Article
Chemistry, Physical
Xiaopeng Yang, Duo Zhao
Summary: This study investigates the compound of magnetic element Ni with single wall carbon nanotubes using density functional theory. The results show selective adsorption interactions with reducing gases, significant changes in electrical conductivity, and high research potential for sensitive detection of dangerous reducing gases and high-efficiency catalytic materials.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Christopher M. Sims, Jeffrey A. Fagan
Summary: This research quantitatively determined the effects of surfactant chemistry and polymer chain length on the extraction of specific single-wall carbon nanotube (SWCNT) species in an aqueous two-polymer phase extraction (ATPE) separation. The results showed that alkyl surfactant tail length strongly affects the amount of surfactant necessary for extraction in ATPE. Substitution of different bile salts results in different surfactant packings on the SWCNTs, significantly affecting the concentrations required for extraction.
Article
Materials Science, Multidisciplinary
H. Yurtseven, E. Kilit Dogan
Summary: The study investigates the magnetic, thermal, and ferroelectric properties of MOFs, specifically the compounds CH3NH2NH2M(HCOO)(3) (MHyM) with M = Fe and Mn, near phase transitions. Utilizing molecular field theory, Ising compressible model, and power-law formula, satisfactory and acceptable results are obtained from the analysis of experimental data for magnetization, heat capacity, and spontaneous polarization, respectively.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
S. Ghosh, C. Lane, F. Ronning, E. D. Bauer, J. D. Thompson, J. -X. Zhu, P. F. S. Rosa, S. M. Thomas
Summary: This study reports the discovery of a colossal piezoresistance in Eu5In2Sb6 single crystals, where anisotropic metallic clusters naturally form within a semiconducting matrix due to electronic interactions. The highly anisotropic piezoresistance of Eu5In2Sb6 shows a resistivity drop of > 99.95% under uniaxial pressure along [001], resulting in a colossal piezoresistance factor of 5000 Chi 10(-11) Pa-1. This finding not only reveals the role of interactions and phase separation in achieving colossal piezoresistance, but also suggests a pathway for the development of multifunctional devices with large responses to both pressure and magnetic field.
Article
Multidisciplinary Sciences
Daisuke Yamamoto, Takahiro Sakurai, Ryosuke Okuto, Susumu Okubo, Hitoshi Ohta, Hidekazu Tanaka, Yoshiya Uwatoko
Summary: The study proposes and demonstrates a method for actively controlling the classical-quantum crossover in magnetic insulators by applying external pressure, showing evolution of magnetization process from semi-classical to highly-quantum regime in CsCuCl3. By compressing spin chains to alter the value of local spin quantum number in a two-dimensional model, quantum correlations are characterized and the tunable classical-quantum crossover of two-dimensional spin systems is accessed.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Song Li, Zhaohui Jin, Xiaoguo Gong, Hua Huang, Shaokang Guan, Guangyin Yuan
Summary: Mg-Sc alloys with less than 25 atomic percent Sc exhibit shape memory effects, and the martensitic transformation temperature can be elevated by tuning the chemical ordering and microstructure of Mg-Sc precipitates. Increased ground-state energy difference and decreased vibra-tional free energy difference between austenite and martensite contribute mainly to the stabilized phase transformations.
Article
Chemistry, Physical
Cuizhen Wang, Lingyan Zhang, Guangzhu Zhou, Jun Qiu, Yin Liu, Rongchao Yang, Jingyi Chi, Jinpu Wang
Summary: A novel reusable ion imprinted nanocomposite magnetic bentonite (IIPNMB) was synthesized for selective recovery of aqueous scandium. The IIPNMB exhibited excellent adsorption performance, fitting well with pseudo second-order kinetic model and Langmuir model. Electrostatic interaction and complexation between the amino, hydroxyl, P@O, and PAO bonds of the adsorbents and Sc(III) contributed to the high selectivity of IIPNMB. The proposed atomic structure of IIPNMB was further supported by DFT calculation, confirming the stable adsorption process and providing additional evidence for the mechanism of selective extraction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Omar A. Saleh, Sam Wilken, Todd M. Squires, Tim Liedl
Summary: This study investigates the dynamics of dilute internal inclusions, called vacuoles, within liquid droplets of DNA nanostar particles. The researchers observe appearance, growth, and bursting of the vacuoles, and find that their growth follows a linear relationship with time. The vacuoles burst when they reach the droplet interface, causing droplet motion due to osmotic pressure. A diffusion-based model is developed to explain these behaviors quantitatively.
NATURE COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Rita Kallio, Pekka Tanskanen, Saija Luukkanen
Summary: Scandium is classified as a critical raw material by the European Union and research is being conducted on its beneficiation from various sources. The recently discovered Kiviniemi Sc deposit in Finland has significant resources and high grade. Magnetic separation is found to be an effective method for concentrating scandium ores.
Article
Chemistry, Physical
Ngo Thi Lan, Nguyen Thi Mai, Duong Duc La, Nguyen Minh Tam, Son Tung Ngo, Ngo Tuan Cuong, Nguyen Van Dang, Thu Thi Phung, Nguyen Thanh Tung
Summary: By doping the Au-10(2+) cluster with 3d transition metal atoms, the study explores superatomic clusters as analogues of more complex molecules. It is found that Au9M2+ exhibits different structural evolution patterns and stable magnetic behavior.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Pharmacology & Pharmacy
Adrian Krummnow, Andreas Danzer, Kristin Voges, Stefanie Dohrn, Samuel O. Kyeremateng, Matthias Degenhardt, Gabriele Sadowski
Summary: This study provides a thermodynamic analysis of the release mechanism of amorphous solid dispersions (ASDs) composed of ritonavir and poly(vinylpyrrolidone-co-vinyl acetate). The observed release behavior is explained based on the quantitative thermodynamic phase diagram predicted by PC-SAFT. Liquid-liquid phase separation in the dissolution medium and amorphous phase separation in the ASD are linked back to the same thermodynamic origin, and they occur simultaneously in the investigated system.
Article
Chemistry, Applied
Junhui Xiao, Kai Zou, Nanlan Zhong, Deqiang Gao
Summary: In this study, the separation of iron and scandium from Sc-bearing red mud was investigated. The red mud contained 31.11 wt% total iron (TFe), 0.0045 wt% Sc, and hematite and ferrosilite as the main Fe-bearing minerals. By applying a novel deep reduction roasting and magnetic separation process with the addition of coke and CaO, iron was extracted and scandium was enriched from the Sc-bearing red mud. The test results showed high Fe recovery of 92.96% and Sc recovery of 98.65%.
JOURNAL OF RARE EARTHS
(2023)
Article
Physics, Condensed Matter
Wanfei Shan, Weidong Luo
Summary: In this study, a new series of AFM metals is predicted in (CrO2)(m)/(TaO2)(n) superlattices, and the interface-induced magnetic phenomena are investigated. The magnetic exchange interaction in the AFM semiconducting phases is systematically discussed, and the mechanisms of AFM metallic phases are revealed. This work provides new insights about realizing and manipulating AFM metals in artificial superlattices or heterostructures.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
S. B. Wang, C. F. Pan, B. Wei, X. Zheng, Y. X. Lai, J. H. Chen
Summary: This study revealed the microstructural differences between Sc-added and Sc-free Al-Mg-Si-Sc alloys using atomic-scale transmission electron microscopy and atomic-resolution spectroscopy. The addition of Sc atoms not only accelerates the initial stage of hardening but also improves the stability of transitional precipitates, leading to finer and longer precipitate needles. The thermal stability of the alloy is greatly enhanced by the addition of Sc.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Zhiping Zhang, Yuenan Wang, Hongfei Liu, Wei Wang
Summary: Al2Mo3O12 is a typical negative thermal expansion material, and its thermal expansion behavior depends on crystal phase, with thermal shock caused by temperature-induced phase transition being a limiting factor. A-site cation substitution is found to be a more effective way to tune the thermal expansion properties of Al2Mo3O12.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
H. Mbarak, S. M. Hamidi, V. I. Belotelov, A. I. Chernov, E. Mohajerani, Y. Zaatar
Summary: This work demonstrates a 2D magneto-plasmonic grating structure combining ferromagnetic and plasmonic materials, allowing for active control of plasmonic characteristics through magnetization switching. By coupling plasmons with magneto-optical active materials, a new path in the development of active plasmonic devices is opened, with a response time estimated to be in the range of microseconds.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hong En Lim, Yusuke Nakanishi, Zheng Liu, Jiang Pu, Mina Maruyama, Takahiko Endo, Chisato Ando, Hiroshi Shimizu, Kazuhiro Yanagi, Susumu Okada, Taishi Takenobu, Yasumitsu Miyata
Summary: This study successfully demonstrates the wafer-scale synthesis of highly crystalline transition-metal telluride nanowires by chemical vapor deposition, which exhibit superior conducting properties and anisotropic 1D optical response.
Article
Physics, Applied
Yohei Yomogida, Mai Nagano, Hiromu Hamasaki, Kaori Hirahara, Yasumitsu Miyata, Kazuhiro Yanagi
Summary: In this study, WTe2 nanowires with diameters of 15-50 nm were successfully synthesized via tellurization method. It was also discovered that sulfurization and selenization reactions result in nanotube structures.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Daria O. Ignatyeva, Grigory A. Knyazev, Andrey N. Kalish, Alexander Chernov, Vladimir Belotelov
Summary: A magnetometer based on magnetic iron garnet film was proposed, which achieved enhanced magneto-optical response by using a dielectric resonant grating on top of an ultrathin film. This magnetometer can measure all three spatial components of the magnetic field simultaneously with high spatial resolution and sensitivity up to 100 pT Hz(-1/2).
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Boris Senkovskiy, Alexey Nenashev, Seyed K. Alavi, Yannic Falke, Martin Hell, Pantelis Bampoulis, Dmitry Rybkovskiy, Dmitry Yu Usachov, Alexander Fedorov, Alexander Chernov, Florian Gebhard, Klaus Meerholz, Dirk Hertel, Masashi Arita, Taichi Okuda, Koji Miyamoto, Kenya Shimada, Felix R. Fischer, Thomas Michely, Sergei D. Baranovskii, Klas Lindfors, Thomas Szkopek, Alexander Grueneis
Summary: The study synthesized a monolayer of graphene nanoribbons with multiple aligned heterojunctions, and characterized them using various methods, showing that charge transport is controlled by potential barriers formed by wide-bandgap GNR segments.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Wenyu Yuan, Kan Ueji, Takashi Yagi, Takahiko Endo, Hong En Lim, Yasumitsu Miyata, Yohei Yomogida, Kazuhiro Yanagi
Summary: Our study demonstrates that interfacial engineering is an efficient strategy to tune thermal transport, and the vertically stacked MoSe2-MoS2-MoSe2-MoS2 heterostructure shows the lowest thermal conductance. The roles of various interfacial effects on heat flow are revealed, highlighting the importance of interfacial mismatch and coupling effects in thermal transport. The design principle also has promising applications in other areas such as electrical and thermoelectric tuning.
Article
Chemistry, Physical
Stefano Dal Forno, Natsumi Komatsu, Michael Wais, Ali Mojibpour, Indrajit Wadgaonkar, Saunab Ghosh, Yohei Yomogida, Kazuhiro Yanagi, Karsten Held, Junichiro Kono, Marco Battiato
Summary: The study investigates excitonic effects in 1D semiconductors, revealing that the Sommerfeld factor is less than 1 in such systems while it is greater than 1 in 2D and 3D systems. Using a theoretical model, the absorption spectra of carbon nanotube films were fitted, uncovering the mechanism behind background absorption.
Article
Chemistry, Multidisciplinary
Yong Hu, Taishan Zhu, Zipeng Guo, Henna Popli, Hans Malissa, Yulong Huang, Lu An, Zheng Li, Jason N. Armstrong, Christoph Boehme, Z. Valy Vardeny, Alpha T. N'Diaye, Chi Zhou, Manfred Wuttig, Jeffrey C. Grossman, Shenqiang Ren
Summary: This study presents a rapid prototyping and stabilizing strategy for high-Tc molecular magnets, allowing for dynamic and nonvolatile magnetization control. The printed molecular magnets exhibit excellent thermal stability and durability, as well as tunability of magnetic exchange interactions, enabling a wide range of working temperatures.
Article
Chemistry, Multidisciplinary
Denis M. Krichevsky, Lei Shi, Vladimir S. Baturin, Dmitry Rybkovsky, Yangliu Wu, Pavel Fedotov, Elena D. Obraztsova, Pavel O. Kapralov, Polina Shilina, Kayleigh Fung, Craig T. Stoppiello, Vladimir Belotelov, Andrei Khlobystov, Alexander Chernov
Summary: Molecular magnetism and magnetic molecules have received attention for their importance in quantum technologies, information processing, and spintronics. Researchers have synthesized cobalt-phthalocyanine based nanoribbons encapsulated in SWCNTs, confirming their properties using various techniques and observing magnetic differences. This approach is expected to provide a diverse class of protected low-dimensional ordered magnetic materials for various applications.
Article
Physics, Applied
N. G. Pugach, D. M. Heim, D. Seleznev, A. Chernov, D. Menzel
Summary: We propose a superconducting spin valve based on a Josephson junction with B20-family magnetic metal as a barrier material. By reorienting the magnetization of the spiral magnet, the states of this device can be switched, which strongly influences the critical Josephson current. Compared to previous superconducting spin valves, our device is easier to fabricate and control, has a stable ground state, and is compatible with low-T Josephson electronics.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Yohei Yomogida, Kanako Horiuchi, Ryotaro Okada, Hideki Kawai, Yota Ichinose, Hiroyuki Nishidome, Kan Ueji, Natsumi Komatsu, Weilu Gao, Junichiro Kono, Kazuhiro Yanagi
Summary: The presence of hopping carriers and grain boundaries can lead to anomalous carrier types and density overestimation in Hall-effect measurements. This study systematically investigated the validity of Hall-effect results for different types of single-wall carbon nanotube films and found that while the Hall carrier types were always correct, the Hall carrier densities were overestimated by up to four orders of magnitude. This significant overestimation indicates that thin films of one-dimensional SWCNTs are quite different from conventional hopping transport systems.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Vasily Kravtsov, Tatiana Ivanova, Artem N. Abramov, Polina Shilina, Pavel O. Kapralov, Dmitry N. Krizhanovskii, Vladimir N. Berzhansky, Vladimir Belotelov, Ivan A. Shelykh, Alexander Chernov, Ivan Iorsh
Summary: Interfacing atomically thin van der Waals semiconductors with magnetic substrates provides additional control on their intrinsic valley degree of freedom. The results of this study establish monolayer MoSe2 interfaced with ferrimagnetic bismuth iron garnet as a promising system for valley control of charged excitons.
Article
Physics, Applied
A. A. Kolosvetov, M. A. Kozhaev, I. V. Savochkin, V. I. Belotelov, A. I. Chernov
Summary: This study presents the concept of optomagnonic logic gate, which utilizes the interference of spin waves generated by femtosecond laser pulses in a bismuth-substituted yttrium iron garnet film for logic operations. By controlling the overall spin-wave distribution using a spatial light modulator, the experimental optical excitation of a magnon logical gate (XNOR) based on optically excited spin-wave interference is successfully demonstrated and analyzed through wavelet analysis and micromagnetic numeric simulations.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Georgy A. A. Ermolaev, Ying Xie, Liu Qian, Mikhail K. K. Tatmyshevskiy, Aleksandr S. S. Slavich, Aleksey V. V. Arsenin, Jin Zhang, Valentyn S. S. Volkov, Alexander I. I. Chernov
Summary: This article presents the first measurement of the anisotropic optical constants of monolayer aligned SWCNTs, revealing a large birefringence and high dichroism. The optical response of aligned SWCNTs monolayer can be described by an effective medium approximation using the graphene dielectric function. It also provides a universal approach for determining the carbon concentration in nanotube structures.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
A. Kuzikova, L. A. Shelukhin, F. M. Maksimov, A. I. Chernov, R. Pisarev, A. M. Kalashnikova
Summary: We report on the laser-induced spin reorientation and Verwey phase transitions in a single crystalline ferrimagnetic magnetite Fe3O4 using femtosecond optical and magneto-optical pump-probe techniques. By defining the range of initial sample temperatures and laser fluences, we observe partial or complete photo-induced phase transitions from a monoclinic insulating to a cubic metallic state, along with the switching of magnetic anisotropy. We also uncover the presence of laser-induced phase transition domains below the established threshold fluence and even when the material is initially in the cubic phase, demonstrating the first-order nature of these transitions beyond thermodynamic equilibrium.
