Article
Chemistry, Physical
Quan Liu, Frank Wackenhut, Liangxuan Wang, Otto Hauler, Juan Carlos Roldao, Pierre-Michel Adam, Marc Brecht, Johannes Gierschner, Alfred J. Meixner
Summary: Tautomerization is a fundamental chemical reaction involving proton relocation, presenting a challenge in studying the optical properties of tautomeric species. Single-molecule experiments reveal the reorientation of the transition dipole moment during tautomerization in molecules such as hypericin. By combining image pattern flipping observations with time-dependent density functional theory calculations, this study identifies four tautomers and their conversion path in hypericin molecules.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Cheng Giuseppe Chen, Mauro Giustini, Marco D'Abramo, Andrea Amadei
Summary: In this paper, the dynamics of the emitting electronic excited state of aqueous indole were reconstructed, and its relaxation mechanism and kinetics were investigated with respect to the time-dependent fluorescence signal. Using recent results, the relaxation process in solution was modeled by transitions between two gas-phase singlet electronic states (L-1(a) and L-1(b)), which subsequently irreversibly relaxed to the gas-phase singlet dark state ((1)pi sigma*). A comparison with experimental data showed that the theoretical-computational model accurately reproduced all experimental observables.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Biochemical Research Methods
Jesse H. Lam, Kelsey J. TU, Jeonghun Kim, Sehwan Kim
Summary: We report the development of a handheld, smartphone-based spatial frequency domain imaging device. Through experiments with liquid phantoms and human subjects, the device can calculate optical properties and hemoglobin-based chromophores, laying the foundation for a mass-market device for dermatological and cosmetic applications.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Yu-Hui Liu, Shi-Bo Yu, Ya-Jing Peng, Chen-Wen Wang, Chaoyuan Zhu, Sheng-Hsien Lin
Summary: This study investigated the ESIPT reaction of two phenol-quinoline molecules using time-dependent density functional theory. The different carbocycle structures between the molecules were found to affect the reaction rate and barrier. Vibrational excitation played a key role in lowering the reaction barrier.
Article
Multidisciplinary Sciences
Chun Tang, Thijs Stuyver, Taige Lu, Junyang Liu, Yiling Ye, Tengyang Gao, Luchun Lin, Jueting Zheng, Wenqing Liu, Jia Shi, Sason Shaik, Haiping Xia, Wenjing Hong
Summary: By utilizing a strategy of redox control and electric field modulation, we successfully achieve single-molecule control of a keto-enol equilibrium at room temperature. Through the control of charge injection in the single-molecule junction, we can access charged potential energy surfaces with opposite thermodynamic driving forces, preferentially favoring the conducting enol form and significantly reducing the isomerization barrier. This allows us to selectively obtain desired and stable tautomers, leading to significant modulation of the single-molecule conductance. This work highlights the concept of single-molecule control of chemical reactions on multiple potential energy surfaces. Keto-enol tautomerism offers a promising platform for modulating charge transport at the nanoscale.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Younghun Kim, Heechan Kim, Jung Bae Son, Michael Filatov, Cheol Ho Choi, Nam Ki Lee, Dongwhan Lee
Summary: We invented dual-emissive single-benzene fluorophores that can emit light at different wavelengths simultaneously. This was achieved by modulating the hydrogen bond acidity to generate two emissive tautomers with excited-state proton transfer pathways. The white light emitted by these fluorophores relies on the delicate balance between the energy and intensity of each tautomer's emission. We also synthesized a fluorinated single-benzene fluorophore with a record high solubility in perfluorocarbon solvents and demonstrated their practical utility in white light-emitting devices and multicolor imaging of perfluorocarbon nanodroplets in live cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Patrizia Mazzeo, Shaima Hashem, Filippo Lipparini, Lorenzo Cupellini, Benedetta Mennucci
Summary: In this study, we propose a new method that combines the accuracy of a polarizable embedding QM/MM approach with the computational efficiency of an excited-state self-consistent field method to investigate the excited-state dynamics of molecules embedded in complex matrices. We apply this method to the photoactivation of the blue-light-using flavin (BLUF) domain of the AppA protein and demonstrate the presence of a proton-coupled electron transfer (PCET) process, which has been suggested in other BLUF proteins.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Joanna Drabik, Lukasz Marciniak
Summary: The luminescence thermometry method utilizes the strong thermal dependence of thermally induced excited state absorption to improve temperature readout parameters, and can be applied for 2D thermal imaging of microelectronic printed circuit boards using the strong color changes exhibited by phosphors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Luis F. B. Fontes, Joao Rocha, Artur M. S. Silva, Samuel Guieu
Summary: The effective utilization of luminescent dyes requires a comprehensive understanding of their excitation and relaxation pathways, including Excited-State Proton Transfer (ESPT). Experimental demonstration of ESPT can be challenging due to competing phenomena. A holistic approach, integrating experimental results, computational analysis, and diverse mechanism assessment, is crucial for verifying the occurrence of ESPT.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Review
Chemistry, Physical
Wei Xu, Ruihao Li, Chenhao Wang, Jiahe Zhong, Junyang Liu, Wenjing Hong
Summary: This review article explores the excitation mechanisms between molecules and plasmonic nanocavities, discusses the influence of nanostructures on excited-state properties, and presents potential applications and challenges in single-molecule optoelectronic devices.
Article
Chemistry, Physical
Kohei Imura, Keisuke Imaeda
Summary: Organic microcrystals have attracted much attention due to their ability to confine and transport light at the micrometer scale. The visualization of photonic modes excited in these crystals is important for a better understanding and practical application. This study directly visualized the photonic modes excited in square-shaped perylene microcrystals using a scanning nearfield optical microscope. The findings demonstrate that Fabry-Perot modes are predominantly excited compared to whispering gallery modes in two-dimensional organic microcrystals, providing insights for the design of microscale waveguides and photonic integrated circuits.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Organic
Thibault Pariat, Timothee Stoerkler, Clement Diguet, Adele D. Laurent, Denis Jacquemin, Gilles Ulrich, Julien Massue
Summary: This study investigates the influence of direct (hetero)arylation on the optical properties of ESIPT dyes, revealing different excited-state dynamics depending on the nature of substitution and a strong increase in quantum yield in the solution state for pyridine substitution. The development of a second series of dyes with alkyl or aryl pyridinium moieties showing strong tunable solution/solid fluorescence intensity is also demonstrated.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Analytical
Xuan Zhao, Qingzhi Han, Na Na, Jin Ouyang
Summary: This strategy, based on UCNPs loaded DNA probes, enables detection of the number of cell membrane surface receptor proteins through two-color ratio imaging, with high controllability and sensitivity. It provides a new platform for cancer diagnosis and treatment.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Zhongyan Huang, Honghui Xie, Jingsheng Miao, Yaxiong Wei, Yang Zou, Tao Hua, Xiaosong Cao, Chuluo Yang
Summary: Multipleresonance thermally activated delayed fluorescence (MR-TADF)emitters with a multichannel reverse intersystem crossing (RISC) pathway were developed using an orthogonal linking strategy. The resulting emitter, CzBN3, showed a 23-fold increase in RISC rate, high photoluminescence quantum yield, and narrow emission spectrum. This design strategy enabled high maximum external quantum efficiency and reduced efficiency roll-off in the device. The state-of-the-art electroluminescent performance validates the superiority of this molecular design strategy.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yong Ren, Lei Zhou, Xin Li
Summary: Novel strategies were developed to optimize the photophysical properties of organic fluorophores for imaging probes. By mimicking the excited-state intramolecular proton transfer (ESIPT) effect, a series of 2-(2-hydroxyphenyl)-benzothiazole (HBT) derivatives were designed by complexing the heteroatoms therein with a boron atom, resulting in significant red-shifted emission wavelengths, enhanced quantum yields, and minimal impact on molecular size. Notably, compounds 12B and 13B emitted in the near-infrared region, making them among the smallest organic structures with emission above 650 nm.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Wenxiong Zhang, Hao Ma, Sen Li, Dengwei Hu, Xingang Kong, Shinobu Uemura, Takafumi Kusunose, Qi Feng
Editorial Material
Nanoscience & Nanotechnology
Monika Fleischer, Dai Zhang, Alfred J. Meixner
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2020)
Article
Chemistry, Physical
Quan Liu, Frank Wackenhut, Liangxuan Wang, Otto Hauler, Juan Carlos Roldao, Pierre-Michel Adam, Marc Brecht, Johannes Gierschner, Alfred J. Meixner
Summary: Tautomerization is a fundamental chemical reaction involving proton relocation, presenting a challenge in studying the optical properties of tautomeric species. Single-molecule experiments reveal the reorientation of the transition dipole moment during tautomerization in molecules such as hypericin. By combining image pattern flipping observations with time-dependent density functional theory calculations, this study identifies four tautomers and their conversion path in hypericin molecules.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Kai Braun, Otto Hauler, Dai Zhang, Xiao Wang, Thomas Chasse, Alfred J. Meixner
Summary: Surface charging effects at metal-molecule interfaces have significant impacts on the performance of organic electronics, especially with the ongoing downsizing of organic components. A spectroscopic approach based on tip-enhanced Raman spectroscopy (TERS) is utilized to study metal-molecule interfaces under applied voltage, revealing how intrinsic inductive effects in molecules can shift electron density distribution when bias voltage is applied. This experiment provides valuable insights into charged metal-molecule interfaces.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Otto Hauler, Lukas A. Jakob, Kai Braun, Florian Laible, Monika Fleischer, Alfred J. Meixner, Frank Wackenhut
Summary: This study presents an approach to measuring small separations between plasmonic nanoparticles by detecting the phase of scattered light. A combination of confocal microscopy and a Michelson interferometer is used to measure the phase change caused by single nanoparticles in diffraction-limited focal volumes. The phase shift in the scattered light is found to be dependent on the particle gap, showing a similar trend to the spectral shift observed in plasmon rulers based on dipole-dipole coupling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Wassie Mersha Takele, Frank Wackenhut, Quan Liu, Lukasz Piatkowski, Jacek Waluk, Alfred J. Meixner
Summary: By interacting with the vacuum electromagnetic field in an optical microcavity, it is possible to control the tautomerization of single phthalocyanine molecules and alter their photoinduced tautomerization. Inside the microcavity, the average fluorescence lifetime of molecules decreases significantly, reducing the possibility of molecules entering the triplet state.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Saeed Nosrati, Tim Rammler, Alfred J. Meixner, Frank Wackenhut
Summary: Research interest in strong coupling is driven by the potential to control and modify chemical reactions by tuning the energy levels of molecules. Strong coupling forms new hybrid modes through coherent energy exchange between individual constituents. The coupled system must be considered as a whole, as altering one parameter affects the entire system due to the interdependence of individual components.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Peng Miao, Yu-Ting Chen, Lin Pan, Anke Horneber, Katharina Greulich, Thomas Chasse, Heiko Peisert, Pierre-Michel Adam, Ping Xu, Alfred Meixner, Dai Zhang
Summary: Confocal optical microscopy and tip-enhanced optical microscopy were used to characterize the defect distributions in chemical vapor deposition-grown WS2 monolayer triangles. The presence of defects was revealed with diffraction-limited spatial resolution in their photoluminescence images, and the inhomogeneous defect density distribution was calculated. The surface-enhanced Raman spectroscopy effect was investigated, showing higher enhancement effects at defect-rich areas. Tip-enhanced optical measurements revealed morphologically defected areas invisible in confocal optical measurements.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Liangxuan Wang, Quan Liu, Frank Wackenhut, Marc Brecht, Pierre-Michel Adam, Johannes Gierschner, Alfred J. Meixner
Summary: The study investigates the tautomerization of single hypericin molecules in free space and in a λ/2 Fabry-Perot microcavity. The results show that the microcavity modifies the local photonic environment of the molecules, leading to correlated fluorescence intensity and excited state lifetime changes. The observed changes provide insights into the temporal behavior of tautomerization with high sensitivity and temporal resolution.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Optics
Mai He, Cuihuan Ge, Kai Braun, Lanyu Huang, Xin Yang, Hepeng Zhao, Alfred J. Meixner, Xiao Wang, Anlian Pan
Summary: This study reports the fluorescence blinking phenomenon in MoS2 atomic layers in a hybrid heterostructure with quantum dots at room temperature. The single-photon nature of quantum dots in the heterostructures is demonstrated through measurement. The fluorescence blinking behavior in MoS2 is attributed to single-photon energy transfer from quantum dots to MoS2.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Yu. B. Ivanova, Yu. V. Khrushkova, M. M. Lukanov, S. G. Pukhovskaya, A. V. Lyubimtsev, S. A. Syrbu
Summary: The complexing properties of several electron-rich porphyrin ligands towards Zn2+ were studied by spectrophotometry, and the substituents on the meso-phenyl fragments were found to significantly affect the spectral and coordination properties of the analyzed compounds.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Saeed Nosrati, Frank Wackenhut, Christoph Kertzscher, Marc Brecht, Alfred J. Meixner
Summary: In this study, three-color Forster resonance energy transfer (triple FRET) was achieved between three spectrally distinct fluorescent dyes by selectively controlling their fluorescence lifetimes using the Purcell effect. The presence of triple FRET energy transfer was confirmed by selective acceptor photobleaching. Additionally, the triple FRET process was modeled using coupled rate equations to estimate the energy transfer rates between donor and acceptors. This fundamental study has the potential to expand the application of FRET to investigate complex systems involving interactions between more than two constituents.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Lin Pan, Peng Miao, Anke Horneber, Alfred J. Meixner, Pierre-Michel Adam, Dai Zhang
Summary: This study investigates the effects of structural irregularities on the electronic structure of two-dimensional transition metal dichalcogenides (TMDCs) using nonlinear optical spectroscopy and microscopy. It is found that the edges of tungsten disulfide (WS2) flakes exhibit the strongest second harmonic generation (SHG) intensity, which is anticorrelated with the room-temperature two-photon photoluminescence (2PPL) response in monolayer WS2. This work provides a convenient method to probe the second-order susceptibility of TMDCs and achieve high optical frequency converted signals for nonlinear optical applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Wassie Mersha Takele, Lukasz Piatkowski, Frank Wackenhut, Sylwester Gawinkowski, Alfred J. Meixner, Jacek Waluk
Summary: The study investigates the Raman scattering properties of different molecules under vibrational strong coupling conditions. While polariton states are observed in the IR transmission spectra, they are not detected in the Raman spectra. Results also suggest that changes in the Raman spectra are not necessarily caused by strong coupling, but by surface enhancement effects.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Emre Gurdal, Anke Horneber, Alfred J. Meixner, Dieter P. Kern, Dai Zhang, Monika Fleischer
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)