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94 Current news about the topic helium

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Microdrones With Light-driven Nanomotors

Completely new options for the usually extremely difficult handling of nano- and micro-objects

25-Apr-2022

Propelling micrometre-sized drones using light only and exerting precise control: Physicists at the University of Würzburg have succeeded at this for the first time. Their microdrones are significantly smaller than red blood cells. A hand-held laser pointer produces no noticeable recoil forces ...

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Helium bath splash

A surprising phenomenon

04-Jan-2022

While working with helium nanodroplets, scientists at the University of Innsbruck, Austria, have come across a surprising phenomenon: When the ultracold droplets hit a hard surface, they behave like drops of water. Ions with which they were previously doped thus remain protected on impact and are ...

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Researchers observe ultrafast processes of single molecules in liquid helium for the first time

How a molecule moves in the protective environment of a quantum fluid

24-Mar-2020

Markus Koch, head of the research group Femtosecond Dynamics at the Institute of Experimental Physics at TU Graz, and his team develop new methods for time-resolved femtosecond laser spectroscopy to investigate ultrafast processes in molecular systems. In 2018 the group demonstrated for the first ...

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Nanobubbles in nanodroplets

Researchers investigate ultrafast reaction of superfluid helium triggerd by extreme ultraviolet laser pulses

10-Jan-2020

A team headed by Professor Frank Stienkemeier at Freiburg’s Institute of Physics and Dr. Marcel Mudrich, professor at the University of Aarhus in Denmark, has observed the ultrafast reaction of nanodroplets of helium after excitation with extreme ultraviolet radiation (XUV) using a free-electron ...

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New primary method for the measurement of pressure based on electrical measurements carried out on helium gas

04-Dec-2019

Scientists from the Physikalisch-Technische Bundesanstalt (PTB) have implemented a novel pressure measurement method, quasi as a byproduct of the work on the "new" kelvin. In addition to being new, this procedure is a primary method, i.e. it only depends on natural constants. As an independent ...

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Novel process developed to recover high value products from natural gas

11-Sep-2019

Linde developed a novel process to recover high value products from natural gas successfully combining technologies of BASF and Linde. The process simultaneously recovers valuable helium, liquid hydrocarbons, and purified CO2 in addition to conditioning natural gas for pipeline transportation ...

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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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Simulating nature’s cosmic laboratory, one helium droplet at a time

27-Mar-2019

Two astronomers from the Max Planck Institute for Astronomy and from the University of Jena have found an elegant new method to measure the energy of simple chemical reactions, under similar conditions as those encountered by atoms and molecules in the early solar system. Their method promises ...

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Quantum structures in super-chilled helium may mirror early days of universe

A pathway to recreate possible conditions of the early universe here on earth

18-Jan-2019

For the first time, researchers have documented the long-predicted occurrence of 'walls bound by strings' in superfluid helium-3. The existence of such an object, originally foreseen by cosmology theorists, may help explaining how the universe cooled down after the Big Bang. With the newfound ...

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Why geckos can stick to walls

19-Nov-2018

It enables geckos to adhere to walls and ceilings, is involved in the formation of membranes in cells as well as in the docking of drugs to enzymes in the human body. Dispersion, i.e. the "weak interaction", is omnipresent in chemistry. A team of scientists at Jacobs University Bremen headed by ...

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