Article
Physics, Condensed Matter
Hardik Gohil, Bhargav Rajyaguru, Himanshu Dadhich, Keval Gadani, V. G. Shrimali, P. P. Bardapurkar, R. J. Choudhary, D. M. Phase, N. A. Shah, P. S. Solanki
Summary: In this study, a LMO/LCMO/LAO structure was prepared using a low cost sol-gel based CSD method. The resistive nature of the LMO/LCMO interface was investigated under different experimental conditions. The possible existence of magnetoresistance, electroresistance, and anisotropic magnetoresistance effects across the same interface was identified. The Zener double exchange polynomial law was fitted theoretically to understand the spin fluctuations across the LMO/LCMO interface.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Himanshu Dadhich, Bhargav Rajyaguru, Keval Gadani, Hardika Goswami, V. R. Rathod, V. G. Shrimali, S. Mukherjee, K. Asokan, N. A. Shah, P. S. Solanki
Summary: This paper discusses the temperature dependence of resistive switching (RS) behavior across the chemically grown LaMnO3/La0.7Ca0.3MnO3 (LMO/LCMO) interface through various theoretical approaches and mechanisms. The temperature-dependent RS behavior of the LMO/LCMO interface demonstrates the impactful switching between high resistance state (HRS) and low resistance state (LRS) under reverse bias mode, facilitated by the active role of the depletion region. Trapping-detrapping processes assist charge conduction and are identified as the source of the RS nature of the LMO/LCMO interface. The thermionic emission model and space charge limited conduction (SCLC) mechanism are employed to understand the charge conduction and transport across the LMO/LCMO interface. The stability, reliability, reproducibility, non-volatile nature, and applicability of the LMO/LCMO interface are verified through investigation of the Ag/LMO/LCMO/Ag structure under different external parameters.
CURRENT APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Feng Wang, Wei Fu, Chengming Jiang, Junxiao Li, Jijie Huang
Summary: This study deposited (LaFeO3)(x):(La0.7Ca0.3MnO3)(1-x) composite thin films via pulsed laser deposition (PLD) and investigated the exchange bias effect. LaFeO3 is an antiferromagnet while La0.7Ca0.3MnO3 is a ferromagnet, resulting in exchange bias interfacial coupling at the FM/AFM interface. The composition variation in the composite system could tune the exchange bias field (H-EB).
Article
Materials Science, Multidisciplinary
S. Saha, A. K. Das, S. Sinha, R. Karmakar, R. Hatada, W. Ensinger, S. Flege, K. Baba, A. K. Meikap
Summary: The effect of molybdenum doping and acetylene gas flow rate on the electrical properties of diamond like carbon films is reported. Molybdenum doping increased the dielectric constant and the change in flow rate affected the bonding type in the film. The ac conductivity of the films increased with frequency and showed two plateau regions with 29% molybdenum doping. The experimental data indicated the occurrence of both ionic conduction and polaron hopping.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Physics, Applied
Jikui Jia, Yunyun Liu, Chuanxin Huang, Meng Wang, Junbao Wang, Bin Zhang, Yanbin Zheng, Zhongjun Tian, Yiying Lv, Ju Gao
Summary: Pr0.7Sr0.3MnO3 thin films were epitaxially grown on SrTiO3 and LaAlO3 substrates using pulse laser deposition. X-ray diffraction analysis showed that the films had good crystallinity and epitaxy. The transport behavior and phase transition near Curie temperature in these films were found to be influenced by oxygen deficiency and in-plane strain.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Weiyuan Wang, Jiyu Fan, Huan Zheng, Jing Wang, Hao Liu, Caixia Wang, Chunlan Ma, Langsheng Ling, Jingtao Xu, Hao Yang
Summary: The study focused on the structural, surface morphology, magnetic, and resistivity data of perovskite LaMnO3 epitaxial thin films. The films exhibited paramagnetic behavior and insulating electron transport in the studied temperature range, with charge carriers following different small polaronic hopping mechanisms in high and low temperature regions. These findings provide new insights for exploring abnormal ferromagnetism in LaMnO3 multilayer thin films.
MODERN PHYSICS LETTERS B
(2021)
Article
Physics, Multidisciplinary
Ming Chu, Shao-Bo Liu, An-Ran Yu, Hao-Miao Yu, Jia-Jun Qin, Rui-Chen Yi, Yuan Pei, Chun-Qin Zhu, Guang-Rui Zhu, Qi-Zeng, Xiao-Yuan Hou
Summary: A three-element equivalent circuit model is proposed to address the invalidation of commonly employed series model and parallel model in C-V characterization of organic thin films with significant current injection. The real capacitance expression considering current injection is theoretically derived and validated through a simulating circuit. This work demonstrates the necessity to consider current injection in C-V measurement and provides a strategy for accurate C-V characterization experimentally.
Article
Nanoscience & Nanotechnology
Eunsoo Cho, Abinash Kumar, Shuai Ning, James M. LeBeau, Caroline A. . Ross
Summary: SrCo1-xFexO3-delta films grown using pulsed laser deposition on SrTiO3 substrates can form either single-phase films or two-phase self-assembled nanocomposite films depending on the oxygen partial pressure. High oxygen partial pressure promotes phase separation of SCFO into a nanocomposite material composed of Co oxide pillars embedded in a Fe-rich SCFO matrix. Ionic liquid gating of the nanocomposites oxidizes the material and induces magnetic properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yuanyuan Liu, Hongyun Li, Changkun Cai, Shuting Li, Jinlong Cui, Shengli An
Summary: In order to improve the performance of the Ce0.8Gd0.2O2-delta (GDC) electrolyte in a solid oxide fuel cell, a GDC/ScSZ double layer was used to block the electronic conduction due to Ce3+/Ce4+ transitions. The results showed that the GDC/ScSZ-GDC electrolyte had lower ionic conductivity and higher electronic conductivity compared to GDC. The use of ScSZ as a barrier layer effectively reduced electron transfer and improved the performance of the fuel cell.
Article
Physics, Condensed Matter
O. Polat, M. Coskun, H. Efeoglu, M. Caglar, F. M. Coskun, Y. Caglar, A. Turut
Summary: The study of the current-voltage characteristics of perovskite ytterbium ferrite and the determination of the work function and ideality factor of the heterojunction revealed the electrical properties of this new material. The temperature-independent slope of the I-V curve indicates the presence of field emission current mechanism in the device, while a tunneling transmission coefficient value of 26.67 was obtained at the interface of ferroelectric YbFeO3-delta layer and p-Si.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Applied
Miela J. Gross, Walid A. Misba, Kensuke Hayashi, Dhritiman Bhattacharya, Daniel B. Gopman, Jayasimha Atulasimha, Caroline A. Ross
Summary: Voltage-tuning of magnetic anisotropy is demonstrated in this study, showing the mechanism behind this phenomenon using a piezoelectric substrate.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Tsuyoshi Ohnishi, Kazutaka Mitsuishi, Kazunori Takada
Summary: LiCoO2 is commonly used as the cathode material in lithium-ion batteries due to its high theoretical capacity, but degradation occurs with high capacity cycling. This study has shed light on the relationship between phase transitions and electrode properties, aiding the improvement of battery performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Alfredo Blazquez Martinez, Nicolas Godard, Naveen Aruchamy, Cosme Milesi-Brault, Oana Condurache, Andreja Bencan, Sebastjan Glinsek, Torsten Granzow
Summary: In this study, polycrystalline Mn and Ti co-doped BiFeO3 thin films were fabricated on platinized silicon substrates by a solution deposition method, with PbTiO3 nanocrystals used as a seed layer to induce a preferential (100) pseudocubic orientation. The introduction of a PbTiO3 seed layer significantly reduced the leakage current and resulted in excellent room-temperature ferroelectric properties in the thin films.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Chen Yufeng, Geming Wang, Sun Zhengfeng, Wang Shenggao, Mao Yangwu, Deng Quanrong, Yang Jingjing
Summary: This work focuses on the fabrication and characterization of LaMnO3+delta thin films, exploring the evolution of magnetic characteristics and the effects under different deposition conditions. The interactions between ferromagnetism and antiferromagnetism in the films were discovered and analyzed.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Ceramics
Xu Jiang, Jie Sun, Xiaojie Chai, Yifan Chen, Wei Zhang, Jun Jiang, Anquan Jiang
Summary: The study found that the wall current varies with the angle between the applied electric field and the initial polarization, and that the oxygen vacancy concentration can be controlled through thermal annealing, affecting the magnitude of the domain wall current.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Kriti, Puneet Kaur, Simranpreet Kaur, Deepawali Arora, Surbhi Chalotra, Pargam Vashishtha, Harjeet Kaur, Govind Gupta, Asokan Kandasami, D. P. Singh
Summary: The WO3:Sm compounds synthesized via solid-state reaction method were characterized for their structural, optical, and magnetic properties. The results showed monoclinic phase structure, densely packed particles, band gap broadening, violet-blue emissions, and room-temperature ferromagnetism, making them suitable for white LEDs.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Chandra Prakash Verma, K. Asokan, Pawan K. Kanaujia, Mohammad Adnan, D. Kanjilal, G. Vijaya Prakash
Summary: In this study, low-energy Ar+ ion beam irradiation on PSi microcavities resulted in a red-shift in the reflectance spectra of resonant cavities and modification of crystalline silicon structure. Experimental findings were in agreement with simulations, providing evidence for tuning optical properties and photon confinement within the microcavity.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Panneerselvam Kurinjinathan, Pandiyaraj Kanagavalli, Pei-Rong Li, Murugan Veerapandian, Han-Wei Chang, Ping-Hung Yeh, K. Asokan, K. Thanigai Arul, Chung-Li Dong
Summary: Tin (Sn2+) ions incorporated hydroxyapatite (HAp) nanospheres were prepared by wet chemical, leading to enhanced specific capacitance and excellent cyclic stability for electrochemical energy storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Razia Nongjai, Rubiya Samad, V. R. Singh, V. K. Verma, Asokan Kandasami
Summary: The study investigated the effect of N ion implantation on Fe3O4 thin films, showing improvements in magnetic properties and electronic structure after ion implantation. The increase in carrier concentration and decrease in resistivity were also observed, contributing to the enhanced magnetic properties of the implanted thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Keval Gadani, K. N. Rathod, Davit Dhruv, V. G. Shrimali, Bhargav Rajyaguru, Joyce Joseph, A. D. Joshi, D. D. Pandya, K. Asokan, P. S. Solanki, N. A. Shah
Summary: This study investigates the structural, microstructural, resistive switching characteristics, and charge conduction mechanisms of Y0.95Ca0.05MnO3 (YCMO) manganite films grown on Nb:SrTiO3 substrates irradiated with 100 MeV O(+7) swift heavy ions. The observed resistive switching behavior is attributed to changes in the depletion region, movement of oxygen vacancies, and tunneling processes at the interface barriers between YCMO and SNTO. The films exhibit endurance and retention behaviors, indicating their reproducibility, dynamic stability, and reliability as non-volatile memory devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Ceramics
Alpa Zankat, Keval Gadani, Bhargav Rajyaguru, V. G. Shrimali, Joyce Joseph, Harshida Makwana, R. K. Trivedi, P. S. Solanki, N. A. Shah, D. D. Pandya
Summary: Semiconducting oxide nanocomposites of ZnO/SnO2 with different weight ratios were prepared and characterized. Structural analysis showed the crystal structures of SnO2 and ZnO, while elemental analysis revealed Sn deficiency in one sample. Electrical properties, such as dielectric behavior and ac conductivity, were discussed in detail, highlighting the differences among the studied nanocomposites.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Pratik Lakhani, Minal Unadkat, Pankaj Solanki, Jaysukh H. Markana, Mukesh Ranjan, Bharat Kataria
Summary: In this study, the structural, electrical transport, and UV-visible properties of polycrystalline La0.7Ca0.3-xKxMnO3 ceramic samples were investigated. The results show that the substitution of Ca2+ by K1+ has a non-monotonic effect on the electrical resistivity and metal-insulator transition temperature. The optical band gap also changes with the partial replacement of Ca2+ with K1+. The study highlights the influence of impurities on the structural, electrical transport, and UV-visible response of the ceramic samples.
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2022)
Article
Physics, Condensed Matter
Alpa Zankat, Keval Gadani, Bhargav Rajyaguru, Khushal Sagapariya, Vivek Pachchigar, M. Ranjan, K. Asokan, P. S. Solanki, N. A. Shah, D. D. Pandya
Summary: This study reports the current-voltage characteristics of La0.5Gd0.2Ca0.3MnO3 (LGCMO) manganite thin films grown by pulsed laser deposition on Nb:SrTiO3 substrates, irradiated with swift heavy ions. Measurements such as X-ray diffraction and atomic force microscopy were performed to understand structural behaviors, while current-voltage data was collected to analyze lattice strain, grain size, and grain boundary density effects. Additionally, the impact of annealing on ZnO/LGCMO interfaces was studied, discussing modifications induced by annihilation, structural strain, and surface morphology.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Physics, Fluids & Plasmas
K. A. Jadeja, J. Ghosh, Nandini Yadava, K. M. Patel, Kiran Patel, R. L. Tanna, R. Manchanda, M. B. Chowdhuri, J. Raval, U. C. Nagora, B. G. Arambhadiya, Tanmay Macwan, K. Singh, S. Dolui, Minsha Shah, Sharvil Patel, N. Ramaiya, Kajal Shah, B. K. Shukla, Suman Aich, Rohit Kumar, V. K. Panchal, Manoj Kumar, P. K. Atrey, S. K. Pathak, Rachana Rajpal, Kumudni Assudani, M. Gopalakrishna, Devilal Kumawat, M. N. Makwana, K. S. Shah, Shivam Gupta, C. N. Gupta, V Balakrishnan, P. K. Chattopadhyay, B. R. Kataria
Summary: This study discusses two different lithium wall conditioning techniques employed in the ADITYA-Upgrade tokamak, with evaporated lithium performing better than the lithium rod case and providing sustained enhancements in plasma parameters. The lithium coating obtained through H-GDC technology proves to be more durable compared to traditional non-H-GDC techniques.
Article
Materials Science, Multidisciplinary
Anchal Sharma, Puneet Negi, Ruhit Jyoti Konwar, Hemaunt Kumar, Yogita Verma, Shailja, Prakash Chandra Sati, Bhargav Rajyaguru, Himanshu Dadhich, N. A. Shah, P. S. Solanki
Summary: Pure and doped derivatives of TiO2 with nitrogen and cobalt as dopants were synthesized using auto-combustion sol-gel technique. The doping effects on the structural, optical, and electrical properties were investigated. The results showed that doping can tune the band gap of TiO2, making it suitable for photocatalytic and photovoltaic applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Manjula Kandoliya, Bhargav Rajyaguru, Keval Gadani, Naimisha Vaghela, Himanshu Dadhich, D. Venkateshwarlu, A. D. Joshi, N. A. Shah, P. S. Solanki
Summary: Control over the different electronic states in mixed valent manganites advances the development of oxide based electronic devices. Carrier density plays a key role in controlling the electronic ground states of manganites without creating impurities, unlike chemical doping processes. The fabrication of a LaMnO3-delta / La0.7Ca0.3MnO3 / LaAlO3 (LMO / LCMO / LAO) manganite based heterostructure was achieved using a low-cost chemical solution deposition (CSD) method, with the structural quality and epitaxial nature verified through X-ray diffraction (XRD) measurements.
SURFACES AND INTERFACES
(2022)
Article
Physics, Condensed Matter
Hardik Gohil, Bhargav Rajyaguru, Himanshu Dadhich, Keval Gadani, V. G. Shrimali, P. P. Bardapurkar, R. J. Choudhary, D. M. Phase, N. A. Shah, P. S. Solanki
Summary: In this study, a LMO/LCMO/LAO structure was prepared using a low cost sol-gel based CSD method. The resistive nature of the LMO/LCMO interface was investigated under different experimental conditions. The possible existence of magnetoresistance, electroresistance, and anisotropic magnetoresistance effects across the same interface was identified. The Zener double exchange polynomial law was fitted theoretically to understand the spin fluctuations across the LMO/LCMO interface.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Pankaj Solanki, Mayur Vala, Dhananjay Dhruv, Sandip V. Bhatt, Bharat Kataria
Summary: This study describes the synthesis and electrical transport properties of GdMnO3/Al-doped ZnO and GdMnO3/ZnO heterostructures grown by vacuum deposition. The structures of the samples are confirmed by XRD and the surface topography is analyzed using AFM. The electrical properties and resistive switching behavior are investigated through Hall measurements and current-voltage characteristics. Raman spectroscopy is used to study the vibrational modes of the MnO6 octahedra. The results provide insight into the conduction mechanisms and resistive switching behavior of these heterostructures.
SURFACES AND INTERFACES
(2022)
Article
Physics, Condensed Matter
Bhargav Rajyaguru, Keval Gadani, M. J. Keshvani, K. N. Rathod, A. D. Joshi, K. Asokan, R. J. Choudhary, D. M. Phase, N. A. Shah, P. S. Solanki
Summary: In this study, high quality LaMnO3/La0.7Ca0.3MnO3/LaAlO3 manganite structure was successfully prepared using a low cost chemical solution deposition method. Temperature dependent resistive switching behavior was investigated and appropriate charge carrier conduction mechanisms were identified.
MICRO AND NANOSTRUCTURES
(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)