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Spin current from heat

New material increases efficiency

22-Nov-2017

Electronic devices such as computers generate heat that mostly goes to waste. Physicists at Bielefeld University have found a way to use this energy: They apply the heat to generate magnetic signals known as 'spin currents'. In future, these signals could replace some of the electrical current in ...

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Chip-based nanoscopy: Microscopy in HD quality

27-Apr-2017

This information can be used to produce images with a resolution of about 20 to 30 nanometres, and thereby ten times that of conventional light microscopy. Until now, this method has required the use of expensive special instruments. Bielefeld University and the University of Tromsø have filed a ...

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Hot electrons point the way to perfect light absorption

02-Sep-2015

Light-absorbing films can be found in many everyday applications such as solar cells or sensors. They are used to convert light into electrical current or heat. The films literally trap the light. Although such absorber films are applied widely, scientists still do not know which mechanism ...

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Cooling with molecules

Researchers at the universities in Bielefeld, Manchester, and Zaragoza present low-temperature experiment in Nature Communications

24-Oct-2014

An international team of scientists have become the first ever researchers to successfully reach temperatures below minus 272.15 degrees Celsius – only just above absolute zero – using magnetic molecules. The physicists and chemists are presenting their new investigation in Nature ...

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A new path to produce membranes

26-Aug-2013

In the future, carbon nanomembranes are expected to be able to filter out very fine materials. These separating layers are ultrathin, consisting of just one layer of molecules. In the long term, they could allow to separate gases from one another, for example, filtering toxins from the air. At ...

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New modular system for controlled synthesis of metal/metal oxide nanocomposite thin films

Concept is based on research at Bielefeld University

22-Sep-2011

Semiconductor thin films with special electronic, magnetic or optical functions are widely demanded for technical applications in increasingly smaller and efficient devices - they are indispensable in high-efficiency solar cells, bright light-emitting diodes and magneto-electronic devices. ...

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High-tech microscope measures electron oscillations

22-Aug-2011

Researchers from Bielefeld, Kaiserslautern and Würzburg have developed a novel high-tech microscope: It magnifies objects a million times and shows movements with a retardation of one million billion times. The new technology allows tracking extremely fast processes in miniature objects – with an ...

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New impulses for surface research

American Humboldt Award winner Ralph G. Nuzzo will spend a several-months research period at KIT and at Bielefeld University

21-Jan-2011

At the beginning of the 1980s, the chemist Professor Ralph G. Nuzzo paved the way for use of the first thiol-based self-assembling monolayers (SAMs). Nanotechnology is not imaginable today without that innovation. Professor Nuzzo is now honored with the Research Award of the Alexander von ...

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Building with pentagons

02-Jun-2009

Achim Müller and co-workers from Bielefeld University and Marshall Luban with his co-workers from the Departments of Physics and Astronomy at both Francis Marion University and Iowa State University worked on synthesising a Keplerate using pentagonal tungsten-oxide based units and studied its ...

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Towards mimicking metalloenzymes

16-Apr-2009

Scientists in Germany and the US generate highly oxidised diiron complexes that further our understanding on metalloenzymes in nature. Oxidised diiron species are used in nature in the active sites of several metalloenzymes, such as methane monooxygenase and ribonucleotide reductase. Methane ...

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