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A hydrated 1,2-dimyristoyl-sn-glycero-3-phosphorylcholine (DMPC) lipid membrane is investigated using an all atom molecular dynamics simulation at 308K to find out the physical sources of universal slow relaxation of hydration layers.…

Soft Condensed Matter · Physics 2018-08-14 Abhinav Srivastava , Smarajit Karmakar , Ananya Debnath

Favourable band alignment and excellent visible light response are vital for photochemical water splitting. In this work, we have theoretically investigated how ferroelectric polarization and its reversibility in direction can be utilized…

Applied Physics · Physics 2020-09-03 Dimuthu Wijethunge , Lei Zhang , Cheng Tang , Aijun Du

Experiments in bulk water confirm the existence of two local arrangements of water molecules with different densities, but, because of inevitable freezing at low temperature $T$, can not ascertain whether the two arrangements separate in…

The paper presents an analytical theory and numerical simulations of the dipolar response of hydrated proteins. The effective dielectric constant of the solvated protein, representing the average dipole moment induced at the protein by a…

Biological Physics · Physics 2015-05-30 Dmitry V. Matyushov

A radiative transfer method for the treatment of molecular lines is presented. We apply this method to previous SWAS and ISO observations of water vapor in the source S140 in order to make models to plan for, and to interpret, HIFI data.…

Astrophysics · Physics 2009-11-11 D. R. Poelman , M. Spaans

Automated segmentation of white matter hyperintensities (WMHs) is an essential step in neuroimaging analysis of Magnetic Resonance Imaging (MRI). Fluid Attenuated Inversion Recovery (FLAIR-weighted) is an MRI contrast that is particularly…

Image and Video Processing · Electrical Eng. & Systems 2023-05-15 Martin Soria Røvang , Per Selnes , Bradley John MacIntosh , Inge Rasmus Groote , Lene Paalhaugen , Sudre Carole , Tormod Fladby , Atle Bjørnerud

In molecular simulations, neural network force fields aim at achieving \emph{ab initio} accuracy with reduced computational cost. This work introduces enhancements to the Deep Potential network architecture, integrating a message-passing…

Computational Physics · Physics 2024-04-09 Ruiqi Gao , Yifan Li , Roberto Car

Water is a notoriously difficult substance to model both accurately and efficiently. Here, we focus on descriptions with a single coarse-grained particle per molecule using the so-called Approximate Non-Conformal (ANC) and generalized…

Soft Condensed Matter · Physics 2017-10-25 Tonalli Rodríguez-López , Yuriy Khalak , Mikko Karttunen

We present results from an instrument combining surface acoustic wave (SAW) propagation and surface plasmon resonance (SPR) measurements. The objective is to use two independent methods, the former based on adsorbed mass change measurements…

Soft Condensed Matter · Physics 2009-11-10 J. -M. Friedt , L. Francis , G. Reekmans , R. De Palma , A. Campitelli , U. B. Sleytr

Materials with large second-order nonlinearities are crucial for next-generation integrated photonics. Spontaneously oriented organic thin films prepared by physical vapor deposition offer a promising poling-free and scalable approach. This…

Non-monotonic retention profiles (NRP) have been observed in numerous studies of colloidal-nano flows in porous media. For the first time, we explain the phenomenon by distributed particle properties (size, shape, surface charge). We…

Soft Condensed Matter · Physics 2019-05-21 Gabriel Malgaresi , Ben Collins , Paul Alvaro , Pavel Bedrikovetsky

Polymers at the interface exhibit frustrated chain conformation distinct from the bulk, impacting particle dispersion and properties of polymer nanocomposites (PNCs). Utilizing bimodal molecular weight (MW) PNCs, we observed unusual chain…

Soft Condensed Matter · Physics 2025-01-14 Tae Yeon Kong , So Youn Kim

During the growth of anodic Al oxide layers water incorporates in the film and therefore influences the intrinsic properties of the oxide formed. In this study, we propose a new approach, based on the use of high-resolution neutron imaging,…

Applied Physics · Physics 2020-07-15 Noemie Ott , Claudia Cancellieri , Pavel Trtik , Patrik Schmutz

The primary challenge in accelerating image super-resolution lies in reducing computation while maintaining performance and adaptability. Motivated by the observation that high-frequency regions (e.g., edges and textures) are most critical…

Computer Vision and Pattern Recognition · Computer Science 2025-05-13 Wei Shang , Dongwei Ren , Wanying Zhang , Pengfei Zhu , Qinghua Hu , Wangmeng Zuo

Understanding the hydration and diffusion of ions in water at the molecular level is a topic of widespread importance. The ammonium ion (NH$_4^+$) is an exemplar system that has received attention for decades because of its complex…

Computational Physics · Physics 2025-01-14 Jianqing Guo , Liying Zhou , Andrea Zen , Angelos Michaelides , Xifan Wu , Enge Wang , Limei Xu , Ji Chen

Energy redistribution after a chemical reaction is one of the few mechanisms to explain the diffusion and desorption of molecules which require more energy than the thermal energy available in quiescent molecular clouds (10 K). This energy…

Astrophysics of Galaxies · Physics 2023-05-10 Germán Molpeceres , Viktor Zaverkin , Kenji Furuya , Yuri Aikawa , Johannes Kästner

We use Molecular Dynamics simulations to study how the nanopore and the fluid structures affects the dynamic, thermodynamic and structural properties of a confined anomalous fluid. The fluid is modeled using an effective pair potential…

Soft Condensed Matter · Physics 2015-06-23 Leandro B. Krott , José Rafael Bordin , Ney Marçal Barraz , Marcia C. Barbosa

When water molecules are confined to nanoscale spacings, such as in the nanometer size pores of activated carbon fiber (ACF), their freezing point gets suppressed down to very low temperatures ($\sim$ 150 K), leading to a metastable liquid…

Soft Condensed Matter · Physics 2015-06-23 S. O. Diallo , L. Vlcek , E. Mamontov , J. K. Keum , Jihua Chen , J. S. Hayes , A. A. Chialvo

A sequential of concepts developed in last decade has enabled a resolution to multiple anomalies of water ice and its low-dimensionality, particularly. Developed concepts include the coupled hydrogen bond oscillator pair, segmental specific…

Soft Condensed Matter · Physics 2020-06-17 Chang Q Sun

We study DNA adsorption and renaturation in a water-phenol two-phase system, with or without shaking. In very dilute solutions, single-stranded DNA is adsorbed at the interface in a salt-dependent manner. At high salt concentrations the…

Biomolecules · Quantitative Biology 2009-11-10 Arach Goldar , Jean-Louis Sikorav