Article
Chemistry, Physical
Kenneth D. Judd, Nicole M. Gonzalez, Tinglu Yang, Paul S. Cremer
Summary: In this study, vibrational sum frequency spectroscopy (VSFS) and pressure-area Langmuir trough measurements were used to investigate the binding of alkali metal cations to eicosyl sulfate (ESO4) surfactants at the air/water interface. The results showed that K+ had a stronger binding affinity to the fatty sulfate interface compared to Li+ and Na+, and all three cations formed ion pairs under certain conditions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Biswajit Biswas, Prashant Chandra Singh
Summary: Propofol, as the most common drug for general anesthesia, has been studied in terms of its structure and dissociation at the water interface under different pH conditions. The results show that propofol remains neutral and forms hydrogen bonds with water molecules at lower pH, while it becomes deprotonated and enhances the OH stretch of water at higher pH. The pK(a) of propofol at the water interface is lower than in bulk medium, indicating enhanced dissociation. These findings suggest that propofol prefers to be in the charged state at the water interface under physiological conditions, impacting its diffusion and acid-base equilibrium in the interfacial arterial blood region.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Xiaoqing Yu, Kuo-Yang Chiang, Chun-Chieh Yu, Mischa Bonn, Yuki Nagata
Summary: Insights into the microscopic structure of aqueous interfaces are important for understanding various processes on the water surface. The researchers used HD-SFG spectroscopy to probe these interfaces and showed the importance of correcting the measured spectra for local electromagnetic field effects. They compared different models to obtain an accurate representation of the interfacial water response and found that the Lorentz model provides a straightforward method for obtaining the molecular response in the hydrogen-bonded region.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Review
Biochemistry & Molecular Biology
Nan Liu, Hong-Wei Wang
Summary: Cryogenic electron microscopy (cryo-EM) is a powerful and widely used method for determining high-resolution structures of macromolecules. The main challenge lies in preparing high-quality vitrified specimens, which face various practical difficulties. This review discusses the problems caused by the air-water interface (AWI) and proposes strategies to overcome them, including the use of additives, fast vitrification devices, and thin layer supporting films. These approaches have been proven successful in cryo-EM specimen preparation.
JOURNAL OF MOLECULAR BIOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ryoji Kusaka, Satoshi Nihonyanagi, Tahei Tahara
Summary: The study directly observed a photochemical reaction occurring at the air-water interface using ultrafast phase-sensitive interface-selective nonlinear vibrational spectroscopy. The results showed that the reaction rate at the water surface is 10^4 times faster than in the bulk aqueous phase, indicating significant differences in photochemical reactions between water interfaces and bulk water.
Article
Chemistry, Physical
Subhadip Roy, Jahur Alam Mondal
Summary: Research shows that ions have a strong correlation with the structure of hydrogen bonding at the air/water interface and in bulk water. Specifically, structure-breaking anions decrease hydrogen bonding at the interface, while structure-making anions have the opposite effect. None of the electrolytes studied significantly affect the orientation of water molecules at the interface.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Alexandre Poirier, Antonio Stocco, Romain Kapel, Martin In, Laurence Ramos, Amelie Banc
Summary: The study investigated the adsorption process of sunflower protein extract at two air-water and oil-water interfaces, revealing a three-step mechanism. Initially, a diffusion-limited adsorption of proteins at interfaces occurs, followed by the formation of a three-dimensional saturated monolayer of proteins, and finally a thick layer expanding in the aqueous phase. The study also found that the adsorption mechanisms of proteins exhibit significant divergences at longer adsorption times.
Article
Polymer Science
Raviteja Kurapati, Upendra Natarajan
Summary: Atomistic MD simulations were used to investigate the structure and hydration properties of isotactic Poly (methacrylic acid) (i-PMA) at the CCl4-H2O interface at different concentrations. The study revealed the occurrence of three concentration regimes (dilute, semi-dilute, and concentrated) at the molecular level for the first time in polymer systems at an oil-water interface. The conformation of i-PMA chains changed from planar to random coil structure with increasing interface concentration, marked by variations in the components of Rg and a decrease in the preferential orientation of the side groups. The study provided new molecular insights into the conformational changes and interactions among different chemical groups with varying interface concentration of the polymer.
Article
Optics
Alexander Michailov, Alexey Povolotskiy, Vladimir Kuzmin
Summary: The study focuses on the absorbance of optical radiation reflection from the boundary of two soft-matter media with a thin monolayer between, analyzing reflectance and absorbance spectra invariant with respect to incidence angles. For s-polarized radiation, the angular dependence of absorbance was found to offer no additional information compared to a single-angle study, a conclusion supported by multi-angle infrared reflection-absorption spectroscopy measurements at the air-water interface with a thin lipid film.
Article
Polymer Science
Alena Vdovchenko, Amanda K. Pearce, Mark Freeley, Rachel K. O'Reilly, Marina Resmini
Summary: This study investigates the impact of different polymerization methods on the characteristics and applications of pNIPAm nanogels, revealing significant differences between heterogeneous and homogeneous polymerization in terms of internal structure and thermoresponsive behavior.
Article
Engineering, Environmental
Wenzhang Tian, Jun Yang, Wen-Qing Xu, Lin Lian, Xia-Wen Qiu, Xiao Liang, Chen-Chou Wu, Xiangjun Gong, Guangzhao Zhang, Lian-Jun Bao, Eddy Y. Zeng
Summary: Quantifying chemical transfer across the air-water interface is crucial for understanding global geochemical processes. This study presents a fluorescence optical system that visualizes the formation of the air-water microlayer and quantifies the diffusion flux using pyrene. The results show that the air-water microlayer consists of a surface microlayer in water and a diffusion layer in air.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Economics
Benoit Le Maux, Sarah Necker
Summary: We conducted a ten-round online mind game to investigate the impact of timing and content on the effectiveness of honesty nudges. Reminding individuals of the right thing to do increases honesty, while including information about assessing dishonesty strengthens the intervention's effect. Both interventions are equally effective before any decision is made or after individuals have played five rounds of the game. However, personalizing nudges based on an individual's previous responses does not enhance honesty. Additionally, the effect of different nudge content is primarily driven by previously dishonest individuals.
JOURNAL OF ECONOMIC BEHAVIOR & ORGANIZATION
(2023)
Article
Chemistry, Physical
Naoki Numadate, Shota Saito, Yuki Nojima, Taka-aki Ishibashi, Shinichi Enami, Tetsuya Hama
Summary: Ultraviolet photolysis of fatty acid surfactants can generate hydroxyl radicals, but the dimerization structure of nonanoic acid's surface inhibits its photochemical reactivity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Engineering, Environmental
Kejian Li, Wenbo You, Wei Wang, Kedong Gong, Yangyang Liu, Longqian Wang, Qiuyue Ge, Xuejun Ruan, Jianpeng Ao, Minbiao Ji, Liwu Zhang
Summary: This study demonstrates that the photodecomposition of perfluorooctanoic acid (PFOA) can be significantly accelerated by carrying out the process in microdroplets. The abundance of the air-water interface in microdroplets promotes the decomposition of PFOA, resulting in higher removal rates. The method shows high performance and universality in actual water matrices.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Merin Jose, Muraleedharapai Mayarani, Madivala G. Basavaraj, Dillip K. Satapathy
Summary: Experimental studies have shown that binary mixtures of soft colloids in monolayer deposits exhibit good ordering properties, regardless of the size difference or mixing ratio of the particles. The unique characteristics of soft colloids allow them to deform at the interface to preserve the crystalline lattice structure.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Aimi A. H. Tajuddin, Mitsuru Wakisaka, Tatsuhiko Ohto, Yue Yu, Haruki Fukushima, Hisanori Tanimoto, Xiaoguang Li, Yoshitatsu Misu, Samuel Jeong, Jun-ichi Fujita, Hirokazu Tada, Takeshi Fujita, Masaki Takeguchi, Kaori Takano, Koji Matsuoka, Yasushi Sato, Yoshikazu Ito
Summary: To achieve a sustainable hydrogen economy, corrosion-resistant non-noble-metal catalysts are necessary. This study investigates the self-selection/reconstruction characteristics of multi-element alloys and their performance in the oxygen evolution reaction, demonstrating high corrosion resistance and catalytic activity.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Johannes Hunger, Jan Schaefer, Patrick Ober, Takakazu Seki, Yongkang Wang, Leon Praedel, Yuki Nagata, Mischa Bonn, Douwe Jan Bonthuis, Ellen H. G. Backus
Summary: Understanding the collective behavior of ions at charged surfaces is crucial for geological and electrochemical processes. In this study, sum-frequency generation (SFG) spectroscopy was used to investigate the symmetry-breaking of water molecules at a charged silica surface in contact with different alkaline metal chloride solutions. The results demonstrate that the water response varies with the cation, with LiCl showing a significantly enhanced SFG response compared to CsCl. Further analysis indicates that the effect of different salts on the optical response is indirectly mediated by the reorganization of interfacial water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yongkang Wang, Takakazu Seki, Xuan Liu, Xiaoqing Yu, Chun-Chieh Yu, Katrin F. Domke, Johannes Hunger, Marc T. M. Koper, Yunfei Chen, Yuki Nagata, Mischa Bonn
Summary: We used HD-SFG spectroscopy to directly probe the interfacial water at the graphene electrode supported on CaF2. The observed phase transition-like variations in the HD-SFG spectra were not due to the charging/discharging of graphene, but rather the CaF2 substrate through pseudocapacitive process. The potential-dependent spectra were similar to the pH-dependent spectra, indicating that the pseudocapacitive behavior was associated with a local pH change induced by water dissociation between CaF2 and graphene.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xiaoqing Yu, Kuo-Yang Chiang, Chun-Chieh Yu, Mischa Bonn, Yuki Nagata
Summary: Insights into the microscopic structure of aqueous interfaces are important for understanding various processes on the water surface. The researchers used HD-SFG spectroscopy to probe these interfaces and showed the importance of correcting the measured spectra for local electromagnetic field effects. They compared different models to obtain an accurate representation of the interfacial water response and found that the Lorentz model provides a straightforward method for obtaining the molecular response in the hydrogen-bonded region.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Kazuki Inoue, Yair Litman, David M. Wilkins, Yuki Nagata, Masanari Okuno
Summary: The impact of vibrational coupling on water spectra is studied using hyper-Raman (HR) spectroscopy and machine learning. Isotopic dilution reduces the HR bandwidth, but the coupling effect is smaller compared to IR and Raman spectra. Machine learning HR spectra reveal that intermolecular coupling plays a major role in broadening the bandwidth, while intramolecular coupling has negligible impact, consistent with IR and Raman spectra. This study demonstrates the limited effect of intramolecular vibrations, independent of selection rules in vibrational spectroscopy.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Takakazu Seki, Chun-Chieh Yu, Kuo-Yang Chiang, Alessandro Greco, Xiaoqing Yu, Fumiki Matsumura, Mischa Bonn, Yuki Nagata
Summary: In typical aqueous systems, multiple ion species are co-solvated, and these ions at the water-air interface can have significant impacts on chemical reactivity, aerosol formation, climate, and water odor. Through sum-frequency generation spectroscopy, researchers have quantified the relative surface activity of two co-solvated ions and found that hydrophobic ions tend to be speciated to the water interface due to the presence of hydrophilic ions. The speciation of ions at electrolyte solution interfaces is determined by the solvation energy difference between the ions and the intrinsic surface propensity of ions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Xiushang Xu, Satoshi Takebayashi, Hiroki Hanayama, Serhii Vasylevskyi, Takatsugu Onishi, Hirokazu Tada, Tatsuhiko Ohto, Akimitsu Narita
Summary: We present the in situ generation and characterization of a BIA derivative as a high diradical open-shell biaryl. The ground state of BIA diradical was determined to be a singlet state with a nearly degenerate triplet state through theoretical calculations and variable-temperature EPR analyses. These findings offer new insights into the design of open-shell biaryls.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Pankaj Seliya, Mischa Bonn, Maksim Grechko
Summary: This study focuses on the interaction between quantum-mechanical systems and fluctuating thermal environments, providing insights into their coupling through a combined experimental and theoretical approach. The experimental part involves spectroscopy measurements to directly observe the coupling between quantum oscillators and low-frequency modes. The theoretical part introduces a mixed quantum-classical formalism to describe the sample response. This approach enables the quantitative and mode-specific analysis of coupled quantum and classical dynamics in complex chemical systems.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Gyu Don Kong, Jiung Jang, Suin Choi, Gayoung Lim, In Soo Kim, Tatsuhiko Ohto, Seiya Maeda, Hirokazu Tada, Hyo Jae Yoon
Summary: Control over packing structure of monolayer enables the conversion of inert molecules into rectifiers.
Article
Chemistry, Multidisciplinary
Samuel Jeong, Tatsuhiko Ohto, Tomohiko Nishiuchi, Yuki Nagata, Jun-ichi Fujita, Yoshikazu Ito
Summary: To realize advanced fuel-cell technology, proton exchange membranes with high proton conductivity and low crossover of fuel molecules are required. In this study, a simple yet powerful method is proposed to optimize the crossover-conductivity relationship by using sulfanilic-functionalized holey graphenes supported by a Nafion membrane. The results show significant reduction in crossover and proton conductivity, indicating potential for application in advanced fuel cells that use methanol and formic acid as chemical fuels.
Article
Chemistry, Physical
Hungu Kang, Jiung Jang, Gyu Don Kong, Sangmin Jung, Tatsuhiko Ohto, Hyo Jae Yoon
Summary: N-heterocyclic carbene (NHC) serves as an emerging anchor moiety for surface engineering and various applications. The charge transport properties of NHC adsorbates are affected by different deposition conditions. By depositing a NHC salt precursor based on benzo[d]imidazole onto an ultrasmooth gold substrate using ambient incubation, base-induced deprotonation, and electrochemical deprotonation, it was found that different conditions led to variations in surface coverage, resulting in opposite trends in electrical conductance and thermopower.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Xiushang Xu, Satoshi Takebayashi, Hiroki Hanayama, Serhii Vasylevskyi, Takatsugu Onishi, Tatsuhiko Ohto, Hirokazu Tada, Akimitsu Narita
Summary: We present the synthesis of a 6,6'-biindeno[1,2-b]anthracene (BIA) derivative as a high diradical open-shell biaryl, characterized by various spectroscopic techniques. Theoretical calculations and EPR analyses reveal its singlet ground state with a nearly degenerate triplet state, shedding light on the design of unique open-shell biaryls.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Shatabda Bhattacharya, Tatsuhiko Ohto, Hirokazu Tada, Shyamal K. Saha
Summary: This study explores the evolution of magnetism in low-dimensional diamagnetic systems like MoS2 by encapsulating Ni nanophases in MoS2. It is found that the hybrid nanostructure exhibits a negative magnetization state and giant exchange bias, with reversible temperature-induced changes in spin magnetic moment and coercivity. The results suggest the possibility of robust thermomagnetic memory.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Yongkang Wang, Yuki Nagata, Mischa Bonn
Summary: Graphene, as a transparent two-dimensional conductive electrode, has brought new perspectives to electrochemical systems. The substrate plays a crucial role in determining the water organization and wetting behavior of graphene. Surface-specific spectroscopy study reveals that the charging of graphene is decoupled from the charging of its substrate.
FARADAY DISCUSSIONS
(2023)
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)
