Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Self-organizing nanoparticles: a model for tomorrow's nanofactories

01.11.2007
With inspiration from bacteria and butterflies, researchers at Stockholm University have developed a new method that shows how nanomaterials can be produced in the future.

In an article in the prestigious journal Proceedings of the National Academy of Sciences, Professor Lennart Bergström shows how a glass bottle and a simple hobby magnet can be used to produce and arrange extremely small cubes of iron oxide in a perfectly checkered pattern.

The new method can give magnetic films with superior information storage capacity," says Lennart Bergström.

To produce nanoparticles with a defined form and size and at the same time organize them in well-ordered structures is one of the few realistic ways of producing tomorrow's nanomaterials on an industrial scale. It sounds like a dream, but the fact is that nature uses these construction principles in order to make the wings of a butterfly shimmer in all the colors of the rainbow and to create a compass needle of magnetic nanoparticles in certain bacteria.

In the article, Lennart Bergström and his colleagues show how it is possible to create a self-organizing system in which the system itself can achieve a flawless structure. Instead of slowly building up these intricate structures by for example etching, the particles are "programmed" to build the desired structure themselves. Nanoparticles are ideal building blocks for creating two- and three-dimensional structures with tailor-made properties. It is possible to combine metals, semiconductors, and magnetic nanoparticles in one and the same material, thereby obtaining entirely new combinations of properties.

"Our vision is to get nanoparticles to collaborate and construct complicated structures at will," says Lennart Bergström. "New types of nanostructured materials with unique characteristics, such as magnetic and catalytic properties, can then be created where they are most needed and in such a way that they can be readily reused. This opens up exciting possibilities to tailor the structure and function of materials, a goal for all materials chemists."

Name of article: "Magnetic field induced assembly of oriented superlattices from maghemite nanocubes"A. Ahniyaz, Y. Sakamoto, and L. Bergström, PNAS, ("early edition" published at end of week 44)

For more information: Prof. Lennart Bergström, Department of Physical, Inorganic, and Structural Chemistry, Stockholm University. cell phone: +46 (0)70-5179991; phone: +46 (0)8-16 23 68, e-mail: lennartb@inorg.su.se For images: phone: +46 (0)8-16 40 90, e-mail press@su.se

Maria Erlandsson | idw
Further information:
http://www.vr.se

More articles from Power and Electrical Engineering:

nachricht A big nano boost for solar cells
18.01.2017 | Kyoto University and Osaka Gas effort doubles current efficiencies

nachricht Multiregional brain on a chip
16.01.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

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: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>