Article
Chemistry, Physical
Azliza Azani, Dewi Suriyani Che Halin, Kamrosni Abdul Razak, Mohd Mustafa Al Bakri Abdullah, Marcin Nabialek, Muhammad Mahyiddin Ramli, Mohd Fairul Sharin Abdul Razak, Andrei Victor Sandu, Wojciech Sochacki, Tomasz Skrzypczak
Summary: The modification of TiO2 thin film using sol-gel spin coating method to synthesize GO/TiO2 thin films with different amounts of PEG effectively improved the optical properties and wettability. XRD analysis showed amorphous phase, while SEM and AFM images demonstrated reduced particle agglomeration and increased surface roughness with higher PEG content.
Article
Materials Science, Ceramics
M. Ballester, A. P. Marquez, C. Garcia-Vazquez, J. M. Diaz, E. Blanco, D. Minkov, S. M. Fernandez-Ruano, F. Willomitzer, O. Cossairt, E. Marquez
Summary: Through in-depth analysis of the optical properties of thin layers of non-crystalline semiconductors, a novel optical approach has been proposed in this study, which accurately calculates the energy-band structure parameters of the material.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Aus A. Najim, Faez M. Hassan, Hiba S. Rasheed, Hashimah Ismail, Hassan H. Darwoysh
Summary: This work synthesized (Fe2O3)(1-x):(NiO)(x) thin films by pulsed laser deposition and studied the impact of NiO doping concentrations on optical properties. It was found that increasing NiO content led to a decrease in band gap and significant changes in nonlinear optical parameters. The best results were achieved in (Fe2O3)(0.98):(NiO)(0.02) thin film, showing potential for nonlinear optics applications.
Article
Materials Science, Coatings & Films
Jonathan M. Schuster, Maria L. Vera, Carlos E. Schvezov, Mario R. Rosenberger
Summary: In this study, a nanoporous/compact titanium oxide coating was synthesized on the Ti-6Al-4V alloy using the anodic oxidation and sol-gel dip-coating techniques. The coating exhibited a thickness of 600 nm, low surface roughness, and a crack-free structure, with a crystalline structure of anatase and rutile.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chandra Kumar, Vikas Kashyap, Monika Shrivastav, Fernando Guzman, Dinesh Pratap Singh, Kapil Saxena
Summary: Nickel doped cadmium sulfide (Ni:CdS) thin films were deposited using spray pyrolysis technique on glass and FTO substrate. The annealing temperature was found to have significant effects on the morphological, microstructural, optical dispersion, linear-nonlinear, and electrical properties of the thin films, which were extensively investigated using various techniques including FESEM, AFM, XRD, and UV-VIS spectroscopy. The study also analyzed the complex dielectric constant, the dispersion of the refractive index, and the nonlinear properties of the Ni:CdS films, as well as the empirical diode parameters of the designed Ag/Ni:CdS/FTO Schottky diode under illumination conditions.
Article
Chemistry, Inorganic & Nuclear
Dewi Suriyani Che Halin, Kamrosni Abdul Razak, Mohd Arif Anuar Mohd Salleh, Mohd Izrul Izwan Ramli, Mohd Mustafa Al Bakri Abdullah, Ayu Wazira Azhari, Kazuhiro Nogita, Hideyuki Yasuda, Marcin Nabialek, Jerzy J. Wyslocki
Summary: Ag/TiO2 thin films were prepared through the sol-gel spin coating method, and their microstructural growth behaviors were studied. The results showed that at low annealing temperatures, ring-like structures were formed, with the Ag particles detected as cubic in shape and TiO2 appearing as porous rings. The growth of Ag/TiO2 thin films increased in terms of area and junctions as annealing time increased, with varying growth rates observed over time.
Article
Chemistry, Physical
Satya Veer Singh, Urwashi Gupta, Sajal Biring, Bratindranath Mukherjee, Bhola N. Pal
Summary: A nanoscale heterojunction thin film of Cu2S-TiO2 has been grown using sol-gel technique and employed for efficient H-2 production. The photoelectrochemical performance of this Cu2S-TiO2 heterojunction thin film was studied and it showed significantly higher photocurrent compared to previous Cu2S (NP)-TiO2 nanocomposite photoanodes, attributed to reduced carrier recombination at the Cu2S-TiO2 interface.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Valentina Prusakova, Giovanni Giusti, Cristian Collini, Giancarlo Pepponi, Mario Barozzi, Leandro Lorenzelli, Salvatore Iannotta, Roberto Verucchi, Sandra Dire
Summary: This study investigates the resistive switching properties of metal oxide thin films and proposes an innovative approach to improve the fabrication of memristive devices. A comparison of TiO2 thin films produced by different methods demonstrates an enhancement of memristive properties and reduction of electrical shorts in TiO2 based devices.
Article
Materials Science, Ceramics
Manon Besancon, Yanhui Wang, Noellie Ylla, Valentin Cinquin, Hubert Mutin, Johan Alauzun, Eliane Espuche, Veronique Bounor-Legare
Summary: An original method of synthesizing polypropylene/titanium dioxide (PP/TiO2) composites by combining non-hydrolytic sol-gel chemistry and reactive extrusion was reported. The synthesis involved the reaction between titanium alkoxide as a titanium dioxide precursor and an acid anhydride as an oxygen donor at high temperatures in alkane liquid medium and molten polypropylene. The resulting composite showed uniform particle distribution with an average particle size of around 700 nm.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Humberto Alejandro Monreal Romero, Teresa Perez Pinon, Diana Sagarnaga, Raquel Duarte Rico, Alfredo Nevarez Rascon, Carlos Alberto Martinez Perez, Dagoberto Perez Pinon, Juan Pablo Flores de los Rios, Mario Sanchez Carrillo, Jose Guadalupe Chacon-Nava
Summary: In this study, titanium dioxide scaffolds were successfully synthesized using the sol-gel method. The scaffolds were formed by using titanium isopropoxide as a precursor and a polymeric network of galactopyranose as a template. The synthesized scaffolds have diameters of 50 nm and porosity ranging from 0.3 to 10 nm. XRD analysis confirmed the formation of crystalline phases in the TiO2 scaffold at 700 degrees C. The use of biological polymers as templates provides a low-cost and efficient approach for the synthesis of new materials.
Article
Chemistry, Multidisciplinary
Carla Calabrese, Amelie Maertens, Alessandra Piras, Carmela Aprile, Leonarda Francesca Liotta
Summary: TiO2 nanomaterials were synthesized through a sol-gel method using titanium butoxide as a precursor, Pluronic F127 as a template, toluene as a swelling agent, and acidic water or ethanol as reaction solvents. The synthesis medium influenced the phase composition of the solids, with ethanol promoting dispersed anatase particles and water leading to a rutile phase. The photocatalytic activity of the samples was tested by the photodegradation of Rhodamine B.
Article
Chemistry, Multidisciplinary
Anna Yu Kurenkova, Anastasiya Yu Yakovleva, Andrey A. Saraev, Evgeny Yu Gerasimov, Ekaterina A. Kozlova, Vasily V. Kaichev
Summary: This study proposes titania-based photocatalysts modified with copper compounds for hydrogen evolution and tests their photocatalytic activity. The synthesized photocatalysts are characterized using various methods, and the results show that the heat-treated and copper oxide deposited photocatalysts exhibit high activity under both UV and visible light irradiation.
Article
Biochemistry & Molecular Biology
Md. Torikul Islam, Md. Nahid Parvez Roni, Md. Yunus Ali, Md. Robiul Islam, Md. Shamim Hossan, M. Habibur Rahman, A. A. S. Mostofa Zahid, Md. Nur E. Alam, Md. Abu Hanif, M. Shaheer Akhtar
Summary: This study found that titanium dioxide nanoparticles, prepared through sol-gel and hydrothermal synthetic routes, have specific degradation preferences for charged substrates. It indicates the potential for the selective degradation of specific organic pollutants, facilitating cost-effective effluent management.
Article
Chemistry, Physical
Ksh Priyalakshmi Devi, Pranab Goswami, Harsh Chaturvedi
Summary: Although TiO2 is a popular semiconductor photocatalyst, its efficiency for solar energy conversion is limited due to its large bandgap. This paper introduces a cost-effective Sol-Gel technique using spin coating technology to fabricate nanocrystalline TiO2 thin films. The authors managed to achieve a dopant-free pure anatase nanocrystalline TiO2 thin film with a low band gap. Thorough investigations on the film's structure, optical characteristics, and surface morphology were conducted and presented.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Huijuan Li, Yeting Yao, Xiaoyan Yang, Xusheng Zhou, Ran Lei, Sufang He
Summary: This study prepared composites of titanium (IV) oxide combined with montmorillonite (MMT) for photocatalysis application. The immobilization of TiO2 nanoparticles on MMT decreased their average size and enhanced the photocatalytic activity. The phenol degradation process was determined by HPLC, showing the conversion of phenol into maleic acid, carbon dioxide, and small molecules.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Ceramics
Kevin Conley, Shima Moosakhani, Vaibhav Thakore, Yanling Ge, Joonas Lehtonen, Mikko Karttunen, Simo-Pekka Hannula, Tapio Ala-Nissila
Summary: Compact layers containing embedded semiconductor particles consolidated using pulsed electric current sintering exhibit intense, broadband near-infrared reflectance with up to 72% reflectance in the visible region. The composites have different microstructures and can scatter light at the air-matrix interface, achieving high reflectance with minimal dissipative losses.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jolanta Gasiorek, Anna Mazur-Nowacka, Anna Szczurek, Bartosz Babiarczuk, Wilhelm Jan Tic, Joanna Guzialowska-Tic, Jerzy Kaleta, Justyna Krzak
Summary: This study investigated organically modified silica (ORMOSIL)-zirconia coatings for enhancing corrosion and scratch resistance properties. Two different materials, SiO2/ZrO2 and SiO2/GPTMS/ZrO2, were synthesized, measured, and compared for performance differences. The SiO2/GPTMS/ZrO2 coating exhibited higher hardness and better corrosion mitigation compared to SiO2/ZrO2.
Article
Materials Science, Multidisciplinary
Kamila Startek, Anna Szczurek, Thi Ngoc Lam Tran, Justyna Krzak, Alicja Bachmatiuk, Anna Lukowiak
Summary: The study focused on sol-gel-derived coatings on polymeric foil, testing their structure, topography, and functional properties. The results showed that coatings with a higher content of fluorinated carbon atoms had increased hydrophobic character and lower oxygen permeation coefficients, indicating good barrier properties. Additional tests provided information on the thermomechanical properties, adhesion, and hardness of the coatings.
Article
Materials Science, Multidisciplinary
Oili M. E. Ylivaara, Andreas Langner, Xuwen Liu, Dieter Schneider, Jaakko Julin, Kai Arstila, Sakari Sintonen, Saima Ali, Harri Lipsanen, Timo Sajavaara, Simo-Pekka Hannula, Riikka L. Puurunen
Summary: The study investigated the optical properties, density, residual stress, elastic modulus, and hardness of ALD TiO2 thin films, revealing the complex influence of ALD temperature and film thickness on residual stress and mechanical properties. The results are helpful for designing optical devices with desired optical properties and optimizing post-ALD thermal budget to maintain the desired features of the films.
Article
Engineering, Mechanical
M. Erkin Cura, Michal Trebala, Yanling Ge, Piotr Klimczyk, Simo-Pekka Hannula
Summary: Oxygen vacancies in WO2.9 create easy shear planes, which can reduce friction in boundary lubrication conditions. The study found that the composite n-ZrO2 + 10 vol% WO2.9 had the lowest coefficient of friction and wear rate, thanks to WO2.9 acting as a solid lubricant.
Article
Materials Science, Multidisciplinary
Xuan Yang, Yuriy Yagodzinskyy, Yanling Ge, Eryang Lu, Joonas Lehtonen, Lauri Kollo, Simo-Pekka Hannula
Summary: The study found that the LPBF-produced CrFeNiMn alloy absorbed significantly more hydrogen than alloys produced using other sintering methods, including PECS CrFeNiMn alloy and conventional austenitic stainless steel. This is attributed to differences in the amount of hydrogen absorbed by the multi-component lattice, dislocation densities, width of segregation range, and vacancies in the rapid cooling process of LPBF. Additionally, analysis of the LPBF-transmission electron microscope specimen revealed stacking faults and cracks in the austenite, while scanning electron microscopy showed hydrogen-induced cracks and pits at grain boundaries.
Article
Nuclear Science & Technology
L. Malerba, M. J. Caturla, E. Gaganidze, C. Kaden, M. J. Konstantinovic, P. Olsson, C. Robertson, D. Rodney, A. M. Ruiz-Moreno, M. Serrano, J. Aktaa, N. Anento, S. Austin, A. Bakaev, J. P. Balbuena, F. Bergner, F. Boioli, M. Boleininger, G. Bonny, N. Castin, J. B. J. Chapman, P. Chekhonin, M. Clozel, B. Devincre, L. Dupuy, G. Diego, S. L. Dudarev, C-C Fu, R. Gatti, L. Gelebart, B. Gomez-Ferrer, D. Goncalves, C. Guerrero, P. M. Gueye, P. Hahner, S. P. Hannula, Q. Hayat, M. Hernandez-Mayoral, J. Jagielski, N. Jennett, F. Jimenez, G. Kapoor, A. Kraych, T. Khvan, L. Kurpaska, A. Kuronen, N. Kvashin, O. Libera, P-W Ma, T. Manninen, M-C Marinica, S. Merino, E. Meslin, F. Mompiou, F. Mota, H. Namburi, C. J. Ortiz, C. Pareige, M. Prester, R. R. Rajakrishnan, M. Sauzay, A. Serra, I Simonovski, F. Soisson, P. Spatig, D. Tanguy, D. Terentyev, M. Trebala, M. Trochet, A. Ulbricht, M. Vallet, K. Vogel, T. Yalcinkaya, J. Zhao
Summary: The M4F project aims to study the effects of radiation on F/M steels, integrating various experimental and computational materials science tools to understand and simulate the complex phenomena of radiation-induced defect formation and evolution. The project focuses on local deformation and ion irradiation effects, developing models and best practices, and is entering its fourth year, close to delivering high-quality results.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Shima Moosakhani, Hamidreza Daghigh Shirazi, Simo-Pekka Hannula
Summary: CuSbS2 nanotubes were successfully prepared using AAO template and hot-injection method, with an average diameter of 200 nm and a wall thickness of 40 nm. Optical and electrochemical characterizations showed that the CuSbS2 NTs exhibit p-type conductivity, suitable band gap, as well as valence band and conduction band positions comparable to conventional materials used in solar cells.
Article
Engineering, Manufacturing
Inigo Flores Ituarte, Frans Nilsen, Venkata Karthik Nadimpalli, Mika Salmi, Joonas Lehtonen, Simo-Pekka Hannula
Summary: Laser powder bed fusion (L-PBF) is used to produce foam-like Ni-Mn-Ga materials with tailored microscale and mesoscale features. The process parameters can be adjusted to control the material properties, such as microstructure and porosity. The results demonstrate the potential of L-PBF in producing complex materials with specific structures and properties.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Y. Ge, M. Vronka, P. Vertat, M. Karlik, S. P. Hannula, O. Heczko
Summary: Three possible twinning modes and corresponding twin boundaries in 2H martensite of Cu 69.4 Ni 3.4 Al 27.2 single crystal were studied. The results show that these twin boundaries have differences and are closely related to twinning stress or twin-boundary mobility.
Article
Nanoscience & Nanotechnology
Joonas Lehtonen, Pauli Lehto, Yanling Ge, Aapo Juselius, Simo-Pekka Hannula
Summary: Pulsed electric current sintering of gas atomized powder can achieve an equiatomic CrFeNiMn alloy, with ball milling of the starting powder leading to increased density and hardness, as well as decreased grain size of the sintered material. The decrease in grain size suppresses deformation twinning and promotes dislocation cell formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xuan Yang, Oleg Heczko, Joonas Lehtonen, Roy Bjoerkstrand, Mika Salmi, Volker Uhlenwinkel, Yanling Ge, Simo-Pekka Hannula
Summary: This research investigates the phase structure, hardness, and magnetic properties of an AlCoCr0.75Cu0.5FeNi alloy fabricated using laser powder bed fusion. The study reveals that laser power, scanning speed, and volumetric energy density affect the microstructure and properties of the alloy. The as-built specimens exhibit a body-centered cubic phase structure and have adjustable hardness and magnetization.
Article
Materials Science, Ceramics
Dorota Wojcik-Pastuszka, Justyna Krzak, Przemyslaw Przadka, Maria Twarda, Bogdan Osinski, Witold Musial
Summary: The aim of this study was to investigate the release of bupivacaine from proposed implants and test the storage stability. The implants were obtained using sol-gel method and the release of bupivacaine was analyzed using flow through cell connected to the UV-Vis spectrophotometer. The release profiles were analyzed using various kinetic models, and it was found that the zero-order or Higuchi equation best described the release profile of bupivacaine. The dissolution profiles of the drug were compared using statistical methods and it was revealed that there were differences between the release profiles.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jolanta Gasiorek, Anna Gasiorek, Bartosz Babiarczuk, Walis Jones, Wojciech Simka, Jerzy Detyna, Jerzy Kaleta, Justyna Krzak
Summary: This paper presents indirect methods to define the change in the rates of hydrolysis and condensation reactions of a silica oxide network. Different solvents used in the reaction environment were found to have a significant impact on the reaction rates and functional properties of the obtained silica coatings. The morphology and structure changes were investigated using various characterization techniques. The results showed that the coatings synthesized in a methanol environment had a higher polarization resistance, while the ethanol-based coatings had the greatest thickness. The acetone-based coatings exhibited higher detachment force. Propanol and butanol contributed to defects and decreased protection properties, particularly in coatings based on propanol. No statistically significant influence of solvents was observed on the thickness of coatings prepared with butanol or acetone.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Maciej Paszkowski, Piotr Aleksander Stelmaszek, Justyna Krzak
Summary: This study investigates the impact of mining pollutants and wear products on the rheological and tribological properties of lubricating grease. The study compares the fresh grease with the spent grease through rheological tests and tribological characteristics evaluation.
