Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Successful graphene synthesis out of single molecules

13.12.2013
Chemists from the Max Planck Institute for Polymer Research in Mainz manage to significantly develop the graphene synthesis. The industrial use of this wonder material is drawing nearer.

Researchers from the Max Planck Institute for Polymer Research (MPI-P) working with Xinliang Feng and Klaus Müllen succeeded in producing remarkably long, structurally well-defined and liquid-phase-processable graphene nanoribbons (GNRs). This newly developed synthesis method was introduced in the scientific journal "Nature Chemistry" http://www.nature.com/nchem/journal/vaop/ncurrent/full/nchem.1819.html.

This synthesis method consists in putting together molecular building blocks to produce graphene ribbons in the desired shape and size. The key property of this material is displayed only afterwards: defect-free graphene ribbons show excellent semiconducting properties. As a consequence, this nanomaterial could optimally be used in electronic devices such as transistors and be far more effective than the silicon currently in use.

"This is a great step to achieve graphene nanoribbons with unique properties and good solution processability by means of organic solution synthesis" research group leader Feng explains.

A worldwide scientific competition over the research and production of graphene has broken out. The European Commission is thoroughly involved: with a budget of nearly €1 billion over the next ten years, the research program "Graphene Flagship" (2013) provides funding for the utilization of graphene. Scientists at the MPI-P have already made important progresses: since 2003, Klaus Müllen, director at the MPI-P, pursues the "bottom-up" approach to synthesize graphene ribbons from molecular building blocks.

Mechanical methods ("top-down") or crystal growth do not reach the necessary precision and produce flawed results. The solution-mediated production method, developed in 2011 by the Müllen’s workgroup, meets conversely all the requirements. Thanks to a modification in the method, it is now possible to form structurally well-defined graphene ribbons. Graphene ribbons also have electronic bandgaps, which allow to control the movement of the electrons and the optical properties; a property that graphene – this highly praised wonder material – lacks. As a result, the charge carrier mobility of graphene ribbons is superior to that of silicon.

As a replacement of silicon in electronic devices, batteries or solar cells, graphene ribbons are expected to boost the performance of such devices in the future. Thus, it will be crucial to know if they can be manufactured on an industrial scale with the help of this new solution-synthetized method.

The inherent transdisciplinary cooperation approach of the Institute played a decisive role in this recent research success. The breakthrough made by the synthesis experts was only validated after numerous specific investigations carried by other workgroups of the MPI-P. Laser spectroscopic measurements showed that the graphene obtained in liquid phase has a high photoconductivity. Akimitsu Narita, a PhD student, who was significantly involved in the synthesis, could attest the existence of the bandgaps by investigating the ultraviolet absorption of the solution-synthetized graphene ribbons. Outside the MPI-P, other scientists - from the FU Berlin, the Netherlands, Britain, Denmark and Belgium - were also involved in analyzing the properties of this material.

The material will especially be the object of the fundamental research, to which the MPI-P is committed. The physical properties and their source will be microscopically and spectroscopically investigated to uncover further possible improvements and decisive properties.

The material will especially be the object of the fundamental research, to which the MPI-P is committed. The physical properties and their source will be microscopically and spectroscopically investigated to uncover further possible improvements and decisive properties.

Weitere Informationen:
http://www.mpip-mainz.mpg.de/news-events/news/graphene_nanoribbons
- Images and detailed information on the MPIP website

Stephan Imhof | Max-Planck-Institut
Further information:
http://www.mpip-mainz.mpg.de/news-events/news/graphene_nanoribbons

More articles from Life Sciences:

nachricht Newly designed molecule binds nitrogen
23.02.2018 | Julius-Maximilians-Universität Würzburg

nachricht Atomic Design by Water
23.02.2018 | Max-Planck-Institut für Eisenforschung GmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>