Article
Chemistry, Multidisciplinary
Jae Won Lee, Sungwoo Jung, Jinhyeong Jo, Gi Hyeon Han, Dong-Min Lee, Jiyeon Oh, Hee Jae Hwang, Dukhyun Choi, Sang-Woo Kim, Jun Hee Lee, Changduk Yang, Jeong Min Baik
Summary: In this paper, a new dielectric material, a C-60-containing block polyimide (PI-b-C-60), was reported for use in a non-contact mode triboelectric nanogenerator (TENG). The TENG based on PI-b-C-60 achieved high output power and reliable operation, outperforming perfluoroalkoxy alkane film-based TENGs. The excellent charge-retention characteristics of PI-b-C-60, induced by the most negative electrostatic potential of C-60 within the backbone, were confirmed by surface potential measurements. Additionally, two non-contact mode applications, a keyless electronic door lock system and a speed sensor with a tone wheel for a car, were successfully developed during the study.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Physical
Recep Isci, Melis Unal, Gizem Kucukcakir, Naime A. Gurbuz, Sultan F. Gorkem, Turan Ozturk
Summary: A wide range of new fluorescent molecules with different substituents were synthesized and exhibited excellent fluorescence properties, including high quantum yields and long lifetimes.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Organic
Xin-Rui Chen, Qian-Wen Zhang, Ge-Ge Tao, Jun Xuan, Hong-Ping Zhou, Yu-Peng Tian, Fei Li
Summary: The development of an efficient umpolung relay three-component regioselective coupling reaction allows for a cascade reaction of aromatic nucleophilic addition and electrophilic substitution, with high regioselectivity and broad substrate scope. This methodology exhibits excellent functional group tolerance on arenes, including bromo, ester, nitro, cyano, formyl, and N-H groups.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Usman Khan, Muhammad Khalid, Sumreen Asim, Momina, Riaz Hussain, Khalid Mahmood, Javed Iqbal, Muhammad Nadeem Akhtar, Amjad Hussain, Muhammad Imran, Ahmad Irfan, Akbar Ali, Muhammad Fayyaz ur Rehman, Yang Jiang, Changrui Lu
Summary: This study focused on designing D-pi-A based dyes with a structure that enhances nonlinear optical properties. Through computational analysis, the impact of structural variations on NLO response was investigated. The newly designed dyes demonstrated superior performance in absorption, energy band gap, charge transfer, and first hyperpolarizability values.
FRONTIERS IN MATERIALS
(2021)
Article
Chemistry, Physical
Na Zhang, Ning Li, Li Wang, Mengtao Sun, Jingang Wang
Summary: This article investigates the optical properties of the two-dimensional material NbOCl2, which exhibits high second-order nonlinear coefficients and weak electronic coupling between layers, making it a suitable quantum light source material. The study reveals that the total density of states, photoelectronic energy spectrum, and absorption spectrum of NbOCl2 are influenced by the size effect. Charge transfer occurs around the Nb atom of NbOCl2 and the transition dipole moment density changes periodically. The two-photon absorption spectrum is dominated by a one-step transition.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Materials Science, Multidisciplinary
A. Hiti, F. Nekkach, A. Boutahar, R. Moubah, H. Lemziouka, E. K. Hlil
Summary: This report investigates the impact of Mn doping on the structural, linear, and nonlinear optical properties of Gd2-xMnxO3 nanoparticles. The Gd2-xMnxO3 powders were prepared using the sol-gel process. X-ray diffraction analysis revealed that Mn3+ doping resulted in a slight decrease in lattice parameter and an increase in crystallite size. UV-visible measurements showed a decrease in the direct optical band gap and an increase in Urbach energy with increasing Mn content. Additionally, the insertion of Mn led to significant enhancements in various optical parameters. The presence of manganese also enhanced the linear and nonlinear optical susceptibilities and refractive index. These findings demonstrate the potential applications of Gd2-xMnxO3 nanoparticles in optical devices.
Article
Materials Science, Multidisciplinary
B. Moses Abraham
Summary: This study systematically investigated the gas sensing mechanism of metal-doped fullerene C-60 towards cyanogen halide gases, revealing high sensitivity and potential capability. The electronic structure and optical absorption spectra showed significant variations after the adsorption of X-CN gases, indicating the reliability of metal-doped C-60 as a gas sensor. Furthermore, the reduced band gaps of metal-doped C-60/X-CN complexes suggest a strong signal for detecting cyanogen halide gases, highlighting the remarkable sensitivity of fullerene C-60 as a potential wearable chemical sensor for future applications.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
S. Delice, M. Isik, N. M. Gasanly
Summary: This manuscript studied the linear and nonlinear optical properties of PbWO4 single crystals, revealing aspects such as crystal structure, optical band gap, refractive index, and more. Nonlinear susceptibilities and refractive index for the crystal were also computed.
Article
Chemistry, Applied
Wanlu Li, Chunying He, Yongli Dong, Weina Song, Yanli Zu
Summary: Zinc phthalocyanine was used to functionalize sulfur vacancies of MoS2, leading to the synthesis of MoS2/ZnPc composite. This composite showed higher third order nonlinear absorption coefficients and lower limiting thresholds compared to individual MoS2 or ZnPc, due to a combination of various nonlinear absorption mechanisms.
Article
Chemistry, Physical
Praful S. Patil, Nagaiyan Sekar
Summary: This study theoretically investigates the nonlinear optical properties of natural hydroxyanthraquinones using the DFT method, and the results indicate that these compounds exhibit appreciable NLO properties. The computational results are consistent with the reported experimental results.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Materials Science, Multidisciplinary
Jie Fan, Panpan Li, Zhijian Wang, Jiping Yang
Summary: In this study, the temperature dependence of epoxy-based nanocomposites was comprehensively investigated using molecular dynamics simulation and experimental methods. The results showed that as temperature decreased, the molecular mobility of the nanocomposites decreased, the interfacial interaction energy increased, and the Young's modulus increased. The experimental measurements of tensile properties at different temperatures agreed well with the simulation results. Furthermore, the toughening mechanisms of the nanocomposites at different temperatures were discussed.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Vijay Gulumkar, Ville Tahtinen, Aliaa Ali, Jani Rahkila, Juan Jose Valle-Delgado, Antti Aarela, Monika Osterberg, Marjo Yliperttula, Pasi Virta
Summary: The Bingel cyclopropanation reaction was used to produce a hexakis-functionalized C-60 core, which can be selectively functionalized by two pericyclic click reactions, allowing control over the assembly of heteroantennary bioconjugates with appropriate ligands.
Article
Spectroscopy
Aneta Ciupa-Litwa, Jan Albert Zienkiewicz, Mariusz Stefanski, Maciej Ptak, Andrzej Majchrowski, Maciej Chrunik
Summary: Single crystals of a non-centrosymmetric and polar Cs2Bi2O(Ge2O7) compound were grown from melt, showing potential as SRS-active nonlinear optical material for laser-frequency converters. Optical studies revealed intense absorption bands suitable for specific transitions in Bi3+ ions.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Mahesh M. Hivrekar, G. Jagannath, A. G. Pramod, Dalal Abdullah Aloraini, Aljawhara H. Almuqrin, M. Sayyed, K. Keshavamurthy, Vinod Hegde, K. N. Sathish, U. Mahaboob Pasha, S. Venugopal Rao, Sabina Yasmin, K. M. Jadhav
Summary: The efficacy of tri-valent samarium ions concentration on the optical and third-order nonlinear optical properties of multicomponent cadmium alkali borate-based glasses was investigated in this study. The results showed that glasses with 2 mol% of Sm2O3 exhibited significantly improved nonlinear optical properties, making them suitable for constructing devices in the near-infrared region.
Article
Multidisciplinary Sciences
Nafeesah Yaqub, W. A. Farooq, M. S. AlSalhi
Summary: This research investigates the linear and nonlinear optical properties of linear low-density polyethylene (LLDPE) composites with anatase phase of titanium dioxide nanoparticles at different weight percentages. Thin films of LLDPE/anatase nanocomposites were synthesized using the solvent casting method and characterized using XRD and FESEM. The addition of titanium dioxide resulted in the formation of wrinkles on the thin film surface. Linear optical and electrical parameters were determined for different weight percentages of nanoparticles, and the nonlinear optical properties were explored using the Z-scan technique. The results demonstrate the suitability of the thin films for optical devices that utilize the optical limiting properties of materials.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Kyriakos Mouratis, Ioan Valentin Tudose, Cosmin Romanitan, Cristina Pachiu, Marian Popescu, Georgios Simistiras, Stelios Couris, Mirela Petruta Suchea, Emmanuel Koudoumas
Summary: In this study, the effect of precursor concentration and solution quantity on the properties of WO3 films was investigated. The films exhibited good electrochromic activity and durability of charge exchange. The compositional and structural characteristics of the films were analyzed, suggesting that these features may contribute to the improved durability.
Article
Materials Science, Multidisciplinary
Apostolos Koutsioukis, Georgios Florakis, Nikolaos Samartzis, Spyros N. N. Yannopoulos, Michalis Stavrou, Dionysia Theodoropoulou, Nikolaos Chazapis, Stelios Couris, Argiris Kolokithas-Ntoukas, Georgios Asimakopoulos, Dimitrios P. P. Gournis, Vasileios Tzitzios, Elias Sakellis, Stylianos F. F. Tombros, Sotirios Kokkalas, Vasilios Georgakilas
Summary: This article describes a green procedure for the liquid exfoliation of natural hematite and magnetite, resulting in the formation of stable dispersions of hematene and magnetene, respectively. The ultrathin exfoliated nanoplatelets show promising efficiency in optical limiting experiments, making them highly attractive for opto-electronics and photonics applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Antonia Kagkoura, Christina Stangel, Raul Arenal, Nikos Tagmatarchis
Summary: Functionalized molybdenum diselenide (MoSe2) and tungsten diselenide (WSe2) were synthesized via metal-ligand coordination and subsequent covalent grafting of a cobalt-porphyrin. The resulting hybrid materials exhibited enhanced activity for electrocatalytic hydrogen evolution reaction compared to pristine MoSe2 and WSe2. The modification route provides a versatile functionalization procedure for other transition metal dichalcogenides and opens new pathways for functional nanomaterials in electrocatalysis.
Article
Chemistry, Applied
Eleni Nanou, Dimitrios Stefas, Stelios Couris
Summary: In this study, the inorganic content of different milk samples was investigated using Laser Induced Breakdown Spectroscopy (LIBS) technique. The optimal experimental conditions for measuring low concentration inorganic elements were determined by using infrared (1064 nm) and visible (532 nm) laser excitation conditions. Major (Ca, Na, Mg and K) and minor minerals (P, Zn, Cu and Si) were detected and identified through their spectral features. The LIBS results were in perfect correlation with the results obtained from atomic absorption measurements, indicating the potential of LIBS technique for fast and in-situ qualitative characterization of the inorganic content in milk samples of different animal origin.
Article
Biochemistry & Molecular Biology
Eleni Zygouri, Aristeidis Stathis, Stelios Couris, Vassilis Tangoulis
Summary: A nanocomposite based on silica-coated gold nanorods (AuNRs) and aminated silica-covered spin-crossover nanoparticles (SCO NPs) of iron(II) coordination polymer was prepared. The synthesis of SCO NPs was done by the reverse micelle method, while AuNRs were prepared using the seeded-growth method. The nonlinear optical properties of the AuNRs@SCO nanocomposite were studied using the Z-scan technique, revealing their dependence on the amount of SCO NPs grafted onto the AuNRs. However, resonant excitation prevented the observation of SCO-induced NLO switching.
Editorial Material
Chemistry, Multidisciplinary
Oleksandr Loboda, Peter Strizhak, Robert W. W. Gora, Ctirad Cervinka
FRONTIERS IN CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Michalis Stavrou, Nikolaos Chazapis, Vasileios Arapakis, Vasilios Georgakilas, Stelios Couris
Summary: Hematene and magnetene nanoplatelets were synthesized from hematite and magnetite ores using a green synthesis method and dispersed in water. These non-vdW 2D materials showed strong saturable absorption and Kerr-type nonlinear refractive index, suggesting potential applications in photonics and optoelectronics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Michalis Stavrou, Nikolaos Chazapis, Vasilios Georgakilas, Stelios Couris
Summary: This study reports on the nonlinear optical response and optical limiting action of hematene and magnetene ultrathin non-vdW 2D nanoplatelets dispersed in water. The results show strong nonlinear absorption and refraction in both hematene and magnetene, surpassing those of traditional van der Waals materials. The outstanding optical limiting performance of these two materials makes them promising candidates for photonics and optoelectronic applications, such as optical limiters and optical switchers.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Aggelos Avramopoulos, Heribert Reis, Demeter Tzeli, Robert Zalesny, Manthos G. Papadopoulos
Summary: The first-, second-, and third-order molecular nonlinear optical properties of derivatives consisting of two dithienylethene (DTE) groups connected by various molecular linkers were studied using density functional theory (DFT). The properties can be controlled by DTE switches and light of appropriate frequency. It was found that the linker (NiBDT) exhibits a greater contrast in hyperpolarizabilities between the open-open and closed-closed isomers compared to naphthalene, due to its low-lying excited states. Additionally, the electronic coupling (V-DA) between the donor and acceptor fragments as well as the spectral overlap between their absorption and emission spectra were computed, revealing the influence of the linker on the communication between DTE groups and the potential for identification of molecular isomers.
Article
Food Science & Technology
Eleni Nanou, Nefeli Pliatsika, Dimitrios Stefas, Stelios Couris
Summary: The use of Laser Induced Breakdown Spectroscopy (LIBS) assisted by machine learning is proposed to identify the animal origin of milk. Spectra from raw liquid milk and lyophilized powdered samples were analyzed using LIBS and various machine learning algorithms. The results demonstrated high predictive accuracies for classifying milk samples based on animal origin, with values up to 92.8% and 95.5% using the entire LIBS spectra for liquid and powder milk samples, respectively. Using only five spectral lines related to milk's inorganic content, classification accuracies of up to 87.6% and 92.9% were achieved for liquid and powder milk samples, respectively. This study highlights the great potential of LIBS for discriminating milk samples based on animal origin.
Article
Chemistry, Multidisciplinary
Nikolaos Chazapis, Michalis Stavrou, Georgia Papaparaskeva, Alexander Bunge, Rodica Turcu, Theodora Krasia-Christoforou, Stelios Couris
Summary: This study focuses on the synthesis and characterization of iridium (Ir)-based nanohybrids with different chemical compositions. The nanohybrids, including PVP-IrO2, PVP-Ir/IrO2, and non-coated Ir/IrO2 nanoparticles, were synthesized using various methods and characterized through XPS and STEM. The results demonstrate that these nanohybrids exhibit exceptional nonlinear optical (NLO) response and optical limiting (OL) efficiency, making them potential competitors in photonic and optoelectronic applications. Moreover, the choice of synthetic method significantly influences the NLO properties of the nanohybrids, suggesting the possibility of tailor-made NLO properties for specific applications in photonics and optoelectronics.
Article
Chemistry, Inorganic & Nuclear
Anna Pintus, Cristian Pilloni, Gabriele Pippia, Enrico Podda, M. Carla Aragoni, Vito Lippolis, Panagiotis Aloukos, Dionysios Potamianos, Nikolaos Chazapis, Stelios Couris, George C. Anyfantis, Alexandra M. Z. Slawin, J. Derek Woollins, Massimiliano Arca
Summary: The third-order nonlinear optical (NLO) properties of platinum diimine-dithiolate complexes [Pt(N <<^>> N)(S <<^>> S)] were investigated using Z-scan measurements and DFT calculations. The results showed high second hyperpolarizability values up to 10(-29) esu, saturable absorption properties, and nonlinear refractive behaviour.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Michalis Stavrou, Amelie M. Muehlbach, Vasilios Arapakis, Elisabeth Gross, Tim Kratky, Sebastian Guenther, Bernhard Rieger, Stelios Couris
Summary: This study reports on the ultrafast saturable absorption (SA), optical limiting (OL), and nonlinear refractive response of hydride-terminated silicon nanosheets (SiNS-H) that are differently functionalized with styrene and tert-butyl methacrylate (tBuMA). The results show that the functionalized SiNSs exhibit greatly enhanced nonlinear optical (NLO) responses, with strong SA behavior under 400 nm laser excitation and highly efficient OL performance under 800 nm laser excitation. Additionally, the SiNS samples demonstrate strong NLO refraction comparable to that of bulk silicon, making them potential candidates in optoelectronic and photonic applications.
Article
Chemistry, Multidisciplinary
Michalis Stavrou, Amelie M. Muehlbach, Vasilios Arapakis, Elisabeth Gross, Tim Kratky, Sebastian Guenther, Bernhard Rieger, Stelios Couris
Summary: This study investigates the nonlinear optical response of functionalized silicon nanosheets and finds that samples functionalized with styrene and tBuMA exhibit strong saturable absorption and efficient optical limiting performance. These samples show potential applications in optical switching.
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)
