Organic Synthesis on Graphene
FABIAN M. KOEHLER AND WENDELIN J. STARK*
Institute for Chemical and Bioengineering, Department of Chemistry and Applied
Biosciences, ETH Zurich, 8093 Zurich, Switzerland
共10頁 引文68篇
CONSPECTUS
Graphene is a two-dimensional crystalline carbon allotrope that has fascinated researchers worldwide and has extended the
interest in carbon structures such as fullerenes and nanotubes. In this Account, we use electrical characterization tools to
study chemistry on supported graphene. These experiments elucidate the way covalently bound phenyl units can change
graphene's physical properties. Can we use chemistry to control electronic properties of graphene? What can we learn from well-
known carbon allotropes like fullerenes?
The surfaces of fullerenes and graphene show distinct differences in reactivity because of the high strain of sp2carbon in
fullerenes compared with the complete lack of strain in graphene. Diazonium chemistry provides a versatile tool for attaching
phenyl units covalently to carbon to produce advanced materials and electronic components, but diazonium-based carbon
chemistry is strongly influenced by strain. Although fullerenes are highly reactive, graphite (stacks of graphene) remains relatively
inert. We chemically introduce n- and p-like doping patterns in two-dimensional graphene using photolithography and extend the
ability to chemically control doping to the chemical design of conducting and insulating areas. Thereby we can shape graphene
surfaces into functional electronic devices.
This Account also describes multistep synthesis on graphene-coated nanoparticles and the introduction of various functional
groups on graphene surfaces. Only few functional groups can be produced directly via diazonium chemistry. To overcome this
issue, we used these functional groups as starting points for more demanding organic reactions. We covalently attached chelating
agents, catalysts, or polymers on the carbon surface. These more complex reactions facilitate the design of electronic modifications,
intergraphene connections, and anchors for polymer incorporation. Diazonium chemistry forms strong covalent bridges between
graphene and other areas of chemistry.
Biography
Fabian M. Koehler received his M.Sc. degree in Chemical- and Bioengineering from ETH Zurich along with the Willi-Studer Award for outstanding master students. He obtained the Ph.D. degree for his thesis about electronic transport analysis of chemically modified graphene from ETH Zurich in 2011. Currently, he is a Pioneer Fellow at the Functional Materials Laboratory of ETH Zurich responsible for the development of next generation diagnostics focused on rapid and quantitative point of need analysis.
Biography
Wendelin J. Stark received his Master in Chemistry in 2000, followed by a Ph.D. in Mechanical Engineering in 2002, both from ETH Zurich. In 2004, he founded the Functional Materials Laboratory within the Department of Chemistry and Applied Bioscience at the ETH Zurich. His research group pursues application-oriented research at the interface of chemistry with material science and medicine.![Acc. Chem. Res. 熱點綜述:基于石墨烯的有機合成]()
[ Last edited by nowitzki_ci on 2014-3-26 at 12:12 ] |