Article
Physics, Multidisciplinary
Norihiro Oyama, Hideyuki Mizuno, Atsushi Ikeda
Summary: This letter reports that the instantaneous normal modes with negative eigenvalues, or so-called imaginary modes, serve as the structural signatures for the Herschel-Bulkley rheology in sheared glasses, providing new insights into the structural origins of the Herschel-Bulkley law.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Ivan Kriuchevskyi, Timothy W. Sirk, Alessio Zaccone
Summary: In this study, a mathematical description of amorphous solid deformation and plasticity is presented by extending the concept of instantaneous normal modes (INMs) to deformed systems. The linear response theory is formulated by considering the strain-dependent tangent modulus, and the prediction shows good agreement with simulations.
Article
Physics, Multidisciplinary
Buxuan Li, Freddy DeAngelis, Gang Chen, Asegun Henry
Summary: In this study, lattice dynamics and molecular dynamics were used to analyze the thermal conductivity of amorphous polymers. An abnormally large population of localized modes was found, which is different from amorphous inorganic materials. The results suggest that localized modes play a key role in thermal transport for different polymers.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Matteo Baggioli, Alessio Zaccone
Summary: The study derives a theory of specific heat of liquids based on the vibrational density of states, explaining the typical decrease in specific heat with temperature and the correlation between liquid energy barriers and specific heat slopes. The findings demonstrate that the specific heat of liquids is controlled by instantaneous normal modes, providing a missing connection among anharmonicity, saddle points in the energy landscape, and the thermodynamics of liquids.
Article
Multidisciplinary Sciences
Kiumars Aryana, Derek A. Stewart, John T. Gaskins, Joyeeta Nag, John C. Read, David H. Olson, Michael K. Grobis, Patrick E. Hopkins
Summary: By systematically tailoring the cross-linking network among the atoms, the authors successfully suppressed the thermal transport in amorphous chalcogenide alloy SiTe, reducing the thermal conductivity by nearly an order of magnitude. The experimental results demonstrate that the ultralow thermal conductivity is attributed to the suppressed contribution of extended modes of vibration, particularly propagons and diffusons. This mechanism could potentially lead to significant advancements in thermal management for data storage and energy scavenging applications.
NATURE COMMUNICATIONS
(2021)
Article
Thermodynamics
A. Filatova-Zalewska, Z. Litwicki, A. Jezowski
Summary: An experimental setup for measuring the thermal conductivity of amorphous solids with glass transition temperature below 250K is presented. The setup allows heating the specimen to its melting point and then quickly cooling it to the glass transition temperature, with measurements conducted in the temperature range of 5K to 300K. Ethanol was used to verify the functionality of the setup by measuring its thermal conductivity in amorphous and polycrystalline states, with results agreeing well with literature data.
Article
Physics, Applied
Elmira M. Baeva, Nadezhda A. Titova, Louis Veyrat, Benjamin Sacepe, Alexander Semenov, Gregory N. Goltsman, Anna Kardakova, Vadim S. Khrapai
Summary: The research findings indicate that in thin films on amorphous insulating substrates, the relationship between the Joule power P2D and electron temperature Te is influenced by the length of the amorphous insulating layer, showing a linear temperature dependence related to thermal conductivity.
PHYSICAL REVIEW APPLIED
(2021)
Article
Spectroscopy
E. Benassi, H. Fan
Summary: This study revisited the vibrational normal modes of pyridine, focusing on the in-plane ring motion and analyzing the electronic structure through Quantum Chemical calculations and various dynamic methods. The aim of this investigation is to provide readers with a quantitative characterization of the RNMs of pyridine.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Hao Su, Xiangdong Li, Cheng Zhong, Di Mai, Wentao Liang, Ruijie Wang, Rucheng Dai, Zhongping Wang, Zengming Zhang
Summary: This paper investigates the phase evolution of pyridine using Raman modes, revealing that the phase transitions of pyridine are related to the number of loading and unloading cycles, and different phases of pyridine can be obtained by processing at different pressures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Energy & Fuels
Chandany Sen, Haoran Wang, Xinyuan Wu, Muhammad Umair Khan, Catherine Chan, Malcolm Abbott, Bram Hoex
Summary: Silicon heterojunction technology (HJT) is predicted to have a significant market share in the future. To achieve a low levelized cost of electricity (LCOE), HJT needs to initially have a high efficiency and degrade less than 0.5% per year. This study investigates the failure modes of silicon HJT glass-backsheet modules under damp heat conditions, identifying four distinct failure modes and their causes. Understanding and mitigating these failure modes at the solar cell level is crucial for HJT to reach its LCOE potential.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Thermodynamics
Majid Khan, S. Z. Shuja, B. S. Yilbas, H. Al-Qahtani
Summary: The design configuration of microchannel heat sinks is crucial for enhancing heat transfer efficiency. This study focuses on the innovative design of a 3D microchannel with turbulators and evaluates its thermal performance under various conditions. The findings suggest that the microchannel with turbulators located at 75% of the channel length with a pitch of 0.75 mm exhibits the highest thermal performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Dmytro Khomenko, David R. Reichman, Francesco Zamponi
Summary: The study found that although there is a notable spatial correlation between vibrational quasilocalized modes (QLMs) and tunneling two-level systems (TLSs), in general TLSs are strongly nonlinear, and their global properties cannot be predicted by a simple vibrational mode analysis.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Mathematics, Applied
Pooja Rani, Rajneesh Kumar, Geeta Partap
Summary: This study focuses on the wave analysis of porous thermoelastic plates with microtemperature, and investigates the impacts of porosity and microtemperature on wave characteristics through numerical calculations and graphical presentations.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Chemistry, Physical
Wilfried B. Holzapfel, Stefan Klotz
Summary: New data and evaluations provide a basis for the thermodynamic modeling of ice Ih, with the model accurately fitting experimental data and providing a basis for comparison with previous determinations.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)