Article
Chemistry, Physical
Petr Cernohorsky, Tatiana Pisarenko, Nikola Papez, Dinara Sobola, Stefan Talu, Klara Castkova, Jaroslav Kastyl, Robert Macku, Pavel Skarvada, Petr Sedlak
Summary: This paper discusses the electrostatic spinning process of specific polymeric materials, particularly the combination of PVDF and nylon-6. By mixing nanofibers from two different materials, new structures with diverse properties can be created and tested through various measurements such as SEM, DSC, XPS, Raman spectroscopy, and FT-IR. The study emphasizes the influence of nylon-6 in the spinning process on the properties and structure of PVDF.
Article
Optics
Rubby Mahajan, Ram Prakash, Sandeep Kumar, Vinay Kumar, R. J. Choudhary, D. M. Phase
Summary: In this study, Mg3(1-x)Dy3x(PO4)(2) phosphors with varying doping ratios were successfully synthesized using urea as fuel. XRD analysis confirmed a monoclinic structure for both undoped and Dy3+ (2 mol. %) doped phosphors. The PL emission spectra showed yellowish white light emission when excited with near UV light, and the band gap of Dy3+ (2 mol. %) doped Mg-3(PO4)(2) was decreased compared to undoped phosphor due to the formation of intermediate energy levels.
Article
Polymer Science
Amir Fayyaz, Haroon Asghar, Muhammad Waqas, Asif Kamal, Wedad A. Al-Onazi, Amal M. Al-Mohaimeed
Summary: The potential of using laser-induced breakdown spectroscopy (LIBS) in combination with various other spectroscopic and statistical methods was assessed for characterizing pure and MgO-doped nylon (6/6) organic polymer samples. Various techniques including XRD, FTIR, DRS, XPS, and EDX were employed to assess the structural crystallinity and chemical composition of the polymer samples. The results were validated against the standard ICP-MS technique, and PCA was applied for classification analysis, demonstrating the effectiveness of the LIBS technique for polymer characterization.
Article
Chemistry, Physical
Nirmala Rani, Kanika Khurana, Neena Jaggi
Summary: CNTs based nanocomposites are highly promising materials in various fields due to their excellent properties. This research focused on spectroscopic study of FMWCNTs nanocomposites with different wt% of SnO2 NPs, confirming structural defects through XRD and Raman spectroscopy, chemical composition through XPS, and morphology through FESEM and TEM analysis. FTIR spectroscopy was used to validate the presence of different functional groups on the FMWCNTs and SnO2/FMWCNTs nanocomposites.
SURFACES AND INTERFACES
(2021)
Review
Materials Science, Multidisciplinary
Mikhail Shekhirev, Christopher E. Shuck, Asia Sarycheva, Yury Gogotsi
Summary: The field of MXene continues to grow as more research groups investigate this large class of 2D materials. While synthesis and applications have been widely discussed, the importance of characterization is often overlooked. This review focuses on various advanced characterization techniques for understanding the precursor suitability, successful synthesis, composition, structure, and properties of MXene.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Y. Alaoui, M. Laourayed, A. Er-rafai, M. Hammi, M. El Moudane, M. Boudalia, Z. Sekkat, I. Warad, A. Guenbour, A. Bellaouchou, A. Zarrouk
Summary: In this study, six aluminum potassium calcium based-phosphate glasses were synthesized and their structural and chemical properties were investigated. The addition of aluminum was found to have a positive effect on the density, glass transition temperature, and crystallization temperature of the glasses, as well as generating new chemical bonds in the glass structure.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
L. Charpentier, A. Kauffmann, E. Beche, C. Escape, S. Laube, D. Schliephake, J. Esvan, B. Gorr, A. Soum-Glaude, M. Heilmaier
Summary: This study discusses how the oxidation of refractory element-based alloys affects their optical properties, specifically through changes in surface composition and roughness. The results show that the oxidation process significantly increases the spectral emissivity of the samples. The oxidized TMCA and TMCTA alloys exhibit a higher solar absorptivity compared to state-of-the-art Ni-based alloys used in solar power plants, making them promising candidates for solar thermal energy conversion applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Polymer Science
Tatiana Pisarenko, Nikola Papez, Dinara Sobola, Stefan Talu, Klara Castkova, Pavel Skarvada, Robert Macku, Erik Scasnovic, Jaroslav Kastyl
Summary: This study focuses on the characterization and investigation of polyvinylidene fluoride (PVDF) nanofibers. Different types of fibers were produced by varying the collector speed, which significantly affected fiber alignment and wetting behavior. The study revealed that the differences at the macrolevel are closely connected and originate from nanolevel attributes.
Article
Polymer Science
Dorina M. Chipara, Alexandro Trevino, Karen Lozano, Bryan Hoke, Karen S. Martirosyan, Mircea Chipara
Summary: Nanocomposites were prepared by melt mixing polyvinylidene fluoride with various concentrations of magnetite. Multiple spectroscopy techniques were used to investigate these nanocomposites and the results demonstrated a strong interaction between the matrix and the nanofiller.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Anatomy & Morphology
Okan Uslu, Gokhan Dikmen, Ekim Onur Orhan
Summary: This study investigated the intrinsic physicochemical properties and interactions of three different calcium hydroxide-based medications using various analytical methods. The study found differences in the chemical composition of the medications, with only calcium hydroxide and barium sulfate matching in X-rays powder diffraction analysis. Energy-dispersive X-ray spectroscopy analysis showed that the amount of Ba and S elements in PCpw was lower than TCmx and PCmx, while the Ca content in PCpw was higher.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Materials Science, Ceramics
Manika Chaudhary, Milan Singh, Ashwani Kumar, Prachi, Yogendra K. Gautam, Anil K. Malik, Yogesh Kumar, Beer Pal Singh
Summary: The research introduced a facile and cost-effective method to prepare CuO nanostructures with different morphologies, and studied their performance in supercapacitors. Fe-doped CuO nanostructures showed superior specific capacitance and cyclic stability, indicating their potential as electrode materials for the next generation energy storage devices.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
Madhuri Mishra, Rajib Saha, Lavi Tyagi, Sushama Sushama, Sushil Kumar Pandey, Subhananda Chakrabarti
Summary: In this study, phosphorus-doped MgZnO thin films were prepared through spin-on doping and annealing, which improved the morphology, structure, and optical properties. Annealing at temperatures of 800-900 degrees C resulted in good morphology and large grains.
JOURNAL OF LUMINESCENCE
(2023)
Article
Spectroscopy
Jingyu Jiang, Shuo Zhang, Phil Longhurst, Weihua Yang, Shaojie Zheng
Summary: The research investigated the molecular structure of bituminous coal using X-ray diffraction, Raman spectroscopy, and Fourier Transform infrared spectroscopy on samples from coal mines in Northern China. Results revealed low degree of ordered microcrystalline units with a low degree of aromatic conformation, with the largest proportion of oxygenated functional groups in the samples. This study contributes to the ongoing understanding of molecular structural characteristics of bituminous coal and properties like wettability and pore structure.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Dinesh Kumar Pati, S. Bhattacharjee, M. Mahapatra, B. N. Parida, Piyush R. Das, R. Padhee
Summary: In this study, a detailed investigation of the multifunctional properties of calcium strontium titanate substituted lead iron niobate ceramic oxide was reported. The compound exhibited a pseudocubic structure and presence of tensile strain, as well as photocatalytic activity and weak ferromagnetism and ferroelectricity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Mian Zhong, Xin Dai, Hongxing Xiang, Bingwei Liu, Xin Zhao, Dongshan Wei, Xiaoguang Tu, Zhihao Wang, Yan Gong, Yajun Xu, Mingxia He
Summary: By doping reduced graphene oxide into epoxy resin, a composite coating with excellent mechanical and electrical properties can be obtained. Characterization techniques such as Raman spectrum testing and X-ray diffractometer can effectively confirm the physical properties of the composite coating, while terahertz spectroscopy analysis reveals the spectral characteristics of the composite coating.
Article
Materials Science, Ceramics
Vijay Bijalwan, Jaroslav Kastyl, Vladimfr Prajzler, Jirf Erhart, Vaclav Pouchly, Karel Maca
Summary: This work presents a promising approach to synthesize multifunctional-translucent BCZT-CeO2 ceramic for electro-mechanical/optical conversion. The ceramics achieved high dielectric permittivity, low dielectric loss, and extraordinary optical transmittance. Post-processing method further improved the piezoelectric properties of the ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Polymer Science
Farid Orudzhev, Dinara Sobola, Shikhgasan Ramazanov, Klara Castkova, Nikola Papez, Daud A. Selimov, Magomed Abdurakhmanov, Abdulatip Shuaibov, Alina Rabadanova, Rashid Gulakhmedov, Vladimir Holcman
Summary: The synthesis of hybrid polymer-inorganic nanocomposite fiber membranes based on PVDF and BFO can effectively solve the problem of decomposing organic dyes with high efficiency by combining the advantages of photoactive piezoelectric nanomaterials and ferroelectric polymers, collecting mechanical vibrations and light energy.
Article
Chemistry, Multidisciplinary
Shikhgasan Ramazanov, Dinara Sobola, Gaji Gajiev, Farid Orudzhev, Pavel Kaspar, Adil Gummetov
Summary: This paper investigates the formation of a bismuth ferrite (BFO) film on a polymeric flexible polyimide substrate using low temperature atomic layer deposition (ALD) at 250 degrees C. Two samples of BFO/Polyimide with different thicknesses (42 nm, 77 nm) were examined. Increasing film thickness led to the formation of a crystalline BFO phase with magnetic and electrical properties characteristic of a multiferroic material. The competition between the magnetic and electrical subsystems resulted in an anomalous magnetization behavior at a temperature of 200 K, possibly related to the multiferroic/polymer interface. This paper explores the potential of low-temperature growth of BFO films on organic materials as structural components for flexible and quantum electronics.
Article
Chemistry, Physical
Denis Misiurev, Pavel Kaspar, Dinara Sobola, Nikola Papez, Saleh H. Fawaeer, Vladimir Holcman
Summary: This study reports the deposition and characterization of bismuth ferrite thin films using Piezoresponse Force Microscopy (PFM) and XPS methods. The aim is to understand the magnetic patterns and piezoelectric response of the deposited films. The results provide a foundation for future research on piezoelectric grain formation, thickness-dependent domain wall formations, and the effects of substrate topology on the magnetic properties of bismuth ferrite films.
Article
Chemistry, Physical
Farid Orudzhev, Nariman Alikhanov, Abdulkarim Amirov, Alina Rabadanova, Daud Selimov, Abdulatip Shuaibov, Rashid Gulakhmedov, Magomed Abdurakhmanov, Asiyat Magomedova, Shikhgasan Ramazanov, Dinara Sobola, Kamal Giraev, Akhmed Amirov, Kamil Rabadanov, Sultanakhmed Gadzhimagomedov, Rabadanov Murtazali, Valeria Rodionova
Summary: The creation of multi-stimuli-sensitive composite polymer-inorganic materials is important for solving environmental and energy problems. In this study, a hybrid polymer-inorganic nanocomposite porous membrane based on PVDF and BiFeO3/BFO was synthesized and characterized. The addition of BFO increased the proportion of the polar phase and the sample exhibited laser-induced fluorescence depending on the presence of nanoparticles. Furthermore, piezo-photocatalytic experiments showed an increased reaction rate under the combined actions of ultrasonic treatment and UV-visible light irradiation.
Review
Polymer Science
Rashid Dallaev, Tatiana Pisarenko, Nikola Papez, Petr Sadovsky, Vladimir Holcman
Summary: This paper offers a brief overview of epoxy resins, discussing their characteristics, variants, chemical modifications, curing processes, and electrical properties. It highlights the crucial role of epoxy resins in electrical insulation, explores strategies to enhance dielectric strength, and investigates the impact of fillers and additives on insulation performance.
Article
Polymer Science
Mohammed A. Al-Anber, Malak Al Ja'afreh, Idrees F. Al-Momani, Ahmed K. Hijazi, Dinara Sobola, Suresh Sagadevan, Salsabeel Al Bayaydah
Summary: In this study, silver (I) ions were successfully loaded onto L-cysteine-functionalized silica, forming a homogeneous monolayer. The adsorption process was found to be chemisorption-controlled, involving chemical bonding between silver ions and the silica surface. This study is important for understanding the saturation of silver ions on silica surfaces and the underlying association mechanisms.
Article
Chemistry, Physical
Shikhgasan Ramazanov, Farid Orudzhev, Gaji Gajiev, Vladimir Holcman, Robert Saraiva Matos, Henrique Duarte da Fonseca Filho, Stefan Talu, Daud Selimov
Summary: A heterostructure BiFeO3/TiO2(Nt)Ti (BFOT) with p-type conductivity in the BFO film and n-type conductivity in the nanotubes was obtained by the atomic layer deposition method. The redistribution of Fe/Ti atoms and the formation of Aurivillius intermediate layered phase and local charge capture centers were observed after thermal treatment. The ferroelectric switching and the transition of the memristive structure were affected by the lateral displacement of the sample and the properties of the periodic signal. The compensation of static charge during resistive switching and the acceleration of structure restructuring with increasing voltage were found to influence the transport properties of the material. The correlation between surface static charge and piezopotential was shown through the analysis of piezoresponse force microscopy, electrostatic force microscopy, and fractal/multifractal dynamics. This new methodology can contribute to the understanding of the resistive switching processes in ferroelectric/semiconductor memristive structures.
APPLIED SURFACE SCIENCE
(2024)
Article
Biochemistry & Molecular Biology
Farid Orudzhev, Arsen Muslimov, Daud Selimov, Rashid R. Gulakhmedov, Alexander Lavrikov, Vladimir Kanevsky, Rashid Gasimov, Valeriya Krasnova, Dinara Sobola
Summary: This paper reports on the high photocatalytic activity of ZnO tetrapods (ZnO-Ts) under visible/solar light and hydrodynamic water flow. It was demonstrated that surface oxygen defects play a crucial role in the photocatalytic activity of ZnO-Ts. The ability to control the surface wettability and surface defect concentration of ZnO-Ts was also shown. Additionally, the similar photocatalytic activity of ZnO-Ts under direct and simulated sunlight offers great potential for solar photocatalysis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
