Article
Physics, Applied
Zhenyu Chen, Xiangyu Wang, C. W. Lim, Fan Shi
Summary: This study investigates the propagation of robust large-area elastic transverse waves in an actively tunable membrane-type acoustic metamaterial. The research focuses on designing a waveguide with multiple degrees of freedom to control the width of the interface mode. By employing a finite element model, the study exhibits topologically protected interface states with tunable degrees of freedom. Furthermore, the study examines the transmission performance of large-area transverse waves at sharp corners.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hyunggeun Lee, Yoon-Gu Kang, Myung-Chul Jung, Myung Joon Han, Kee Joo Chang
Summary: Topological insulators are characterized by Z(2) indices and protected surface states. In dual topological insulators, the topological character is more robust against perturbations. NaZnBi is proposed as a new dual topological insulator with Z(2) invariants and odd mirror Chern numbers, preserving its characteristic Dirac cone even under symmetry breaking perturbations.
NPG ASIA MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Shuzhi Qin, Yicheng Fan, Xiang Qiu, Kun Zhang, Qingguo Feng, Gongwen Gan, Chengdu Wan Sun, Guoqing Gou
Summary: In this study, the phase transition behavior of VO2 nanofilms was modulated by coupling Zr doping and thickness-dependent band gap. It was found that Zr doping can decrease the transition temperature of VO2, and there exists a linear modulation relationship between Zr doping concentration and the MIT temperature of VO2.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Physics, Multidisciplinary
Nikita V. Tepliakov, Johannes Lischner, Efthimios Kaxiras, Arash A. Mostofi, Michele Pizzochero
Summary: In this study, a new perspective on the electronic structure of armchair graphene nanoribbons is presented using simple model Hamiltonians and ab initio calculations. The research demonstrates that the energy-gap opening in these nanoribbons is caused by the breaking of a hidden symmetry through long-ranged hopping of pi electrons and structural distortions at the edges. This hidden symmetry can be restored or manipulated through in-plane lattice strain, enabling continuous energy-gap tuning, the emergence of Dirac points at the Fermi level, and topological quantum phase transitions. This work establishes an original interpretation of the semiconducting properties of armchair graphene nanoribbons and provides guidelines for their rational electronic structure design.
PHYSICAL REVIEW LETTERS
(2023)
Article
Acoustics
C. Gazzola, S. Caverni, A. Corigliano
Summary: Sandwich and composite double panel structures are gaining popularity due to their better sound insulation properties compared to single panel structures. This study introduces a novel acoustic insulation sandwich panel by integrating a metamaterial unit cell with faceplates to achieve an ultra-wide band gap. The panel demonstrates excellent acoustic performance in terms of wave attenuation over a wide frequency range, with critical assessment of solid-air interaction and resonance frequencies using a lumped-parameter model.
Article
Chemistry, Physical
Matthew B. Gray, Jackson D. Majher, Noah P. Holzapfel, Patrick M. Woodward
Summary: The study investigates the structural and optical properties of halide substitutions of Br- and I- into (Cs4MM2Cl12)-M-II-Cl-III, showing that significant bromide incorporation is possible, while iodide incorporation is more limited. The larger halide ions can result in a red shift of the onset of optical absorption, providing insights into stabilizing the vacancy-ordered quadruple perovskite structure.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xi Wu, Fawei Zheng, Feiyu Kang, Jia Li
Summary: By using density functional theory calculations, we have identified the stable intercalated structure and the evolution of band structures in the intercalation process of Li into bilayer graphene. Our work shows that the Dirac cone of bilayer graphene can be modulated by using the generalized N/ N/ Kekule order, which opens a gap or splits the electron and hole pocket, contributed by the Kekule-O and Kekule-Y distortion respectively. This study provides valuable insights for the investigation of Li-intercalated bilayer graphene in experiments.
Article
Chemistry, Inorganic & Nuclear
Nethmi W. Hewage, Gayatri Viswanathan, Philip Yox, Kui Wu, Kirill Kovnir, Georgiy Akopov
Summary: Non-centrosymmetric semiconductors have significant nonlinear optical properties, and a careful balance of SHG, LDT, and phase-matchability is required for practical applications. This study developed a synthetic method to produce solid solution and high-entropy sulfides containing up to 9 elements, and explored their crystal structure and NLO properties. The findings demonstrate the potential of these materials for enhanced SHG and improved LDT compared to standard materials.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Nethmi W. Hewage, Gayatri Viswanathan, Philip Yox, Kui Wu, Kirill Kovnir, Georgiy Akopov
Summary: Non-centrosymmetric semiconductors exhibit important nonlinear optical properties. We developed a method to synthesize solid solutions and high-entropy sulfides, and studied their crystal structure and optical properties. The results show that most of these materials have good phase matchability, with the high-entropy alloy containing Cu showing higher SHG signal enhancement and LDT value.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Physics, Condensed Matter
Simeon J. Gilbert, Mingxing Li, Jia-Shiang Chen, Hemian Yi, Alexey Lipatov, Jose Avila, Alexander Sinitskii, Maria C. Asensio, Peter A. Dowben, Andrew J. Yost
Summary: The presence of in-plane chiral effects and spin-orbit coupling in a TiS3(001) field-effect phototransistor is confirmed through changes in the photocurrent caused by left versus right circularly polarized light. NanoARPES measurements indicate that the direction of the photocurrent is protected by strong spin-orbit coupling and the anisotropy of the band structure. Dark electronic transport measurements show that TiS3 is n-type with an electron mobility ranging from 1-6 cm(2)V(-1)s(-1). I-V measurements under laser illumination demonstrate that the photocurrent exhibits bias directionality dependence similar to bipolar spin diode behavior. The presence of spin-orbit coupling in TiS3, a material without heavy elements, is attributed to the loss of inversion symmetry at the TiS3(001) surface.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Engineering, Electrical & Electronic
S. Aydin
Summary: In this study, the effects of Ho-doping rate on the electronic and optical properties of ZnO films were analyzed using First Principles calculations. The band structure, optical properties, and density of states of different Ho-doped ZnO samples were calculated and compared. The results showed that the band gap first decreased and then increased with increasing Ho content, and the optical properties of Ho-doped ZnO exhibited blue shift and red shifts in various characterizations. The calculations confirmed that Ho-doping could heal ZnO and were consistent with experimental results.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Optics
Hamza Belkhanchi, Younes Ziat, Maryama Hammi, Charaf Laghlimi, Abdelaziz Moutcine, Anas Benyounes, Fouzia Kzaiber
Summary: The study focused on obtaining N-CNT/TiO2 thin films by sol-gel method, characterized by XRD, AFM, and SEM analysis, indicating that 300 degrees C is the optimal annealing temperature for achieving high photoactive performance.
Article
Materials Science, Multidisciplinary
Oleksandr Stroyuk, Oleksandra Raievska, Anastasia Barabash, Jens Hauch, Christoph J. Brabec
Summary: Stable double Cs2AgxNa1-xFeyIn1-yCl6 (CANFIC) microcrystalline perovskites were produced in air-open conditions. In(iii) effectively controlled the precursor interaction to form single-phase solid-solution CANFIC perovskite microcrystals even with a low concentration (1%). CANFIC perovskites exhibited sensitivity in the visible range, with the lowest bandgap of 1.95 eV observed for y = 0.99. The combination of open-environment synthesis conditions, precise compositional control, non-toxic constituents, stability, and visible light absorbance make CANFIC perovskites highly promising for photovoltaic and photochemical applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Electrical & Electronic
Feng-Xian Jiang, Gui-Zhi Zhang, Li-Fei Ji, Ling-Mei Zhao, Xiao-Hong Xu
Summary: ZnO films co-doped with Cr and N were successfully fabricated and characterized in terms of their structure and optical properties. It was found that the electrical and optical characteristics of the films can be tuned by doping with Cr and N, but excessive Cr doping degrades the crystal quality of the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xue Meng, Jinxiang Deng, Ruidong Li, Aleksei V. Almaev, Xiaolei Yang, Qing Zhang, Juxin Lao, Jiahui Ren, Kun Tian
Summary: This paper successfully prepares (BixGa1-x)(2)O-3 alloy semiconductor thin films by introducing bismuth element through radio frequency co-sputtering and achieves precise tuning of their band gap. The structure modification significantly affects the transmittance of the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Applied
Zhenzhen Li, Mehmet Baskurt, Hasan Sahin, Shiwu Gao, Jun Kang
Summary: Exploring gate insulator materials and defect properties in 2D transistors is important for device performance optimization. In this study, the properties of intrinsic vacancies in CaF2 single layer and its heterostructures with MoS2 were investigated. VF is found to be dominant in CaF2 and the band offset between CaF2 and MoS2 is determined to be type-I, leading to transfer of defect states from CaF2 to MoS2.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Physics, Applied
Jun Kang, Jingbo Li, Su-Huai Wei
Summary: Lead halide perovskites are promising materials for photovoltaic and optoelectronic applications, and the understanding of intrinsic point defects in these materials plays a crucial role in optimizing device performance. Advanced theoretical modeling has provided valuable insights into the defect physics and control in perovskites, offering atomic-scale understanding for further research and engineering strategies.
APPLIED PHYSICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Xingang Wang, Tao Xiong, Kai Zhao, Ziqi Zhou, Kaiyao Xin, Hui-Xiong Deng, Jun Kang, Juehan Yang, Yue-Yang Liu, Zhongming Wei
Summary: By designing and synthesizing PdPS, a 2D photodetector based on multichannel transition achieves wide spectral response from solar-blind ultraviolet to near-infrared, with impressive optoelectronic properties. Additionally, PdPS shows good performance in polarization detection at 808 nm and can achieve polarimetric imaging and hidden-target detection through active detection.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Y. O. Yayak, Y. Sozen, F. Tan, D. Gungen, Q. Gao, J. Kang, M. Yagmurcukardes, H. Sahin
Summary: The study shows that single-layer Ge3N4 has a dynamically stable buckled structure with large hexagonal holes, distinct vibrational features, and an indirect band gap semiconductor nature. It can also form type-II vertical heterostructures with various 2D materials and exhibit changes in energy band gap under applied external strain.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jiao An, Jun Kang
Summary: This study demonstrates the creation of multiple flat bands in carbon allotropes using twisted bilayer gamma-graphyne (TBGY) without the need for a specified magic angle. It also proposes a method to tune the width and extent of localization of flat bands through an energy mismatch between the layers of TBGY. This could allow for the study of correlation physics and quantum phase transitions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Condensed Matter
Jing Huang, Jun Kang
Summary: Semiconducting graphyne/graphene heterostructure shows excellent electronic properties, suitable for 2D FETs. N-type Ohmic contact with zero Schottky barrier height can be achieved through charge transfer and efficient electron tunneling. The Schottky barrier height can be controlled by applying external electric fields or doping, allowing for contact type transition.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Xingdan Sun, Shihao Zhang, Zhiyong Liu, Honglei Zhu, Jinqiang Huang, Kai Yuan, Zhenhua Wang, Kenji Watanabe, Takashi Taniguchi, Xiaoxi Li, Mengjian Zhu, Jinhai Mao, Teng Yang, Jun Kang, Jianpeng Liu, Yu Ye, Zheng Vitto Han, Zhidong Zhang
Summary: The formation of interfacial moire superlattices in van der Waals vertical assemblies reconstructs crystal symmetry and provides opportunities for investigating exotic quantum states. The alignment of graphene monolayer to both top and bottom encapsulating hexagonal boron nitride leads to observed conductivity minima and correlated insulating states in a weak-interaction regime. The alignment of three 2D nanosheets leads to the formation of super-moire atomic lattices, influencing the electronic properties of van der Waals structures.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Pan Zeng, Cheng Yuan, Jiao An, Xiaofei Yang, Chen Cheng, Tianran Yan, Genlin Liu, Ting-Shan Chan, Jun Kang, Liang Zhang, Xueliang Sun
Summary: The study proposes a strategy using reactive Li2S and bidirectional Fe3C electrocatalyst to achieve fast and continuous conversion of sulfur species, enhancing the performance of Li-S batteries. Fe3C plays a role in both reduction and oxidation processes, maintaining high catalytic activity and enabling stable operation of Li-S batteries over a wide temperature range.
ENERGY STORAGE MATERIALS
(2022)
Review
Physics, Multidisciplinary
Jun Kang, Xie Zhang, Su-Huai Wei
Summary: This article introduces the advances in ab initio density functional theory (DFT) calculations for energy materials design. It discusses the state-of-the-art DFT methods for simulating key properties of energy materials and showcases examples of new materials discovered for various energy applications. The challenges and future research directions in computational design of energy materials are also highlighted.
Article
Chemistry, Physical
Jun Kang, Jing Huang
Summary: This work investigates the defect and doping properties of monolayer PdSe2 using first-principles calculations. It is found that the dominant defects in monolayer PdSe2 are adatoms, followed by antisites and vacancies. The intrinsic defects have deep charge transition levels, and screening by the substrate has a weak effect on shallowing the defect levels. The unintentional doping concentration in monolayer PdSe2 is expected to be very low. However, good doping behaviors can be achieved through a modulation doping approach by incorporating dopants into an encapsulation CaF2 layer. K and Al dopings in the CaF2 layer can introduce holes and electrons in the PdSe2 layer, respectively, leading to good transport properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Yaning Wang, Xiang Gao, Kaining Yang, Pingfan Gu, Xin Lu, Shihao Zhang, Yuchen Gao, Naijie Ren, Baojuan Dong, Yuhang Jiang, Kenji Watanabe, Takashi Taniguchi, Jun Kang, Wenkai Lou, Jinhai Mao, Jianpeng Liu, Yu Ye, Zheng Han, Kai Chang, Jing Zhang, Zhidong Zhang
Summary: Interfacing graphene with an antiferromagnetic insulator CrOCl enables the observation of strong interfacial coupling. Using dual gates, we demonstrate an unusual quantum Hall effect in graphene samples in contact with CrOCl, leading to the development of two distinct quantum Hall phases.
NATURE NANOTECHNOLOGY
(2022)
Article
Physics, Applied
Jun Kang, Lin -Wang Wang
Summary: Accurate simulations of shallow impurities and their complexes are achieved by using a potential-patching method combined with a hybrid-functional correction. The combination of these methods allows for the calculation of large supercells and results in good agreement with experimental data.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Physical
Qiang Gao, Jun Kang
Summary: In this study, the hot carrier relaxation in lead halide perovskite nanocrystals was investigated using non-adiabatic molecular dynamics based on first-principles calculations. The results revealed a strong electron-hole asymmetry in the relaxation processes and showed that the nanocrystal shape plays a role in the hot carrier relaxation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Qiang Gao, Hasan Sahin, Jun Kang, Su-Huai Wei
Summary: This paper investigates the band-gap bowing effect and its possible origins in recently synthesized two-dimensional (2D) Cs2PbxSn1-xI2Cl2 alloys through first-principles calculations. The dominant mechanism causing the anomalous gap bowing is found to be the structural relaxation-induced wave-function localization, despite the negligible octahedral distortion and small lattice mismatch between the two end compounds. These results underscore the critical role of strong deformation potential and structural relaxation effect in the unusual band evolution of 2D Sn/Pb perovskite alloys.
Article
Materials Science, Multidisciplinary
Xiaoting Wang, Fang Zhong, Jun Kang, Can Liu, Ming Lei, Longfei Pan, Hailu Wang, Fang Wang, Ziqi Zhou, Yu Cui, Kaihui Liu, Jianlu Wang, Guozhen Shen, Chongxin Shan, Jingbo Li, Weida Hu, Zhongming Wei
Summary: The study demonstrates the utilization of a two-dimensional alpha-GeSe semiconductor to realize a polarizer-free polarization-sensitive visible/near-infrared photodetector/imager. The device exhibits impressive performances and unique polarization sensitivity. The proposed imager has the ability to sense dual-band polarization signals in the scene without polarizers, paving the way for advanced applications.
SCIENCE CHINA-MATERIALS
(2021)
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)
