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Gaseous H2O has been detected in several cold astrophysical environments, where the observed abundances cannot be explained by thermal desorption of H2O ice or by H2O gas phase formation. These observations hence suggest an efficient…

Astrophysics · Physics 2011-02-11 Karin I. Oberg , Harold Linnartz , Ruud Visser , Ewine F. van Dishoeck

First principles based DFT calculations performed to insight structural and electronic properties of Boron doped Magnesium atom decorated graphene sheet for application of hydrogen storage. The four H2 molecules stably binds magnesium atom…

Materials Science · Physics 2020-03-31 Baliram Lone

Two-dimensional porous carbon nanomaterials are proven to be promising hydrogen storage substrates as they possess high surface area, large number of active sites, low molecular mass, and hydrogen molecules can be adsorbed on both sides of…

Materials Science · Physics 2023-12-05 Vikram Mahamiya , Alok Shukla , Brahmananda Chakraborty

The dipole force components in nano-sized metal hydrides are quantitatively determined with curvature and x-ray diffraction measurements. Ab-initio density functional theory is used to calculate the dipole components and the symmetry of the…

Mesoscale and Nanoscale Physics · Physics 2016-05-30 Gunnar K. Pálsson , Moritz Wälde , Martin Amft , Yuanyuan Wu , Martina Ahlberg , Max Wolff , Astrid Pundt , Björgvin Hjörvarsson

Graphene-based materials (GBMs) constitute a large family of materials which has attracted great interest for potential applications. In this work, we apply first-principles calculations based on density functional theory (DFT) and fully…

Materials Science · Physics 2021-05-05 Enesio Marinho , Pedro A. S. Autreto

The recent progress in the field of hydrogen storage in carbon and boron nitride nanostructures has been summarized. Carbon and boron nitride nanostructures are considered advantageous in this prospect due to their lightweight and high…

Applied Physics · Physics 2021-07-29 Y. T. Singh , B. Chettri , A. Banik , K. O. Obodo , D. P. Rai

Formamide (NH2CHO) and methylamine (CH3NH2) are known to be the most abundant amine-containing molecules in many astrophysical environments. The presence of these molecules in the gas phase may result from thermal desorption of interstellar…

Astrophysics of Galaxies · Physics 2018-05-02 Henda Chaabouni , Stephan Diana , Thanh Nguyen , François Dulieu

A novel concept of membrane process in thermal-driven system is proposed for water desalination. By means of molecular dynamics simulations, we show fast water transport through graphene galleries at a temperature gradient. Water molecules…

Soft Condensed Matter · Physics 2018-10-29 Bo Chen , Haifeng Jiang , Huidong Liu , Kang Liu , Xiang Liu , Xuejiao Hu

The laminated structure of graphene oxide (GO) confers unique interactions with water molecules which may be utilised in a range of applications that require materials with tuneable hygroscopic properties. Precise roles of the expandable…

Materials Science · Physics 2020-07-03 B. Lian , S. De Luca , Y. You , S. Alwarappan , M. Yoshimura , V. Sahajwalla , S. C. Smith , G. Leslie , R. K. Joshi

Dynamics of adsorption and desorption of (4S)-N on amorphous solid water are analyzed using molecular dynamics simulations. The underlying potential energy surface was provided by machine-learned interatomic potentials. Binding energies…

Astrophysics of Galaxies · Physics 2020-09-22 Germán Molpeceres , Viktor Zaverkin , Johannes Kästner

The wetting properties of graphene have proven controversial and difficult to assess. The presence of a graphene layer on top of a substrate does not significantly change the wetting properties of the solid substrate, suggesting that a…

Soft Condensed Matter · Physics 2017-02-10 Bijoyendra Bera , Noushine Shahidzadeh , Himanshu Mishra , Daniel Bonn

Optical properties of compressed fluid hydrogen in the region where dissociation and metallization is observed are computed by ab-initio methods and compared to recent experimental results. We confirm that above 3000 K both processes are…

Materials Science · Physics 2019-09-04 Giovanni Rillo , Miguel A. Morales , David M. Ceperley , Carlo Pierleoni

The adsorption of hydrogen on the polar Zn-ended ZnO(0001) surface has been investigated by density functional {\it ab-initio} calculations. An on top H(1x1) ordered overlayer with genuine H-Zn chemical bonds is shown to be energetically…

Materials Science · Physics 2015-05-13 N. Sanchez , S. Gallego , J. Cerdá , M. C. Muñoz

Ab initio calculations within the density-functional theory formalism are performed to investigate the ground state, electric charge doping, and electronic properties of titanium and titanium dioxide monolayers adsorbed on a graphene…

Materials Science · Physics 2013-01-17 Jozef Sivek , Ortwin Leenaerts , Bart Partoens , Francois Peeters

We report on the first measurement of the thermal conductivity of a suspended single layer graphene. The measurements were performed using a non-contact optical technique. The near room-temperature values of the thermal conductivity in the…

Materials Science · Physics 2008-03-15 A. A. Balandin , S. Ghosh , W. Bao , I. Calizo , D. Teweldebrhan , F. Miao , C. N. Lau

Geometry, stability, and thermal transport of graphene nanoquilts folded by hydrogenation are studied using molecular dynamics simulations. The hydrogenated graphene nanoquilts show increased thermodynamic stability and better transport…

Mesoscale and Nanoscale Physics · Physics 2016-01-20 Zhongwei Zhang , Yuee Xie , Qing Peng , Yuanping Chen

Magnesium hydride has great potential as a solid hydrogen (H) storage material because of its high H storage capacity of 7.6 wt%. However, its slow hydrogenation and dehydrogenation kinetics and the high temperature of 300 $^\circ$C…

Materials Science · Physics 2023-04-25 R. Kadono , M. Hiraishi , H. Okabe , A. Koda , T. U. Ito

The 3D nano-structuring on the <10nm scale allows the refractive index of functional sensory materials(n>2) to be reduced and matched with the cladding of optical fiber(n~1.46) for low-loss integration. A high temperature capable hydrogen…

Mesoscale and Nanoscale Physics · Physics 2015-08-05 Zsolt Poole , Paul Ohodnicki , Aidong Yan , Yuankun Lin , Kevin Chen

We report the successful passivation of the Mn acceptors in GaMnP upon exposure to a remote dc hydrogen plasma. The as-grown films are non-metallic and ferromagnetic with a Curie temperature of T_C=55K. After hydrogenation the sample…

Materials Science · Physics 2008-07-10 C. Bihler , M. Kraus , M. S. Brandt , S. T. B. Goennenwein , M. Opel , M. A. Scarpulla , R. Farshchi , O. D. Dubon

We observed an unexpected bending of a horizontally held palladium plate at 150$^{\circ}$C under a small external shearing stress. The deformation was fastest at the nominal composition of PdH$_{{\rm 0.1-0.2}}$, which is in the…

Materials Science · Physics 2015-03-17 Akio Kawasaki , Satoshi Itoh , Kunihiro Shima , Toshimitsu Yamazaki