Article
Chemistry, Physical
Xiao Li, Caiyue Wen, Liting Yang, Ruixuan Zhang, Xiaohui Li, Yuesheng Li, Renchao Che
Summary: MXene is used as a microwave absorber to defense electromagnetic pollution, and the excessive conductivity of single-layer MXene is reduced by preparing a flexible MXene/FeCo film via vacuum-assisted filtration, with the intercalation of magnetic nanoparticles destroying the continuous layered structure. The rough surface of nanoflower-like FeCo alloy enhances interfacial polarization and magnetic loss capabilities, leading to better microwave absorption performance.
Article
Engineering, Electrical & Electronic
Henan Zeng, Ruoming Li, Wangzhe Li
Summary: A photonic microwave frequency quadrupler with decoupled bandwidth and carrier frequency is proposed and demonstrated. It can generate multi-octave signals by utilizing two phase-correlated photonic mixers, achieving decoupling between bandwidth and center frequency.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Lihong Wang, Shunlin Su, Yude Wang
Summary: Fe3O4-graphite composites prepared through a solvothermal method exhibit excellent bimodal microwave absorption performance with good electromagnetic properties and impedance matching characteristics. Fe3O4-2PG sample shows good absorption peaks in both C-band and Ku-band, broadening the absorption bandwidth of electromagnetic waves.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Ceramics
Peng He, Zhi-Ling Hou, Wen-Qiang Cao, Jie Yuan, Mao-Sheng Cao
Summary: The study successfully prepared rutile TiO2 nanorods through a two-step method and demonstrated their excellent charge storage capacity. The research findings suggest that resonant polarization of ionic clusters formed by oxygen ions and titanium ions can lead to frequency-selective absorption of EM waves.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Inorganic & Nuclear
Rafael Calvo, Rosana P. Sartoris, Otaciro R. Nascimento, Matus Sedivy, Antonin Sojka, Petr Neugebauer, Vinicius T. Santana
Summary: In this work, recent advances in the interpretation of EPR spectral changes in dimeric spin arrays with weak inter-dimeric couplings are collected. Experimental results are explained by proposing a spin model with a microscopic flip-flop mechanism involving the absorption and emission of two simultaneous spin-one excitations. The model considers the role of energy conservation in the process and allows for analysis and simulation of the EPR spectra features.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Li Wang, Zhang Chen, Xue Wang, Liying Zhang, Zongtao Zhang, Qi Zhao, Yanfeng Gao
Summary: In this study, Fe3O4@C 3D foam was prepared and its microwave attenuation performances and mechanisms were studied. By adjusting the content of Fe3O4@C 3D foam in paraffin composites, the low-frequency microwave attenuation capacity could be effectively optimized. This method provides a new perspective for preparing lightweight and high performance low-frequency microwave absorbing materials.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
Udeshwari Jamwal, Dharmendra Singh, K. L. Yadav
Summary: In this study, a CI/BFO nanocomposite was prepared, and its morphology was modified to enhance the microwave absorption bandwidth. An advanced electromagnetic technique utilizing Genetic Algorithm was employed to optimize the design of triple-layer microwave absorbers, resulting in impressive absorption performance across a wide frequency range and low coating thickness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
V Tiwari, M. Morita, T. Inoue, S. Ando, S. Kuroda, H. Boukari, L. Besombes
Summary: This article investigates the dynamics of a spin system composed of a positively charged II-VI semiconductor quantum dot doped with a single Cr+ ion. The resonant photoluminescence (PL) of the positively charged exciton coupled with the Cr+ spin is used to analyze the main spin relaxation channels. Optical pumping of the spin of the resident hole-Cr+ complex reduces the intensity of resonant PL, acting as a nanomagnet. Nonresonant optical excitation partially erases the spin memory, leading to an increase in resonant PL signal. The observed optical transitions with a change in the Cr+ spin in the resonant-PL excitation spectra allow the determination of the magnetic anisotropy of the magnetic atom. Optical excitation affects the effective temperature of the hole-Cr+ spin system through the local generation of phonons, as shown by optical pumping, autocorrelation measurements, and power dependence of PL intensity distribution.
Article
Chemistry, Physical
Huai Zhao, Huajiang Ouyang, Haicheng Zhang
Summary: This study proposes a novel hybrid triboelectric-electromagnetic energy harvester and validates the accuracy of the theoretical model through experiments. The structural response and electrical output under different external excitations are theoretically investigated. It is found that the harvester has good sensitivity to small-angle ultra-low-frequency rocking excitations, making it an effective device for low-frequency energy harvesting.
Article
Chemistry, Physical
Longqi Yang, Yan Wang, Zhao Lu, Runrun Cheng, Nian Wang, Yongfei Li
Summary: In order to solve the problem of electromagnetic pollution, we have successfully synthesized a multi-dimensional graphene-based aerogel decorated with one-dimensional carbon nanotubes and metal-organic framework derivatives. The composite material exhibits excellent microwave absorption properties due to its multi-dimensional gradient, defects, heterogeneous interfaces, and unique porous structure. The optimum absorption performance of -58.8 dB is achieved with a filler loading of 20 wt%, a thickness of 1.8 mm, and an effective absorption bandwidth of 7.6 GHz, covering the entire Ku-band.
Article
Chemistry, Physical
Aliaksandra Lisouskaya, Peter Tarabek, Ian Carmichael, David M. Bartels
Summary: This study observed the existence of long-lived radicals in RTILs composed of Tf2N- anion with hmim+ and bmim+ cations. The structures of the stable radicals formed were suggested to be radical cations containing specific configurations of nitrogen and hydrogen atoms in imidazole.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Engineering, Environmental
Xiang Li, Luting Zhu, Takaaki Kasuga, Masaya Nogi, Hirotaka Koga
Summary: A microwave absorber has been developed that can intelligently and reversibly adjust its absorption and transmission properties to transmit desired frequencies and absorb unwanted frequencies. This absorption-frequency tunability is achieved by reducing the thickness of a carbon aerogel while maintaining its moderate dielectric loss. This study provides insights into the smart and reversible control of microwave absorbing properties and paves the way for multifunctional and robust absorbers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Marijn A. M. Versteegh, Stephan Steinhauer, Josip Bajo, Thomas Lettner, Ariadna Soro, Alena Romanova, Samuel Gyger, Lucas Schweickert, Andre Mysyrowicz, Val Zwiller
Summary: Studies have shown the existence of giant Rydberg excitons in cuprous oxide at T = 38 mK, with principal quantum numbers up to 30, corresponding to a calculated diameter of 3 micrometers. Photoluminescence excitation spectroscopy can be used to probe transition probabilities between different excitonic states.
Article
Materials Science, Multidisciplinary
Yu Lei, Wenfeng Wang, Guoguo Tan, Xiaoyun Shang, Xiangyun Huang, Qikui Man
Summary: Rare earth dysprosium-doped Ba3Co2Fe24-xDyxO41 (x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10) Z-type hexaferrites were prepared by the sol-gel method. The effects of Dy doping on the crystal structure, morphology, magnetic properties, and electromagnetic wave absorption performance were investigated. The results showed that increasing the Dy doping amount improved the saturation magnetization and soft magnetic properties of the material. The material with an x value of 0.04 exhibited the best microwave absorption performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Biochemistry & Molecular Biology
Mikhail Yu Ivanov, Yuliya F. Polienko, Igor A. Kirilyuk, Sergey A. Prikhod'ko, Nicolay Yu Adonin, Matvey Fedin
Summary: This study examines the microscopic properties of ionic liquid-water mixtures, focusing on viscosity and local structuring, using continuous wave and pulse EPR spectroscopy. It is found that in the glassy state, the nanostructuring of IL-rich domains is similar to that in neat ILs, while in the liquid state, the local viscosity in IL-rich domains is affected by the presence of residual water.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Semir Tulic, Thomas Waitz, Maria Caplovicova, Gerlinde Habler, Marian Varga, Mario Kotlar, Viliam Vretenar, Oleksandr Romanyuk, Alexander Kromka, Bohuslav Rezek, Viera Skakalova
Article
Chemistry, Multidisciplinary
Yongping Liao, Kimmo Mustonen, Semir Tulic, Viera Skakalova, Sabbir A. Khan, Patrik Laiho, Qiang Zhang, Changfeng Li, Mohammad R. A. Monazam, Jani Kotakoski, Harri Lipsanen, Esko I. Kauppinen
Article
Multidisciplinary Sciences
Christoph Hofer, Viera Skakalova, Tobias Goerlich, Mukesh Tripathi, Andreas Mittelberger, Clemens Mangler, Mohammad Reza Ahmadpour Monazam, Toma Susi, Jani Kotakoski, Jannik C. Meyer
NATURE COMMUNICATIONS
(2019)
Article
Chemistry, Multidisciplinary
Mai N. Nguyen, Udo Kragl, Ingo Barke, Regina Lange, Henrik Lund, Marcus Frank, Armin Springer, Victoria Aladin, Bjorn Corzilius, Dirk Hollmann
COMMUNICATIONS CHEMISTRY
(2020)
Article
Chemistry, Physical
Semir Tulic, Thomas Waitz, Maria Caplovicova, Gerlinde Habler, Viliam Vretenar, Toma Susi, Viera Skakalova
Summary: The study utilizes aberration-corrected transmission electron microscopy, Raman spectroscopy, and electrical transport measurements to investigate the structural changes during nickel-catalyzed graphitization of diamond, revealing competing atomistic processes and etching mechanisms influenced by different diamond surface orientations. This research sheds light on the synthesis of graphene-on-diamond heterostructures by clarifying the etching mechanisms and the impact of diamond surface terminations.
Article
Biochemistry & Molecular Biology
Thomas Biedenbaender, Vanessa de Jesus, Martina Schmidt-Dengler, Mark Helm, Bjoern Corzilius, Boris Fuertig
Summary: Modified nucleotides expand the chemical and conformational space of RNAs, especially tRNAs. These modifications increase the overall thermal stability of tRNA while also increasing local conformational dynamics, resulting in the stabilization of the overall tertiary structure and the formation of long-range interactions.
NUCLEIC ACIDS RESEARCH
(2022)
Article
Engineering, Biomedical
Raju Nanda, Shani Hazan, Katrein Sauer, Victoria Aladin, Keren Keinan-Adamsky, Bjoern Corzilius, Ron Shahar, Paul Zaslansky, Gil Goobes
Summary: Bone is a complex biomaterial with a hierarchical structure composed of collagen fibers, mineral phases, and water molecules. This study compared the structural and property differences between bones from sturgeon fish and pike fish, revealing disparities in collagen fiber structure, mineral phases, citrate content, and water permeability. These findings suggest that different strategies are utilized in the formation of mineral-organic interfaces in bones with different osteogenesis or remodeling pathways, which may affect their mechanical properties.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Victoria Aladin, Arun K. Sreemantula, Thomas Biedenbaender, Alexander Marchanka, Bjoern Corzilius
Summary: An approach is presented to enhance NMR spectroscopic signals by site-specific enhancement of the protein-RNA binding site within a ribonucleoprotein (RNP) using dynamic nuclear polarization (DNP). This approach utilizes biochemical techniques for sparse isotope labeling and exploits the molecular dynamics of C-13-labeled methyl groups exclusively present in the protein, resulting in improved sensitivity and specificity for solid-state NMR structure determination of large biomolecules.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Fagui He, Eugen Klein, Stephan Bartling, Siavash Saeidpour, Bjoern Corzilius, Rostyslav Lesyuk, Christian Klinke
Summary: Colloidal synthesis of 2D SnTe nanosheets was achieved through precursor hot injection in a nonpolar solvent. The formation and morphology evolution of the SnTe nanostructures were explained from a mechanistic perspective, as well as the role of each ligand at a molecular scale. The interplay of ligands provided the necessary conditions for stable low-dimensional SnTe nanomaterials with tunable size and shape.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Nicholas Alaniva, Edward P. Saliba, Patrick T. Judge, Erika L. Sesti, Wolfgang Harneit, Bjoern Corzilius, Alexander B. Barnes
Summary: Frequency-chirped microwaves are used to decouple electron- and C-13-spins in magic-angle spinning N@C-60:C-60 powder, resulting in a 12% increase in DNP-enhanced C-13 NMR signal intensity for 7 s polarization, and a 5% increase for 30 s polarization. This demonstration of electron decoupling is a step towards utilizing N@C-60 as a controllable electron-spin source for magic-angle spinning magnetic resonance experiments.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Victoria Aladin, Arun K. K. Sreemantula, Thomas Biedenbaender, Alexander Marchanka, Bjoern Corzilius
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Thomas Biedenbaender, Edvards R. Bensons, Bjoern Corzilius
Summary: With the increasing size of molecules in structural biology, site-specificity and sensitivity enhancement methods in solid-state magic-angle spinning NMR spectroscopy are becoming more crucial. SCREAM-DNP, a method exploiting selective dynamic groups within molecules, has been developed to enhance NMR signals. In this study, rotational resonance (R-2) is reintroduced during SCREAM-DNP to further enhance experiment selectivity. The analysis of polarization buildup dynamics in a model system demonstrates that dipolar-recoupled transfer rates exceed DNP buildup dynamics, enabling selective and efficient hyperpolarization of larger distances.
Article
Chemistry, Physical
Nadine Weiss, Gabi Thielemann, Kevin Nagel, Caroline H. Schmidt, Andreas Seifert, Lysann Kassner, Veronika Strehmel, Bjoern Corzilius, Christian Schroeder, Stefan Spange
Summary: The UV/Vis absorption data of ThTCF as a solvatochromic probe was used to examine the anion coordination strength in ionic liquids with different cation structures, showing correlations with hydrogen bond accepting ability-related measurands. The impact of n-alkyl chain length of imidazolium- and tetraalkylammonium-based ILs on dipolarity and HBA strength was confirmed. Comparison with N-14 isotropic hyperfine coupling constants revealed different influences of the cation structures on the absorption energy and E-HB of ThTCF.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Joerg Heiliger, Tobias Matzel, Erhan Can Cetiner, Harald Schwalbe, Georg Kuenze, Bjoern Corzilius
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Spectroscopy
Victoria Aladin, Bjoern Corzilius