uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Transferable Graphene Oxide Films with Tunable Microstructures.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
Show others and affiliations
2010 (English)In: ACS Nano, ISSN 1936-0851, Vol. 4, no 12, 7367-7372 p.Article in journal (Refereed) Published
Abstract [en]

This report describes methods to produce large-area films of graphene oxide from aqueous suspensions using electrophoretic deposition. By selecting the appropriate suspension pH and deposition voltage, films of the negatively charged graphene oxide sheets can be produced with either a smooth "rug" microstructure on the anode or a porous "brick" microstructure on the cathode. Cathodic deposition occurs in the low pH suspension with the application of a relatively high voltage, which facilitates a gradual change in the colloids' charge from negative to positive as they adsorb protons released by the electrolysis of water. The shift in the colloids' charge also gives rise to the brick microstructure, as the concurrent decrease in electrostatic repulsion between graphene oxide sheets results in the formation of multilayered aggregates (the "bricks"). Measurements of water contact angle revealed the brick films (79°) to be more hydrophobic than the rug films (41°), a difference we attribute primarily to the distinct microstructures. Finally, we describe a sacrificial layer technique to make these graphene oxide films free-standing, which would enable them to be placed on arbitrary substrates.

Place, publisher, year, edition, pages
2010. Vol. 4, no 12, 7367-7372 p.
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-136457DOI: 10.1021/nn102152xPubMedID: 21114272OAI: oai:DiVA.org:uu-136457DiVA: diva2:376921
Available from: 2010-12-13 Created: 2010-12-13 Last updated: 2011-07-22Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed
By organisation
Nanotechnology and Functional Materials
In the same journal
ACS Nano
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 430 hits
ReferencesLink to record
Permanent link

Direct link