Article
Materials Science, Ceramics
S. V. Rempel, D. A. Eselevich, H. Schroettner, A. A. Valeeva, A. A. Rempel
Summary: The study investigated the structural and thermal behavior of TiOy/HAp nanocomposite materials used in tissue engineering through various analysis methods. It was found that the TiOy additives have a stabilizing effect on HAp composites, with different stoichiometries impacting the interactions between the matrix and nanoparticles.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Leila Vatandoust, Ali Habibi, Hamid Naghshara, Sajedeh Mohammadi Aref
Summary: In this study, nanostructured ZnO films were prepared by depositing a Zn thin film on a quartz substrate and synthesizing ZnO nanoparticles through thermal oxidation. TiO1.5/ZnO nanosensors were successfully fabricated and exhibited significantly improved sensitivity to CH4 and CO gases, as well as better response and stability compared to previous ZnO-based sensors.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Maamon A. Farea, Gita B. Bhanuse, Hamed Y. Mohammed, Mohammed O. Farea, Mohyeddine Sallam, Sumedh M. Shirsat, Meng-Lin Tsai, Mahendra D. Shirsat
Summary: An ultra-high sensitive and selective carbon monoxide (CO) gas sensor was developed using PPy/TiO2 nanocomposite. Compared to the pure PPy sensor, the PPy/TiO2 sensor exhibited a 4-fold enhanced sensitivity with high selectivity. The inclusion of TiO2 in PPy plays a crucial role in improving the performance of the gas sensor.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Gargi Shankar Nayak, Adele Carrado, Patrick Masson, Genevieve Pourroy, Flavien Mouillard, Veronique Migonney, Celine Falentin-Daudre, Caroline Pereira, Heinz Palkowski
Summary: The field of biomaterials is constantly evolving, with composite materials being a leading area of research for biomedical applications. Metal-based composites show promise for hard tissue applications, combining the mechanical properties of metals with the beneficial properties of bioceramics/polymer.
Article
Materials Science, Multidisciplinary
Pradhyut Rajkumar, Bimal K. Sarma
Summary: A biomimetic method was used to produce HAp, Mg-/Zn-doped HAp, and HAp-ZnO nanocomposite with different morphologies and structures by controlling reaction conditions and ion components. Incorporation of Mg and Zn had a significant impact on the lattice structure of HAp, leading to the formation of different nanocrystal structures.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Y. F. Zhang, W. Q. Yan, L. Chen, B. Liao, Q. S. Hua, X. Zhang
Summary: The CrAlSiN nanocomposite coatings prepared in the study exhibited high hardness and toughness, with refined grain size and well-defined nanocrystalline/amorphous phase separation.
SURFACES AND INTERFACES
(2021)
Article
Biophysics
Zheng Wang, Li Mei, Xinqiang Liu, Qihui Zhou
Summary: Hierarchically hybrid biocoatings on Ti implants are developed in this study by incorporating polydopamine, ZnO nanoparticles, and chitosan/nanocrystal hydroxyapatite. These coatings enhance antibacterial activity and osteogenesis, offering a promising alternative for developing Ti implants with long-lifetime bioactivity.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Nasser S. Awwad, Emad M. Eed, Ahmad El Askary, Hala A. Ibrahium, Moustapha E. Moustapha, M. K. Ahmed
Summary: Developing bioceramics-based nanomaterials for scaffolding is still a challenge. In this study, a nanocomposite combining hydroxyapatite, hematite, and graphene oxide is fabricated to achieve antibacterial properties and improved mechanical properties. The nanocomposite exhibits enhanced surface roughness, increased microhardness, and enhanced antibacterial properties against Escherichia coli and Staphylococcus aureus.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Industrial
Xing Zhang, Dian Li, Yufeng Zheng, Pouya Shojaei, Mohamed Trabia, Brendan O'Toole, Dong Lin, Leslie Mushongera, Yiliang Liao
Summary: This study successfully achieved the in-situ fabrication of nano-Ti5Si3 reinforced TMNC coatings using a nanoparticle-mediated approach. The optimized TMNC showed crack-free and ultrahigh strength characteristics, with significant improvements in surface microhardness, indentation modulus, indentation yield strength, and wear rate.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yang Zhou, Fang Yang, Cunguang Chen, Yanru Shao, Boxin Lu, Yanli Sui, Zhimeng Guo
Summary: High-plasticity in-situ TiB/Ti matrix composites with uniform microstructure and grain refinement were fabricated by vacuum sintering and hot rolling. The Ti-2.0 wt% ZrB2 composite exhibited outstanding mechanical properties, attributed to grain refinement and dominant role of dislocation substructure hardening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
R. Moriche, A. M. Beltran, B. Begines, J. A. Rodriguez-Ortiz, A. Alcudia, Y. Torres
Summary: This study investigated the equilibrium among adherence, micro-mechanical properties, and coating bioactivity of bioactive glasses on porous titanium substrates for bone tissue implants. Porous samples resulted in decreased micro-hardness and elastic modulus, closer to human bone values, with beneficial effects on coating integration. Bioglass 1393 showed better pore infiltration capacity while 45S5 exhibited higher bioactivity.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
D. A. Angel, T. Miko, F. Kristaly, M. Benke, Z. Gacsi
Summary: This study fabricated titanium monoboride whisker-reinforced titanium matrix composites using powder metallurgy and vacuum sintering techniques, with the addition of nanocrystalline Ti to enhance the transformation mechanism. The results showed that the hybrid composites exhibited improved yield strength and hardness.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Elzbieta Pietrzykowska, Barbara Romelczyk-Baishya, Agnieszka Chodara, Iwona Koltsov, Hilary Smogor, Jan Mizeracki, Zbigniew Pakiela, Witold Lojkowski
Summary: Inverse nanocomposites with higher ceramic content exhibit promising potential as bone implants due to their improved mechanical properties and porosity.
Article
Chemistry, Physical
Erfan Zal Nezhad, Xiang Qu, Farayi Musharavati, Fadi Jaber, Mark R. Appleford, S. Bae, Kaan Uzun, Morgan Struthers, Muhammad E. H. Chowdhury, Amith Khandakar
Summary: In this study, hydroxyapatite/titanium nanotube/carbon nanotube (HA/TNT/CNT) nanocomposites with different CNT contents were fabricated and their mechanical properties, biocompatibility, and tribological characteristics were investigated. The results showed that HA/TNT/CNT with higher CNT content exhibited improved mechanical properties and reduced wear debris volume, with no cytotoxicity in in-vitro biocompatibility tests.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Nivas Ramachandiran, Hamed Asgari, Francis Dibia, Roger Eybel, Ali Keshavarzkermani, Adrian Gerlich, Ehsan Toyserkani
Summary: Directional heating in metal additive manufacturing leads to an anisotropic micro-structure, causing variations in properties. This study focuses on the anisotropy of Ti-5553 alloy components produced by laser powder bed fusion. Samples printed in different orientations were tested under uniaxial tensile loading. The samples printed parallel to the building direction exhibited significantly higher ultimate strength compared to the samples printed normal to the building direction due to the presence of slip bands and transgranular fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
S. Rempel, A. A. Valeeva, A. A. Rempel
Summary: In this study, the bioresorbability of TiOy/HAp nanocomposites was determined using simulated body fluid. The addition of TiOy increased the solubility of the nanocomposites and slowed down secondary crystallization in the simulated body fluid. By varying the concentration of TiOy, the degradation rate, mechanical destruction, and tube formation of the nanocomposites could be controlled.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Oleg N. Chupakhin, Alexandra A. Musikhina, Irina A. Utepova, Valery N. Charushin, Andrey A. Rempel, Victoria Pryakhina, Svetlana Pershina, Liudmila A. Yolshina, Elena Yu Zyryanova, Emma G. Vovkotrub
Summary: This study presents a versatile synthetic protocol for obtaining promising carbon materials through the C-C coupling of graphenide lithium species with azaaromatic compounds. The results show that the more electrophilic oxadiazolopyrazine produces highly functionalized graphene with non-isomorphic properties. However, the phenanthrolinyl graphene has a lower degree of functionalization due to a lower electmphilicity of azine. Nonetheless, the phenanthrolinyl graphene exhibits a high affinity for Eu3+ ions in netural or alkaline conditions, with the ability to undergo at least 5 sorption/desorption cycles. The structures of the azine-graphene dyads were confirmed using various physicochemical analyses methods.
Article
Chemistry, Inorganic & Nuclear
E. M. Zhilina, A. S. Russkikh, S. A. Krasikov, T. V. Osinkina, A. A. Rempel
Summary: The possibility of using the aluminothermic method for the reduction of metals from oxides in the synthesis of high-entropy alloys is demonstrated. Experimental studies have shown that the aluminothermal production of the high-entropy AlTiZrVNb alloy, where the structure is formed by the interaction of oxides with aluminum at high temperatures, has a good separation of oxide and metal phases.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Dmitry N. Pevtsov, Lyubov M. Nikolenko, Alexander V. Nevidimov, Sergey A. Tovstun, Anna V. Gadomska, Vladimir A. Kuzmin, Vladimir F. Razumov, Maria A. Trestsova, Irina A. Utepova, Oleg N. Chupakhin, Alexander V. Shchepochkin, Albina A. Valeeva, Andrey A. Rempel
Summary: A series of compounds were synthesized and investigated for their fluorescence properties in two solvents. Bright fluorescence from a locally excited state was observed for certain compounds in tetrachloroethylene solution, while intramolecular charge transfer was seen in benzene solution. The rest of the compounds exhibited locally excited fluorescence in both solvents. These results indicate an additive effect of the substituents on the activation energy of nonradiative decay.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Physical
S. A. Uporov, S. Kh Estemirova, E. Sterkhov, I. A. Balyakin, A. A. Rempel
Summary: This study focuses on the structure, magnetic and magnetocaloric properties of ScGdTbDyHo high-entropy alloy fabricated under different conditions. The experimental results reveal that these alloys have complex magnetic structures and large cooling powers. There is a correlation between structural defectiveness and refrigerant capacity in this rare-earth system.
Article
Chemistry, Physical
Yulia Kuznetsova, Ivan D. Popov, Evgeny Yu. Gerasimov, Andrey A. Rempel
Summary: In this study, the impact of the ligand shell on the stability and optical properties of CdS quantum dots in a water colloidal solution stabilized by MPS was investigated. The relationship between stability and nanoparticle parameters including hydrodynamic radius, nucleus size, and zeta-potential was established. The optimal synthesis conditions for stable colloidal solutions with luminescence were identified. The mechanism of the organic MPS shell's structural organization, bonding to the semiconductor nanoparticle surface, and its influence on agglomeration were developed. Additionally, a mechanism for switching on the luminescence of MPS-capped CdS quantum dots in water solution through pH control was proposed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Anastasia K. Bachina, Vadim I. Popkov, Anna S. Seroglazova, Maria O. Enikeeva, Anna Yu. Kurenkova, Ekaterina A. Kozlova, Evgeny Y. Gerasimov, Albina A. Valeeva, Andrey A. Rempel
Summary: This article describes the synthesis and characterization of spherulite-like nanocrystalline titania with rutile structure (r-TiO2). The r-TiO2 particles were synthesized via hydrothermal treatment of TiO(C6H6O7) titanyl citrate. The resulting r-TiO2 spherulites are micron-sized agglomerates of rod-shaped nanocrystals with a high specific surface area and high photocatalytic performance.
Article
Nanoscience & Nanotechnology
Ekaterina A. Kozlova, Albina A. Valeeva, Anna A. Sushnikova, Angelina Zhurenok, Andrey A. Rempel
Summary: Photocatalysts based on titanium dioxide were successfully synthesized by high-energy ball milling, leading to phase transformations, changes in crystalline size, and increased specific surface area of titanium dioxide. The synthesized photocatalysts exhibited comparable activity and superior adsorption properties compared to the commercial standard.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2022)
Article
Chemistry, Inorganic & Nuclear
N. V. Pechishcheva, D. P. Ordinartsev, A. A. Valeeva, P. V. Zaitceva, A. D. Korobitsyna, A. A. Sushnikova, S. A. Petrova, K. Yu. Shunyaev, A. A. Rempel
Summary: Microcrystalline powders of rutile and anatase were milled to obtain nanosized TiO2 powders, which showed significant ability to remove chromium from aqueous solutions. The powders were effective in removing both Cr(VI) and total chromium under UV-irradiation and short wavelength visible light. The presence of acetate buffer promoted the most efficient chromium removal. This work provides a simple way to obtain a highly effective material for the removal of high toxic hexavalent chromium from industrial wastewater.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ekaterina S. Vorontsova, Yulia Kuznetsova, Maria Ulitko, Svetlana Rempel
Summary: The properties and cytotoxicity of aqueous colloidal solutions of CdS nanoparticles obtained by chemical condensation were studied. The hydrodynamic diameter, size distribution, zeta-potential, and optical properties of CdS nanoparticles in solution were analyzed using dynamic light scattering and optical spectroscopy. The cytotoxicity of colloidal CdS nanoparticles at various concentrations was evaluated on human dermal fibroblasts and the cancer HeLa line.
MENDELEEV COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
E. M. Zhilina, A. S. Russkih, T. V. Osinkina, E. V. Ignatieva, S. A. Petrova, S. A. Krasikov, A. V. Dolmatov, A. A. Rempel
Summary: We have successfully prepared AlTiZrVNb high-entropy alloys using a joint aluminothermic reduction method. V and Nb undergo higher reduction extent, with about 90% of their amounts transferring into the metal phase, while Ti and Zr undergo lower reduction extent, with 76% and 50% of their amounts transitioning into the metal phase, respectively. The obtained alloy has a multiphase structure consisting of C14 Laves phases, Zr5Al3-type phases, and a B2-type ordered phase, which serves as the matrix. The microhardness of the alloy is 6.37 GPa, comparable to that of refractory HEAs. The structure of the obtained alloy exhibits a similar coarse-grained feature throughout its bulk, with some pores partly filled with non-metallic aluminum oxide inclusions.
RUSSIAN CHEMICAL BULLETIN
(2023)
Article
Chemistry, Physical
N. V. Pechishcheva, D. P. Ordinartsev, A. A. Valeeva, P. V. Zaitseva, A. D. Korobitsyna, A. A. Sushnikova, A. V. Kim, K. Yu. Shunyaev, A. A. Rempel'
Summary: The properties of nanosized sorbents prepared by high-energy milling from microcrystalline powder of rutile modification were studied. The results showed that milling to an average crystallite size of 30 nm and ultraviolet illumination significantly improved the sorption properties of rutile for chromium and its ability to be reduced. The maximum removal of Cr(VI) from aqueous solutions was achieved under UV illumination in an acetate buffer medium at pH 4-5 and a content of ground rutile of 16.7 g/L. A mechanism for adsorption was proposed.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Albina A. Valeeva, Irina B. Dorosheva, Anna A. Sushnikova
Summary: Titanium oxide (Ti3O5) microcrystals were synthesized by solid-phase sintering from a mixture of titanium Ti and titanium dioxide TiO2 powders, and then Ti3O5 nanocrystals were produced by high-energy ball milling. X-ray diffraction analysis showed that the structure of milled Ti3O5 powders remained monoclinic, and the reflections were broadened due to the small particle size and microdeformations. Increasing the milling time resulted in a decrease in coherent scattering regions, an increase in the nanophase volume fraction, and an increase in microdeformations value. The morphology and surface area of the milled nanopowders were examined using SEM, HRTEM, and BET techniques.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2023)
Article
Materials Science, Multidisciplinary
Albina A. Valeeva, Andrey A. Rempel, Sergey Naumov, Natalya N. Kuranova, Hartmuth Schroettner
Summary: In this study, a single crystal of niobium monoxide was successfully grown and its growth mechanism and crystal orientation were investigated. The lattice constant and surface orientation of the single crystal were determined through XRD data and geometric analysis. The experimental results confirmed the accuracy of the study.
MATERIALS CHARACTERIZATION
(2023)
