Article
Chemistry, Multidisciplinary
A. I. Pogodin, M. J. Filep, V. Yu. Izai, O. P. Kokhan, P. Kus
Summary: Single crystals of ternary argyrodites Ag7PS6 and Ag8GeS6 were grown from the melt by the method of directional crystallization. The crystal structures and electrical properties of these crystals were investigated.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Rajath Alexander, Amit Kaushal, Avik Das, Jitendra Bahadur, Kinshuk Dasgupta
Summary: Floating catalyst chemical vapor deposition (FC-CVD) can be used to synthesize CNT fiber, and adjusting the carrier gas flow rate can improve the microstructure and properties, such as density and electrical conductivity, of the CNT fiber.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Mechanical
Javier A. Ortega, Md Abu Sayeed Biswas, M. D. Mashfiqur Rahman, Victoria Martinez, Laura Pena-Paras, Demofilo Maldonado-Cortes
Summary: This study investigates the lubrication performance of corn and peanut oils reinforced with different concentrations of Halloysite clay nanotubes (HNTs) and Montmorillonite nanoclay (MMT) as green lubricant additives. The tribological results revealed that the coefficient of friction (COF) and wear volume loss were significantly reduced when using HNT and MMT NPs as lubricant additives. The authors conclude that vegetable oils reinforced with HNT and MMT nanoclays have the potential to be used as good biodegradable nanolubricants.
Article
Engineering, Mechanical
Jinwan Yang, Yuyang Yuan, Ke Li, Tobias Amann, Chun Wang, Chengqing Yuan, Anne Neville
Summary: The study demonstrates that EPND is a promising additive for nematic liquid crystal lubricants, showing potential to reduce surface energy of steel and promote homeotropic alignment of 5CB, leading to excellent lubrication performance, especially in applications with high requirements for low friction.
Article
Chemistry, Multidisciplinary
Hiroyuki Muto, Yusaku Sato, Wai Kian Tan, Atsushi Yokoi, Go Kawamura, Atsunori Matsuda
Summary: This study demonstrates the controlled incorporation of carbon nanotubes (CNT) with alumina and zirconia nanoparticles using an electrostatic nano-assembly method, resulting in the fabrication of homogeneous composite granules. The spark-plasma-sintered composite granules exhibited significantly higher electrical conductivity compared to a homogeneous composite artifact. This novel fabrication method using electrostatic integrated assembly shows potential for the development of multiscale and multicomponent composite materials.
Article
Chemistry, Multidisciplinary
Abhinav Lal, Himanshu Verma, Saikumar Chirra, Ravindra Dhar, Roman Dabrowski, Kusum Lata Pandey
Summary: This study disperses gold nanorods (GNRs) in nematic liquid crystalline materials and investigates the effect of GNRs on the morphology and anisotropic physical properties of 6CHBT (a nematic liquid crystalline material) through calorimetric, texture, spectroscopic, and dielectric studies.
Article
Engineering, Electrical & Electronic
Solanky Das, Dhananjoy Mondal, Souravi Bardhan, Shubham Roy, Dipak Kr Chanda, Anupam Maity, Subhojit Dutta, Kamalakanta Mukherjee, Kaustuv Das
Summary: This article reports the size fractionation of natural clay kaolinite for the fabrication of a cost-effective green separator material for energy storage devices. The nano-clay exhibits enhanced porosity, surface area, and dielectric constant, making it a promising material for energy storage applications. It shows high specific capacitance and slow electrical discharge rate, indicating its good separator and storage properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Chemistry, Physical
Chun Zhang, Hui Li, Yalong Liu, Pengcheng Li, Siqi Liu, Chaobin He
Summary: This review summarizes recent advances in PANI/CNTs composites, including dispersion methods of CNTs, fabrication engineering, post-treatments, and multi-components composites. Various approaches are comprehensively discussed to illustrate the microstructure modulation and conduction mechanism within PANI/CNTs composites, and future prospects are given.
Article
Materials Science, Ceramics
Kyeong Eun Song, Harald Schlegl, Chan Gyu Kim, Ki Sang Baek, Yu Ri Lim, Jung Hyun Nam, Hyun Suk Kim, Jung Hyun Kim
Summary: The electrical conductivity characteristics of SmBaCo2O5+d (SBCO) and SmBa0.5Sr0.5Co2O5+d (SBSCO) were studied by changing the microstructure characteristics. SBCO and SBSCO with dense microstructure showed different conductivity behaviors, while the porous cathode showed high semiconductor conductivity. The porous cathode exhibited higher conductivity when the measurement temperature was decreased.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Ye Wang, Ya-Nan Gao, Tian-Ning Yue, Xu-Dong Chen, Ming Wang
Summary: In this study, multi-walled carbon nanotube-filled polydimethylsiloxane (CNT/PDMS) composites with high-performance and tunable microwave shielding were prepared by incorporating liquid metals (LMs). The composites exhibited high absorption loss and low reflection loss, effectively reducing secondary microwave pollution. The microwave shielding performance of the composites containing LMs could be regulated by compression.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tonoy K. Mondal, J. Hunter West, Stuart J. Williams
Summary: By using conductive carbon nanofiber mats, large-scale trapping of nanoparticles can be achieved to overcome Brownian transport. This method is cost-effective compared to traditional cleanroom procedures and can serve as a foundation for microscale electrokinetic devices.
Article
Engineering, Chemical
Canqun Liu, Xiaosong Zhou, Xunfu Zhou, Wenke Ruan, Zhijun Wu
Summary: This study synthesized 4-Cyano-4 '-n-octyl biphenyl (8OCB) to modify carbon nanotubes and create high thermal conductivity materials. The results showed that the 8OCB liquid crystal improved the dispersion of carbon nanotubes in silicone composites, and applying an electric field further enhanced the thermal conductivity of the materials.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yu Olenych, I. B. Olenych, Yu Yu Horbenko, O. Aksimentyeva, I. D. Karbovnyk, B. R. Tsizh
Summary: This study investigates the possibility of controlling the conductivity of a percolation system through the application of an electric field. Computer simulations and experimental measurements were conducted on a liquid crystal-carbon nanotube nanocomposite to study its electrical characteristics. The results show that the electrical resistance of the nanocomposite decreases with increasing nanotube concentration. Applying a voltage reduces the resistance of the nanocomposite, which is likely due to changes in the spatial orientation of the nanotubes. Computer simulations also revealed that the concentration and orientation of the nanotubes affect the percolation processes in the carbon nanotube system.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Review
Chemistry, Multidisciplinary
Rijia Lin, Milton Chai, Yinghong Zhou, Vicki Chen, Thomas D. Bennett, Jingwei Hou
Summary: The melting phenomenon in metal-organic frameworks (MOFs) is recognized as a typical characteristic of the fourth generation MOFs. Molten MOFs can be processed into mechanically robust glassy MOF macrostructures and can also be combined with other functional materials, such as crystalline MOFs, inorganic glass, and metal halide perovskites, to achieve highly tunable interfacial characteristics. MOF glass composites have emerged as a family of functional materials with dynamic properties and hierarchical structural control, enabling the fabrication of advanced separation, catalysis, optical, and biomedical devices. In this review, we discuss the approaches for designing, fabricating, and characterizing MOF glass composites, and identify key application opportunities and remaining challenges in terms of thermal and chemical compatibility, interfacial properties, and scalability.
CHEMICAL SOCIETY REVIEWS
(2023)
Review
Materials Science, Characterization & Testing
Seyed Rasoul Mousavi, Sara Estaji, Hediyeh Kiaei, Mohammad Mansourian-Tabaei, Sasan Nouranian, Seyed Hassan Jafari, Holger Ruckdaeschel, Mohammad Arjmand, Hossein Ali Khonakdar
Summary: This article provides an overview of the recent advances in research on improving the thermal and electrical conductivities of EP resin systems modified with CNT, Gr, their derivatives, and hybrids. Surface modification of these reinforcements is also discussed as a means to enhance the dispersion of nanofillers in EP resins.
Article
Biotechnology & Applied Microbiology
Caiyun Liu, Nabil Grimi, Olivier Bals, Nikolai Lebovka, Eugene Vorobiev
Summary: This study examined the effects of PEF treatment and VD on freezing processes for potato tissue, revealing that PEF treatment and VD can accelerate dehydration, while the combination of VD and FD facilitates the rehydration of deeply dried potatoes, aiding in the control of product quality.
FOOD AND BIOPRODUCTS PROCESSING
(2021)
Article
Optics
T. Bezrodna, V. Bezrodnyi, A. M. Negriyko, L. F. Kosyanchuk
Summary: This study investigated the effects of solvents with different physical parameters on the spectral, photophysical, lasing properties, and molecule associations of Rhodamine dyes in polyurethane acrylate matrix. It was found that solvent polarity significantly influences the dye luminescence, photostability, and aggregation processes in the polymer matrices. The use of highly polar solvents improved the photostability and generation parameters of the laser dye-doped solid-state active elements.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Nikolai Lebovka, Olena Goncharuk, Valeriy Klepko, Viacheslav Mykhailyk, Yurii Samchenko, Lyudmila Kernosenko, Natalya Pasmurtseva, Tetiana Poltoratska, Olena Siryk, Olena Solovieva, Mykhailo Tatochenko
Summary: This study investigated the effects of acid activation on the structure and properties of Laponite RD nanoparticles and the properties of polyNIPAAm hydrogels cross-linked by the activated nanoparticles. The results showed that acid activation resulted in the destruction of the crystal lattice of Laponite, leaching of magnesium and lithium, and formation of amorphous phases. Additionally, acid activation significantly influenced the aggregation and surface charges of the activated nanoparticles in aqueous suspension.
Article
Chemistry, Multidisciplinary
L. Kosyanchuk, T. Bezrodna, O. Antonenko, V. Bezrodnyi, A. Negriyko, O. Brovko
Summary: In this study, covalent bonding between Rhodamine B xanthene dye and polyurethanes with different isocyanate fragments was achieved and investigated. The effects of different polyurethane isocyanate components on the spectral properties of Rhodamine B were studied and discussed. The spectral, photophysical, and lasing characteristics of Rhodamine B dye incorporated into the polyurethane matrices were presented.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2022)
Article
Chemistry, Multidisciplinary
T. V. Bezrodna, A. A. Ishchenko, L. F. Kosyanchuk, N. A. Derevyanko, O. I. Antonenko, V. I. Bezrodnyi
Summary: The luminescence spectral properties of two symmetrical indocyanine dyes with different substituents near nitrogen atoms were investigated in polyurethane matrices. The possibility of covalent bonding between the indocyanine dye and polyurethane was shown through analysis of IR spectra, which measured the reaction product between an indolenine salt and phenyl isocyanate, as well as the individual compounds of the salt and isocyanate.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2022)
Article
Chemistry, Multidisciplinary
T. Bezrodna, G. Klishevich, V. Melnyk, M. Nesprava, O. Roshchin, N. Curmei, J. Baran, M. Drozd
Summary: The study examined the impact of the 5CB liquid crystal cooling rate on its luminescence spectra at low temperature, focusing on two types of nanocomposites doped with different nanoparticles. Results demonstrated a significant influence of the cooling rate on the structure of 5CB liquid crystal and its luminescence spectra.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2022)
Article
Chemistry, Multidisciplinary
Nataly Kozak, Ludmila Kosyanchuk, Tamara Bezrodna, Volodymyr Bezrodnyi, Oksana Antonenko
Summary: This study analyzed the effects of phenalenone dyes on the radiation resistance of solid-state laser active elements in polyurethane matrices. The results showed minimal changes in the dynamic characteristics of the materials, but the gas permeability of the polymer matrices varied depending on the dye structure, polyurethane, and chemical interactions.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2022)
Article
Optics
Tamara Bezrodna, Volodymyr Bezrodnyi, Alexander Ishchenko, Yurii Slominskii, Illia Sharanov
Summary: The spectral and nonlinear optical properties of new tricarbocyanine dyes, which are derivatives of benzo[cd]indole and absorb efficiently in the wavelength range of 1.05-1.08 μm, have been studied. Based on these dyes, passive Q-switches in liquid (ethanol solutions) and polymer (triplexes with dye-doped polyurethane films between optical glass substrates) forms have been developed for neodymium lasers. The Q-switches exhibit 100% modulation depth in generating ultrashort pulse trains and demonstrate a highly stable regime of passive mode-locking. Comparisons with existing analogues based on organic dyes, nanotubes, graphene, inorganic semiconductors, mirrors (SESAM), LiF:F-2(-), and Cr4+:YAG have shown advantages of the new Q-switches.
Article
Chemistry, Physical
M. Petryk, I. Boyko, J. Fraissard, N. Lebovka
Summary: This paper theoretically considers the non-isothermal adsorption/desorption of gas in a cylindrical column filled with adsorbent particles. The model is based on Langmuir theory for equilibrium adsorption. Using the Heaviside operational method, analytical solutions for the kinetics of changes in the concentration of adsorbate in the inter- and intra-particle spaces were obtained. Numerical calculations were conducted for gas adsorption at different temperatures of the gas flow, followed by desorption by the flow of inert gas through the column. The results revealed complex interrelations between the spatial-temporal dependencies in the distribution of concentrations of adsorbed gas inside the adsorption column and the temperatures of the inlet gas.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2023)
Article
Physics, Applied
T. Bezrodna, V. Nesprava, V. Melnyk, G. Klishevich, N. Curmei, T. Gavrilko, O. Roshchin, J. Baran, M. Drozd
Summary: The conformation and structure alignment of the 4-pentyl-4'-cyanobiphenyl (5CB) molecule were investigated using temperature variable Fourier transform infrared (FTIR) and photoluminescence (PL) spectroscopy. The study covered a wide temperature range and different phases of 5CB. The observed changes in the FTIR absorption and PL emission bands indicated the presence of dipolar association and two types of dimeric structures in the planar configuration of 5CB.
LOW TEMPERATURE PHYSICS
(2023)
Review
Biochemistry & Molecular Biology
Adila Gherabli, Nabil Grimi, Julien Lemaire, Eugene Vorobiev, Nikolai Lebovka
Summary: The freshwater microalga Haematococcus pluvialis is a cell factory for natural astaxanthin, with 4-7% of its total dry weight composed of astaxanthin. The bioaccumulation of astaxanthin in H. pluvialis cysts is a complex process dependent on different stress conditions during cultivation. This review analyzes the various steps in H. pluvialis' processing, including cultivation, biomass harvesting, cell disruption, extraction, and purification techniques. It also collects information on cell structure, biomolecular composition, properties, and the bioactivity of astaxanthin in H. pluvialis, with special emphasis on the recent progress in applying electrotechnologies for growth and biomolecule recovery.
Article
Physics, Multidisciplinary
Igor Boyko, Mykhaylo Petryk, Nikolai Lebovka
Summary: The Lewis-Riesenfeld method is used to study electron tunneling transport in open nitride nanosystems. The solutions of the time-dependent Schrodinger equation are represented as a linear combination of Fresnel integrals. Calculations of the transparency coefficient D(E) reveal the main factors affecting the electron tunneling process, and oscillations with significant distortions and destruction of quasi-stationary states are observed at certain parameter values.
Article
Physics, Fluids & Plasmas
Nikolai Lebovka, Mykhaylo Petryk, Eugene Vorobiev
Summary: A two-dimensional Monte Carlo simulation of dead-end diafiltration of bidispersed particle suspensions was conducted. It was found that there are complete and incomplete separation regimes during the diafiltration process, with filtration and diffusion-driven stratification of particles observed in the vertical direction.
Article
Physics, Fluids & Plasmas
Nikolai Lebovka, Mykhailo O. Tatochenko, Nikolai V. Vygornitskii, Yuri Yu Tarasevich
Summary: The relaxation process of packed elongated particles aligned on a line was studied, with the aspect ratio affecting the kinetics of relaxation and the distribution of distances between nearest-neighbor particles. The transport properties of the resulting systems were also analyzed, revealing anomalous diffusion depending on the aspect ratio in the relaxed states.
Article
Physics, Fluids & Plasmas
Nikolai I. Lebovka, Mykhailo O. Tatochenko, Nikolai V. Vygornitskii, Yuri Yu. Tarasevich
Summary: The behavior of a system of two-dimensional elongated particles packed in a slit between two parallel walls was analyzed through simulation. The results indicate that the aspect ratio and distance between the walls significantly affect the structure of the packings and percolation connectivity.
