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85 Current news about the topic molecules

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How to separate nanoparticles by “shape”

New strategy to separate molecules

13-Jun-2019

In our daily lives, the purpose and function of an item is defined by either its material, e.g. a rain jacket is fabricated of water-proof material, or its shape, e.g. a wheel is round to enable a rolling motion. What is the impact of the two factors on the nanoscale? The impact of material, ...

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Direct Observation of Giant Molecules

Physicists achieved to form giant diatomic molecules and optically detect them afterwards by using a high-resolution objective

07-Jun-2019

The tiny size of conventional diatomic molecules in the sub-nanometer regime hinders direct optical resolution of their constituents. Physicists from the Quantum Many Body Division at MPQ led by Prof. Immanuel Bloch were able to bind pairs of highly excited atoms at a distance of one micrometer. ...

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First astrophysical detection of the helium hydride ion

23-Apr-2019

HeH+ was the first molecule that formed when, almost 14 billion years ago, falling temperatures in the young Universe allowed recombination of the light elements produced in the Big Bang. At that time, ionized hydrogen and neutral helium atoms reacted to form HeH+. Despite its importance in the ...

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Quantum cascade laser measures ethanol

Precision work for large molecules

01-Apr-2019

Quantum cascade lasers are able to measure the smallest molecules with high precision. But the technology has failed to measure larger gas molecules - until now! Empa researchers have succeeded in quantifying ethanol, an important organic molecule, with the aid of such a laser. In collaboration ...

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Turning a molecule into a coherent two-level quantum system

08-Mar-2019

Organic dye molecules are commonly known from color pigments or from fluorescence microscopy in biology. Although as any other molecule, they are fundamentally quantum mechanical objects made of a small number of atoms, they are usually not associated with quantum technologies, not even within ...

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New approach facilitates spectroscopy on individual molecules

At the limits of detectability

08-Mar-2019

While spectroscopic measurements are normally averaged over myriad molecules, a new method developed by researchers at the Technical University of Munich (TUM) provides precise information about the interaction of individual molecules with their environment. This will accelerate the ...

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Physicists watch electron transfer in a single molecule

15-Feb-2019

The building blocks of matter surrounding us are atoms and molecules. The properties of that matter, however, are often not set by these building blocks directly, but rather by their mutual interactions, which are governed by their outer electron shells. Many chemical processes are based on the ...

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Keep in touch, use the vacuum! How mirrors can control physics and chemistry

14-Feb-2019

Hamburg scientists’ theory of polaritonically amplified energy transfer over long distances between molecules paves the way for a new level of chemical engineering and ‘spooky chemistry’. Scientists from the Theory Department of the Max Planck Institute for the Structure and Dynamics of Matter ...

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Harnessing the power of light to tackle asymmetrical molecules

06-Feb-2019

No, molecules do not actually have hands. But scientists refer to them in this way when looking at asymmetric molecules that are mirror images of one another and therefore are not superimposable. Whether a molecule is a "lefty" or "righty" also influences how they behave -- critical information ...

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Hand-knitted Molecules

Chemistry at very small scales

22-Jan-2019

Molecules are usually formed in reaction vessels or laboratory flasks. An Empa research team has now succeeded in producing molecules between two microscopically small, movable gold tips – in a sense as a "hand-knitted" unique specimen. The properties of the molecules can be monitored in real ...

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