Results 91 to 100 of about 695,127 (377)

Properties of Dense Fluid Hydrogen and Helium in Giant Gas Planets

, 2006
Equilibrium properties of hydrogen-helium mixtures under thermodynamic conditions found in the interior of giant gas planets are studied by means of density functional theory molecular dynamics simulations.
Burrows, Guillot, Kresse, Kresse, Kresse, Kresse, Mattson, Mayor, Militzer, Perdew, Pfaffenzeller, Rivera, Saumon, Troullier, Vorberger   +14 more
core   +2 more sources

Nanopore fabrication and characterization by helium ion microscopy [PDF]

, 2016
The Helium Ion Microscope (HIM) has the capability to image small features with a resolution down to 0.35 nm due to its highly focused gas field ionization source and its small beam-sample interaction volume.
Daniel Emmrich, A. Beyer, A. Nadzeyka, S. Bauerdick, Jannik C. Meyer, J. Kotakoski, A. Gölzhäuser   +6 more
semanticscholar   +1 more source

3D Printing of Functional Mesoporous Silica Monoliths with Embedded Metal and MOF Components

Advanced Functional Materials, EarlyView.
This article presents the development of silica nanocage‐based nano‐inks tailored for digital light processing 3D printing, enabling automated additive manufacturing of mesoporous monoliths. Novel strategies for incorporating metal sites and inducing in situ growth of metal‐organic frameworks are introduced.
Thomas Gaillard, Arianna Bertero, Christine Joly‐Duhamel, Christine Biolley, Bartolomeo Coppola, Nicolas Brun, Anne Galarneau, Tangi Aubert   +7 more
wiley   +1 more source

Observation of the Efimov state of the helium trimer [PDF]

Science, 2015
We report experimental observation of the long predicted but experimentally elusive Efimov state of 4He trimer by means of Coulomb explosion imaging. We show spatial images of an Efimov state, confirming the predicted size and a typical structure where ...
M. Kunitski, S. Zeller, J. Voigtsberger, A. Kalinin, L. Schmidt, M. Schöffler, A. Czasch, W. Schöllkopf, R. Grisenti, T. Jahnke, D. Blume, R. Dörner   +11 more
semanticscholar   +1 more source

High‐Density Boron Nitride Nanotube Composites via Surfactant‐Stabilized Lyotropic Liquid Crystals for Enhanced Space Radiation Shielding

Advanced Functional Materials, EarlyView.
High‐density BNNT films, enabling mechanical robustness and high space radiation shielding effectiveness, are fabricated using surfactant‐stabilized BNNT liquid crystal. Simulations indicate that a 50 g cm−2 BNNT film can reduce radiation exposure by 56% compared to zero shielding, potentially doubling the duration of astronaut missions on the lunar ...
Young‐Kyeong Kim, Ik Jae Lim, Hongjin Lim, Yongbi Joo, Jueun Park, Md Monir Hossain, Hyunjin Cho, Nam‐Ho You, Seokhoon Ahn, Hunsu Lee, Sang Seok Lee, Yongho Joo, Se Youn Moon, Hee Il Yoo, Calista Lum, Cheol Park, Siyoung Q. Choi, Se Gyu Jang   +17 more
wiley   +1 more source

Advantages and disadvantages of substitution of helium as carrier gas in gas chromatography by hydrogen. Part II. - Retention time and selectivity.

Kvasný průmysl, 2013
Gas chromatography often uses helium, hydrogen, and nitrogen as carrier gases. The most common carrier gas is helium since it provides good separations, is inert, and is safe to use.
Tomáš HORÁK, Jiří ČULÍK, Karel ŠTĚRBA, Jana OLŠOVSKÁ   +3 more
doaj   +1 more source

Influence of a plasma jet on the hydrodynamics of a helium jet [PDF]

, 2013
In this paper, we present a study of the influence of non-equilibrium microplasma jets (“plasma bullets”) on the hydrodynamics of a helium jet operating in open air.
Douat, Claire, Foletto, Marc, Fontane, Jérôme, Joly, Laurent, Pitchford, Leanne, Puech, Vincent   +5 more
core  

Boosting the Energy Density of “Anode‐Free” Lithium Metal Batteries via Electrospun Polymeric Scaffolds

Advanced Functional Materials, EarlyView.
While host structures are known to enhance the reversibility and safety of lithium metal deposition, their additional volume and weight often decrease the battery's energy density and specific energy. By combining a lightweight and porous scaffold of electrospun polymer with a thinner separator, this article demonstrates a simultaneous improvement of ...
Lennart Wichmann, Bärbel Tengen, Peng Yan, Peter Lennartz, Isidora Cekic‐Laskovic, Martin Winter, Gunther Brunklaus   +6 more
wiley   +1 more source

Rare Helium-Bearing Compound FeO_{2}He Stabilized at Deep-Earth Conditions.

Physical Review Letters, 2018
There is compelling geochemical evidence for primordial helium trapped in Earth's lower mantle, but the origin and nature of the helium source remain elusive due to scarce knowledge on viable helium-bearing compounds that are extremely rare.
Jurong Zhang, Jian Lv, Hefei Li, Xiaolei Feng, Cheng-Liang Lu, Simon A. T. Redfern, Hanyu Liu, Changfeng Chen, Yanming Ma   +8 more
semanticscholar   +1 more source

Method and apparatus for generating coherent radiation in the ultra-violet region and above by use of distributed feedback [PDF]

, 1976
Helium in the superfluid state emits copious amounts of radiation in the ultraviolet region when excited by an electron stream. Conventional laser action using mirrors is impossible in superfluid helium because there are no mirrors that will reflect VUV ...
Saffren, M. M.
core   +1 more source