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A theoretical comparison of the electronic excitation and ionisation behaviour of molecular hydrogen oriented either parallel or perpendicular to a linear polarised laser pulse is performed. The investigation is based on a non-perturbative…

Quantum Physics · Physics 2009-11-13 Yulian V. Vanne , Alejandro Saenz

Ions in water are important in biology, from molecules to organs. Classically, ions in water are treated as ideal noninteracting particles in a perfect gas. Excess free energy of ion was zero. Mathematics was not available to deal…

Biomolecules · Quantitative Biology 2015-06-15 Bob Eisenberg

Understanding the damage of DNA bases from hydrogen abstraction by free OH radicals is of particular importance to reveal the effect of hydroxyl radicals produced by the secondary effect of radiation. Previous studies address the problem…

Computational Physics · Physics 2016-09-28 Ramin M. Abolfath , P. K. Biswas , R. Rajnarayanam , Thomas Brabec , Reinhard Kodym , Lech Papiez

The development of intense high-energy radiation sources and the improvement of techniques for detecting charged fragments have made possible experiments on multiple ionization of a molecule with registration of the momentum and charge of…

The storage of hydrogen (H$_2$) is of economic and ecological relevance, because it could potentially replace petroleum-based fuels. However, H$_2$ storage at mild condition remains one of the bottlenecks for its widespread usage. In order…

Materials Science · Physics 2019-12-24 Srimanta Pakhira , Jose L. Mendoza-Cortes

Hydrogen recombination is one of the most important atomic processes in many astrophysical objects such as Type II supernova (SN~II) atmospheres, the high redshift universe during the cosmological recombination era, and H II regions in the…

Solar and Stellar Astrophysics · Physics 2015-05-18 Soma De , E. Baron , Peter H. Hauschildt

We employ a large scale molecular simulation based on bond-order ReaxFF to simulate the chemical reaction and study the damage to a large fragment of DNA-molecule in the solution by ionizing radiation. We illustrate that the randomly…

Biological Physics · Physics 2016-09-28 Ramin M. Abolfath , A. C. T. van Duin , Thomas Brabec

Given that there are 94 clinics and more than 200,000 patients treated worldwide, proton and carbon are the most used heavily charged particles in heavy ion therapy. However, there is a recent increasing trend in using new ion beams. Each…

Medical Physics · Physics 2021-01-26 Fatih Ekinci , Erkan Bostanci , Ozlem Dagli , Mehmet Serdar Guzel

Biomolecules couple to their aqueous environment through a variety of noncovalent interactions. Local structures at the surface of DNA and RNA are frequently determined by hydrogen bonds with water molecules, complemented by non-specific…

Chemical Physics · Physics 2019-09-10 Benjamin P. Fingerhut , Thomas Elsaesser

Anion exchange membranes are used in alkaline fuel cells and offer a promising alternative to the more expensive proton exchange membrane fuel cells. However, hydroxide ion conductivity in anion exchange membranes is low, and the quest for…

Soft Condensed Matter · Physics 2024-04-16 Mohammed Al Otmi , Ping Lin , William Schertzer , Coray M. Colina , Rampi Ramprasad , Janani Sampath

Cold atmospheric plasma (CAP) and plasma-treated liquids (PTLs) have recently become a promising option for cancer treatment, but the underlying mechanisms of the anti-cancer effect are still to a large extent unknown. Although hydrogen…

Molecular Networks · Quantitative Biology 2021-05-12 Charlotta Bengtson , Annemie Bogaerts

Plasma liquid interactions are important for a range of applications. For these, H$_2$O$_2$ and OH represent two key reactive species, whose concentrations in liquids need to be controlled for effective application outcomes. Here, a…

To investigate the gas-phase hydrogenation processes of large, astronomically relevant cationic polycyclic aromatic hydrocarbon (PAH) molecules under the interstellar environments, the ion-molecule collision reaction between six PAH cations…

Astrophysics of Galaxies · Physics 2024-05-28 Lijun Hua , Xiaoyi Hu , Junfeng Zhen , Xuejuan Yang

Belite -- dicalcium silicate Ca$_2$SiO$_4$ -- is a main constituent of low-carbon cement. In this work, we study several terminations of the (010) surface of $\gamma$-belite, its most stable polymorph, by molecular dynamics simulations. The…

Materials Science · Physics 2025-12-11 Bernadeta Prus , Jörg Behler

The interaction of phosphate groups with ions in an aqueous environment has a strong impact on the structure and folding processes of DNA and RNA. The dynamic variety of ionic arrangements, including both contact pairs and water separated…

Chemical Physics · Physics 2019-10-07 Jakob Schauss , Achintya Kundu , Benjamin P. Fingerhut , Thomas Elsaesser

Hydrogen peroxide (H2O2) stands as one of the foremost utilized oxidizing agents in modern times. The established method for its production involves the intricate and costly anthraquinone process. However, a promising alternative pathway is…

We suggest that the DNA molecules could form the cholesteric phase owing to an interaction mediated by the network of the hydrogen bonds (H-network) in the solvent. The model admits of the dependence of the optical activity of the solution…

Soft Condensed Matter · Physics 2009-10-31 V. L. Golo , E. I. Kats , Yu. M. Yevdokimov

The solvation structures and ion dynamics of CaCl$_2$ aqueous electrolytes have been investigated using ab initio molecular dynamics simulations and molecular dynamics simulations with deep learning potentials. We found multiple solvation…

Chemical Physics · Physics 2023-07-20 Zhou Yu , Lei Cheng

Atmospheric aerosols facilitate reactions between ambient gases and dissolved species. Here, we review our efforts to interrogate the uptake of these gases and the mechanisms of their reactions both theoretically and experimentally. We…

Chemical Physics · Physics 2023-06-27 David T. Limmer , Andreas W. Götz , Timothy H. Bertram , Gilbert M. Nathanson

Water, H$_2$O, is one of the fundamental molecules in chemistry, biology and astrophysics. It exists as two distinct nuclear-spin isomers, para- and ortho-water, which do not interconvert in isolated molecules. The experimental challenges…

Chemical Physics · Physics 2018-07-04 Ardita Kilaj , Hong Gao , Daniel Rösch , Uxia Rivero , Jochen Küpper , Stefan Willitsch