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
Physics, Applied
Jin Shimada, Atsushi Tani, Takeshi Yamada, Takeshi Sugahara, Takayuki Hirai, Takuo Okuchi
Summary: The dynamics of water molecules in tetra-n-butyl-d36-ammonium bromide semiclathrate hydrate were studied, revealing a fast reorientation motion of water molecules in the temperature range of 212-278 K. The mean jump distance of hydrogen atoms was found to be within 1.5-2.0A degrees, with a relaxation time of 100-410 ps and an activation energy of 10.2 +/- 5.8 kJ/mol. This short relaxation time is possibly due to the strong interaction between a bromide anion and its surrounding water molecules, suggesting a unique strategy for designing efficient, safe, and inexpensive proton conductors using semiclathrate hydrates.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
M. Balordi, F. Pini, G. Santucci de Magistris
Summary: This study introduces a simple and scalable method to achieve superhydrophobic and ice-phobic effects on steel surfaces through short hydrothermal treatment, with potential applications in industrial settings requiring high levels of protection.
SURFACES AND INTERFACES
(2022)
Review
Engineering, Chemical
Nkululeko Nkosi, Diakanua Nkazi, Kaniki Tumba
Summary: This article reviews the emerging and innovative gas hydrate-based fruit juice concentration technology, highlighting its advantages of preserving bioactive compounds and conserving energy. Carbon dioxide is found to be the preferred hydrate former for juice concentration. However, further research is needed to confirm the sustainability of this novel process.
JOURNAL OF FOOD ENGINEERING
(2023)
Article
Energy & Fuels
Guilherme Muhlstedt, Jonathan Felipe Galdino, Diogo E. Andrade, Cezar O. R. Negrao
Summary: Gas hydrates may form in deep-water drilling operations when light compounds flow into the wellbore due to a kick. By inducing hydrate formation with tetrahydrofuran in water-based drilling fluid, researchers found that the resulting hydrate slurry is a time-dependent elastoviscoplastic material with irreversible microstructural changes under shear. The study also revealed that the hydrate slurry exhibits different rheological properties depending on whether it is formed statically or dynamically.
Article
Materials Science, Multidisciplinary
Kamran Alasvand Zarasvand, David Orchard, Catherine Clark, Kevin Golovin
Summary: The study investigates the ice adhesion strength of Buckling Elastomer-like Anti-icing Metallic Surfaces (BEAMS) on curved surfaces. Increasing the radius of curvature was found to increase the ice adhesion strength for both glaze- and rime-type ice. The compliance of the material used to suspend the metallic sheet also affected the adhesion strength of rime ice. The study highlights the potential of BEAMS as a durable, low-ice-adhesion material for complex and curved surface geometries.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Muhammad Imran Jamil, Tao Qian, Waqar Ahmed, Xiaoli Zhan, Fengqiu Chen, Dangguo Cheng, Qinghua Zhang
Summary: In this work, a self-replenishing nonfluorinated durable hydrate-phobic coating of candle soot particles is presented to reduce hydrate adhesion and solve the blockage problem in oil and gas transportation. The coating promotes a thick barrier film of hydrocarbons to prevent water bridges between hydrate and the coated substrate, and exhibits long-term slippery, durable, low cost, anticorrosion, and self-cleaning properties.
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
Engineering, Environmental
Jie Xu, Qinglin Chen, Jianwei Du
Summary: Inducing pure methane hydrate from double methane semi-clathrate hydrate is a promising method to enhance methane storage efficiency. This study used a halogen-free semi-clathrate hydrate former to conduct comprehensive experiments, showing significant improvements in methane uptake.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Byeonggwan Lee, Kyuchul Shin, Sanehiro Muromachi, Igor L. Moudrakovski, Christopher I. Ratcliffe, John A. Ripmeester
Summary: Antifreezes such as methanol and ammonia can enhance methane storage in binary clathrate hydrates like THF and TBAB. Methanol acts as a catalyst for methane hydrate formation and induces TBAB hydrates to form an orthorhombic structure suitable for methane storage. These findings suggest that methanol could play a crucial role in hydrate-based methane storage systems.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Parul Sahu
Summary: Clathrate hydrates are gaining attention for their applications in water reclamation, with advancements in forming agents and kinetic promoters playing a key role in accelerating the hydrate formation and water recovery process. Additionally, developments in novel reactor designs, efficient separation methods, and hybrid processes are making clathrate hydrate technology a strong candidate for future water reclamation from waste effluents.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Shengli Liu, Wenxiu Zhang, Huanhua Wu, Jiaheng Wang, Yongqi Yuan, Sikai Wang, Jinxiang Liu
Summary: Clathrate hydrate is a promising candidate for hydrogen storage, and the addition of natural gas can reduce the formation pressure and improve energy density. Through calculations and simulations, we estimated the hydrogen storage capacity of H2-CH4 binary hydrate and studied its thermodynamical and mechanical stability. The binary hydrate can maintain its structure under moderate temperature and pressure, and exhibits a self-preservation effect at -270 K, making it suitable for hydrogen storage and transport. These findings enhance our understanding of mixed hydrate as a viable hydrogen storage technology for achieving a sustainable hydrogen economy.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Takuma Misawa, Tomoaki Ishikawa, Satoshi Takeya, Saman Alavi, Ryo Ohmura
Summary: CO2 separation from H2 + CO2 gas mixture is essential for stable supply of blue hydrogen, and hydrate-based CO2 separation is a superior technology in terms of environmental and economic aspects. The study showed successful CO2 separation in the H2 + CO2 + CP + H2O system at 284 K, but with an increase in energy costs due to hydrogen loss.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Review
Energy & Fuels
Saeid Sinehbaghizadeh, Agus Saptoro, Sepideh Amjad-Iranagh, Parisa Naeiji, Angnes Ngieng Tze Tiong, Amir H. Mohammadi
Summary: Clathrate hydrates, or gas hydrates, have gained global attention for their potential use in sustainable technologies. Understanding the phenomena associated with gas hydrates is crucial for their industrial applications and the development of green technologies. Molecular dynamics simulations have been widely used to analyze the physical movements of molecules and the evolution of atomic positions in gas hydrates.
Article
Chemistry, Physical
Satoshi Takeya, Akihiro Hachikubo, Hirotoshi Sakagami, Hirotsugu Minami, Satoshi Yamashita, Masayoshi Takahashi, Keiichi Hirano, Kazuyuki Hyodo, Akio Yoneyama
Summary: Understanding the dissolution processes of natural methane (CH4) hydrates is crucial for assessing the amount of methane released into seawater from unconventional natural gas resources. High-resolution experiments have successfully visualized the spatial relationships between methane hydrates and seawater, revealing that dissociation of methane hydrates leads to the formation of microbubbles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Mechanics
Sami Yamani, Gareth H. McKinley
Summary: The FENE-P dumbbell constitutive equation is commonly used for simulating viscoelastic shear flows and predicting macroscopic properties of dilute polymer solutions. By evaluating steady material functions, universal master curves for these functions, as well as the corresponding stress ratio, can be constructed, which helps in understanding the effects of finite extensibility of polymer chains.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2023)
Article
Mechanics
Joshua David John Rathinaraj, Gareth H. McKinley
Summary: Oscillatory rheometric techniques are widely used to characterize the viscoelastic properties of complex fluids. However, conventional Fourier transforms for analyzing oscillatory data are limited in studying shear-induced microstructural changes in time-evolving materials. In this study, the Gabor transform is explored as a more advanced signal processing technique to extract time-resolved frequency information from oscillatory data. The Gabor transform enables accurate measurement of rapid changes in storage and loss modulus, extraction of characteristic thixotropic/aging time scale, and extraction of useful viscoelastic data from initial transient response. The resulting test protocol, Gaborheometry, reduces the number of required experiments and data postprocessing time significantly.
JOURNAL OF RHEOLOGY
(2023)
Article
Mechanics
Esteban F. Medina-Banuelos, Benjamin M. Marin-Santibanez, Emad Chaparian, Crystal E. Owens, Gareth H. McKinley, Jose Perez-Gonzalez
Summary: It has been discovered that the steady fractal vane-in-cup (fVIC) flow of complex fluids using vanes with fractal cross sections can produce an almost axisymmetric flow field and rotation rate-independent effective radius, making it a reliable measurement tool for complex fluids. However, axial shearing/compression during the insertion of the rheometric tool in the sample also accelerates syneresis, leading to shear banding for Couette and fVIC flows.
JOURNAL OF RHEOLOGY
(2023)
Article
Polymer Science
Gauthier Legrand, Sebastien Manneville, Gareth H. McKinley, Thibaut Divoux
Summary: Nanocomposite gels formed by mixing hydrophobic colloidal soot particles and a sodium salt of carboxymethylcellulose (CMC), known as cellulose gum, exhibit different mechanical behaviors depending on the relative content of the two components. At low CMC concentration, the gel shows electric conductivity and glassy-like viscoelastic behavior, while at higher CMC concentration, the gel becomes nonconductive and displays power-law viscoelastic behavior. The CMC plays a crucial role in the gel's viscoelastic properties. These findings provide valuable insights for designing nanocomposite gels based on hydrophobic interactions.
Article
Physics, Multidisciplinary
Minaspi Bantawa, Bavand Keshavarz, Michela Geri, Mehdi Bouzid, Thibaut Divoux, Gareth H. McKinley, Emanuela Del Gado
Summary: Soft particulate gels consist of a small amount of particulate matter dispersed in a continuous fluid phase. The mechanical response and gel elasticity are determined by the particle volume fraction. However, the diverse range of functional dependencies reported experimentally has made it difficult to identify general scaling laws.
Article
Mechanics
Jelle J. J. Schoppink, Keerthana Mohan, Miguel A. A. Quetzeri-Santiago, Gareth McKinley, David Fernandez Rivas, Andrew K. K. Dickerson
Summary: By selectively coating hydrophobic strips on hydrophilic glass capillaries, the trajectory and characteristics of the microjet can be influenced and controlled.
Article
Materials Science, Biomaterials
Mario Milazzo, Vincent Fitzpatrick, Crystal E. Owens, Igor M. Carraretto, Gareth H. McKinley, David L. Kaplan, Markus J. Buehler
Summary: This study investigates the rheology, printability, and prosthetic mechanical properties of HA and HA-silk protein composites, highlighting the roles of composition and water content. The inclusion of silk improves the quality of printed items by reducing underextrusion and slumping. A printing map is constructed to guide the manufacturing of HA-based inks for biomedical applications requiring sub-millimetric features.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Physics, Fluids & Plasmas
Sami Yamani, Yashasvi Raj, Tamer A. Zaki, Gareth H. McKinley, Irmgard Bischofberger
Summary: The interplay between viscoelasticity and inertia in dilute polymer solutions can lead to inertioelastic instabilities, resulting in elastoinertial turbulence (EIT) with distinct spatiotemporal features compared to Newtonian turbulence. Our study on a submerged planar jet of a dilute polymer solution in a quiescent water tank reveals that fluid elasticity has a nonmonotonic effect on the jet stability, creating two different regimes. At low levels of elasticity, an inertioelastic shear-layer instability emerges, destabilizing the flow and causing a turbulence transition closer to the nozzle. Increasing fluid elasticity merges the shear-layer instability into a bulk instability, partially stabilizing the flow and retarding the transition to turbulence. The fully turbulent state exhibits unique spatiotemporal features associated with EIT, characterized by self-similar evolution of jet spreading angle, entrainment, and coherent structures elongated in the streamwise direction. LDV measurements show a frequency spectrum with a -3 power-law exponent, different from Newtonian turbulence's well-known -5/3 exponent.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Nanoscience & Nanotechnology
Jake Song, Sungjin Kim, Olivia Saouaf, Crystal Owens, Gareth H. McKinley, Niels Holten-Andersen
Summary: This study presents a novel design strategy for the synthesis of high-concentration soft magnetic hydrogels by in situ mineralization of iron oxide nanoparticles within polymer hydrogels. The resulting hydrogels exhibit softness, viscoelasticity, and strong magnetic actuation, making them suitable for biomedical applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Mechanics
Simon J. Haward, Stylianos Varchanis, Gareth H. McKinley, Manuel A. Alves, Amy Q. Shen
Summary: Part I presents a microfluidic device for generating near-homogeneous uniaxial and biaxial elongational flows. In Part II, this device is used to examine the extensional rheology of dilute polymer solutions compared to measurements made under planar extension. The extension rate and tensile stress difference generated in the fluid are measured using micro-particle image velocimetry and excess pressure drop measurements. The results show that at higher polymer concentrations, the experimental measurements deviate from the model predictions due to intermolecular interactions as the polymer chains unravel in the extensional flows.
JOURNAL OF RHEOLOGY
(2023)
Article
Mechanics
San To Chan, Simon J. Haward, Eliot Fried, Gareth H. Mckinley
Summary: Saltwater taffy exhibits critical gel-like behavior and obeys time-temperature superposition principle. Its rheological properties can be described by the fractional Maxwell gel model. Minor ingredients like flavorings and colorings have little impact on the rheology of taffy.
Article
Multidisciplinary Sciences
Kyle R. Lennon, Gareth H. McKinley, James W. Swan
Summary: The development of data-driven models for complex fluid mechanics is essential for designing soft materials. This study presents a framework that allows rheologists to construct learnable models incorporating important physical information, without being dependent on specific experimental protocols or flow kinematics. These models enable rapid discovery of accurate constitutive equations from limited data and can describe more complex flows. The flexibility of this framework enables its application to a wide range of material systems and engineering problems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Rishabh V. More, Reid Patterson, Eugene Pashkovski, Gareth H. McKinley
Summary: By studying the rod-climbing effect, we can measure the elasticity of complex fluids, including factors such as rotation rate, fluid elasticity, surface tension, and inertia. Our results show that by combining small amplitude oscillatory shear flow measurements and commercial rheometer measurements, we can accurately measure the normal stress differences of complex fluids.
Article
Chemistry, Physical
Joshua David John Rathinaraj, Kyle R. Lennon, Miguel Gonzalez, Ashok Santra, James W. Swan, Gareth H. McKinley
Summary: Clay slurries are widely used in the oil exploration industry as drilling fluids. However, modeling the rheological behavior of these suspensions is challenging due to their thermal-driven evolution and non-linear viscoelastic properties. This study presents a new approach for modeling the linear viscoelastic response of aging bentonite suspensions, which effectively solves the problem by transforming the time domain and material domain. Experimental measurements support the validity of this model.
Review
Chemistry, Physical
Jake Song, Niels Holten-Andersen, Gareth H. Mckinley
Summary: This study introduces the non-Maxwellian linear stress relaxation observed in soft matter systems and discusses its physical origins. Suitable mathematical models are proposed to describe this phenomenon. The research is important for understanding and modeling the mechanical relaxation of soft materials.
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)