Article
Energy & Fuels
Wang Weiyang, Zhou Chenru, Liu Chenwei, Wang Zhiyuan, Li Mingzhong
Summary: This study investigated the interaction behaviors of hydrate particle-particle/droplet and hydrate deposition-pipe wall in the cyclopentane (CyC5) vapor phase. The results showed that hydrate formation rate is higher in the vapor phase compared to the liquid CyC5 phase. The hydrate particle-particle adhesion forces slightly increase with temperature in the vapor phase, and the hydrate-droplet adhesion forces change with the conversion of water in liquid bridges. The adhesion strengths of hydrate deposition increase with substrate roughness and formation/annealing time, but decrease with temperature.
Article
Energy & Fuels
Wang Weiyang, Zhou Chenru, Liu Chenwei, Wang Zhiyuan, Li Mingzhong
Summary: This study experimentally investigated the interaction behaviors of hydrate particle-particle/droplet and hydrate deposition-pipe wall in the cyclopentane vapor phase. It found that hydrate formation in the vapor phase is a fast-growing process with rough particle surfaces exhibiting strong hydrophilic characteristics. The adhesion forces between hydrate particles in the vapor phase slightly increase with temperature and are approximately 2-3 times higher than in the liquid cyclopentane phase. In the case of hydrate deposition, the adhesion strengths increase with substrate roughness and formation/annealing time, but decrease with temperature.
Article
Chemistry, Multidisciplinary
Hannah M. Stoner, Anh Phan, Alberto Striolo, Carolyn A. Koh
Summary: Based on in situ measurements, it was found that the wettability of hydrate surfaces decreases with increasing annealing time, while the growth rate of hydrate films is not affected by annealing time or subcooling. This is attributed to the porosity of hydrate surfaces, which influences water spreading on the surface. The wettability generally decreases with increasing subcooling due to rougher surfaces, but this is balanced by higher growth rates at higher subcooling levels.
Article
Engineering, Marine
Qingchao Fang, Xin Zhao, Sunbo Li, Zhengsong Qiu, Zhiyuan Wang, Qi Geng
Summary: In this study, the effect of Tween and Span series surfactants with different HLB values on the cohesive force between cyclopentane hydrate particles was investigated. The results showed that the cohesive force decreased with decreasing HLB for both Tween and Span surfactants. The cohesive force increased with increasing concentration of Tween surfactants, while it decreased with increasing concentration of Span surfactants. The mechanism behind these effects was attributed to the aggregation of low-HLB surfactant molecules at the oil-water or gas-water interface, which increased the surface roughness and hydrophobicity of the hydrate particles, thus inhibiting the formation of liquid bridges between particles.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Liu Chenwei, Zhou Chenru, Li Mingzhong, Tong Shikun, Qi Minhui, Wang Zhiyuan
Summary: This study measured the interaction forces between methane hydrate particles at high pressure using a custom-built high-pressure micromechanical force device. It found that the cohesion forces between hydrate particles increase with contact time and decrease with annealing time and subcooling. The adhesion forces between hydrate particles and water droplets are much stronger and are influenced by subcooling and contact time. This study provides insights into the agglomeration mechanism of hydrates in gas pipelines and contributes to evaluating hydrate plugging risk.
Article
Chemistry, Physical
Laure Bar, Martin Eduardo Villanueva, Claudio Martin, Andrea Valencia Ramirez, Jonathan Goole, Frank Uwe Renner, Patricia Losada-Perez
Summary: Hybrid lipid bilayers composed of different types of molecules are suitable for studying biomembrane-related phenomena and can be produced in a controlled array fashion. The formation and stability of hybrid supported membranes are influenced by lipid phase, substrate surface energy, and topography. The lateral organization of hybrid membranes is weaker compared to standard supported lipid bilayers due to suboptimal organization of the underlying self-assembled monolayer. The self-assembled monolayer can undergo non-trivial reorganization in an aqueous environment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Environmental
Feng Wang, Senbo Xiao, Jing He, Fulong Ning, Rui Ma, Jianying He, Zhiliang Zhang
Summary: Onion inspired surface with low hydrate adhesion has been fabricated through mimicking the bio-properties of onion film. The surface, with abundant pores below smooth surface, decreases the hydrate adhesion strength significantly. Furthermore, the integration of a regenerable artificial cuticle layer enhances the performance of the surface, providing alternative solutions for future hydrate mitigation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Jyoti Shanker Pandey, Saad Khan, Adam Paul Karcz, Nicolas von Solms
Summary: A core-flooding setup was used to create artificial sedimentary CH4 hydrates under high-pressure and low-temperature conditions. The study found that the presence of additives enhances methane recovery and storage in hydrates.
Article
Chemistry, Multidisciplinary
Rui Ma, Feng Wang, Yuanhao Chang, Senbo Xiao, Niall J. English, Jianying He, Zhiliang Zhang
Summary: In this study, large-scale molecular simulations were used to investigate the adhesion of hydrates on solid surfaces, focusing on the atomistic structures of the intermediate layer and their impact on adhesion. The results revealed that the structure of the intermediate layer is a competitive equilibrium of induced growth from both sides, regulated by the content of guest molecules. By comparing the fracture behaviors of hydrate-solid surface systems with different intermediate structures, it was found that the adhesion strength is determined by the lattice areal density of water structure and the adsorption of guest molecules on the interface. Further analysis of adhesion strength distribution showed significant differences in adhesion among different water structures like ice and hydrate, with ice having approximately five times the adhesion strength compared to the lowest hydrate adhesion strength, consistent with experimental results.
Article
Chemistry, Multidisciplinary
Xinye Yu, Huizeng Li, Yanlin Song
Summary: Inkjet printing is an efficient method for distributing functional materials, with the quality depending on the wettability of the target surface. By modifying the surface wettability, different ink-drop impact dynamics and deposition morphologies can be achieved, enabling applications in advanced device fabrication and sensitive detection.
Article
Energy & Fuels
Yangchao Xia, Yaowen Xing, Xiahui Gui, Yijun Cao
Summary: In this study, the interactions between hydrocarbon oil and hydrophilic mineral surfaces were explored using CFM and MD simulations. Different functional groups were found to significantly influence the adhesion force between the oil collector and mineral surface, with polar hydrocarbon oils adhering strongly to the surface. The combination of MD and CFM provided a theoretical reference for mineral flotation separation.
Article
Energy & Fuels
Zhiyuan Wang, Pengfei Li, Shikun Tong, Jianbo Zhang, Chenru Zhou, Jihao Pei, Hemin Yang, Chenwei Liu
Summary: In this study, a high-pressure visualization microscopic force testing system was used to investigate the adhesion force between methane hydrate particles and wall droplets. The results showed that the adhesion force reached the lowest value at a QAs1 solution concentration of 0.2 wt% (CMC), with values of 589.81 mN/m and 1123.63 mN/m under 1 and 10 subcooling conditions, respectively. The mechanism of QAs1 in reducing adhesion force was found to be mainly through the reduction of gas-water interfacial tension under lower subcooling conditions and the steric hindrance effect of QAs1 molecules under higher subcooling conditions.
Article
Chemistry, Physical
Yanwen Lin, Tong Li, Senyun Liu, Qiao Shi, Ke Xu, Zhisen Zhang, Jianyang Wu
Summary: Understanding the interfacial mechanical properties between hydrate and solids is crucial for designing surfaces for hydrate management. This study examined the effects of surface wettability, solid substrate type, and temperature on the adhesion properties between THF hydrate and ice. The results showed that the adhesion strength of THF hydrate and ice varied with the composition of the coating, and the adhesion strength of ice was greater than that of THF hydrate for all investigated solid substrates. Additionally, the adhesion of THF hydrate on inorganic glass surfaces was found to be enhanced as a function of the receding contact angle. Molecular dynamics simulations revealed that the adhesion strength of ice on solid substrates was primarily influenced by the quasi-liquid water layer, while the adhesion of hydrate was also affected by newly formed unconventional clathrate cages. This study provides valuable insights for developing coatings to manage hydrates.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Energy & Fuels
Yu Wei, Qimeng Yang, Xuehua Zhang, Nobuo Maeda
Summary: This study investigated the shear strength of THF hydrate on substrates with different hydrophobicity and the impact of PVP. The results showed a decrease in critical shear stress with heating and an increase with the addition of PVP. Interestingly, the hydrates exhibited higher adhesive strength on hydrophobic substrates compared to hydrophilic ones.
Article
Energy & Fuels
Chun-Gang Xu, Min Wang, Gang Xu, Xiao-Sen Li, Wei Zhang, Jing Cai, Zhao-Yang Chen
Summary: Research demonstrates that CO2-CP binary hydrate and CO2 hydrate are formed successively and coexist in the final hydrate in the CP-CO2 system. The formation of these two hydrates causes two pressure drops.
Article
Energy & Fuels
Celina Kakitani, Daniela C. Marques, Adriana Teixeira, Leandro Valim, Moises A. Marcelino Neto, Amadeu K. Sum, Rigoberto E. M. Morales
Summary: This study focused on identifying parameters that influence hydrate formation in shut-in and restart conditions in offshore oil production. Results showed that shear rate and subcooling are key parameters, and the addition of anti-agglomerant reduces water-oil interfacial tension, promoting water/hydrate dispersion.
Article
Engineering, Chemical
Daniela C. Marques, Carlos L. Bassani, Celina Kakitani, Moises A. Marcelino Neto, Amadeu K. Sum, Rigoberto E. M. Morales
Summary: Measurements of gas hydrate deposition under sheared conditions are analyzed in this study. The experiments focus on methane hydrates and methane-ethane mixtures, examining wall deposition and gas consumption during hydrate formation, and providing mathematical insights.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Analytical
Kwanghee Jeong, Paul L. Stanwix, Eric F. May, Zachary M. Aman
Summary: Surfactants play critical roles in various technological applications, but there are limited methods available for quantitatively studying their adsorption at interfaces. In this study, we demonstrate a direct observation of surfactant adsorption using surface-enhanced Raman scattering (SERS). The results are compared with conventional interfacial tension measurements and thermodynamic theory, providing a research platform to explore structure-function relationships and design new surfactant species.
ANALYTICAL CHEMISTRY
(2022)
Article
Energy & Fuels
Wonjung Choi, Junghoon Mok, Jonghyuk Lee, Yohan Lee, Jaehyoung Lee, Amadeu K. Sum, Yongwon Seo
Summary: In this study, the guest exchange behaviors in hydrate-bearing sediment during depressurization-assisted replacement were experimentally investigated. The results showed that the replacement efficiency and CH4 production rate were significantly enhanced through depressurization-assisted replacement. Additionally, a larger amount of CO2 could be stored in the hydrate-bearing sediment.
Article
Engineering, Environmental
Vincent W. S. Lim, Mark T. J. Barwood, Peter J. Metaxas, Michael L. Johns, Zachary M. Aman, Eric F. May
Summary: Nucleation rates of carbon dioxide hydrate were measured and found to be higher than those of methane or structure II hydrates under the same conditions. The mononuclear mechanism was found to accurately describe the formation probability of CO2 hydrates.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wade Millar, Zachary M. Aman, Rob Atkin, Hua Li
Summary: In this study, electrically conductive lubricating greases were produced using two ionic liquids and solid lubricants. The results show that these greases have higher electrical conductivity and improved lubricity compared to conventional mineral oil based greases. Among the tested base liquids, [EMIm][TFMS] performs the best in terms of friction coefficient, wear resistance, as well as electrical and thermal conductivities.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Multidisciplinary Sciences
Yong Chen, Satoshi Takeya, Amadeu K. Sum
Summary: Clathrate hydrates are ordered structures stabilized by hydrophobic interactions between water and guest molecules. In this study, an alternative method is proposed to understand the complex structures of clathrate hydrates, revealing the diverse crystalline hydrogen-bonded networks that can be formed. The topological dual relations between clathrate hydrate networks and tetrahedrally close-packed structures provide insights into their nucleation, phase transition, and co-existence mechanisms. Molecular dynamics simulations are employed to explore the intrinsic structural relationships of clathrate hydrates and other unrelated ordered materials.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Mohd Zaki Z. Abidin, Zachary M. Aman, Eric F. May, Michael L. Johns, Xia Lou
Summary: This study investigates the synergistic effect of combining under-inhibited monoethylene glycol (MEG) with synthetic surfactants (AA) on hydrate dispersion stability. It is found that under-inhibited MEG may lead to hydrate agglomeration due to unconverted water, while AA improves the stability of hydrate dispersion. Differential scanning calorimeter is used to measure hydrate dispersion stability, showing gradual reduction in integrated area of hydrate dissociation curves during repeated cycles. Surfactants, whether natural or synthetic, can prevent water droplets from coalescing and hydrate particles from aggregating.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Yohan Lee, Taras Y. Makogon, Amadeu K. Sum
Summary: In this study, the deposition kinetics and morphology of methane hydrates were investigated at 10 MPa. It was found that non-volatile thermodynamic hydrate inhibitors (THIs) were ineffective in preventing hydrate formation near the wellhead, while volatile THIs could prevent hydrate deposition even under cold conditions. However, volatile THIs only delayed the growth of hydrate deposits in warm wellheads. The study provides insight into better management strategies for THI usage to mitigate hydrate blockage risk near the wellhead.
Article
Chemistry, Multidisciplinary
Jianan Wang, Joshua J. Buzolic, Jesse W. Mullen, Paul A. Fitzgerald, Zachary M. Aman, Maria Forsyth, Hua Li, Debbie S. Silvester, Gregory G. Warr, Rob Atkin
Summary: Mixing ionic liquids with nonsolvating fluorous diluents can reduce viscosity while retaining or enhancing key physical properties, and does not significantly affect the electrochemical performance on gold and carbon electrodes.
Article
Energy & Fuels
Shunsuke Sakurai, Zachary M. Aman, Tomoya Nonoue, Takuya Nagaoka, Motohiro Omori, Joel Choi, Eric F. May, Bruce W. E. Norris
Summary: This study examines the flow assurance risk of hydrate re-formation in gas hydrate production and proposes the use of low-heat transfer coefficient flexible hoses to control the risk. The research focuses on a field test conducted in Japan and provides simulations and data comparison to support the findings. The insights gained from this study will inform the design of future methane hydrate production facilities.
Article
Energy & Fuels
Ana C. G. A. Rebello, Gustavo A. B. Sandoval, Monica F. Naccache, Paulo R. de Souza Mendes, Amadeu K. Sum, Adriana Teixeira, Leandro Valim
Summary: This research investigates the formation of ethane gas hydrates in water-in-model oil emulsions. The results show that increasing the subcooling, water cut, and shear rate can reduce the induction period of the hydrates. The amount of water converted to hydrate can be estimated by analyzing the viscosity and pressure curves.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Nasir Khan, Asheesh Kumar, Michael L. Johns, Eric F. May, Zachary M. Aman
Summary: In this study, the hydrate anti-agglomerating characteristics of 2-butoxyethanol (BGE) were investigated. The results showed that BGE could reduce the oil-water interfacial tension, enhance the kinetics of methane hydrate formation, and prevent agglomeration. This study provides new insights into the development of new anti-agglomerant chemistries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
David J. Zhu, Bruce W. E. Norris, Zachary M. Aman, Eric F. May
Summary: Understanding gas hydrates is crucial for a wide range of industrial applications. Existing models for predicting hydrate equilibrium boundaries are over-parameterized and lack a strong physical basis. In this study, a new model is presented with fewer parameters but equivalent accuracy. The model provides insight into the physical chemistry governing hydrate thermodynamics by focusing on specific interactions within each hydrate cavity. With improved parameters, the model offers more robust predictions for industrially-important, multi-component mixtures containing thermodynamic inhibitors.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Energy & Fuels
Kwanghee Jeong, Bruce W. E. Norris, Eric F. May, Zachary M. Aman
Summary: Hydrate risk management is crucial for the energy industry, especially under low temperature and high-pressure conditions. The rate of water injection in a wet gas system was found to significantly affect the severity of hydrate plugging, which cannot be accurately predicted by existing software tools. Incorporating the atomization of liquids over an expansion valve is essential for improving the accuracy of predicting hydrate plug formation severity.
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)