Article
Astronomy & Astrophysics
K. Yanase, N. Shimizu, K. Higashiyama, N. Yoshinaga
Summary: We studied the nuclear Schiff moments of 129Xe and 199Hg induced by the nucleon electric dipole moment using large-scale shell model calculations. We found a linear relation between the leading-order contribution and magnetic moment in 129Xe, which can help reduce theoretical uncertainty. We also evaluated the influence of relevant single-particle orbitals outside the conventional model space using the quasiparticle vacua shell model method.
Article
Engineering, Chemical
Jiawen Zheng, Weidong He, Yinghe Guo, Ruiqing Shen, Jingxian Liu
Summary: This study investigates the effects of purified tourmaline (TM) samples of three sizes on air filters, taking into account its unique spontaneous polarization. The results reveal that an electrode from 0.074 mm separated TM exhibits superior performance. Furthermore, when three types of TM powders with the highest B2O3% content are adhered to the filters, Elbaite 0.074 mm with 9.34% B2O3 content demonstrates optimal filtration efficiency with a slight increase in pressure drop. The crystal structure is refined using the Rietveld method based on X-ray diffraction patterns of the samples, and the electrostatic adsorption caused by TM spontaneous polarization enhances the filtration property of the filter materials.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Astronomy & Astrophysics
J. Alfonso Ahuatzi-Avendano, Javier Montano, Hector Novales-Sanchez, Monica Salinas, J. Jesus Toscano
Summary: This study explores the impact of Lorentz violation on the electromagnetic moments of charged leptons, deriving strict bounds under different scenarios through calculation and estimation. By considering various parameter configurations, the Lorentz violation effects are analyzed and constrained. Lorentz violation may result in various constraints, including upper bounds on the electromagnetic moments of electrons, muons, and tau-leptons.
Article
Construction & Building Technology
Gul Badin, Naveed Ahmad, Hafiz Muhammad Ali, Tufail Ahmad, Muhammad Sohail Jameel
Summary: The study confirmed that changing the color of asphalt and asphalt mixtures using coloring additives can improve their performance at high temperatures, reduce surface temperatures, increase permanent deformation resistance, without compromising low-temperature fatigue properties and moisture resistance/adhesion.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Thermodynamics
Nurettin Sezer, Shoukat Alim Khan, Yusuf Bider, Muammer Kod
Summary: With the continuous trend of miniaturization in the electronics sector, high heat flux management is becoming increasingly important. In this research, a coating of interconnected porous network of silver nano-wires was found to enhance the nucleate boiling performance. The concentration of silver nanowires-based nanofluids showed a significant impact on the critical heat flux and heat transfer coefficient.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yiqiao Wang, Yu Xie, Shuohan Yu, Kai Yang, Yi Shao, Laixi Zou, Boxiao Zhao, Zilin Wang, Yun Ling, Yong Chen
Summary: In this study, Ni has been successfully doped in the unit cell of BiOBr, increasing the unit cell dipole moment and enhancing the photocatalytic performance for CO2 reduction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Astronomy & Astrophysics
Zhanibek Omarov, Hooman Davoudiasl, Selcuk Hacromeroglu, Valeri Lebedev, William M. Morse, Yannis K. Semertzidis, Alexander J. Silenko, Edward J. Stephenson, Riad Suleiman
Summary: This segment provides a brief overview of the Symmetric-Hybrid ring design for the storage ring proton electric dipole moment experiment, highlighting critical issues and the advancements made in reducing systematic errors and aligning the ring within available technology.
Article
Thermodynamics
Ismael Sanchez-Calderon, Beatriz Merillas, Victoria Bernardo, Miguel Angel Rodriguez-Perez
Summary: Developing advanced, highly insulating materials for reducing heat losses in buildings is crucial. A new methodology for measuring the thermal conductivity of small prototypes of thermal insulating materials has been developed and validated in this study. The results demonstrate the accuracy of the self-developed method in determining the thermal conductivity of samples with small dimensions using a steady-state condition.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Mayowa I. Omisanya, Zhihao Chen, Yoshio Utaka
Summary: Flow boiling heat transfer was studied using a different-mode-interacting boiling (DMIB) method to enhance critical heat flux (CHF) and heat transfer coefficient (HTC). The nonuniform surfaces were found to significantly improve CHF under certain conditions, showing the potential for enhanced performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Tengteng Yang, Wangen Zhao, Xin Liu, Shengzhong (Frank) Liu
Summary: By designing polar molecules with permanent dipole moments, the surface termination of organic-inorganic hybrid perovskite materials can be modified. The proper interfacial design significantly reduces trap state density, allowing for effective charge transfer. The energy level of the substrate can be adjusted by the magnitude and direction of the dipole moment. As a result, introducing pentafluoride benzene moieties with carboxylic functional groups achieves a high photo-electric conversion efficiency of 24.54% and improves the humidity and heat stability of the perovskite device. This work demonstrates the importance of chemical interactions at perovskite termination and paves the way for further enhancing the performance of perovskite solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jing-Jing Wang, Xiaoyu Mao, Jun-Nan Yang, Yi-Chen Yin, Ji-Song Yao, Li-Zhe Feng, Feng Zhu, Cheng Ma, Cui Yang, Gang Zou, Guozhen Zhang, Hualing Zeng, Hong-Bin Yao
Summary: Polarization, as a fundamental property of light, has a significant impact in quantum optics and optoelectronics through light-matter interactions. This study reports the achievement of bright and near-unity linearly polarized light emissions using well-defined quasi two-dimensional (2D) hybrid crystals based on Cu2I2-dimer/bidentate ligand hybrid clusters. Fabrication of Cu2I2-dimer-based hybrid nanobelts further enhances the photoluminescence (PL) polarization degree.
Article
Thermodynamics
Avinash Upadhyay, Brijesh Kumar, Nirbhay Kumar, Rishi Raj
Summary: Two-phase heat transfer processes such as boiling are essential for waste heat management. This study proposes a simple and reliable strategy using aqueous solutions of imidazolium ionic liquids (ImILs) to enhance the critical heat flux (CHF) and heat transfer coefficient (HTC) by improving heater surface wettability. Experimental results show that this method can increase CHF by approximately 1.6 times. The ability to manipulate the surface and fluid properties by tuning the structure of ImILs makes this approach promising for thermal management challenges.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Yaroslav Bazel, Jan Toth, Maksym Fizer, Vasyl Sidey, Ioseph Balogh
Summary: The solvatochromic effect of solvents on the absorption and fluorescence spectra of three carbocyanine dyes was investigated, estimating the experimental dipole moments and examining the influence of solvation effect on luminescence quantum yields. Comparison of fluorescence signal enhancement sensitivities and analysis of electron transitions in absorption and excitation processes were also conducted. Dyes' specific behavior in glycerol medium was interpreted via analysis of non-covalent interactions between the dye and glycerol molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Review
Thermodynamics
Raj Patel, Michael Meyer, Jason Hartwig, Issam Mudawar
Summary: Despite the lack of a reliable cryogenic pool boiling CHF database, this study compiles a new consolidated database and develops new powerful tools for designing cryogenic space systems based on the assessment of previous models and correlations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Optics
S. D. Chekhovskoi, D. V. Chubukov, L. V. Skripnikov, A. N. Petrov, L. N. Labzowsky
Summary: This paper discusses the mechanisms of the P, T-odd Faraday effect (PTFE), analyzing the possible existence of an atomic-level-mixing mechanism in addition to the linear Stark splitting mechanism. The analysis shows that with heavy diatomic molecules, particularly PbF, the contribution of the atomic-level-mixing mechanism may exceed that of the linear Stark splitting mechanism, making PbF a promising candidate for experiments studying P, T-odd effects.
Article
Chemistry, Physical
Keith T. Butler, Pia Vervoorts, Michael G. Ehrenreich, Jeff Armstrong, Jonathan M. Skelton, Gregor Kieslich
CHEMISTRY OF MATERIALS
(2019)
Article
Chemistry, Physical
Stanislav Filippov, Jakob B. Grinderslev, Mikael S. Andersson, Jeff Armstrong, Maths Karlsson, Torben R. Jensen, Johan Klarbring, Sergei I. Simak, Ulrich Haussermann
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
Alexander Rosu-Finsen, Alfred Amon, Jeff Armstrong, Felix Fernandez-Alonso, Christoph G. Salzmann
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Chemistry, Physical
Jeff Armstrong, Samya Banerjee, Volker Schuenemann, Juliusz A. Wolny, Peter J. Sadler
Summary: In this study, it was found that [(Pentamethylcyclopentadienyl)Rh(III)(bipyridine)(chloride)](+) (Cp*Rh-Cl) undergoes sequential deuteriation in polar deuterated solvents. The use of INS and DFT methods allowed for an exploration of vibration changes along the reaction path and the impact of vibrational energy on the reaction rate.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Magnus M. Nygard, Oystein S. Fjellvag, Magnus H. Sorby, Kouji Sakaki, Kazutaka Ikeda, Jeff Armstrong, Ponniah Vajeeston, Wojciech A. Slawinski, Hyunjeong Kim, Akihiko Machida, Yumiko Nakamura, Bjorn C. Hauback
Summary: The study investigated the local structure in TiVCrNbDx to explore how to destabilize the remaining sites with respect to hydrogen/deuterium occupation. The analysis revealed a body-centred tetragonal structure for partially desorbed deuteride (x = 2.2), with a higher portion of occupied sites with low valence-electron concentration. Further strategies for destabilization of the hydride were motivated based on these observations.
Article
Chemistry, Physical
Kacper Druzbicki, Rasmus Laven, Jeff Armstrong, Lorenzo Malavasi, Felix Fernandez-Alonso, Maths Karlsson
Summary: The vibrational dynamics of pure and methylammonium-doped formamidinium lead iodide perovskites have been investigated using high-resolution neutron spectroscopy. The experiments provide direct evidence of low-temperature orientational glass formation and shed light on the physicochemical origin of phase metastability in tetragonal structures. The findings also suggest that doping with small amounts of organic cations can strengthen hydrogen-bonding interactions while weakening methylammonium interactions in the perovskite framework.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Gustav Ek, Oystein S. Fjellvag, Ponniah Vajeeston, Jeff Armstrong, Martin Sahlberg, Ulrich Haussermann
Summary: The study investigates the vibrational properties of HEA-based metal hydrides using inelastic neutron scattering, revealing the presence of hydrogen atoms at both tetrahedral and octahedral sites in the structure. This unique vibrational behavior is attributed to the differences in atomic radii leading to internal strain within the disordered lattice of HEAs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Physics, Multidisciplinary
Jeff Armstrong
Summary: Classical molecular dynamics is essential in understanding various phenomena in physical chemistry, and accurate parameterisation of force-fields is crucial for its legitimacy. This article discusses a less commonly used approach to parameterisation - neutron spectroscopy, particularly quasi-elastic neutron spectroscopy, which provides self-correlation information for hydrogen atoms in organic systems. The article focuses on the parameterisation of models for porous and surface catalysts.
JOURNAL OF PHYSICS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Katie S. C. Morton, Alin M. Elena, Jeff Armstrong, Alexander J. O'Malley
Summary: The dynamics of liquid para-cresol were investigated in the temperature range of 340-390 K using tandem quasielastic neutron scattering and molecular dynamics simulations. Both translation jump diffusion and isotropic rotation were observed, with corresponding diffusion coefficients and rotational rates measured. The molecular dynamics simulations provided similar results to the experimental data, and the OPLS3 model showed slower dynamics likely due to higher molecular polarity and stronger hydrogen bonding.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Correction
Chemistry, Physical
Jeff Armstrong, Samya Banerjee, Volker Schunemann, Juliusz A. Wolny, Peter J. Sadler
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Mohamed Aouane, Jeff Armstrong, Mark Walkey, Gabriela Hoffman, George R. Bacanu, Richard J. Whitby, Malcolm H. Levitt, Stephane Rols
Summary: The confining potential of the He-3@C-60 endofullerene, which consists of a He-3 atom trapped inside a C-60 fullerene cage, is investigated using inelastic neutron scattering. The dynamical structure factor S(Q, omega), which provides information on energy and momentum transfers, is measured and simulated using a spherical anharmonic oscillator model, with good agreement between the experimental and simulated data sets.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Jeff Armstrong, Keith T. Butler, Matthew R. Ryder
JOURNAL OF PHYSICS COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Antony Nearchou, Jeff Armstrong, Keith T. Butler, Paul R. Raithby, Asel Sartbaeva
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Review
Physics, Multidisciplinary
Jeff Armstrong, Alexander J. O'Malley, Matthew R. Ryder, Keith T. Butler
JOURNAL OF PHYSICS COMMUNICATIONS
(2020)
Article
Physics, Multidisciplinary
Oystein S. Fjellvag, Matthew Krzystyniak, Ponniah Vajeeston, Anja O. Sjastad, Jeff Armstrong
JOURNAL OF PHYSICS COMMUNICATIONS
(2019)