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 Linear potentiometer LRW2/3 - Maximum precision with many measuring points
17.05.2017 | WayCon Positionsmesstechnik GmbH

nachricht First flat lens for immersion microscope provides alternative to centuries-old technique
17.05.2017 | 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: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

Im Focus: Bacteria harness the lotus effect to protect themselves

Biofilms: Researchers find the causes of water-repelling properties

Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...

Im Focus: Hydrogen Bonds Directly Detected for the First Time

For the first time, scientists have succeeded in studying the strength of hydrogen bonds in a single molecule using an atomic force microscope. Researchers from the University of Basel’s Swiss Nanoscience Institute network have reported the results in the journal Science Advances.

Hydrogen is the most common element in the universe and is an integral part of almost all organic compounds. Molecules and sections of macromolecules are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

Innovation 4.0: Shaping a humane fourth industrial revolution

17.05.2017 | Event News

Media accreditation opens for historic year at European Health Forum Gastein

16.05.2017 | Event News

 
Latest News

New approach to revolutionize the production of molecular hydrogen

22.05.2017 | Materials Sciences

Scientists enlist engineered protein to battle the MERS virus

22.05.2017 | Life Sciences

Experts explain origins of topographic relief on Earth, Mars and Titan

22.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>