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New light for shaping electron beams

Adaptive imaging technique for materials science and structural biology

03-Oct-2022

A new technique that combines electron microscopy and laser technology enables programmable, arbitrary shaping of electron beams. It can potentially be used for optimizing electron optics and for adaptive electron microscopy, maximizing sensitivity while minimizing beam-induced damage. This ...

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"Hot" graphene reveals migration of carbon atoms

The study is an example of serendipity in research

27-Jun-2022

The migration of carbon atoms on the surface of the nanomaterial graphene was recently measured for the first time. Although the atoms move too swiftly to be directly observed with an electron microscope, their effect on the stability of the material can now be determined indirectly while the ...

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Chemical pollution threatens biodiversity

Scientists say more environmental pollutants should be considered in species protection

20-Jun-2022

Environmental chemical pollution threatens biodiversity. However, the complexity of this pollution remains insufficiently recognised by decision-makers - this is what international researchers led by Gabriel Sigmund from the University of Vienna and Ksenia Groh from the Swiss Federal Institute of ...

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Impossible material made possible inside a graphene sandwich

Towards new 2D materials

21-Jan-2022

Atoms bind together by sharing electrons. The way this happens depends on the atom types but also on conditions such as temperature and pressure. In two-dimensional (2D) materials, such as graphene, atoms join along a plane to form structures just one atom thick, which leads to fascinating ...

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New State of Matter: Crystalline and Flowing at the Same Time

Particles with pompom-like structure

13-Dec-2021

The predictions of researchers that certain particles of matter with sufficiently high density would form a new state - crystalline and flowing at the same time - could be confirmed in the laboratory. More than 20 years ago, researchers predicted that with sufficiently high density certain ...

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Researchers find a way to check that quantum computers return accurate answers

08-Sep-2021

Quantum computers become ever more powerful, but how can we be sure that the answers they return are accurate? A team of physicists from Vienna, Innsbruck, Oxford, and Singapore solves this problem by letting quantum computers check each other. Quantum computers are advancing at a rapid pace and ...

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Modeling uncovers an "atomic waltz" for atom manipulation

16-Aug-2021

Researchers at the University of Vienna’s Faculty of Physics in collaboration with colleagues from the Oak Ridge National Laboratory in the USA have uncovered a non-destructive mechanism to manipulate donor impurities within silicon using focused electron irradiation. In this novel indirect ...

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Atomic-scale tailoring of graphene approaches macroscopic world

"We are excited of the prospect of creating new materials that are designed starting at the atomic level, based on this method"

22-Jun-2021

Properties of materials are often defined by imperfections in their atomic structure, especially when the material itself is just one atom thick, such as graphene. Researchers at the University of Vienna have now developed a method for controlled creation of such imperfections into graphene at ...

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Crystalline supermirrors for trace gas detection in environmental science and medicine

Analysis of particularly complex gas mixtures with unprecedented accuracy

25-May-2021

In an international cooperation with partners from industry and research, physicists from the University of Vienna, together with Thorlabs, the National Institute of Standards and Technology (NIST), and the University of Kansas, have now succeeded for the first time in demonstrating ...

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When less is more: a single layer of atoms boosts the nonlinear generation of light

Structures built around a single layer of graphene allow for strong optical nonlinearities

16-Dec-2020

A wide array of technologies, ranging from lasers and optical telecommunication to quantum computing rely on nonlinear optical interaction. Typically, these nonlinear interactions, which allow a beam of light, for example, to change its frequency, are implemented by bulk materials. In a new study ...

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