Article
Chemistry, Multidisciplinary
Walter Fuscaldo, Francesco Maita, Luca Maiolo, Romeo Beccherelli, Dimitrios C. Zografopoulos
Summary: In this study, the dielectric properties of three commercially available high-permittivity Rogers laminates were characterized in the sub-terahertz range using terahertz time-domain spectroscopy measurements. A transmission-line model was developed to obtain reflectance spectra by fitting the frequency-dispersive complex relative permittivity of the substrates. The results showed that the thermoset microwave laminate TMM10i exhibited lower frequency dispersion and overall dielectric losses, making it a promising candidate for low-profile and broadband components in novel terahertz applications.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Xiujun Zheng, Thomas Gevart, Guilhem Gallot
Summary: The ATR terahertz sensor based on a quantum-cascadelaser offers high sensitivity and stability for detecting very low concentration solutions, with a dynamic range and long-term stability of 40 dB. This extends the potential of terahertz radiation for analyzing liquid and biological samples, as demonstrated by measurements on standard solutions of ions, sugars, and proteins with concentrations as low as 1 µM.
Article
Multidisciplinary Sciences
Liwen Jiang, Ke Zhang, Yixin Yao, Shuai Li, Jiao Li, Zhen Tian, Weili Zhang
Summary: This article introduces a new method for analyzing aqueous salt solutions using terahertz optoacoustics. The method manipulates terahertz optoacoustic signals through temperature control to reduce water background and provide more solute information. The results demonstrate the significant potential of this method for distinguishing different salt solutions and quantitatively analyzing salt concentrations.
Article
Physics, Multidisciplinary
A. Alexandre, M. Mangeat, T. Guerin, D. S. Dean
Summary: Using a general adsorption desorption model with surface diffusion, this study analytically shows that making surfaces or obstacles attractive can accelerate dispersion.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Fengrui Yao, Wentao Yu, Can Liu, Yingze Su, Yilong You, He Ma, Ruixi Qiao, Chunchun Wu, Chaojie Ma, Peng Gao, Fajun Xiao, Jianlin Zhao, Xuedong Bai, Zhipei Sun, Shigeo Maruyama, Feng Wang, Jin Zhang, Kaihui Liu
Summary: Non-invasive, high-throughput spectroscopic techniques can identify the chiral indices of carbon nanotubes down to the single-tube level. However, optical methods have failed to accurately characterize the handedness of single nanotubes due to weak chiroptical signals. By using Rayleigh scattering circular dichroism, the complete structure identification of single nanotubes in terms of both chiral indices and handedness has been successfully demonstrated. This method enhances the nanotube's chiroptical signal significantly, enabling exploration of handedness-related functionality of single nanotubes.
NATURE NANOTECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
F. Javier Garcia de Abajo, Eduardo J. C. Dias, Valerio Di Giulio
Summary: This study reveals the nonlinear and recoil effects in the interaction between individual low-energy electrons and samples with a discrete number of states. The research highlights the potential of free electrons to control localized excitations and delineates the boundaries of such control.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Baihong Li, Changhua Chen, Xiao Xiang, Runai Quan, Ruifang Dong, Shougang Zhang, Xiangying Hao, Rui-Bo Jin
Summary: We propose a theoretical quantum interferometer that combines the NOON state interferometer with the Hong-Ou-Mandel interferometer. This interferometer can show temporal interference patterns related to biphoton frequency sum and difference in different parts of a single interferogram. By taking a Fourier transform, it is possible to obtain spectral correlation information of biphotons in both frequency sum and difference simultaneously, providing a method for complete spectral characterization of arbitrary two-photon states. This interferometer also has potential applications in quantum Fourier-transform spectroscopy and quantum metrology.
Article
Physics, Fluids & Plasmas
Prince Kumar, Devendra Sharma
Summary: Collective excitations of rotating dusty plasma were analyzed under the quasi-localized charge approximation for strongly coupled systems, with consideration for dust rotation. The study emphasized the relaxation introduced by rotation in their strong coupling and two-dimensional characteristics. A finite rotation version of both strong and weak coupling dispersions was derived and analyzed, showing the correspondence between different branches and relevant to various experimental conditions.
PHYSICS OF PLASMAS
(2021)
Article
Chemistry, Multidisciplinary
Qingkai Tang, Xinhua Zhu
Summary: The paper investigates the structural, optical, dielectric, and magnetic properties of LFRO powders synthesized under CO reduced atmosphere, revealing their crystalline structure, molar ratios of elements, dielectric relaxation behavior, room temperature ferromagnetism, and optical band gap characteristics. The LFRO powders exhibit column-like morphology, relaxor-like dielectric behavior, room temperature ferromagnetism, and a direct optical band gap of 2.30 eV with a strong peak around 556 nm in their green photoluminescence spectra.
Article
Polymer Science
Aleksandra Radko, Sebastian Lalik, Aleksandra Deptuch, Teresa Jaworska-Golab, Robert Ekiert, Natalia Gorska, Katarzyna Makyla-Juzak, Jacek Niziol, Monika Marzec
Summary: The study investigated DNA complexes with different surfactants using Fourier transform middle infrared spectroscopy, X-ray diffraction and dielectric spectroscopy methods, confirming electrostatic interactions in complex formation. A packing model for the complex molecules, depending on the type of surfactant, was proposed based on SAXS results. The dielectric process in low frequency range was interpreted as oscillation of surfactant ions, similar to ions in pure DNA solutions.
Article
Materials Science, Multidisciplinary
Markus Mehnert, Mokarram Hossain, Paul Steinmann
Summary: Dielectric elastomers are solid polymeric materials that can deform under an electric field, making them suitable for energy harvesters, sensors, and soft actuators. However, the influence of thermal effects should be considered in their application, as the base materials often show thermal sensitivity that affects their mechanical response.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Engineering, Electrical & Electronic
M. Bouzayen, R. Dhahri, A. Benali, S. Chaabouni, K. Khirouni, B. F. O. Costa
Summary: In this study, La(0.75)Ba(0.10)Sr(0.15)FeO(2.875-δ) oxygen-deficient ferrites were synthesized by sol-gel method and characterized through physical and electrical analysis. The nanocrystalline compounds exhibited semiconductor behavior, and the electrical measurements indicated the influence of grain boundaries on transport properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
F. C. M. Freire, W. R. Weinand, T. M. Andrade, J. A. da Cruz, I. Hammami, M. P. F. Graca, P. M. O. Silva, A. J. M. Sales
Summary: Simulated Body Fluid (SBF) for biomedical research is characterized dielectrically using impedance spectroscopy, which showed that the real and imaginary parts of the electrical admittance of SBF are influenced by the concentrations of ions dissolved in it. The time dependence of volume dielectric parameters of SBF exhibited exponential behavior, independent of hydroxyapatite (HAp), while the surface dielectric parameters showed significant differences in the presence of HAp. By employing chemical kinetics and the integrated rate law, the half-life time was determined.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
A. Bandyopadhyay, B. J. Sarkar, S. Sutradhar, J. Mandal, P. K. Chakrabarti
Summary: By incorporating Gd3+ ions instead of Ce4+ ions in cerium oxide lattice, improvements were made in its magneto-dielectric properties. Nonlinearity due to magnetic ordering was introduced in the doped sample Ce0.90Gd0.10O2-delta, indicating a transition to ferromagnetic phase. Transmission electron microscopy study revealed important morphological behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Meng Han, Peipei Ge, Jiguo Wang, Zhenning Guo, Yiqi Fang, Xueyan Ma, Xiaoyang Yu, Yongkai Deng, Hans Jakob Woerner, Qihuang Gong, Yunquan Liu
Summary: The article introduces the measurement of tunneling electron dynamics and explores electron non-stationary tunneling dynamics using the attoclock with two-color phase-of-phase photoelectron spectroscopy. By combining different techniques, researchers successfully measured the sub-barrier phase and amplitude of tunneling electrons, providing a high time resolution approach to studying the quantum dynamics of intense light-matter interactions.
Article
Chemistry, Physical
Daniel Braun, Othmar Steinhauser
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2015)
Article
Chemistry, Physical
Michael Schmollngruber, Daniel Braun, Othmar Steinhauser
JOURNAL OF CHEMICAL PHYSICS
(2016)
Article
Chemistry, Physical
Michael Schmollngruber, Daniel Braun, Othmar Steinhauser
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Chemistry, Physical
Daniel Braun, Michael Schmollngruber, Othmar Steinhauser
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Chemistry, Physical
Michael Schmollngruber, Daniel Braun, Daniel Oser, Othmar Steinhauser
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Chemistry, Physical
Daniel Braun, Michael Schmollngruber, Othmar Steinhauser
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2017)
Article
Chemistry, Physical
Christian Schroeder, Marcello Sega, Michael Schmollngruber, Elias Gailberger, Daniel Braun, Othmar Steinhauser
JOURNAL OF CHEMICAL PHYSICS
(2014)
Article
Chemistry, Physical
Daniel Braun, Stefan Boresch, Othmar Steinhauser
JOURNAL OF CHEMICAL PHYSICS
(2014)
Article
Chemistry, Physical
Sonja Gabl, Christian Schroeder, Daniel Braun, Hermann Weingaertner, Othmar Steinhauser
JOURNAL OF CHEMICAL PHYSICS
(2014)
Article
Chemistry, Physical
Esther Heid, Philipp Honegger, Daniel Braun, Andras Szabadi, Toda Stankovic, Othmar Steinhauser, Christian Schroeder
JOURNAL OF CHEMICAL PHYSICS
(2019)
Article
Multidisciplinary Sciences
Lukas Bartonek, Daniel Braun, Bojan Zagrovic
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Chemistry, Physical
Esther Heid, Daniel Braun
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
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)