Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nanotechnology may lead to more energy-efficient electronics

14.02.2012
Carbon nanotubes and graphene consist of just a couple of layers of carbon atoms, but they are lighter than aluminium, stronger than steel and can bend like spring-coils.
Physicist Niklas Lindahl at the University of Gothenburg, Sweden, has been studying the unique properties of the materials, which in future may result in improved electronics and light, strong material.

Nanotechnology could revolutionise the manufacture of new types of materials. Niklas Lindahl has studied carbon nanotubes and graphene, which are tubes and flat sheets consisting of a thin layer of carbon atoms. Their unique properties make them interesting to use in everything from composite materials in bicycles, to electronic computer components.

In his thesis, Niklas Lindahl demonstrates how carbon nanotubes can be made, and their mechanical properties. Under the right conditions, he used a carbonaceous gas to get carbon nanotubes to grow like forests, atom by atom. The “forests” consist of millions of carbon nanotubes that, despite being just a few nanometres in diameter, hold each other upright like stalks in a field of corn. The tubes, which are lighter than aluminium and stronger than steel when stretched, could be bent like spring-coils.
Niklas Lindahl also demonstrates how membranes of graphene can be bent. Despite the fact that the membranes were made up of just a couple of layers of atoms, their bending rigidity could be determined using the same equations as those used to calculate deformations in large steel spheres. Graphene membranes have many uses, including variable frequency generators in mobile phones, and mass sensors with the ability to measure individual atoms.

The thesis also demonstrates how similar graphene membranes can provide more energy-efficient electronics in the future. For example, suspended graphene electrodes can change the current more effectively through carbon nanotube transistors by combining both mechanical and electrical control of the current.

The thesis “Nanoelectromechanical systems from carbon nanotubes and graphene” was successfully defended on 27 January at the University of Gothenburg.
For more information, please contact: Niklas Lindahl, Department of Physics, University of Gothenburg
Telephone: +46 (0)31 7869149
Mobile: +46 (0)761 381987
E-mail: niklas.lindahl@physics.gu.se

Helena Aaberg | idw
Further information:
http://www.gu.se

Further reports about: Nanotechnology carbon atom carbon nanotubes composite material

More articles from Power and Electrical Engineering:

nachricht Energy hybrid: Battery meets super capacitor
01.12.2016 | Technische Universität Graz

nachricht Tailor-Made Membranes for the Environment
30.11.2016 | Forschungszentrum Jülich

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>