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 For a chimpanzee, one good turn deserves another
27.06.2017 | Max-Planck-Institut für Mathematik in den Naturwissenschaften (MPIMIS)

nachricht New method to rapidly map the 'social networks' of proteins
27.06.2017 | Salk Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Touch Displays WAY-AX and WAY-DX by WayCon

27.06.2017 | Power and Electrical Engineering

Drones that drive

27.06.2017 | Information Technology

Ultra-compact phase modulators based on graphene plasmons

27.06.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>