Article
Biochemistry & Molecular Biology
Monica S. Schoenenberger, Willi Halfter, Alexia Ferrand, Kathrin Halfter, Alexandar Tzankov, Hendrik P. N. Scholl, Paul Bernhard Henrich, Christophe A. Monnier
Summary: This article examines the compositional and biophysical properties of human basement membranes, revealing them to be stiff yet highly elastic materials. The role of composition, mechanics, and hydration in determining the properties of basement membranes is highlighted.
Article
Biochemistry & Molecular Biology
Bingen G. Monasterio, Noemi Jimenez-Rojo, Aritz B. Garcia-Arribas, Howard Riezman, Felix M. Goni, Alicia Alonso
Summary: The study demonstrated that cells grown under sphingolipid-restricted conditions have a certain level of survival ability. Enriching with sphingomyelin can restore cell growth rates, and the restriction has significant effects on membrane properties and composition in both plasma membrane and whole cell lipids. Force measurements and mass-spectroscopic analysis revealed that restricting sphingolipid supply can significantly impact the membrane characteristics and composition.
Article
Chemistry, Multidisciplinary
Ana Carolina Vilchez, Ana Laura Villasuso, Natalia Wilke
Summary: Glycerolipid remodeling in barley roots under cold stress affects the biophysical properties of cell membranes, leading to changes in water molecule order and lipid unsaturation index. The reorganization of membrane films at different temperatures suggests a role of membrane biophysical properties in plant acclimation to chilling. These findings contribute to the understanding of the impact of lipid remodeling on biophysical modifications in plant roots.
Article
Biochemistry & Molecular Biology
Diletta Ami, Barbara Sciandrone, Paolo Mereghetti, Jacopo Falvo, Tiziano Catelani, Cristina Visentin, Paolo Tortora, Salvador Ventura, Antonino Natalello, Maria Elena Regonesi
Summary: Through expression of ATX3 variants in E. coli, it was found that the pathological ATX3-Q55 induced toxic oligomeric species leading to a reduction in cell growth compared to the physiological ATX3-Q24. Fourier transform infrared microspectroscopy and multivariate analysis were used to monitor protein aggregation and cell perturbations induced by the toxic oligomeric species.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Shani Blumenreich, Doreen Padan Ben-Yashar, Tali Shalit, Meital Kupervaser, Ivan Milenkovic, Tammar Joseph, Anthony H. Futerman
Summary: Gaucher's disease is caused by a defective enzyme called acid beta-glucosidase. This study used a mouse model of neurological Gaucher's disease to identify differentially expressed proteins in the brain. The researchers discovered that a protein called transglutaminase 1 was highly expressed in the brains of the diseased mice. These findings provide further insights into the pathological mechanisms of neurological Gaucher's disease.
JOURNAL OF NEUROCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Maria Joao Moreno, Patricia Alexandra Teles Martins, Eva F. Bernardino, Biebele Abel, Suresh V. Ambudkar
Summary: This study characterized the lipidome and lipid/protein ratio of membranes from High Five™ insect cells overexpressing mouse P-glycoprotein, providing insight into the lipid environment surrounding P-glycoprotein and its properties. Phosphatidylethanolamines were the most abundant phospholipids, followed by phosphatidylcholines. The membranes also contained negatively charged lipids such as phosphatidylserines, phosphatidylinositols, and phosphatidylglycerols.
Article
Multidisciplinary Sciences
Brandy N. Curtis, Ellysa J. D. Vogt, Kevin S. Cannon, Amy S. Gladfelter
Summary: Most cells can sense and change their shape to carry out cell processes, with the septin cytoskeleton playing a vital role in coordinating shape changes. Septins assemble into higher-order structures and are found in regions of positive curvature on the cell membrane. Reconstituting the septin cytoskeleton in a cell-free system has allowed for the study of assembly mechanisms at high resolution. Understanding how septins assemble and sense curvature at different stages is crucial for understanding cell shape changes.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2022)
Article
Chemistry, Analytical
Shengjie Chen, Shengsen Zhang, Rong Zhu
Summary: Fast and precise measurements of live single-cell biophysical properties are crucial for disease diagnosis and cytopathologic analysis. A computer vision method is proposed to track cell dielectrophoretic movements on a microchip, enabling efficient and accurate measurement of biophysical parameters and in situ extraction of cell texture features. The method achieves high measurement accuracy and efficiency, as well as high classification accuracies for various cell types.
ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Mahshid Keramatnejad, Christine DeWolf
Summary: Ozone exposure has been linked to the development of dry eye disease. This study investigated the effects of ozone exposure on the biophysical properties of three tear film lipid layer (TFLL) model membranes. Ozone exposure led to expansion of molecular areas in the films, significant morphological changes, and differential impacts on the viscoelastic properties. These findings were correlated to chemical changes in the lipids.
Review
Biophysics
Ahsan Ausaf Ali, Yousef Bagheri, Mingxu You
Summary: Lipid-DNA conjugates have unique properties such as programmability, fast and efficient membrane insertion, and precise sequence-specific assembly, which have enabled a wide range of biophysical applications on live cell membranes. Tremendous progress has been made in regulating the biophysical features of these conjugates and their key applications in studying cell membrane biophysics, especially in recent years.
QUARTERLY REVIEWS OF BIOPHYSICS
(2022)
Review
Construction & Building Technology
Bin Yang, Yonghui Yang, Zhenting Huo, Yueyang Yu
Summary: Polyvinyl chloride (PVC) and polyvinylidene fluoride (PVDF) are widely used membrane materials in large-span structures due to their excellent performance and low cost. However, their service performance can be reduced by aging and deterioration caused by the external environment. This study analyzes and compares the mechanical properties, tests, elastic-plastic models, and aging mechanisms of PVC and PVDF membranes, clarifying their fundamental aging characteristics. The aging-related fundamentals and associated problems of PVC and PVDF membranes are summarized, and suggestions for future studies are provided.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Neurosciences
Casey L. Mahoney-Crane, Megha Viswanathan, Dreson Russell, Rachel A. C. Curtiss, Jennifer Freire, Sai Sumedha Bobba, Sean D. Coyle, Monika Kandebo, Lihang Yao, Bang -Lin Wan, Nathan G. Hatcher, Sean M. Smith, Jacob N. Marcus, Laura A. Volpicelli-Daley
Summary: The most common genetic risk factor for Parkinson's disease is heterozygous mutations GBA1, which leads to reduced glucocerebrosidase activity and accumulation of abnormal α-synuclein. This study used GBA1+/L444P mice to investigate its effects on lipid metabolism, synaptic protein expression, behavior, and α-syn inclusion formation.
JOURNAL OF NEUROSCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Seyed Ali Fatahian, Alireza Motavalizadehkakhky, Malihesadat Hosseiny, Seyed Mohammad Mahdi Nouri, Rahele Zhiani, Mojtaba Sohrabpour, Mehdi Khanmohammadi
Summary: Cell-laden filament-like hydrogels with superior mechanical properties and biocompatibility were prepared using a microfluidic system. The hybrid microfibers, composed of silk and hyaluronic acid derivatives, were fabricated in tunable size distribution and exhibited significantly higher tensile strength and maximum strain compared to single hyaluronic acid fibers. The encapsulation and crosslinking process did not affect cell viability, and the cells were able to continue growing within the fabricated tissue.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Biochemistry & Molecular Biology
Maria C. C. Klaiss-Luna, Malgorzata Jemiola-Rzeminska, Kazimierz Strzalka, Marcela Manrique-Moreno
Summary: Host defense peptides are natural antimicrobial agents that have potential therapeutic use. LTX-315, a recently reported peptide, has shown promising oncolytic activity, but its interaction with membranes has not been well studied. This research investigated the interaction of LTX-315 with eukaryotic lipids using artificial systems, and found a strong interaction with phosphatidylserine. These findings contribute to the understanding and development of improved anticancer peptides.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Marcela-Elisabeta Barbinta-Patrascu, Sorina Iftimie, Nicoleta Cazacu, Diana Lavinia Stan, Andreea Costas, Adriana Elena Balan, Claudia Gabriela Chilom
Summary: Protein-based nanoparticles, particularly albumin nanoparticles, are important in nanomedicine for drug delivery. They possess special properties, such as biocompatibility and biodegradability, making them advantageous for biomedical applications. In this study, bovine serum albumin nanoparticles were prepared using different nanoprecipitation methods and characterized using UV-Vis spectroscopy, SEM, and AFM. The stability of the nanoparticles was monitored over time, and biohybrids containing the nanoparticles and chlorophyll-labeled artificial cell membranes were developed and characterized. These findings have potential applications in novel drug carrier systems and bio-coatings for the biomedical field.
Article
Biotechnology & Applied Microbiology
Steffen Schmidt, Sandra F. Gallego, Iris Daphne Zelnik, Sergey Kovalchuk, Nanna Albaek, Richard R. Sprenger, Charlotte Overup, Yael Pewzner-Jung, Anthony H. Futerman, Marie W. Lindholm, Ole N. Jensen, Christer S. Ejsing
Summary: Emerging clinical data show that three ceramide molecules, Cer d18:1/16:0, Cer d18:1/24:1, and Cer d18:1/24:0, are biomarkers of a fatal outcome in patients with cardiovascular disease. This study developed a potent N-acetylgalactosamine-conjugated antisense oligonucleotide that specifically targets ceramide synthase 2 in hepatocytes. Results demonstrate that this compound effectively reduces ceramide synthase 2 mRNA level, leading to lower protein expression and activity as well as ceramide levels in the liver. Interestingly, the hepatocyte-specific antisense oligonucleotide also modulates blood plasma ceramides, suggesting that these biomarkers are regulated by ceramide biosynthesis in hepatocytes.
Editorial Material
Biochemistry & Molecular Biology
Manuel Prieto
Summary: This note summarizes Robert W. Cowgill's study in 1963 on the effects of substituents in indole and phenol compounds as models for tryptophan and tyrosine. It aims to contextualize the research within the field of protein fluorescence and highlight its relevance and impact.
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Sarka Pokorna, Ana E. Ventura, Tania C. B. Santos, Martin Hof, Manuel Prieto, Anthony H. Futerman, Liana C. Silva
Summary: This study provides a thorough analysis of the factors that can lead to variability in Laurdan GP measurements and suggests approaches to improve data quality. It also demonstrates the impact of cell culture conditions on GP determination.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Tania C. B. Santos, Tamir Dingjan, Anthony H. Futerman
Summary: This article discusses the complexity of lipid synthesis in modern cell membranes, specifically focusing on sphingolipids (SLs). The authors introduce the concept of the 'anteome', which describes the network of metabolic pathways that must have evolved to allow for the synthesis of SLs. They also suggest that current models of life origins and evolution lack sufficient experimental evidence to explain the appearance of this complex metabolic pathway and its anteome.
Article
Multidisciplinary Sciences
Jiyoon Kim, Yael Pewzner-Jung, Tammar Joseph, Shifra Ben-Dor, Anthony H. Futerman
Summary: In this study, we generated a CerS6 mouse model using CRISPR-Cas9 technology and found that replacing the DDRSDIE motif in CerS6 may affect an unknown mechanism of regulation of ceramide synthesis in vivo, resulting in significantly reduced ceramide levels. By crossing CerS6(ADAAAIA) mice with CerS5 null mice, we demonstrated that other ceramide species with different acyl chain lengths may compensate for the depletion of C16-ceramide levels.
Article
Biochemistry & Molecular Biology
Luis Borges-Araujo, Marina E. Monteiro, Dalila Mil-Homens, Nuno Bernardes, Maria J. Sarmento, Ana Coutinho, Manuel Prieto, Fabio Fernandes
Summary: Despite its low abundance, PI(4,5)P-2 plays a key role in membrane-associated signaling events in eukaryotic cells. The presence of physiological divalent cations can affect the clustering of PI(4,5)P-2 and its interactions with proteins, which can have a significant impact on the organization and downstream interactions of PI(4,5)P-2-binding proteins in the plasma membrane. This study characterizes the effects of Ca2+ on the organization and protein-protein interactions of PI(4,5)P-2-binding proteins, providing insights into the complex regulation of PI(4,5)P-2 in cell signaling.
Article
Neurosciences
Shani Blumenreich, Tamar Nehushtan, Or B. Barav, Jennifer T. Saville, Tamir Dingjan, John Hardy, Maria Fuller, Anthony H. Futerman
Summary: In the past decade, several genetic risk factors, including GBA variants, have been identified for Parkinson's Disease (PD). This study analyzes lipid levels in different brain regions of PD patients with GBA mutations and suggests that changes in ganglioside levels may contribute to the association between PD and GBA mutations.
NPJ PARKINSONS DISEASE
(2022)
Article
Physics, Multidisciplinary
M. A. Vysotin, I. A. Tarasov, A. S. Fedorov, S. N. Varnakov, S. G. Ovchinnikov
Summary: The possibility of growing thin Mn2GaC MAX phase films on Al2O3 substrates with different orientations and their magnetic properties have been studied. The most favorable orientation relationships and interface planes have been predicted, indicating the possibility of growth on various sapphire substrates. The magnetic properties of the Mn2GaC films and their transition from antiferromagnetic to ferromagnetic state have been evaluated.
Article
Biochemistry & Molecular Biology
Tiago P. Dias, Sandra N. Pinto, Sandra Carvalho, Tiago G. Fernandes, Fabio Fernandes, Maria Margarida Diogo, Maria C. Peleteiro, Manuel Prieto, Joaquim M. S. Cabral
Summary: This study demonstrates the development of a culture system that supports the self-organization of hiPSC-derived cardiac microtissues. It combines manual aggregation, Matrigel encapsulation, and dynamic culture to enhance cardiac differentiation and the formation of organized structures. Furthermore, VEGF supplementation enhances the emergence of microvessel-like structures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Aleksandr S. Fedorov, Anastasiia S. Teplinskaia
Summary: In this study, the thermal properties of silicon-based nanomaterials were analyzed using molecular dynamics calculations. The heat capacity, thermal conductivity, effusivity, diffusivity, and phonon density of states were examined in detail for different types of silicon materials. It was found that the heat capacity of these materials increased with an increase in the area of the porous inner surface and upon passivation with different ions. The thermal conductivity of the materials also depended on their porosity and could be significantly changed by passivating the inner surface with different ions. The findings provide important insights for tuning the thermal properties of new nanostructured materials.
Article
Cell & Tissue Engineering
Tiago P. Dias, Tania Baltazar, Sandra N. Pinto, Tiago G. Fernandes, Fabio Fernandes, Maria Margarida Diogo, Manuel Prieto, Joaquim M. S. Cabral
Summary: A xeno-free differentiation platform for human induced pluripotent stem cells (hiPSCs) was established, allowing efficient differentiation into cardiomyocytes (CMs). The replating step and integration with purification/enrichment metabolic approaches improved CM yield and purity, while maintaining CM sheet integrity and functionality.
STEM CELLS INTERNATIONAL
(2022)
Article
Multidisciplinary Sciences
Iris D. D. Zelnik, Beatriz Mestre, Jonathan J. J. Weinstein, Tamir Dingjan, Stav Izrailov, Shifra Ben-Dor, Sarel J. J. Fleishman, Anthony H. H. Futerman
Summary: Researchers validate a one-step algorithm called mPROSS for stabilizing membrane proteins directly from an AlphaFold2 model structure. By applying this algorithm to ceramide synthase, they obtained a more stable form of human CerS2 enzyme through 37 designed mutations. With the help of molecular dynamics simulations, a potential pathway for substrate delivery to ceramide synthases is proposed.
NATURE COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Shani Blumenreich, Doreen Padan Ben-Yashar, Tali Shalit, Meital Kupervaser, Ivan Milenkovic, Tammar Joseph, Anthony H. Futerman
Summary: Gaucher's disease is caused by a defective enzyme called acid beta-glucosidase. This study used a mouse model of neurological Gaucher's disease to identify differentially expressed proteins in the brain. The researchers discovered that a protein called transglutaminase 1 was highly expressed in the brains of the diseased mice. These findings provide further insights into the pathological mechanisms of neurological Gaucher's disease.
JOURNAL OF NEUROCHEMISTRY
(2023)
Article
Chemistry, Physical
Aleksandr S. Fedorov, Maxim A. Visotin, Egor Eremkin, Pavel O. Krasnov, Hans Agren, Sergey P. Polyutov
Summary: This study analyzes charge-transfer plasmons (CTP) in complexes of metal nanoparticles bridged by conductive molecular linkers using a statistic approach. It is found that the frequency distribution of CTP in the generated nanoparticle complexes is very inhomogeneous, with narrow and broad peaks corresponding to different types of plasmon oscillations. The study also proposes modifications to calculate the CTP energy absorption in an external electromagnetic field and demonstrates wide and monotonic absorption in the IR region for systems containing a large number of bridged nanoparticles.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Meeting Abstract
Biochemistry & Molecular Biology
T. Sousa, G. Damas, N. Bernardes, A. Coutinho, M. Prieto, A. M. Melo
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)
