Article
Chemistry, Physical
Laura Mihai, Gabriel Caruntu, Aurelian Rotaru, Daniela Caruntu, Vasyl Mykhailovych, Cristina Elena Ciomaga, Nadejda Horchidan, Andrei Stancalie, Aurelian Marcu
Summary: BaTiO3 (BTO) nanoparticles were incorporated into various flexible materials for the fabrication of flexible electronic devices. The dielectric properties of these materials were tested using time domain spectroscopy in the frequency range of 30 GHz-2 THz. The dielectric performances of different materials with varying nanoparticle concentrations (up to 40 wt.%) embedded in gelatin, epoxy, and styrene-butadiene were compared at temperatures ranging from 0 degrees C to 120 degrees C. Optimal nanoparticle concentrations were found to be matrix-dependent, with the best composite performances achieved by the BTO-SBS matrix (2 wt.% filler concentration) and the BTO-gelatin matrix (40 wt.% filler concentration).
Article
Physics, Multidisciplinary
J. L. Allen, T. J. Sanders, J. Horvat, R. A. Lewis, K. C. Rule
Summary: Density-functional theory is used to predict the frequency and dipole moment of molecular crystals' fundamental oscillations. However, previous studies have had shortcomings, such as the use of impure and diluted materials and the inability to distinguish different vibrational modes. This study overcomes these obstacles by analyzing the low-temperature polarized THz spectra of single-crystal L-alanine and comparing them with density-functional theory calculations, resulting in corrected mode assignments and the discovery of unreported modes.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Applied
Anastasija Konstantinova, Liga Avotina, Gunta Kizane, Aleksandrs Puckins, Sergejs Osipovs, Elena Kirilova
Summary: The substitution reaction of 3-N-(2-chloroacetamido)benzanthrone with various amino acids and the possibility of fluorescent labelling of amino acids using this halogenated benzanthrone have been studied. Arginine was found to be the most reactive amino acid in the reaction. The spectral behavior of the new benzanthrone derivatives depends on the polarity of the medium and exhibits fluorescent solvatochromism due to intramolecular charge transfer. The synthesized compounds show promise for studying peptides and proteins, as well as visualizing biological objects.
Article
Construction & Building Technology
Nicole Dilissen, Jef Vleugels, Jules Vermeiren, Beatriz Garcia-Banos, Juan Rafael Sanchez Marin, Jose M. Catala-Civera
Summary: This study focuses on the microwave (MW) dehydration and clinkering of hydrated cement paste, specifically investigating the MW-material interaction during heating to 1100 degrees C. The dielectric properties of various cement components were measured, and their changes were correlated to phase changes detected through different analysis methods. The research shows that ordinary Portland Cement (OPC) can be effectively MW heated, and the dielectric properties of hydrated cement contribute to its efficient heating process. The recovery of clinker phases demonstrates the potential for cement retrieval from hydrates.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Lisanne Sellies, Ruud L. E. G. Aspers, Martin C. Feiters, Floris P. J. T. Rutjes, Marco Tessari
Summary: In recent years, the scope of non-hydrogenative parahydrogen hyperpolarization (nhPHIP) techniques has been expanding, allowing for the detection and quantification of unmodified alpha-amino acids in complex mixtures. This method has shown great potential as demonstrated in human urine samples.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
S. Radhakrishnan, T. Hager, A. Kanaherarachchi, C. Williams, G. E. Hall, B. M. Broderick
Summary: A new instrument utilizing buffer gas cooling and mm-wave rotational spectroscopy is introduced to study molecules desorbed from astrochemical ices. The design and performance of the buffer gas cell, mm-wave spectrometer, and data acquisition system are reported, with future application to desorbed molecules discussed in forthcoming publications.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Georg Sterzl, Utpal Dey, Jan Hesselbarth
Summary: Dielectric properties of various liquids were determined by analyzing the frequency detuning effects of different millimeter-wave resonators, using a resonator fixture operating at 190 GHz and exposing subnanoliter amounts of liquid in a glass tube. The extracted data matched well with properties obtained from Debye models, and the measurement sensitivity was discussed with respect to frequency shift and dielectric contrast. The obtained sensitivity figure-of-merit outperformed alternative techniques at such high frequency.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Chemistry, Physical
Meng Sun, Zhenning Yan, Wenwen Chu
Summary: The molecular interactions between the active pharmaceutical ingredient ionic liquid domiphen salicylate ([Dom][Sal]) and some amino acids in aqueous solution were studied. The properties of the amino acids in the solution were determined, and the effects of temperature, concentration, and the length of the amino acid chain on these properties were discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Haiyang Gao, Mo Xiong, Chuncai Kong, Zhimao Yang, Tao Yang
Summary: The cation-pi interaction is important in various chemical and biological processes. This study investigated the cation-pi interaction between hydrated Na+-phenylalanine clusters in a water-aqueous environment. The addition of water molecules changed the structures of Na+(Phe)(H2O)(n) from tridentate complexes to quadridentate or pentadentate complexes, while the cation-pi interaction remained. The fluctuation between quadridentate and pentadentate complexes was caused by the competition between cation-O bonding and hydrogen bonding.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Food Science & Technology
Chunning Luan, Min Zhang, Sakamon Devahastin, Yaping Liu
Summary: By utilizing two-step fermentation with LAB and Saccharomyces cerevisiae, the quality of horseradish sauce can be improved, with increased amino acid content, antioxidant activities, and flavorful compounds. Evaluation using electronic tongue and sensory analysis can determine the overall sensory quality of the sauce.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Viktor Paczelt, Raffael C. Wende, Peter R. Schreiner, Andre K. Eckhardt
Summary: In this study, the formation and spectroscopic characterization of glycine imine, the simplest imino acid, were reported using cryogenic matrix isolation IR and UV/Vis spectroscopy. Glycine imine was found to form after UV irradiation of 2-azidoacetic acid and could be interconverted between anti-(E,E)- and anti-(Z,Z)-conformations. In aqueous solution, glycine imine hydrolyzed to produce hydroxy glycine and hydrated glyoxylic acid. It was also observed that glycine imine could undergo self-reduction by oxidative decarboxylation chemistry when present in higher concentrations or in the presence of (FeSO4)-S-II as a reducing agent.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Youngoh Kim, Joonmyung Choi
Summary: The coupling relationship between ionic thermodynamics and electron kinetics near fluid-solid interfaces is crucial. This study investigates the chemo-mechano-structural interplay of hydrated ion clusters using all-atom model computations. The results unveil the importance of the intrinsic structure and charged state of ions in determining the properties of the hydrated ion clusters, as well as the impact of water ligand arrangement and network structure on electron kinetics.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Food Science & Technology
Claudia Maccio, Andrea Melis, Matteo Bruno Lodi, Emanuele Garau, Francesco Desogus, Antonio Loddo, Fabrizio Di Napoli, Giuseppe Mazzarella, Alessandro Fanti
Summary: Carasau bread, a type of flat bread from Sardinia (Italy), has a growing market potential, and its industry is undergoing digitalization and automation. Microwave sensors can be a cost-effective solution to monitor the quality of this food product. In this study, the microwave response of Carasau dough was analyzed through dielectric spectroscopy, and it was found that water content significantly affects the dielectric properties. The results can be used to design a microwave sensor for composition analysis of Carasau bread doughs.
Article
Engineering, Electrical & Electronic
An Zhang, Daisuke Kawashima, Hiromichi Obara, Masahiro Takei
Summary: The boundary reflection derivation method aims to clarify intracellular structure changes between the cell wall, membrane, and cytoplasm in different frequency ranges. Through dielectric properties extraction and reflection coefficient calculation, differences in boundary reflection coefficients under various conditions are observed.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Optics
Won Jin Choi, Keiichi Yano, Minjeong Cha, Felippe M. Colombari, Ji-Young Kim, Yichun Wang, Sang Hyun Lee, Kai Sun, John M. Kruger, Andre F. de Moura, Nicholas A. Kotov
Summary: Chiral phonons in biocrystals have been observed by terahertz chiroptical spectroscopy, providing insights into the structure and properties of biomolecules and the ability to identify differences in formulations.
Article
Chemistry, Physical
Jorge H. Melillo, Jan Swenson, Silvina Cerveny
Summary: This study investigates the dynamics of tri-propylene glycol (3PG) and e-poly (lysine) (e-PLL) in semi-crystalline water solutions using broadband dielectric spectroscopy and calorimetric measurements. The amount of ice formed depends on the annealing time and temperature, which in turn affects the dynamics of the amorphous part of the samples. However, the observed differences are relatively small for the studied degrees of crystallinity. The water dynamics show a single crossover at the calorimetric glass transition temperature (Tg), unaffected by the partial crystallization.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Nicolas Torasso, Alicia Vergara-Rubio, Reinaldo Pereira, Javier Martinez-Sabando, Jose Roberto Vega Baudrit, Silvina Cerveny, Silvia Goyanes
Summary: The problem of arsenic contamination in water requires sustainable and scalable solutions. This study presents a simple, efficient, and green method for increasing adsorption capacity by synthesizing ultra-small nanoparticles (IONPs) within electrospun nanofibers. The IONPs alter the properties of the polymeric matrix and can be reused for at least 3 cycles with 80% efficiency. The membranes are also highly effective in removing hexavalent chromium.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
David Picon, Alicia Vergara-Rubio, Santiago Estevez-Areco, Silvina Cerveny, Silvia Goyanes
Summary: The detection of emerging contaminants in bodies of water has become a serious issue, threatening human and ecosystem health. This paper presents the development of a PBAT nanofibrous membrane with clinoptilolite zeolite, which effectively removes tetracycline and methylene blue from water. The resulting hydrophilic membrane showed high adsorption capacity for the pollutants, mainly through cation exchange reactions and chemisorption.
Article
Chemistry, Physical
S. Arrese-Igor, A. Alegria, J. Colmenero
Summary: This work investigates the role of specific non-covalent interactions in the structural relaxation of glass-forming liquids using polar tributyl phosphate. It is found that dipole interactions can couple to shear stress and modify the flow behavior, preventing the occurrence of the simple liquid behavior. The findings contribute to a better understanding of glassy dynamics and the role of intermolecular interactions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Arantxa Arbe, Goran J. Nilsen, Mark Devonport, Bela Farago, Fernando Alvarez, Jose A. Martinez Gonzalez, Juan Colmenero
Summary: By using time-of-flight neutron spectroscopy with polarization analysis, this study separated coherent and incoherent contributions to the scattering of deuterated tetrahydrofuran. The comparison with water reveals similar phenomenology, indicating the influence of inter-molecular interactions on dynamics. The study shows a crossover in the structural relaxation and different characteristic times for collective and self-motions compared to water.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yael Beilinson, Verena Schiller, Julia Regentin, Jorge H. Melillo, Anna Greenbaum, Tatiana Antropova, Silvina Cerveny, Michael Vogel, Yuri Feldman
Summary: The dynamics of water confined in mesoporous materials were studied using a combination of techniques including broadband dielectric spectroscopy, nuclear magnetic resonance, and differential scanning calorimetry. The results show that water confined in MIP samples exhibits a dynamic crossover at around 180 K, while water confined in MAP samples does not show any changes in relaxation behavior. The crossover temperature is found to depend on the hydration level. Below the crossover temperature, water reorientation is isotropic and the dielectric relaxation strength follows a solid-like behavior, while above the crossover temperature, water reorientation is related to long-range diffusion and the dielectric relaxation strength follows a liquid-like behavior. The results are also consistent with a glass transition near 180 K.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Polymer Science
Arantxa Arbe, Juan Colmenero, Numera Shafqat, Angel Alegria, Nicolas Malicki, Severin Dronet, Francesca Natali, Lucile Mangin-Thro, Lionel Porcar
Summary: We used multiple experimental techniques including X-ray diffraction, neutron diffraction, small-angle neutron scattering (SANS), neutron elastic fixed window scans (EFWS), and differential scanning calorimetry (DSC) to investigate polymeric blends of industrial interest. The study focused on mixtures composed of isotopically labeled styrene-butadiene rubber (SBR) and polystyrene (PS) oligomers of size smaller than the Kuhn length. The combination of SANS and DSC allowed us to determine the relevant length scale for alpha-relaxation in these complex mixtures.
Article
Multidisciplinary Sciences
Steven van Kesteren, Laura Alvarez, Silvia Arrese-Igor, Angel Alegria, Lucio Isa
Summary: Endowing materials with the ability to sense, adapt, and respond to stimuli is essential for the progress of autonomous systems. However, transferring these concepts to the microscale presents challenges due to fabrication, design techniques, and internal response schemes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Review
Chemistry, Physical
Javier Martinez-Sabando, Francesco Coin, Jorge H. Melillo, Silvia Goyanes, Silvina Cerveny
Summary: Climate change has led to extreme weather events, causing water scarcity and pollution. To address this issue, pectin-based materials have emerged as an effective solution for detecting and mitigating water pollutants. Pectin, a biodegradable polymer extracted from vegetables, can easily interact with contaminant ions. The versatility of pectin-based materials makes them suitable for various forms and cross-linking methods, enabling the removal of diverse pollutants. This review will summarize existing water remediation technologies with a focus on adsorption, discuss the chemical structure of pectin, and review its application as an adsorbent for water pollutants.
Article
Polymer Science
Bao Wang, Matteo Sanviti, Angel Alegria, Simone Napolitano
Summary: By investigating the dielectric response of thin polymer films, researchers have discovered a genuine molecular process associated with the newly formed liquid phase.
Article
Engineering, Environmental
Javier Martinez-Sabando, Francesco Coin, Juan Carlos Raposo, Aitor Larranaga, Jorge H. Melillo, Silvina Cerveny
Summary: The study developed a novel approach to enhance the remediation capacity of pectin by crosslinking it with different agents. The results showed that dual-cross-linked pectin is a highly effective adsorbent for the simultaneous removal of both heavy metals and pharmaceutical products. This new method has the potential to significantly enhance pectin's remediation capacity, offering a promising solution for the simultaneous removal of multiple pollutants from water.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Fernando Alvarez, Arantxa Arbe, Juan Colmenero
Summary: By conducting massive molecular dynamics simulations, the self- and cross-dipolar contributions to the dielectric relaxation of liquid water have been studied. The results show that cross dipolar correlations are of great importance, accounting for approximately 60% of the total dielectric amplitude. The relaxation function corresponding to the self-contribution is complex, while the cross dipolar relaxation function follows a one-step Debye-like function with a characteristic time comparable to the phenomenological Debye time. Additionally, translation and rotation of water molecules have been examined, showing similar behavior to uncoupled Brownian motion at certain time scales.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Polymer Science
Soheil Sharifi, Isabel Asenjo-Sanz, Ester Verde-Sesto, Jon Maiz, Jose A. Pomposo, Angel Alegria
Summary: In this study, the dissimilar dynamic properties of PTHF-based materials prepared through intra-vs intermolecular click chemistry were investigated. Although the segmental relaxation time and glass transition temperature value were similar, there were evident differences in dynamic heterogeneities, which were attributed to the peculiar morphology of the intra-chain collapsed polymer chains.
Article
Education & Educational Research
Juan Pedro Franco Hidalgo-Chacon, Inigo Rodriguez-Arteche, Ma Mercedes Martinez-Aznar
Summary: After School Programs (ASPs) have been found to have positive benefits in the development of interpersonal competencies, critical thinking and personal maturity of the schoolers. In Spain, a high percentage of students participate in ASPs, with recreational activities being the most popular. Boys are more involved in sports activities, while girls are more likely to enroll in performing arts activities. Most students spend 2 to 4 days per week in these activities, and only a small portion attend afterschool activities at the school. Parents tend to spend a significant amount of money on these activities, and there is a trend towards cognitive extracurricular activities. However, gender bias still exists in the choices made by children.
REVISTA COMPLUTENSE DE EDUCACION
(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)