Article
Environmental Sciences
Andrew Loh, Donghwi Kim, Joon Geon An, Narin Choi, Un Hyuk Yim
Summary: Studies on the land-sea-air interactions of aerosols, which play a significant role in global environmental changes, are scarce. In this study, we investigated potential sources of sub-micron aerosols over the East Sea and measured their chemical compositions using a high-resolution aerosol mass spectrometer. The results showed higher aerosol concentrations in industrialized coastal areas compared to offshore regions. Five distinct sources of aerosols were identified, and the spatiotemporal variation of MSA and MSA:SOa- over the East Sea were determined for the first time.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Peter A. Alpert, Jing Dou, Pablo Corral Arroyo, Frederic Schneider, Jacinta Xto, Beiping Luo, Thomas Peter, Thomas Huthwelker, Camelia N. Borca, Katja D. Henzler, Thomas Schaefer, Hartmut Herrmann, Joerg Raabe, Benjamin Watts, Ulrich K. Krieger, Markus Ammann
Summary: Research shows that sunlight can induce stable reactive oxygen species and carbon-centered radicals in organic aerosol particles containing iron. Laboratory experiments demonstrate radical formation, release, as well as iron oxidation and mass loss in photoactive organic particles. The study suggests that fast radical reaction and slow diffusion near viscous organic particle surfaces can lead to oxygen depletion, radical trapping, and humidity-dependent oxidation.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Subash Reddy Kolan, Rui Wang, Torsten Hoffmann, Evangelos Tsotsas
Summary: This study investigates the formation of heteroaggregates from sub-micron particles in ProCell type spouted bed equipment. The high inlet air velocities in the special spouted bed can promote aggregate breakage and rearrangement. The mixing of sub-micron sized particles is achieved at the sub-agglomerate level, as shown by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).
Article
Engineering, Environmental
Andrew Loh, Donghwi Kim, Kyucheol Hwang, Joon Geon An, Narin Choi, Sangmin Hyun, Un Hyuk Yim
Summary: Using a high-resolution time-of-flight aerosol mass spectrometer, this study found that the emissions from ships in the anchorage zone contribute significantly to air pollution in the Busan Port area, especially for oxidized organic aerosols. The concentration of pollutants in the air correlated with wind direction, with the highest concentrations observed when the winds came from the anchorage zone and the lowest concentrations when the winds came from the open ocean. The emissions from ship activities in the anchorage zone were calculated, and the results indicate that they are an important source of pollution in the Busan Port area.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Applied
Beatrice Russo, Emma Piacentini, Fabio Bazzarelli, Gabriele Calderoni, Paolo Vacca, Alberto Figoli, Lidietta Giorno
Summary: Ionotropic gelation (IG) is an attractive method for synthesizing water-soluble polymeric nanoparticles and sub-micron particles. The technique relies on the electrostatic interaction between ionic species of opposite charge. However, achieving size control in conventional bench-top processes is challenging. This study explores the combination of membrane dispersion technology with IG as a scalable method for producing chitosan sub-micron particles.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Fan Zhang, Renjie Ji, Xiaoyang Zhu, Hongke Li, Yating Wang, Jingpeng Wang, Fei Wang, Hongbo Lan
Summary: This study proposes a collaborative strategy based on defect induction and doping to prepare strain-regulated Pt-NiO@Ni sub-micron particles. These particles with tensile strain and Pt-doped can effectively optimize the electronic distribution of atomic structures in Pt and NiO on the surface, reducing the energy barrier of intermediates for ORR and OER. As a result, the Pt-NiO@Ni SP exhibits outstanding bifunctional catalytic activity and the Pt-NiO@Ni SP-based liquid zinc-air battery shows high open-circuit potential, excellent energy density, and favorable cyclic charge-discharge cycling durability. This work provides an innovative avenue for the rational construction of highly active bifunctional electrocatalysts for practical applications.
Article
Environmental Sciences
Avishek Ray, G. Pandithurai, S. Mukherjee, V. Anil Kumar, A. Hazra, Rohit D. Patil, V. Waghmare
Summary: This study presents the hygroscopicity (x) of size segregated aerosol over a High Altitude Cloud Physics Laboratory (HACPL) in the Western Ghats, India. The results show the seasonal variation of hygroscopicity and the influence of size on aerosol hygroscopicity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Mingming Sun, Wei Guo, Meiyu Meng, Qiuyu Zhang
Summary: Benefitting from the tunable heterogeneous interface and electronic interaction, metal-polymer-based hybrid composites have attracted attention. The synthesis methodology and structure-performance relationship need to be improved. In this study, an anisotropic eccentric Ag@polyaniline (PANI) particle was successfully fabricated by resolving the dynamics issue in the Ag+-aniline reaction system. The study demonstrates the synergy mechanism of polyvinyl pyrrolidone (PVP) and in-situ generated PANI for modifying the dynamic reaction interface and provides an inspiring concept of eccentric microstructure engineering.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Haili Sun, Wei Wei, Fengxia Liu, Xiaofei Xu, Zhiyi Li, Zhijun Liu
Summary: Sub-micron-sized LiNi0.5Mn1.5O4 (LNMO) with uniform size distribution was successfully synthesized using oleylamine-assisted solid-state method. The LNMO sample modified by oleylamine exhibited improved electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Citlali Alejandra Marin-Flores, Odin Rodriguez-Nava, Margarita Garcia-Hernandez, Rosario Ruiz-Guerrero, Fernando Juarez-Lopez, Angel de Jesus Morales-Ramirez
Summary: ZnO particles were synthesized and their free radical scavenging activity properties were evaluated in this study. The results showed that the scavenging activity increased with smaller particle size and lower ZnO dosage. A pseudo-first-order kinetics model may be present in the reaction.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Thermodynamics
Xiaolong Li, Yueming Wang, Jost O. L. Wendt
Summary: This paper investigates the effect of pressure on sub-micron ash aerosol characteristics during oxy-coal combustion and discusses the changes in aerosol composition at different pressures. The results indicate that with increasing combustion pressure, there are significant changes in particle distribution and composition of ash aerosols.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Pharmacology & Pharmacy
Jakob Hubner, Jean-Baptiste Coty, Yan Busby, Denis Spitzer
Summary: Surface enhanced Raman spectroscopy (SERS) and confocal Raman microscopy were used to analyze the structure and molecular arrangement of sub-micron furosemide/PVP particles produced by spray flash evaporation. The results showed that the particles mainly consisted of PVP molecules on the surface, with primary furosemide nanocrystals agglomerated in a thin PVP matrix. This combination of techniques was effective for investigating organic sub-micron composites.
JOURNAL OF PHARMACEUTICAL ANALYSIS
(2021)
Article
Meteorology & Atmospheric Sciences
Norman T. O'Neill, Keyvan Ranjbar, Liviu Ivanescu, Thomas F. Eck, Jeffrey S. Reid, David M. Giles, Daniel Perez-Ramirez, Jai Prakash Chaubey
Summary: The study compares the sub-micron aerosol optical depth (AOD) derived from AERONET inversion and spectral deconvolution algorithm, and proposes a linear equation to explain the relationship between sub-micron AOD and fine-mode AOD. The results reveal that the behavior of sub-micron fraction versus fine-mode fraction depends on the truncation of coarse-mode AOD and fine-mode AOD. The study confirms that the impact of truncating modal features can be detected through the analysis of sub-micron fraction versus fine-mode fraction.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2023)
Article
Engineering, Environmental
Steven J. Campbell, Battist Utinger, Alexandre Barth, Suzanne E. Paulson, Markus Kalberer
Summary: The oxidative potential (OP) of particulate matter is a key metric for assessing atmospheric particle toxicity. This study used two novel online instruments to quantify particle OP and investigated the influence of Fe(II) and Cu(II) on the OP of secondary organic aerosol (SOA). Synergistic and antagonistic interactions were observed when Fe(II) and Cu(II) were mixed with representative biogenic and anthropogenic SOA. A kinetic model revealed important reactions among SOA components, transition metals, and ascorbate, impacting the OP.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Steven J. Campbell, Battist Utinger, Alexandre Barth, Suzanne E. Paulson, Markus Kalberer
Summary: This study presents a novel approach using two online instruments to quantitatively measure the oxidative potential (OP) of particulate matter. It investigates the influence of Fe(II) and Cu(II) on secondary organic aerosol (SOA) and reveals a range of synergistic and antagonistic interactions. The results provide new insights into the influence of metal and SOA interactions on particle OP.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Letter
Anesthesiology
A. J. Shrimpton, J. M. Brown, T. M. Cook, A. E. Pickering
Article
Chemistry, Physical
John W. Niman, Benjamin S. Kamerin, Vitaly V. Kresin, Jan Krohn, Ruth Signorell, Roope Halonen, Klavs Hansen
Summary: The abundance spectra of (CO2)(N) clusters were analyzed under a wide range of adiabatic expansion conditions, revealing a universal pattern in cluster stability functions. Individual cluster properties, size-dependent cluster binding energies, shell and subshell closing sizes, and cuboctahedral packing ordering for larger sizes were identified through the analysis. The study demonstrates that even a small variation in dissociation energies can lead to significant abundance variations, especially for larger clusters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Anesthesiology
A. J. Shrimpton, G. O'Farrell, H. M. Howes, R. Craven, A. R. Duffen, T. M. Cook, J. P. Reid, J. M. Brown, A. E. Pickering
Summary: Aerosol-generating procedures, such as awake tracheal intubation and nasendoscopy, can generate high concentrations of respiratory aerosols. Specific risks include lidocaine spray of the larynx, instrumentation of the vocal cords, procedural coughing, and deep breaths. Airborne infection control precautions are necessary for awake upper airway endoscopy if respirable pathogens cannot be confidently excluded.
Article
Chemistry, Physical
Stefan Feusi, Jan Krohn, Chenxi Li, Ruth Signorell
Summary: The interaction of water with different substances in the earth's atmosphere and its contribution to the water vapor phase transition is still unclear. This study provides the first measurements of water-nonane binary nucleation and unary nucleation data in the 50-110 K temperature range. The experiments show that hetero-molecular clusters do not play a role during nucleation, and the nucleation rates of water and nonane are not significantly affected by the presence of the other species.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Robin Stoodley, Kerry J. Knox, Elizabeth A. L. Gillis
Summary: This study critically evaluates the applicability of the Cognitive Tasks of Experimental Research inventory to chemistry laboratory teaching and applies it to an upper-level laboratory course. The research highlights patterns in the prevalence of different cognitive tasks in the course and identifies differences between organic chemistry experiments and other subdisciplines. The study contributes to the debate about the role and aims of laboratory instruction in chemistry and provides a tool for chemistry educators to reflect upon their practice and curriculum.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Chemistry, Physical
Daniel A. . Hardy, Joshua F. Robinson, Thomas G. Hilditch, Edward Neal, Pascal Lemaitre, Jim S. Walker, Jonathan P. Reid
Summary: This paper introduces a refined numerical model for the evaporation and transport of droplets of binary solutions. The model is validated against other models in the literature and experimental measurements of trapped and freefalling droplets. It accurately represents the behavior of solution droplets in different regimes, accounting for hygroscopic behavior and the Kelvin effect. Simulations of pure water evaporation and sodium chloride droplets are validated experimentally, and the simulations accurately represent the experimental data. The model is also used to analyze the morphologies of dried sodium chloride particles at different drying rates.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Multidisciplinary Sciences
Sebastian Hartweg, Jonathan Barnes, Bruce L. Yoder, Gustavo A. Garcia, Laurent Nahon, Evangelos Miliordos, Ruth Signorell
Summary: Low-energy electrons dissolved in liquid ammonia or aqueous media can serve as powerful reducing agents but can also cause radiation damage to biological tissue. The mechanistic processes underlying electron transfer steps are still not fully understood. This study demonstrates how ultraviolet (UV) photoexcitation of metal-ammonia clusters can be used to generate tunable low-energy electrons. The UV light-induced generation of spin-paired solvated dielectrons and their subsequent relaxation through unconventional electron transfer-mediated decay offer an efficient source of low-energy electrons. This process has the potential to improve our understanding of radiation damage and facilitate mechanistic studies of solvated electron reduction reactions.
Article
Microbiology
Henry P. P. Oswin, Allen E. E. Haddrell, Cordelia Hughes, Mara Otero-Fernandez, Richard J. J. Thomas, Jonathan P. P. Reid
Summary: Using CELEBS, researchers found that the decay of Escherichia coli in airborne droplets is influenced by factors such as residence time and oxygen concentration. The presence of oxygen facilitates the formation of reactive oxygen species, leading to bacterial death.
MICROBIOLOGY SPECTRUM
(2023)
Article
Anesthesiology
A. J. Shrimpton, V. Brown, J. Vassallo, J. P. Nolan, J. Soar, F. Hamilton, T. M. Cook, B. R. Bzdek, J. P. Reid, C. H. Makepeace, J. Deutsch, R. Ascione, J. M. Brown, J. R. Benger, A. E. Pickering
Summary: Cardiopulmonary resuscitation generates high concentrations of respiratory aerosol, suggesting the need for airborne transmission precautions in high-risk pathogen settings.
Article
Chemistry, Physical
Jonathan V. Barnes, Dominique P. Borgeaud Dit Avocat, Edith Simmen, Huanyu Yang, Bruce L. Yoder, Ruth Signorell
Summary: Using experimental and simulation methods, this study compares the magnetic properties of different neutral sodium-doped solvent clusters. It is found that clusters with longer spin transition times exhibit better deflection, while other clusters show reduced deflection. The observed magnetic deflection behavior is correlated to the number of excited rotational states in the clusters.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Cell & Tissue Engineering
V. Hamilton, S. Sheikh, A. Szczepanska, N. Maskell, F. Hamilton, J. P. Reid, B. R. Bzdek, J. R. D. Murray
Summary: This study quantifies the aerosol exposure in orthopaedic surgeries and suggests additional precautions for diathermy and bone sawing to reduce exposure.
BONE & JOINT RESEARCH
(2023)
Article
Environmental Sciences
Thomas G. Hilditch, Daniel A. Hardy, Natasha J. Stevens, Peter B. Glover, Jonathan P. Reid
Summary: Organic aerosol is a complex mixture of compounds with diverse physico-chemical properties. Due to the lack of experimental data, these properties need to be estimated, leading to uncertainties in their gas-particle partitioning and impact on human health and climate.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2023)
Article
Environmental Sciences
Oliver Reich, Michael J. J. Gleichweit, Gregory David, Nicole Leemann, Ruth Signorell
Summary: Sea salt aerosol is abundant in the atmosphere and its hygroscopicity plays a crucial role in its interaction with solar radiation. Conflicting values for its hygroscopic growth have been reported, impacting the accuracy of climate modeling. We present new values of hygroscopic growth for atmospheric sea salt, obtained through optical trapping and single particle mass measurement. Our findings reconcile discrepancies in previous studies and also reveal the crystallization of gypsum at higher relative humidity.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2023)
Article
Chemistry, Physical
Lauren P. McCarthy, Peter Knapp, Jim S. Walker, Justice Archer, Rachael E. H. Miles, Marc E. J. Stettler, Jonathan P. Reid
Summary: This study experimentally investigates the dynamics of binary collisions of equi-diameter droplets with different impact speeds and angles, and compares the results with collision outcome prediction models. The experimental results show that different impact speeds and angles lead to different collision outcomes. This study provides reference for predicting collision outcomes of droplets.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Loren Ban, Hanchao Tang, Bruce L. Yoder, Ruth Signorell
Summary: In this study, photoemission from submicrometer droplets containing a mixture of dioctyl phthalate and dioctyl sebacate was investigated using femtosecond and nanosecond photoionization techniques. The results showed significant differences in the photoelectron spectra between ionization with nanosecond and femtosecond laser pulses, attributed to ionization of long-lived states within the duration of the nanosecond pulse. The decay dynamics of these long-lived states were investigated using a nanosecond-femtosecond pump-probe scheme, and an accelerated decay rate was observed at higher dioctyl phthalate concentrations. Additionally, the decay dynamics were found to be faster in smaller droplets and neutral droplets compared to charged droplets, suggesting the influence of droplet size and charge.
FARADAY DISCUSSIONS
(2022)
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)