Article
Thermodynamics
Shanchen Li, Chenchen Lu, Chao Zhang, Zhihui Li, Junhua Zhao, Jige Chen, Ning Wei
Summary: In this work, a model is proposed to investigate the effect of fluid flow on the thermal boundary conductance between solid and fluid using molecular dynamics simulations. The results show that controlling temperature by excluding velocity components along the flow direction is the best way to eliminate viscous temperature rise. Thermal conduction is insensitive to fluid flow in atomic-smooth channel, but highly dependent on flow velocity in rough channel, where the thermal boundary conductance decreases by 11.7% when flow velocity reaches 18 m/s. These findings reveal the influence of fluid flow on interfacial thermal exchange and provide insights for improving cooling systems based on microfluidics.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Nanoscience & Nanotechnology
C. Ulises Gonzalez-Valle, Bladimir Ramos-Alvarado
Summary: Engineering nano- and microscale systems for water filtration, drug delivery, and biosensing is enabled by the intrinsic interactions of ionic compounds in aqueous environments and limited by our understanding of these polar solid-liquid interfaces. Particularly, the fundamental understanding of the electrostatic properties of the inner pore surface of alumina nanoporous membranes could lead to performance enhancement for evaporation and filtration applications. This investigation reports on the modeling and characterization of the wettability and thermal transport properties of water-alumina interfaces. Abnormal droplet spreading was observed while using documented modeling parameters for water-alumina interfaces. This issue was attributed to the overestimation of Coulombic interactions and was corrected using reactive molecular dynamics simulations. The interfacial entropy change (from bulk to interface) of liquid molecules was calculated for different alumina surfaces. It was found that surfaces with high interfacial entropy change correlate with a high interfacial concentration of water molecules and a dominant contribution from in-plane modes to thermal transport. Conversely, highly mobile water molecules in low entropy interfaces concurred with the out-of-plane modes contributing the most to the energy transport. The hydroxyls on the passivated solid interface led to the formation of hydrogen bonds, and the density number of hydrogen bonds pe...
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Cecilia Herrero, Laurent Joly, Samy Merabia
Summary: This paper investigates the interfacial heat transfer between water and gold and proposes a method to increase the interfacial resistance by nanostructuring the gold surface and coating it with graphene. The results show a significant increase in the resistance compared to the planar gold situation. The predicted high thermal resistance makes this system a robust alternative to superhydrophobic materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Youngjun Ahn, Jiawei Zhang, Zhaodong Chu, Donald A. Walko, Stephan O. Hruszkewycz, Paul G. Evans, Eric E. Fullerton, Haidan Wen
Summary: Dynamical control of thermal transport at the nanoscale can be achieved through optically driven structural phase transitions, enabling ultrafast modulation of nanoscale thermal switches.
Article
Nanoscience & Nanotechnology
Ziyang Wang, Fangyuan Sun, Zihan Liu, Libing Zheng, Dazheng Wang, Yanhui Feng
Summary: In this study, the effect of interfacial roughness on the thermal boundary conductance (TBC) between copper and diamond is investigated using molecular dynamics simulations and time-domain thermoreflectance experiments. It is found that a rough interface improves thermal transport efficiency and increases TBC by 5.5 times compared to a flat interface. The phonon scattering probability increases with roughness and stabilizes gradually. Experimental measurements using time-domain thermoreflectance confirm the results of the simulations. This study provides a theoretical and experimental basis for roughness modification in interfacial thermal management and suggests a new approach for enhancing the thermal conductivity of composites.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Menghao Yang, Yifei Mo
Summary: The text discusses the interface issues between Li metal anode and solid electrolyte in solid-state batteries, revealing the harmful effects of the interfacial defect Li layer on battery performance. It also explores how interfaces with good lattice coherence can reduce Li defects and suppress interface failure.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Qing-Xiang Pei, Jun-Yan Guo, Ady Suwardi, Gang Zhang
Summary: In this study, the phonon interfacial thermal conductance (ITC) in Bi2Te3/Au and Bi2Te3/Cu was investigated using non-equilibrium molecular dynamics simulations. It was found that the ITC in Bi2Te3/Cu is 3-fold higher than that in Bi2Te3/Au. Both the stronger interfacial van der Waals interaction and phonon coupling were found to contribute to the higher ITC in Bi2Te3/Cu. Furthermore, the ITC of Bi2Te3/Au and Bi2Te3/Cu can be effectively tuned by mechanical strain, with a 0.04 compressive strain leading to a 120% and 62% increase in ITC, respectively.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Sreya Sarkar, Mohamad Jafari Gukeh, Tamal Roy, Harshad Gaikwad, Francesco Maria Bellussi, Shashwata Moitra, Constantine M. Megaridis
Summary: The interfacial energy between a solid and a liquid plays a crucial role in determining the macroscopic wettability of the surface by the fluid and is essential for controlling fluid-transport phenomena in commercial devices/products. While there are indirect or theoretical methods to quantify this energy, there is a lack of direct experimental procedures for measuring it on realistic rough surfaces. This study proposes a methodology that utilizes dynamic contact-angle experiments on rough surfaces to determine the interfacial energy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Zhenyu Wang, Shangwei Sun, Yifan Cui, Ran Ran, Yongzhi Zhao
Summary: The slip flow molecular dynamics model was established to investigate the water-solid interfacial thermal conductance, revealing the relationship between the values of interfacial thermal conductance of different materials and the slip shear velocity.
Article
Chemistry, Physical
Weidong Zheng, Cheng Shao, Qi Wang, Guojun Li, Hongkun Li
Summary: This review provides a comprehensive and critical examination of the recent advances and issues in the interfacial thermal conductance (ITC) of two-dimensional (2D) materials. It covers theoretical concepts, experimental and computational techniques, as well as understanding of heat transport mechanisms across 2D material interfaces. The review highlights the discrepancies in prior studies by compiling the reported values of ITC and discusses future research directions.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Dan Wu, Hua Ding, Zhi-Qiang Fan, Pin-Zhen Jia, Hai-Qing Xie, Xue-Kun Chen
Summary: Gallium nitride (GaN)-based high-electron-mobility transistors (HEMTs) are of interest for high-power and high-frequency electronics applications, with the thermal management issue being a key focus. Research has shown that integrating multilayer graphene with GaN can significantly enhance the interfacial thermal conductance (ITC) across their interface. Factors such as point-defect concentration, external pressure, temperature, and h-BN intercalation can regulate ITC, providing important guidelines for improving device performance and reliability.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Joon Sang Kang, Man Li, Huan Wu, Huuduy Nguyen, Toshihiro Aoki, Yongjie Hu
Summary: Thermal management is crucial in electronic systems, and the integration of novel semiconductor materials like boron arsenide and boron phosphide with other materials such as gallium nitride can significantly improve cooling performance and reduce hot-spot temperatures in high-electron-mobility transistors.
NATURE ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Manuel R. Uhlig, Ricardo Garcia
Summary: The research found that the hydration layer structure of capillary condensation phenomenon at the nanoscale is independent of the water volume for crystalline surfaces.
Article
Thermodynamics
Yoshitaka Ueki, Satoshi Matsuo, Masahiko Shibahara
Summary: This study investigated the influence of nanotextured surface geometry on the interfacial thermal resistance (ITR) between hydrophilic solid walls and water/ice using molecular dynamics simulations. The results showed that narrower nanostructure gaps led to decreased ITR. Particularly, when H2O molecules were in the crystal form, the local ITR significantly increased.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Nanoscience & Nanotechnology
Prabudhya Roy Chowdhury, Jingjing Shi, Tianli Feng, Xiulin Ruan
Summary: Bismuth telluride (Bi2Te3) and its alloys with antimony telluride (Sb2Te3) are known as the best thermoelectric materials at room temperature. Recent studies have shown high thermoelectric performance in Bi2Te3-Sb2Te3 nanostructures, but computational studies on phonon transport across these nanostructures are limited.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Thermodynamics
Hiroki Matsubara, Gota Kikugawa, Taku Ohara
Summary: This study used molecular dynamics simulation to analyze the mechanisms of high thermal conductivity in water and ammonia at the molecular scale, revealing that heat transfer via Coulomb interaction is the primary factor due to the high density of heat paths in both liquids.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Polymer Science
Nobuyuki Odagiri, Keiichi Shirasu, Yoshiaki Kawagoe, Gota Kikugawa, Yutaka Oya, Naoki Kishimoto, Fumio S. Ohuchi, Tomonaga Okabe
Summary: The study reveals that higher stoichiometric ratio samples enhance material ductility, while lower stoichiometric ratio samples primarily exhibit branched molecular structures.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Yuting Guo, Donatas Surblys, Hiroki Matsubara, Taku Ohara
Summary: In this study, the effects of the number and position of functional groups, as well as the length of main and side chains in organic surfactants on adsorption behavior and interfacial heat transfer were investigated through molecular dynamics simulation. It was found that these factors influenced the heat transfer efficiency at the solid-liquid interface. The results provide insights for designing more effective surfactants to enhance interfacial heat transfer.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Multidisciplinary
Xiaoxin Yan, Haibo Zhao, Yanhui Feng, Lin Qiu, Lin Lin, Xinxin Zhang, Taku Ohara
Summary: The study introduced a novel erythritol/graphene composite phase change material, which was found to enhance thermal conductivity and reduce supercooling degree. By adjusting the mass fraction, size, and number of layers of graphene, the melting point of erythritol can be effectively controlled, providing guidance for the design and application of erythritol-based composite phase change materials.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Physical
Hiroki Matsubara, Donatas Surblys, Yunhao Bao, Taku Ohara
Summary: In this study, non-equilibrium molecular dynamics simulation was used to investigate the effect of surfactants on interfacial thermal transport at solid-liquid interfaces. It was found that interfacial thermal resistance can be minimized by optimizing the vibrational characteristics of surfactant molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Multidisciplinary
Huachao Deng, Yoshiaki Kawagoe, Yoshiaki Abe, Kenjiro Terada, Tomonaga Okabe
Summary: This study proposes a generalized coordinate smoothed particle hydrodynamics (GCSPH) method coupled with an overset method using the total Lagrangian formulation for solving large deformation and crack propagation problems. GCSPH effectively reduces the computational cost and eliminates the effects of particle arrangement. Validation is provided through numerical cases.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Chemistry, Physical
Yinbo Zhao, Gota Kikugawa, Yoshiaki Kawagoe, Keiichi Shirasu, Naoki Kishimoto, Yingxiao Xi, Tomonaga Okabe
Summary: This study developed a new algorithm that combines distance-based and kinetic criteria to study the cross-linking process of epoxy resins. Using the large-scale atomic/molecular massively parallel simulator (LAMMPS), the effect of model size on the thermomechanical properties of epoxy resins was investigated, providing general guidelines for simulation system size and procedures.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Donatas Surblys, Florian Mueller-Plathe, Taku Ohara
Summary: Recently, a new method has been developed to calculate the work of adhesion of solid-liquid interfaces using molecular dynamics and thermodynamic integration. However, when there are long-range Coulombic interactions in the interface, special treatment is required. In this study, the researchers replaced the long-range Coulombic interactions with damped Coulomb interactions and explored several thermal integration paths. They found that regardless of the integration path, as long as it is reversible, the same work of adhesion values are obtained, but the numerical efficiency differs greatly.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Yoshiaki Kawagoe, Kenji Kawai, Yuta Kumagai, Keiichi Shirasu, Gota Kikugawa, Tomonaga Okabe
Summary: A multiscale modeling approach was developed to predict the manufacturing-process-induced deformation of carbon-fiber-reinforced plastic laminates, by evaluating thermomechanical properties using MD simulations and quantum calculations, and by using FEA to predict deformation at different scales. The results matched well with fabrication experiments and investigated the effects of matrix resin selection on process-induced behaviors.
MECHANICS OF MATERIALS
(2022)
Article
Polymer Science
Tomohiro Miyata, Yoshiaki Kawagoe, Tomonaga Okabe, Hiroshi Jinnai
Summary: This study investigates the structure and adsorption phenomenon of polymer chains on nanoparticles, revealing the unique morphology and mechanism of the adsorption through microscopic observation and molecular dynamics simulations. The results reveal the characteristics of polymer chain adsorption on nanoparticles and highlight the importance of conformational entropy in determining the adsorption morphology.
Article
Thermodynamics
Haiyi Sun, Donatas Surblys, Hiroki Matsubara, Taku Ohara
Summary: The understanding of interfacial heat transfer mechanism is increasingly important in thermal management due to the role of interfacial thermal resistance as electronic devices reduce in size. This study used molecular dynamics to investigate interfacial heat transfer between diverse silica surfaces and two organic liquids: triacontane and triacontanol. Silica surfaces with silanols showed better thermal transport ability with triacontane/triacontanol due to a vibration matching effect. The increase of silanol area number density enhanced interfacial heat transfer for silica-triacontanol systems, but had little effect on silica-triacontane systems. Moreover, temperature significantly affected the interfacial heat transfer of silica-triacontanol systems, reducing the number and lifetime of hydrogen bonds.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Physics, Fluids & Plasmas
Hiroki Matsubara, Donatas Surblys, Taku Ohara
Summary: A recent study revealed that interfacial thermal resistance at solid-liquid interfaces can be minimized by adjusting the molecular mass of the surfactant. This study utilized a one-dimensional harmonic chain model and the nonequilibrium Green's function method to explain the mechanism of thermal resistance minimization, and established the relationship between thermal resistance and vibrational density of states overlap.
Article
Chemistry, Physical
Yoshiaki Kawagoe, Gota Kikugawa, Keiichi Shirasu, Tomonaga Okabe
Summary: A new curing simulation technique using dissipative particle dynamics simulation is proposed, which can more accurately simulate the reaction process of thermoset resin with significantly reduced runtime and computational resources. Reverse mapping allows for reconstruction of the AA-MD system, with the reconstructed system showing high agreement with experimental results.
Article
Chemistry, Physical
Hiroki Matsubara, Taku Ohara
Summary: The study demonstrates that the in-plane aspect ratio of nanographene fillers significantly affects the thermal conductivity of paraffin/graphene composites. Fillers with a higher aspect ratio lead to a greater enhancement in thermal conductivity due to the restriction on filler orientation during aggregation, resulting in highly ordered agglomerates. The findings suggest the potential for customizing filler shapes to control the aggregation structure and improve heat conduction characteristics in nanocomposites.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Correction
Engineering, Electrical & Electronic
Xiao Liu, Donatas Surblys, Yoshiaki Kawagoe, Abdul Rafeq Bin Saleman, Hiroki Matsubara, Gota Kikugawa
MICRO AND NANO ENGINEERING
(2021)