophe" sort="Blanc, Christophe" uniqKey="Blanc C" first="Christophe" last="Blanc">Christophe Blanc</name><affiliation wicri:level="4"><nlm:affiliation>∥Laboratoire Charles Coulomb UMR 5221, Université Montpellier II, place Eugène Bataillon, 34095 Montpellier Cedex 5, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>∥Laboratoire Charles Coulomb UMR 5221, Université Montpellier II, place Eugène Bataillon, 34095 Montpellier Cedex 5</wicri:regionArea><wicri:noRegion>34095 Montpellier Cedex 5</wicri:noRegion><orgName type="university">Université Montpellier 2</orgName><placeName><settlement type="city">Montpellier</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Languedoc-Roussillon</region></placeName></affiliation></author><author><name sortKey="Anglaret, Eric" sort="Anglaret, Eric" uniqKey="Anglaret E" first="Eric" last="Anglaret">Eric Anglaret</name><affiliation wicri:level="4"><nlm:affiliation>∥Laboratoire Charles Coulomb UMR 5221, Université Montpellier II, place Eugène Bataillon, 34095 Montpellier Cedex 5, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>∥Laboratoire Charles Coulomb UMR 5221, Université Montpellier II, place Eugène Bataillon, 34095 Montpellier Cedex 5</wicri:regionArea><wicri:noRegion>34095 Montpellier Cedex 5</wicri:noRegion><orgName type="university">Université Montpellier 2</orgName><placeName><settlement type="city">Montpellier</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Languedoc-Roussillon</region></placeName></affiliation></author><author><name sortKey="Poulin, Philippe" sort="Poulin, Philippe" uniqKey="Poulin P" first="Philippe" last="Poulin">Philippe Poulin</name><affiliation wicri:level="1"><nlm:affiliation>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>†Centre de Recherche Paul-Pascal, Université de Bordeaux - CNRS, 115 Avenue Schweitzer, 33600 Pessac</wicri:regionArea><wicri:noRegion>33600 Pessac</wicri:noRegion><wicri:noRegion>33600 Pessac</wicri:noRegion></affiliation></author></analytic><series><title level="j">The journal of physical chemistry letters</title><idno type="ISSN">1948-7185</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Graphene oxide (GO) flakes dissolved in water can spontaneously form liquid crystals. Liquid crystallinity presents an opportunity to process graphene materials into macroscopic assemblies with long-range ordering, but most graphene electronic functionalities are lost in oxidation treatments. Reduction of GO allows recovering functionalities and makes reduced graphene oxide (RGO) of greater interest. Unfortunately, chemical reduction of GO generally results in the aggregation of the flakes, with no liquid crystallinity observed. We report in the present work liquid crystals made of RGO. The addition of surfactants in appropriate conditions is used to stabilize the RGO flakes against aggregation maintaining their ability to form water-based liquid crystals. Structural and thermodynamical studies allow the dimensions of the flakes to be deduced. It is found that the thickness and diameter of RGO flakes are close to that of neat GO flakes.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Aquitaine</li><li>Languedoc-Roussillon</li><li>Nouvelle-Aquitaine</li><li>Occitanie (région administrative)</li></region><settlement><li>Montpellier</li><li>Pessac</li></settlement><orgName><li>Université Montpellier 2</li></orgName></list><tree><country name="France"><region name="Nouvelle-Aquitaine"><name sortKey="Zamora Ledezma, Camilo" sort="Zamora Ledezma, Camilo" uniqKey="Zamora Ledezma C" first="Camilo" last="Zamora-Ledezma">Camilo Zamora-Ledezma</name></region><name sortKey="Anglaret, Eric" sort="Anglaret, Eric" uniqKey="Anglaret E" first="Eric" last="Anglaret">Eric Anglaret</name><name sortKey="Blanc, Christophe" sort="Blanc, Christophe" uniqKey="Blanc C" first="Christophe" last="Blanc">Christophe Blanc</name><name sortKey="Grelet, Eric" sort="Grelet, Eric" uniqKey="Grelet E" first="Eric" last="Grelet">Eric Grelet</name><name sortKey="Poulin, Philippe" sort="Poulin, Philippe" uniqKey="Poulin P" first="Philippe" last="Poulin">Philippe Poulin</name><name sortKey="Puech, Nicolas" sort="Puech, Nicolas" uniqKey="Puech N" first="Nicolas" last="Puech">Nicolas Puech</name><name sortKey="Zakri, Cecile" sort="Zakri, Cecile" uniqKey="Zakri C" first="Cécile" last="Zakri">Cécile Zakri</name></country><country name="Australie"><noRegion><name sortKey="Moulton, Simon E" sort="Moulton, Simon E" uniqKey="Moulton S" first="Simon E" last="Moulton">Simon E. Moulton</name></noRegion><name sortKey="Gambhir, Sanjeev" sort="Gambhir, Sanjeev" uniqKey="Gambhir S" first="Sanjeev" last="Gambhir">Sanjeev Gambhir</name><name sortKey="Wallace, Gordon G" sort="Wallace, Gordon G" uniqKey="Wallace G" first="Gordon G" last="Wallace">Gordon G. Wallace</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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