Article
Thermodynamics
Akos Lakatos, Attila Csik, Istvan Csarnovics
Summary: This paper presents research results on the performance of aerogel materials in terms of thermal conductivity, specific heat, and combustion heat, providing important references for designers and researchers. The study found that temperature and external load significantly affect thermal conductivity, while thickness variations have minor impacts. Additionally, the combustion heat of aerogel was measured and investigated before and after combustion using advanced microscopy techniques.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Yiwei Ren, Qiang Yuan, Yanfei Kang, Like Wei, Zongze Li, Deyi Jiang, Huayong He, Hong Xu
Summary: Salt rock is a suitable parent rock for geological disposal of high level radioactive waste. This study measured the thermal conductivity, specific heat, and thermal diffusion coefficient of salt rock, and established models for these properties with temperature. The findings can provide reference for the construction of underground salt rock disposal repositories, and the temperature field evolution of the repository during operation was studied.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Thermodynamics
Anderson Gallego, Karen Cacua, Bernardo Herrera
Summary: This study evaluates the effect of using nanofluids on the thermal performance and capillary limit of a screen mesh heat pipe. The results show that nanofluids can decrease the thermal resistance but also reduce the capillary limit.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Jolanta Sobczak, Javier P. Vallejo, Julian Traciak, Samah Hamze, Jacek Fal, Patrice Estelle, Luis Lugo, Gawel Zyla
Summary: This study summarizes the experimental results on the thermophysical and electrical properties of ethylene glycol based nanofluids containing carbon black nanoparticles. The specific surface area was found to have a significant influence on the fundamental properties of nanofluids developed with carbon nanoparticles, with the enhancement of electrical conductivity being one of the highest reported in the literature.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Thermodynamics
Waqar Ahmed, Z. Z. Chowdhury, S. N. Kazi, Mohd Rafie Bin Johan, Ali H. Abdelrazek, H. Fayaz, Irfan Anjum Badruddin, M. A. Mujtaba, Manzoore Elahi M. Soudagar, Naveed Akram, Shahid Mehmood, Muhammad Shakeel Ahmad, Sarfaraz Kamangar, T. M. Yunus Khan
Summary: This study investigates the thermal and hydrodynamic characteristics of different concentrations of ZnO-DW nanofluids in a closed single-tube circular heat exchanger through experimental and ANSYS modeling methods. The results indicate that the 0.1% ZnO-DW based nanofluids exhibit the highest heat transfer coefficient and efficiency. Both experimental and numerical results show promising and similar outcomes.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Roberto Baccoli, Amit Kumar, Anna Concas, Gianluca Gatto, Nicola Pintus, Andrea Medda, Giuseppe Rodriguez
Summary: In this study, an original experimental device coupled with an optimization technique was developed to determine the thermal diffusivity of solid materials. The inverse problem of the classical Fourier heat equation was successfully solved using numerical supervision and an optimization procedure. The results show that incorporating heat loss corrections significantly improves the estimation of thermal diffusivity and increases the agreement with experimental data.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Environmental Sciences
Muthumari Perumal, Nilavuckkarasi R. Karunakaran, Ambedkar Balraj, Dhanalakshmi Jayaraman, Jagannathan Krishnan, Aalan Britto John Prakash, Jeevakumar Arumugam, Venkadeshwara Prabhu Muthukumar
Summary: The anthropogenic carbon dioxide (CO2) denseness in the earth's atmosphere is increasing day-to-day by combusting fossil fuels for power generation. Solvent-based carbon capture gained more attention towards researchers. Experimental studies revealed the interdependent eccentricities of the physical and chemical properties of different CO2-loaded solutions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Polymer Science
Hongwei Li, Martin Fauquignon, Marie Haddou, Christophe Schatz, Jean-Paul Chapel
Summary: The study systematically investigated the surface activity of polyelectrolyte complex (PECs) suspensions as a function of the molar charge ratio Z. It was found that the surface tension of PECs decreases as the system approaches charge stoichiometry. The behavior of complex systems at stoichiometry is informative about the physical nature of the complexes.
Article
Environmental Sciences
Aashish Sahu, Devi Prasad Mishra
Summary: This study measured the thermal properties of five coal samples at six different particle sizes using an advanced thermal property analyzer. The thermo-physical properties of coal dust were found to be positively correlated with the particle size and the ash percentage, bulk density, and specific gravity of coal dust. However, they were negatively correlated with the fixed carbon and volatile content of coal. Empirical relations between the thermo-physical properties were established. The thermal conductivity, diffusivity, and specific heat capacity of coal dusts varied within certain ranges, depending on the particle size and coal sample.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Berrin Tansel
Summary: This study examines the thermal properties of municipal solid waste (MSW) components and their impact on temperature increases in gas and leachate in landfills. The study finds that heat generated during waste decomposition primarily affects the temperature of the leachate. Most waste components have low thermal conductivities and low thermal diffusivities, resulting in significant temperature gradients during warming up and cooling off stages.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Mechanics
Valeria A. Dekhtyar, Alexander E. Dubinov
Summary: This paper experimentally studied the states of liquid drops on a horizontally elastic substrate that was cyclically stretched and weakened. A thin rubber band served as the substrate, and glycerin was used as the liquid. The study discovered a multi-branch hysteresis of the drop states, which could be adjusted by changing the time program for stretching and loosening the substrate tension.
Article
Construction & Building Technology
Karthik A. Sabapathy, Sateesh Gedupudi
Summary: This study designed a test room using straw as a construction material and evaluated its thermal and moisture diffusivities, providing a framework for thermal design of a straw envelope.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Huijuan Duan, Zuohui Cheng, Yongqiang Xue, Jinzhong Zhao, Meihong Yang, Zixiang Cui, Wenmei Gao, Shiyao Wang
Summary: The nano-effect plays a significant role in influencing the interfacial properties of nanoparticles, mainly consisting of the interfacial area effect and interfacial tension effect. As the particle size decreases, the nano-effect increases, leading to an increase in interfacial thermodynamic properties. When the radius is less than 10 nm, both interfacial area effect and interfacial tension effect impact the interfacial thermodynamic properties, resulting in deviations from linear relationships.
Article
Multidisciplinary Sciences
Sheng Lin, Long Zhang, Liang Cong
Summary: This study proposes a method for direct ink write printing of gallium-indium (Ga-In) alloys using micro-vibration-driven extrusion. Micro-vibration reduces the surface tension of Ga-In alloy droplets and avoids the appearance of random droplets during printing. By optimizing suitable micro-vibration parameters, the growth process of droplets is significantly slowed down, allowing for high moldability and improved printability of Ga-In alloy droplets.
SCIENTIFIC REPORTS
(2023)
Article
Construction & Building Technology
Huanan Yu, Changyun Shi, Guoping Qian, Xiangbing Gong
Summary: A novel test method was proposed in this study to accurately and conveniently determine the thermal parameters of asphalt mixture, and the effects of different air voids on the thermal diffusivity and parameters were evaluated.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Correction
Chemistry, Physical
Chen Luo, Yan Shao, Hua Yu, Hong-zhi Ma, Yu-hao Zhang, Long Gu, Bo Yin, Ming-bo Yang
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Stefano Borocci, Armando Camerlingo, Felice Grandinetti, Maria Rutigliano, Nico Sanna
Summary: The complexes of He, Ne, Ar, Kr, and Xe with B3N3H6 were investigated using MP2, CCSD(T), and SAPT ab initio methods. The complexes can be described as mono-, di-, and tri-coordinated to the N atoms, with stability following the order N-mono < N-di < N-tri. The interactions are dominated by dispersion and the binding energies are within the range of 1 or 2 kcal mol(-1). The results were compared with a recent DFT study on larger BN sheets complexes [Phys. Chem. Chem. Phys. 24 (2022) 2554-2566.].
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
V. Nagarajan, R. Bhuvaneswari, R. Chandiramouli
Summary: In this study, stable phosphoborane was used as a sensor to detect isobutane and n-propane in Liquefied Petroleum Gas (LPG). Phosphoborane demonstrated structural stability and semiconducting nature, and exhibited promising adsorption properties for the LPG molecules.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xiaoxi Xu, Zijiang Yang, Bayaer Buren, Maodu Chen
Summary: In this study, the time-dependent wave packet method was used to investigate the reaction channels and mechanisms of Ca+ + HD. The results show that the CaH+ + D reaction channel plays a primary role, which is consistent with experimental results. Complex forming and direct-abstraction reaction mechanisms exist in this reaction process.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Keshab Pandey, Hae Kyung Jeong
Summary: A free-standing silicon-carbon nanofiber composite film was synthesized and investigated for supercapacitor applications. It exhibited high specific capacitance, energy density, and power density. After 5000 cycles, the film showed excellent specific capacitance retention and Coulombic efficiency.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xinyu Zhang, Haosong Li, Xiaoyu Cao, Jing Gao, Yong Wei, Jianzhuo Zhu
Summary: The evaporation behavior of nanosized water aggregations on two-dimensional electroneutral solid surfaces with different surface polar unit densities was investigated. The results showed that the evaporation rate changes non-monotonically with the surface polar unit density, and the minimum evaporation rate is obtained when the surface has a modest surface polar unit ratio of 66.7%.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Yanyan Xu, Rui Dai, Xiaojie Wang, Zhijun Qiao, Haowei Wen, Dianbo Ruan, Yuzuo Wang
Summary: This article presents an innovative solvothermal sodium insertion method for synthesizing Triphylite-NaFePO4, which demonstrates optimal electrochemical performance in sodium-ion batteries.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Meiyi Jiang, Kun Yang, Yancheng Liu, Li Yao
Summary: The geometric structure and electronic properties of transition metal M (M = Cu, Fe, Mn)-TiO2 (101) surface adsorbed by NO2 and N2O were calculated by density functional theory (DFT) and DFT + U theory. The results showed that the adsorption of NO2 and N2O on Mn and Fe atoms is more stable, and a large number of active electrons are formed around these atoms, facilitating the catalytic reactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Sergey A. Vyrko, Yulia G. Polynskaya, Nikita A. Matsokin, Andrey M. Popov, Andrey A. Knizhnik, Nikolai A. Poklonski, Yurii E. Lozovik
Summary: In this study, carbon nanobracelets, which are cyclic molecules composed of alternating polycyclic regions and double carbon chains, were investigated using spin-polarized density functional theory. The results show that carbon nanobracelets with odd number of monomers exhibit distinct electronic energy levels, band gaps, and carbon chain deformation compared to those with even number of monomers.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Chanchan Wang, Quan Yang, Yanzhi Ding, Xiaoyong Lu, Dong Tian
Summary: It has been found that the introduction of buffer layers improves the electrical performance of solid oxide fuel cells (SSOFCs). In this study, varying ratios of Gd-doped CeO2 were used as buffer layers in YSZ-based SSOFCs. The results demonstrate that the performance of SSOFCs is enhanced when a buffer layer is added, with the highest performance achieved using Ce0.8Gd0.2O2-delta (GDC20) as the buffer layer. This suggests that the use of GDC series buffer layers is an attractive strategy to optimize performance loss due to electrolyte-electrode interactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Wang Li, Yi-Fan Zhang, Jia-Bin Huang, Chang-Yang Wang, Feng Zhang, Jiu-Zhong Yang, Long Zhao
Summary: The gas-phase reaction of propargyl with vinylacetylene was investigated using synchrotron photoionization and molecular-beam mass spectrometry methodologies. The formation mechanisms of the resulting cyclic structures were examined using quantum computations. Two previously unidentified isomers were detected and identified for the first time.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Avijit Pramanik, Sanchita Kundu, Olorunsola Praise Kolawole, Kaelin Gates, Paresh Chandra Ray
Summary: This study investigates the influence of aspect ratio and quantum confinement on the single-photon and two-photon absorption cross-section of perovskite CsPbI3 nanorods. Experimental data shows that CsPbI3 nanorods have an extremely high two-photon absorption cross-section, significantly surpassing organic chromophores and other CsPbBr3 nanocrystals. Moreover, adjusting the aspect ratio can significantly enhance the absorption ability. Additionally, the study also reveals a moderate quantum confinement effect on the single-photon and two-photon absorption cross-section of the nanorods.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Hyon-Tae Pak, Jin-A Choe, Kyong-Sik Ju, Yong -Son Rim
Summary: Drug-loaded cellulose diacetate (CDA) membranes were prepared using different compositions of mixed solvent. The microstructure and performance of the membranes were investigated, and a method to predict drug release properties was proposed. The results showed that the composition of the mixed solvent significantly affected the overall performance of CDA membranes, and the release rates of drugs were related to Δdelta and the intrinsic viscosity of CDA.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Gabriella E. Ravin, E. Curotto
Summary: We have developed a systematic approach to optimize the training set sizes for neural networks in fitting ab initio potential energy surfaces. Using this approach, we have constructed several spectroscopic quality potential energy surfaces for [Li(H2)n]+, n = 1 - 9. The ground state properties have been computed for all the systems and selected states.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Guohua Xu, Lei Xu, Feng Zhang, Chunling Yu, Yu Song
Summary: NiS1.03@Ni7S6/carbon composite was successfully prepared using corn stalk as a carbon source via a simple adsorption-sulphurization process. The composite exhibited a specific capacitance of 1554.6 F/g at 1 A/g as a supercapacitor electrode, with a capacitance retention rate of 80.4% after 5000 cycles. Furthermore, the NiS1.03@Ni7S6/carbon//AC asymmetric supercapacitor showed a high energy density of 41.2 Wh kg-1 at a power density of 750 W kg-1, and excellent cycling stability with 86.8% capacitance retention after 10,000 cycles.
CHEMICAL PHYSICS LETTERS
(2024)