Article
Chemistry, Multidisciplinary
Zuzanna Z. Janczuk, Agnieszka Jedrych, Sylwia Parzyszek, Anita Gardias, Jacek Szczytko, Michal Wojcik, Paola Tiberto
Summary: This study reports the preparation of MNPs composites using excess liquid crystal-like ligands, which allows for precise and reversible control of magnetic nanoparticles in thin films, showing great potential for various applications.
Article
Chemistry, Multidisciplinary
Lorenzo Cursi, Silvia Vercellino, Mura M. McCafferty, Emily Sheridan, Vanya Petseva, Laurent Adumeau, Kenneth A. Dawson
Summary: Magnetic nanoparticles are valuable tools for studying complex intracellular bio-nano interactions. By synthesizing biocompatible multifunctional nanoparticles with fluorescent properties, intracellular tracking of nanoparticles can be achieved, providing a promising approach for studying bio-nano interactions.
Article
Green & Sustainable Science & Technology
Rajiv Periakaruppan, Jianjie Li, Huiling Mei, Ying Yu, Shunkai Hu, Xuan Chen, Xinghui Li, Guiyi Guo
Summary: This study focused on the biofabrication of superparamagnetic iron oxide nanoparticles (Li-SPIONs) using lignin from agro-wastes as a capping and reducing agent, with the aim of producing biopolymer mediated nanomaterials. Characterization of lignin mediated biogenic iron oxide nanomaterials revealed their spherical shape and magnetic properties. Antioxidant activities of the biogenic iron oxide nanomaterials were evaluated, showing potential for the development of novel drugs and biomedical applications in the medicinal field.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Inorganic & Nuclear
Sherin Philip, Sunny Kuriakose
Summary: In this study, alpha-Fe(2)O(3) nanoparticles were successfully synthesized using starch as a bio-macromolecule in a conventional reduction method. The stabilized nanoparticles showed smaller size and superparamagnetic behavior, with promising antimicrobial properties.
JOURNAL OF CLUSTER SCIENCE
(2021)
Article
Chemistry, Physical
Guang Zhao, Xingkun Wang, Caili Dai, Ning Sun, Lihao Liang, Ning Yang, Jiaming Li
Summary: In this study, nano-graphite was used as a foam stabilizer to improve the stability of foam under high-temperature conditions. The synergistic effects of nano-graphite and surfactant significantly enhanced foam stability, leading to improved plugging ability and pressure difference compared to ordinary foam. The mechanism of nanographite stabilization of foam was explained through the increased apparent viscosity, liquid film thickness, and mechanical strength, delaying bubble coalescence and improving overall foam stability.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Antonino Puglisi, Simone Bassini, Erik Reimhult
Summary: Cholesterol plays a crucial role in major cardiovascular and neurodegenerative diseases, and cyclodextrins have shown promising therapeutic efficacy in sequestering and mobilising cholesterol. A new approach involves core-shell superparamagnetic iron oxide nanoparticles functionalised with cyclodextrins, which can specifically cleave off from the nanoparticles' shell at a slightly acidic pH to mobilise cholesterol out of the lysosome. This platform shows potential in removing cholesterol from the lysosomal compartment.
FRONTIERS IN CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
N. A. Usov, R. A. Rytov, V. A. Bautin
Summary: Detailed calculations of the specific absorption rate (SAR) of dilute iron oxide nanoparticles with effective uniaxial anisotropy dispersed in a liquid were performed, showing different behaviors depending on particle diameters and the alternating magnetic field, with the relationship to viscosity being dependent on nanoparticle size. The behavior of SAR was explained by viscous and magnetic oscillation modes, with SAR practically independent of viscosity in the magnetic mode.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Fluids & Plasmas
Anna Yu Solovyova, Ekaterina A. Elfimova, Alexey O. Ivanov
Summary: Research shows that orienting ferroparticle suspensions can enhance magnetic properties, with the effect intensifying with the growth of nanoparticle magnetocrystalline anisotropy. This provides an effective way to improve magnetic response in magnetic soft materials.
Article
Chemistry, Physical
Michael Meloni, Jiyun Hong, Adam S. Hoffman, Sam Holton, Ambarish Kulkarni, Simon R. Bare, Ron C. Runnebaum
Summary: Supported Ni catalysts synthesized using the beta-zeolite framework show improved reaction rate and stability in C2H4 hydrogenation, thanks to dealumination and reductive treatment that result in highly dispersed metal clusters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
V. Jagadeesha Angadi, K. M. Srinivasamurthy, Muhammad Imran, S. P. Kubrin, Mohd Ubaidullah, Shoyebmohamad F. Shaikh, Huajing Gao, Hua Yang, Vinayak K. Pattar, S. O. Manjunatha, Chander Prakash
Summary: In this study, Sr-doped Co-Ni ferrite nanoparticles were quickly synthesized using the Solution Combustion Synthesis method, and the effects of Sr concentration on the structure, microstructure, and magnetic properties were investigated. The results showed that Sr doping caused an increase in lattice parameter, redistribution of various cations, and a decrease in average crystallite size. Additionally, Sr doping led to grain agglomeration. The distribution of iron ions at the A- and B- sites were determined through low-temperature Mössbauer spectroscopy.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Biomaterials
Xue Feng, Yuxiang Xue, Sevil Gonca, Kunlang Ji, Mei Zhang, Francisco R. Garcia-Garcia, Quan Li, Yi Huang, Konstantin V. Kamenev, Xianfeng Chen
Summary: The intrinsic pathological characteristics of tumor microenvironments limit the deep penetration of nanomedicines, but magnetophoresis using external magnetic force shows promise in improving their tumor penetration. However, current research mainly focuses on large nanoparticles, neglecting ultrasmall superparamagnetic iron oxide (Fe3O4) nanoparticles.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Biochemistry & Molecular Biology
Maria Salvador, Gemma Gutierrez, Sara Noriega, Amanda Moyano, Maria Carmen Blanco-Lopez, Maria Matos
Summary: Superparamagnetic magnetite nanoparticles with narrow size distribution have been successfully synthesized through precipitation in water-in-oil microemulsion, showing great potential in medical and environmental applications. The optimization of washing protocol and their applicability in bioapplications have been demonstrated. These novel materials are useful for analytical applications requiring high sensitivity and interference removal, as shown in signal enhancement and magnetic separation tests.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Nanoscience & Nanotechnology
Din Zelikovich, Pavel Savchenko, Daniel Mandler
Summary: Researchers have developed a promising method for selectively detecting amino acid gold nanoparticles. By adsorption, filling, and electrochemical dissolution, they were able to create nanocavities with the shape of the nanoparticles. Spectroscopic and electrochemical studies revealed the interactions between the nanoparticles and the matrix. These findings have implications for the selective and simple sensing of nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
H. Y. Hah, S. Gray, C. E. Johnson, J. A. Johnson, V Kolesnichenko, P. Kucheryavy, G. Goloverda
Summary: Mono-disperse iron oxide nanoparticles synthesized by high-temperature hydrolysis were studied using Mo center dot ssbauer spectroscopy, revealing a critical diameter of around 11 nm for room temperature superparamagnetism. Particles larger than 11.9 nm exhibited ferrimagnetic properties, while particles smaller than 10.6 nm showed superparamagnetism.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kinana Habra, Stephanie E. B. McArdle, Robert H. Morris, Gareth W. V. Cave
Summary: Complete removal of glioblastoma brain tumors is difficult, but embedding carnosine in an externally triggered nano-carrier has shown potential in inhibiting proliferation and activity of tumor cells, with possible implications for inhibiting metastasis and post-surgery monitoring via MRI.
Article
Chemistry, Multidisciplinary
Nikolaos Farmakidis, Nathan Youngblood, June Sang Lee, Johannes Feldmann, Alessandro Lodi, Xuan Li, Samarth Aggarwal, Wen Zhou, Lapo Bogani, Wolfram Hp Pernice, C. David Wright, Harish Bhaskaran
Summary: The authors demonstrate an electrically reconfigurable, ultra-compact, and nonvolatile memory that harmonizes electronics and photonics through localized heat generation and interlocked optical and electrical readout signals, achieving unprecedented energy efficiency.
Article
Engineering, Electrical & Electronic
Gabriele Frigenti, Lucia Cavigli, Fulvio Ratto, Sonia Centi, Tupak Garcia-Fernandez, Daniele Farnesi, Stefano Pelli, Silvia Soria, Gualtiero Nunzi Conti
Summary: Optical microresonators based on Whispering Gallery Modes have been extensively studied for fundamental research and various applications. Microbubbles resonators made from glass capillaries combine high optical and mechanical Q-factors with microfluidics. In this study, they were used as platforms for photoacoustic detection and photothermal spectroscopy, demonstrating their unique capabilities.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Boris Gorshunov, Veniamin Abalmasov, Vladimir Uskov, Yuk Tai Chan, Ece Uykur, Pavel Abramov, Martin Dressel, Victor Thomas, Maxim Savinov
Summary: The quasistatic dielectric permittivity of D2O type I molecules in hydrothermally grown beryl crystals was measured under different internal pressures and D2O type II molecule contents. It was found that all crystals exhibited quantum paraelectric behavior, with permittivity increasing and then saturating below a certain temperature. The data analysis showed that excess internal pressure and excess content of D2O-II molecules led to increased quantum temperature and decreased Curie constant, while the Curie temperature remained unchanged. The enhanced quantum effects in the dipole-dipole-coupled D2O-I molecules were attributed to the enhanced azimuthal tunneling within the hexagonal localizing potential. The study suggests the potential of using crystal growth conditions to control the strength of quantum effects in polar water molecule networks.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Samuel W. Pinnock, Seulki Roh, Tobias Biesner, Artem V. Pronin, Martin Dressel
Summary: In this article, we demonstrated the effective generation of vortex terahertz (THz) beams with angular momenta P = +/- 1 and P = +/- 2 using 3-D printed spiral phase plates (SPPs). The generation of vortex beams was confirmed through frequency-domain transmission spectroscopy. The topological charge P of the vortex beams was determined using phase-sensitive Mach-Zehnder interferometry, and the resulting interference patterns supported the expected intensity distributions for the given P, providing strong evidence for the spatial phase structure of the generated THz vortex beams.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2023)
Article
Instruments & Instrumentation
Yuk Tai Chan, Ece Uykur, Martin Dressel
Summary: In this study, we present the modifications, performance, and test of a diamond anvil cell for radio frequency dielectric spectroscopy studies of single crystals. The modified pressure cell can be used from room temperature down to 4 K and up to pressures of 5-6 GPa, allowing continuous frequency-dependent measurements between 5 Hz and 1 MHz. With an excellent performance and a stray capacitance of around 2 pF that is temperature-, frequency-, and pressure-independent, this cell enables the use of relatively small samples with a weak dielectric response.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Chemistry, Multidisciplinary
Zhixin Chen, Jie-Ren Deng, Songjun Hou, Xinya Bian, Jacob L. Swett, Qingqing Wu, Jonathan Baugh, Lapo Bogani, G. Andrew D. Briggs, Jan A. Mol, Colin J. Lambert, Harry L. Anderson, James O. Thomas
Summary: Since the early days of quantum mechanics, it has been known that electrons have wave-particle duality. In this study, we demonstrate that electron transmission remains phase-coherent in molecular porphyrin nanoribbons connected to graphene electrodes. This opens up new avenues for studying quantum coherence in molecular electronic and spintronic devices.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Cenk Beydeda, Konstantin Nikolaou, Marius Tochtermann, Nikolaj G. Ebensperger, Gabriele Untereiner, Ahmed Farag, Philipp Karl, Monika Ubl, Harald Giessen, Martin Dressel, Marc Scheffler
Summary: This paper discusses various experimental strategies to distinguish designed and spurious modes in coplanar superconducting resonators that are operated in a broad frequency range. These strategies include tracking resonance evolution with temperature, magnetic field, and microwave power. It is also found that local modification of the resonator can lead to characteristic signatures in different resonance modes depending on the local strength of the electric or magnetic microwave fields.
Article
Chemistry, Multidisciplinary
Jesus Carlos Guzman-Minguez, Cecilia Granados-Miralles, Patrick Kuntschke, Cesar de Julian Fernandez, Sergey Erokhin, Dmitry Berkov, Thomas Schliesch, Jose Francisco Fernandez, Adrian Quesada
Summary: This study aims to explore the magnetic properties of hard-soft composite permanent magnets and their correlation with microstructure. The experimental results show that increasing the particle size of the soft phase can enhance the remanence in injection molded magnets. Through experimental analysis and simulations, it is revealed that the interaction between the hard and soft phases is of a dipolar nature.
Article
Materials Science, Multidisciplinary
Alexander A. Tsirlin, Brenden R. Ortiz, Martin Dressel, Stephen D. Wilson, Stephan Winnerl, Ece Uykur
Summary: High-pressure single-crystal x-ray diffraction experiments show that the superconducting kagome metal CsV3Sb5 undergoes a transformation from hexagonal to monoclinic symmetry above 10 GPa under nonhydrostatic pressure conditions. This is different from its behavior under quasihydrostatic conditions in neon where it retains hexagonal symmetry up to at least 20 GPa. The monoclinic distortion mainly affects the honeycomb nets of Sb atoms, while the kagome planes remain almost unchanged. Ab initio density-functional calculations reveal that there are only minor changes in the electronic structure between the quasihydrostatic and nonhydrostatic cases. The reentrant behavior is likely caused by Fermi surface reconstruction driven by the formation of interlayer Sb-Sb bonds in both monoclinic and hexagonal CsV3Sb5 structures at high pressures.
Article
Materials Science, Multidisciplinary
R. Roesslhuber, R. Huebner, M. Dressel, A. Pustogow
Summary: We investigate the dielectric properties of the molecular quantum-spin-liquid candidate K-(BEDT-TTF)2 Ag2(CN)3 under varying frequency, pressure, and temperature. The transition from incoherent semiconducting to Mott-insulating state leads to a decrease in the low-frequency dielectric constant to small positive values (~10). The characteristic relaxor-type peak shifts to lower temperatures with increased pressure, and an additional feature appears near the percolative first-order transition. The pressure-dependent dielectric response is similar to the sister compound K-(BEDT-TTF)2Cu2(CN)3.
Article
Materials Science, Multidisciplinary
Yuk Tai Chan, Natanja Elliger, Berina Klis, Marton Kollar, Endre Horvath, Laszlo Forro, Martin Dressel, Ece Uykur
Summary: Hybrid organic-inorganic halide perovskites have potential as next-generation photovoltaic materials, but their structure stability and composition pose challenges. By using external pressure, ion migration can be suppressed and the structural transition can be enhanced and stabilized.
Article
Materials Science, Multidisciplinary
M. Wenzel, A. A. Tsirlin, O. Iakutkina, Q. Yin, H. C. Lei, M. Dressel, E. Uykur
Summary: In this study, temperature-dependent reflectivity studies were conducted on two different magnetic order samples of rare-earth kagome metals. Peculiar optical spectra were observed, and changes in phonon mode at different temperatures were found. The results reveal an unusual interplay between two features.
Article
Materials Science, Multidisciplinary
M. Wenzel, B. R. Ortiz, S. D. Wilson, M. Dressel, A. A. Tsirlin, E. Uykur
Summary: Temperature-dependent reflectivity studies have been conducted on the nonmagnetic kagome metal RbV3Sb5, revealing the spectral characteristics in a broad energy range. The observations indicate the formation of charge-density wave and the significance of electron-phonon coupling.
Article
Physics, Multidisciplinary
Y. T. Chan, E. Uykur, M. A. Belyanchikov, M. Dressel, V. A. Abalmasov, V Thomas, E. S. Zhukova, B. Gorshunov
Summary: In this study, the real part of the dielectric constant of beryl crystals filled with heavy water molecules in nanosized cages was measured, and the effects of temperature and pressure on its properties were investigated. The results showed that pressure had a significant influence on the behavior of the dielectric constant with temperature, and increasing pressure suppressed the low-temperature quantum effects. Furthermore, it was observed that the azimuthal tunneling effect of the water molecules was enhanced within a certain pressure range, and as the pressure increased further, the azimuthal tunneling effect became stable. Finally, it was found that pressure affected the ordering tendency of the water dipoles.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
Maximilian Gill, Bruno Gompf, Martin Dressel, Gabriel Schnoering
Summary: In this study, the relationship between optical transport and depolarization is experimentally confirmed and quantified, providing a simple relation for predicting the evolution rate of depolarization in strongly scattering media. This research has implications for the understanding of the connection between light diffusion and measurable polarization signatures.
