Interfacial rheology and structure of tiled graphene oxide sheets

The hydrophilic nature of graphene oxide sheets can be tailored by varying the carbon to oxygen ratio. Depending on this ratio, the particles can be deposited at either a water-air or a water-oil interface. Upon compression of thus-created Langmuir monolayers, the sheets cover the entire interface,...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 28(2012), 21 vom: 29. Mai, Seite 7990-8000
1. Verfasser: Imperiali, Luna (VerfasserIn)
Weitere Verfasser: Liao, Ken-Hsuan, Clasen, Christian, Fransaer, Jan, Macosko, Christopher W, Vermant, Jan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a The hydrophilic nature of graphene oxide sheets can be tailored by varying the carbon to oxygen ratio. Depending on this ratio, the particles can be deposited at either a water-air or a water-oil interface. Upon compression of thus-created Langmuir monolayers, the sheets cover the entire interface, assembling into a strong, compact layer of tiled graphene oxide sheets. With further compression, the particle layer forms wrinkles that are reversible upon expansion, resembling the behavior of an elastic membrane. In the present work, we investigate under which conditions the structure and properties of the interfacial layer are such that free-standing films can be obtained. The interfacial rheological properties of these films are investigated using both compressional experiments and shear rheometry. The role of surface rheology in potential applications of such tiled films is explored. The rheological properties are shown to be responsible for the efficiency of such layers in stabilizing water-oil emulsions. Moreover, because of the mechanical integrity, large-area monolayers can be deposited by, for example, Langmuir-Blodgett techniques using aqueous subphases. These films can be turned into transparent conductive films upon subsequent chemical reduction 
650 4 |a Journal Article 
700 1 |a Liao, Ken-Hsuan  |e verfasserin  |4 aut 
700 1 |a Clasen, Christian  |e verfasserin  |4 aut 
700 1 |a Fransaer, Jan  |e verfasserin  |4 aut 
700 1 |a Macosko, Christopher W  |e verfasserin  |4 aut 
700 1 |a Vermant, Jan  |e verfasserin  |4 aut 
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