Article
Materials Science, Composites
Chenyuan Teng, Yuanxiang Zhou, Ling Zhang, Yunxiao Zhang, Xin Huang, Jianning Chen
Summary: This study focuses on the issue of DC electric field distortion within polymeric insulation caused by the negative temperature coefficient of electrical resistivity. By coating polydopamine onto positive temperature coefficient (PTC) ceramic particles, the compatibility with the polymer matrix is improved, resulting in a maintained DC breakdown strength. The enhanced dispersion of PTC particles also leads to the generation of interface charge traps, contributing to the increase of electrical resistivity at elevated temperature and further mitigating the NTC effect of epoxy composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Pierre Carmona, Magnus Roding, Aila Sarkka, Christian von Corswant, Eva Olsson, Niklas Loren
Summary: The evolution and coarsening kinetics of porous phase-separated ethylcellulose/hydroxypropylcellulose films produced by spin-coating have been investigated in this study. Bicontinuous structures were found for a certain range of EC:HPC ratio, and two main coarsening mechanisms were identified: interfacial tension-driven hydrodynamic growth for bicontinuous structures and diffusion-driven coalescence for discontinuous structures. These findings provide valuable insights into the morphology development and potential applications of thin EC/HPC films for controlled drug release.
Article
Chemistry, Physical
Ivana Mrsic, Anita Lorenz, Ralph J. Lehnert, Gunter Lorenz, Thomas Chasse
Summary: For medical polymers, the surface condition is crucial for biocompatibility, with the separation of Irganox antioxidant affecting the chemical composition and stability. Different polymers from the Pellethane series were examined for blooming, with techniques like SEM and Raman microscopy used for evaluation. The bloomed areas increased with film thickness and slightly impacted protein structures on the surface.
APPLIED SURFACE SCIENCE
(2022)
Article
Polymer Science
Xiaoxing Zhang, Hui Lin, Yiran Hu, Dalin Ding, Fujin Cai, Yunjian Wu
Summary: This study successfully synthesized high-performance epoxy insulating materials with varying disulfide bond contents, which enhance the mechanical properties of the epoxy resin while fulfilling the prerequisites for electrical applications. The self-healing test showed an optimal repair efficiency of 81.23%.
POLYMER DEGRADATION AND STABILITY
(2023)
Review
Materials Science, Biomaterials
Joana Moreira, A. Catarina Vale, Natalia M. Alves
Summary: The review discusses the application of spin-coating technique in the fabrication of freestanding films for various biomedical and tissue engineering purposes. By developing methods involving the interface of the substrate and the deposited solution, self-supported films can be obtained.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Polymer Science
Srimala Sreekantan, Ang Xue Yong, Norfatehah Basiron, Fauziah Ahmad, Fatimah De'nan
Summary: This study investigates the effects of three different solvents on the preparation of superhydrophobic coatings and finds that the addition of isopropanol in the solution leads to the highest water contact angle, tilting angle, and surface roughness.
Article
Materials Science, Multidisciplinary
Xiaoli Zhang, Yongxing Guo, Yi Li, Wei Liu, Hongkun Li, Yonggang Yang
Summary: Structurally colored epoxy resin films were prepared by photopolymerization using liquid crystalline epoxy monomer and a chiral additive. The reflective wavelength can be controlled by changing the concentration of the additive, and colored patterns can be achieved by controlling the polymerization temperature. These films have potential applications in anti-counterfeiting.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Applied
Si-Yao Guo, Hui-Hua Luo, Zhe Tan, Ji-Zhou Chen, Lihai Zhang, Jie Ren
Summary: The study showed that TiO2-graphene could be evenly dispersed in the epoxy resin matrix without reducing interfacial bonding strengths. Among the different dosages, 0.5% exhibited the best coating performance, significantly improving the impermeability of concrete to water and chloride penetration.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Multidisciplinary
Kui Wang, Weijiang Huang, Kai Zhang, Xingyu Guan, Qin Tian, Chunyun Tu, Qiuping Fu, Wei Yan
Summary: Inorganic particles with controllable morphology and composition are crucial for regulating the flame retardancy of polymers. In this study, aluminum phosphate-coated silica particles were prepared, and the effect of the coating content on the morphology was investigated. The results showed that the coated particles could simultaneously enhance the mechanical properties and flame retardancy of epoxy resin.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Weibin Zhang, Zhiyong Liu, Qingbo Liu, Weiqiang Zhang
Summary: Understanding the bond behavior between waterborne epoxy-coated steel reinforcing bars (WECR) and concrete is crucial for their application in concrete structures. This study conducted pull-out tests on forty-eight specimens to investigate the bond behavior. The study analyzed failure modes, bond stress-slip relationships, and obtained the formula for ultimate bond stress. The results showed that coating thickness had an impact on bonding behavior due to changes in rib height and rib angle.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Environmental
Jing Hong, Tong Wu, Haiyang Wu, Birong Zeng, Shanni Zeng, Ting Chen, Xiu Wang, Zhenwu Lu, Conghui Yuan, Krishnasamy Balaji, Denise F. S. Petri, Lizong Dai
Summary: The hierarchical dots-core-shell structure Ag@HNT@PZE, combining the catalytic degradation of toxic gases by Ag and enhanced dispersion and flame retardant efficiency by PZE, effectively reduced the flammability and smoke toxicity of EP nanocomposites. The composite exhibited improved fire safety properties with higher LOI, UL-94 grade, and char yield, along with a significant decrease in pHRR and increased graphitized char layer formation. The use of Ag nanoparticles within HNT for catalyzing gas conversion and PZE coating for enhancing flame retardant properties provides a potential solution for developing efficient flame retardants for nanocomposites.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Xia-Li Liang, Jian-Qing Dai
Summary: BFMO thin films were successfully deposited on FTO/glass substrates via sol-gel technique, with Mn doping showing significant enhancement in properties compared to pure BFO samples. The Mn doping-induced changes in structure, grain size reduction, and oxygen vacancies were identified as underlying mechanisms for the improved performance of BFMO films, making them promising for ferroelectric photovoltaic device applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Zhiqiang Fang, Guoqing Wang, Yangkai Xiong, Jiang Li, Yu Yang, Lei Huang, Peiqing Wang, Jianhe Liao, Aimin Wang
Summary: The study demonstrates that polyaniline-coated basalt rockwool wastes have enhanced dispersion stability and improved anticorrosion performance in epoxy resin coatings, achieving a high protection efficiency of up to 97.7%. This research not only offers a promising solution to the issues caused by BRWs but also transforms these wastes into valuable substances.
Article
Polymer Science
Zhe Pan, Minmin Mao, Bin Zhang, Zhongyu Li, Kaixin Song, Hai-Feng Li, Zhu Mao, Dawei Wang
Summary: In this manuscript, bisphenol F epoxy resin (EPF) was fabricated into polymer films using a hot-pressing method. The curing degree of EPF was found to be significantly affected by the ratio of EP monomer/curing agent, resulting in improved breakdown strength and energy storage performance. Specifically, an EPF film with an EP monomer/curing agent ratio of 1:1.5 achieved a high discharged energy density (U-d) of 6.5 J.cm(-3) and efficiency (eta) of 86% under an electric field of 600 MV.m(-1), demonstrating the facile production of high-quality EP films with excellent energy storage performance for pulse power capacitors.
Article
Materials Science, Ceramics
Hongfei Liu, Chenjun Zhang, Zhiping Zhang, Xiangdong Meng, Xianghua Zeng
Summary: Orthorhombic Sc2Mo3O12 films were successfully prepared via spin coating technique followed by annealing at 500-750 degrees C. The crystallinity of the films improved with higher post-annealing temperatures, demonstrating stable negative thermal expansion properties. The coefficients of thermal expansion in different directions were also determined, showing the overall shrinkage and expansion of the thin film.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Anastasia Skvortsova, Andrii Trelin, Pavel Kriz, Roman Elashnikov, Barbora Vokata, Pavel Ulbrich, Alexandra Pershina, Vaclav Svorcik, Olga Guselnikova, Oleksiy Lyutakov
Summary: This study combines DNA-targeted surface functionalization, SERS measurements, and decision system to detect antibiotic susceptibility markers with high confidence, allowing manipulation with complex multicomponent samples and automatically determining the required number of samples, achieving high confidence detection of targeted ODN.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Physical
E. Miliutina, S. Chufistova, V. Burtsev, A. Tulupova, A. Olshtrem, O. Guselnikova, P. Postnikov, P. Sajdl, P. Zamostny, V. Svorcik, O. Lyutakov
Summary: We developed a strategy to produce periodic patterned surfaces with controlled hydrophilic and hydrophobic nanoareas. The approach involves colloid lithography and electrochemical surface grafting, and the resulting surfaces show different affinities towards proteins and micelles, making them suitable for drug delivery and qualitative analysis.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Vasilii Burtsev, Elena Miliutina, Pavel Ulbrich, Roman Elashnikov, Vaclav Svorcik, Martin Orendac, Oleksiy Lyutakov
Summary: This paper presents a method for plasmon-induced organic reactions using the coupling enhancement between silver nanoparticles and gold gratings, which leads to highly efficient plasmon-triggered reactions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Environmental
Viktoria Neubertova, Olga Guselnikova, Yusuke Yamauchi, Anastasia Olshtrem, Silvie Rimpelova, Erik Cizmar, Martin Orendac, Jan Duchon, Lenka Volfova, Jan Lancok, Vit Herynek, Premysl Fitl, Pavel Ulbrich, Ludek Jelinek, Patrik Schneider, Juraj Kosek, Pavel Postnikov, Zdenka Kolska, Vaclav Svorcik, Sergii Chertopalov, Oleksiy Lyutakov
Summary: This study explores the covalent functionalization of MXenes for bioimaging applications. By using a chelating agent and Gd3+ ions, the commonly diamagnetic MXenes were transformed into paramagnetic materials, enabling their use in magnetic resonance imaging. Covalent functionalization not only enhanced the stability and cytocompatibility of MXenes but also prevented the leakage of Gd3+ ions. This work expands the bioapplication of MXenes by introducing an MRI contrast and developing covalent functionalization strategies.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
D. Zabelin, A. Zabelina, E. Miliutina, A. Trelin, R. Elashnikov, D. Nazarov, M. Maximov, Y. Kalachyova, P. Sajdl, J. Lancok, M. Vondracek, V. Svorcik, O. Lyutakov
Summary: Titanium oxide is commonly used as an effective catalyst for photo-electrochemical water splitting, but its wide bandgap limits the utilization of visible and near-infrared light. The photosensitization of titanium oxide with plasmonic nanostructures has been proposed as a solution. In this work, a plasmon-based titanium oxide photosensitization method using a gold grating is presented. The gold grating supports the excitation and propagation of surface plasmon polariton wave, resulting in the activation of titanium oxide. Experimental results demonstrate that this structure enables efficient photo-electrochemical water splitting and hydrogen production under near-infrared light irradiation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Analytical
M. Erzina, A. Trelin, O. Guselnikova, A. Skvortsova, K. Strnadova, V. Svorcik, O. Lyutakov
Summary: In this study, a combination of functional SERS substrate and CNN transfer learning was proposed for quantitative detection of a specific biomolecule in human serum. The method allows for quick and decentralized identification of increased biomolecule concentration, making it a valuable tool for analysis in the absence of spectral data.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Jan Svanda, Yevgeniya Kalachyova, David Mares, Jakub Siegel, Petr Slepicka, Zdenka Kolska, Petr Machac, Stefan Michna, Vaclav Svorcik, Oleksiy Lyutakov
Summary: Design and properties of a plasmonic modulator tunable by electric field are presented. The modulator comprises a periodic surface pattern created on an elastic polymer surface supported by a piezo-substrate, and the amplitude of the pattern can be controlled by an external electric field for fine-tuning the excitation of surface plasmon-polaritons.
Article
Nanoscience & Nanotechnology
Vladislav Buravets, Frantisek Hosek, Ladislav Lapcak, Elena Miliutina, Petr Sajdl, Roman Elashnikov, Vaclav Svorcik, Oleksiy Lyutakov
Summary: In this study, a novel, simple, and scalable method for the synthesis of tantalum disulfide (TaS2) is reported, using CS2 as a sulfurizing agent and Ta2O5 as a metal precursor. The structure of the created TaS2 flakes was analyzed, and a tuning between 1T (metallic) and 3R (semiconductor) phases was achieved by varying the reaction conditions. The electrocatalytic activity of the synthesized materials was significantly enhanced after electrochemical self-activation, reaching a level comparable to that of Pt. This work provides a scalable and simple synthesis method for transition-metal sulfides that could replace platinum catalysts in water splitting technology.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Anna Zabelina, Elena Miliutina, Denis Zabelin, Vasilii Burtsev, Vladislav Buravets, Roman Elashnikov, Viktorie Neubertova, Martin St'astny, Daniela Popelkova, Jan Lancok, Sergii Chertopalov, Martin Paidar, Andrii Trelin, Alena Michalcova, Vaclav Svorcik, Oleksiy Lyutakov
Summary: Hybridization of catalytic and plasmon active materials is proposed to efficiently improve photo-electrochemical (PEC) water splitting. The plasmon coupling between surface plasmon polariton (SPP) and localized surface plasmon (LSP) is utilized to achieve gigantic light concentration and trigger the catalytic activity of titanium diboride (TiB2) flakes. The catalytic activity enhancement of TiB2 flakes through coupled plasmon triggering is investigated in various conditions, showing the excitation of electron-hole pairs and their separation/acceleration in strong plasmons field. This work presents a novel approach for realizing a symmetric and less pH-sensitive catalyst for PEC water splitting.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Jiri Stulik, Radek Polansky, Petr Kubersky, Denis Zabelin, Oleksiy Lyutakov, Zdenka Kolska, Vaclav Svorcik
Summary: An ammonia gas sensor based on nanostructured polypyrrole functionalized by carboxylic groups (PPyCOOH) was prepared. The sensor exhibited a strong response to ammonia and measures were taken to reduce its sensitivity to humidity. The functionalization with metal-organic framework (MAF-6) and the incorporation of multiwall carbon nanotubes (MWCNTs) were effective in reducing the humidity dependence of the sensor. Rating: 7 out of 10.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Anastasia Skvortsova, Andrii Trelin, Antonin Sedlar, Mariia Erzina, Martina Travnickova, Lucie Svobodova, Zdenka Kolska, Jakub Siegel, Lucie Bacakova, Vaclav Svorcik, Oleksiy Lyutakov
Summary: The development of advanced methods of SERS-CNN data analysis provides an effective solution for determining the species and behavior of microorganisms. Machine learning allows precise analysis of complex spectra of biological samples and provides accurate decisions for specific tasks. This article demonstrates the application of the SERS-CNN approach in remote observation of mesenchymal stem cell behavior, enabling non-invasive estimation of cell survival and proliferation rate using Raman measurements and advanced spectra data processing.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Marketa Kaimlova, Jana Pryjmakova, Miroslav Slouf, Oleksiy Lyutakov, Giovanni Ceccio, Jiri Vacik, Jakub Siegel
Summary: Ultramicrotome cutting is a useful tool for preparing thin polymeric films, allowing for decreased surface roughness and the recording of morphological changes during processing. In this study, PET and PEEK polymers were modified using a KrF excimer laser and decorated with AgNPs. The laser irradiation resulted in ripple-like structures on PET and worm-like structures on PEEK, both covered by AgNPs. The technique shows potential for direct polymer writing and the preparation of stimuli-responsive nanoporous membranes.
Article
Engineering, Biomedical
Denis Nazarov, Ilya Ezhov, Natalia Yudintceva, Maxim Shevtsov, Aida Rudakova, Vladimir Kalganov, Vladimir Tolmachev, Yuliya Zharova, Oleksiy Lutakov, Ludmila Kraeva, Elizaveta Rogacheva, Maxim Maximov
Summary: The combination of titania nanofilms and silver nanoparticles is a promising material for titanium implant coatings, exhibiting antibacterial activity and osseointegration-induced properties. In this study, TiO2 nanolayer/Ag NP structures were successfully prepared on titanium disks using atomic layer deposition. The samples showed high antibacterial activity, differentiation in the osteogenic direction, and non-cytotoxicity, indicating the success of the combining of TiO2 and Ag to produce a multifunctional biocompatible and bactericidal material.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Chemistry, Physical
D. Zabelin, A. Zabelina, A. Tulupova, R. Elashnikov, Z. Kolska, V Svorcik, O. Lyutakov
Summary: We propose an advanced plasmon-triggered Z-scheme for efficient overall water splitting using longer wavelength photons. The study demonstrates that plasmon triggering allows for the utilization of low-energy photons and can synergistically increase hydrogen production under certain conditions.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Roman Elashnikov, Silvie Rimpelova, Oleksiy Lyutakov, Vladimira Svobodova Pavlickova, Olena Khrystonko, Zdenka Kolska, Vaclav Svorcik
Summary: In this study, stimuli-responsive antibacterial nanofibers were prepared by blend electrospinning. The release of ciprofloxacin and its antibacterial activity were dependent on the nanofiber composition. The nanofibers exhibited enhanced release and antibacterial activity below the lower critical solution temperature (LCST). Furthermore, the nanofibers showed good cell compatibility and reduced bacterial attachment. These results suggest that the proposed nanofibers have great potential as wound healing materials with reduced risk of bacterial infection.
ACS APPLIED BIO MATERIALS
(2022)
