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Intercalation and Ultrasonic Treatment of Graphite: a New Synthetic Route to Graphene
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Inorganic Chemistry. (oorganisk kemi)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Experimental Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Experimental Physics.
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2008 (English)Conference paper, Published paper (Refereed)
Abstract [en]

We will demonstrate that ultrasonic treatment of a graphite crystal in water can lead to the formation of small graphene-like flakes in solution. The delamination of the graphite can be increased dramatically by intercalation of bromine from a Br2-saturated water solution. After ultrasonic treatment, large amounts of graphene-like flakes with varying thickness are observed in SEM and TEM. They can be adsorbed onto a surface of a suitable substrate by a simple dipping technique. The effect of polar and non-polar solvents as well as adsorption of the graphene on hydrophobic and hydrophilic substrates will be demonstrated and compared. DFT calculations of the intercalation process have been carried out using the SIESTA package and the effect of bromine intercalation on cohesive energy and electronic structure will be discussed and compared with experimental data. Finally, the general approach of using ultrasonic treatment and intercalation as a facile route to graphene synthesis compared to other methods will be discussed.

Place, publisher, year, edition, pages
2008.
National Category
Inorganic Chemistry Engineering and Technology
Research subject
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-99218OAI: oai:DiVA.org:uu-99218DiVA: diva2:202512
Conference
AVS 55th International Symposium & Exibition, Boston, USA 19-24 oktober 2008
Available from: 2009-03-10 Created: 2009-03-10 Last updated: 2017-01-25Bibliographically approved

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Rubino, StefanoSanyal, BiplabEriksson, OlleLeifer, Klaus

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Rubino, StefanoSanyal, BiplabEriksson, OlleLeifer, Klaus
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Inorganic ChemistryExperimental PhysicsDepartment of Physics and Materials ScienceDepartment of Biochemistry and Organic Chemistry
Inorganic ChemistryEngineering and Technology

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