Article
Anatomy & Morphology
Amir Zelati, Mohsen Mardani, Sahar Rezaee, Robert S. Matos, Marcelo A. Pires, Henrique D. da Fonseca Filho, Abhijeet Das, Fatemeh Hafezi, Ghasem Amraee Rad, Sanjeev Kumar, Stefan Talu
Summary: In this study, the morphological properties and micro-roughness of chromium thin films were analyzed using atomic force microscope (AFM) on different substrates of BK7, Silicon (Si), and glass, prepared by thermal evaporation technique and confirmed via EDS analysis. The analysis showed differences in the growth of chromium thin films between glass substrate and the other two substrates (BK7 and Si). Multifractality of the Cr thin films deposited on all studied substrates was observed, with glass substrates displaying the strongest multifractality indicating the distribution of space filling properties over more spatial scales compared to BK7 and Si samples.
MICROSCOPY RESEARCH AND TECHNIQUE
(2023)
Article
Materials Science, Multidisciplinary
Jan Dvorak, Jiri Vohanka, Vilma Bursikova, Daniel Franta, Ivan Ohlidal
Summary: This study presents a novel approach for characterizing the optical properties of inhomogeneous thin films, focusing on samples with absorption. Conventional methods of measuring the samples only from the film side can lead to unreliable results. To address this issue, depositing the thin films onto non-absorbing substrates to enable measurements from both sides of the sample is proposed. The results show excellent agreement between the fits and the measured data, providing validation of the overall characterization procedure and offering a more reliable method for optically characterizing inhomogeneous thin films.
Article
Chemistry, Physical
Ji-Yeon Chae, Donguk Lee, Da Won Lee, Ho-Young Woo, Jong Bae Kim, Taejong Paik
Summary: This study demonstrates the preparation of flexible thermochromic vanadium dioxide thin films with reversible phase transition behaviors and the effect of tungsten ion doping on the phase transition temperature. The flexible VO2 films showed high luminous transmittance and solar modulation ability, with VO2(M) doped with 1.3 at% of W exhibiting the highest reported values at near-ambient temperature.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
P. P. Sahay
Summary: Co3O4-NiO based nanocomposite films were electrochemically deposited onto FTO glass substrates in aqueous solutions with different mole ratios of cobalt (II) and nickel (II). The structural analysis revealed that the Co3O4 cubic phase dominated the composite films, leading to higher specific capacitance. The composite films showed different structures and exhibited higher specific capacitance due to the synergistic effect of the two metal oxides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Suzan Saber, Bernabe Mari, Andreu Andrio, Jorge Escorihuela, Nagwa Khattab, Ali Eid, Amany El Nahrawy, Mohamed Abo Aly, Vicente Compan
Summary: A new method for synthesizing nanopowders and thin films of CuInGaSe2 (CIGS) chalcopyrite material doped with Cr was presented, showing promising results for thin film solar cell applications. The electrical properties of the doped materials were found to be highly dependent on the Cr content, highlighting the potential for these materials as dopants in solar cell fabrication.
Article
Agricultural Engineering
Vadym Chibrikov, Piotr Mariusz Pieczywek, Justyna Cybulska, Artur Zdunek
Summary: This study examines the effect of hemicellulose addition on the elasto-plastic response of BC-hemicellulose composite films. The results show that different types of hemicellulose and their concentrations have opposite effects on the plastic deformation, maximum stress, and maximum strain of the composite films.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Engineering, Electrical & Electronic
C. M. Madrid Aguilar, A. Svalov, A. A. Kharlamova, E. E. Shalygina, A. Larranaga, I Orue, G. Kurlyandskaya
Summary: Thin Fe19Ni81 films were deposited onto COC flexible polymer substrates using magnetron sputtering technique. Different thicknesses of COC/FeNi composites were obtained and studied. The results showed that the thickness and transparency of the films influenced the protection and transmission of microwave signals, and even the thinnest film could be used as an effective shielding material for microfluidic devices.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Materials Science, Coatings & Films
Edyta Kobierska, Stanislav Zak, Sabrina Hirn, Megan J. Cordill, Robert Franz, Marisa Rebelo de Figueiredo
Summary: In this study, the tribological properties of Mo films deposited on polyimide substrates were assessed using the ball-on-disc test. The wear mechanisms and induced stresses were analyzed by microscopy and simulation, providing insights into the tribological response of metallic films on compliant substrates.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Polymer Science
Dexin Chen, Zhixin Kang, Wei Li
Summary: Thin Ag films were successfully prepared on flexible substrates with adjustable properties through a simple spray process, showing high efficiency as electromagnetic interference shielding material and maintaining high electrical conductivity even under stretching.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Mona A. A. Mohaseba, Ahmed A. A. Aboud
Summary: This study investigated the impact of lead concentration (0-1 wt%) on the physical properties and photo-detection properties of zinc oxide thin films. All films were deposited using Aerosol Assisted Chemical Vapor Deposition (AACVD) techniques and characterized through various methods. X-ray diffraction analysis revealed the formation of single-phase hexagonal ZnO thin films with preferred orientation changes at a Pb concentration of 0.5wt%. The formation of nano-rods was observed in films prepared with 0.5 and 1wt% lead. The band gap values increased with increased Pb doping. The deposited films exhibited high sensitivity to UV light after long exposure.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Coatings & Films
G. Yumusak, A. Leyland, A. Matthews
Summary: In this study, the structure, mechanical properties, and abrasion resistance of two triode-plasma nitrided titanium alloys were investigated. The use of metallic alpha-Ti or 13-TiNb layers pre-coated by physical vapour deposition (PVD) was explored. The results showed that the nitrided samples had increased nitrogen concentration, surface hardness, and surface roughness. However, the use of PVD pre-deposition of nanostructured metallic coatings prior to nitriding reduced surface roughening effects. The microabrasion resistance of Ti-6Al-4V substrates with Ti and TiNb coatings was significantly enhanced after nitriding treatment.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
S. Leith, J. Qiao, M. Vogel, E. Seiler, R. Ries, Y. Li, C. Wiktor, J. Mueller, Y. Sakalli, B. Butz, X. Jiang
Summary: The use of energetic condensation techniques, such as HiPIMS, has the potential to improve the superconducting performance of coated Cu cavities by producing bulk-like Nb thin films. However, a deeper understanding of the effects of deposition parameters, film properties, and superconducting performance is needed. This study explores the effects of different HiPIMS deposition parameters on the morphological, crystallographic, and superconducting properties of Nb thin films deposited onto electropolished Cu substrates. Higher duty cycles, surface smoothness, and transition zones in film growth are observed.
Article
Materials Science, Multidisciplinary
Ehud Almog, Vadim Derkach, Amit Sharma, Amy Novick-Cohen, Julia R. Greer, Eugen Rabkin
Summary: The solid state dewetting of nanocrystalline Au thin films deposited on prismatic single crystalline KCl whiskers in a three-dimensional setting was studied, revealing faster dewetting along the whisker edges than on the side facets. A numerical model was developed to describe the growth of anisotropic elliptical holes in the thin film, elongated along the whisker axis. The change in orientation relationship between Au grains and KCl whisker along the whisker edges was identified as an important factor in the experimental results.
Article
Chemistry, Multidisciplinary
Brid Murphy, Jhonattan Baez, Mick A. Morris
Summary: Although titanium, stainless steel, and cobalt-chrome alloys are commonly used in orthopaedic implant devices, there are significant advantages in using alternative non-metallic substrates. This study aims to develop a wet chemical coating process for growing hydroxyapatite films on non-metallic surfaces, and the results show that a range of substrates can be coated using this technique. The research provides detailed characterization of the coated films and investigates the growth mechanism of hydroxyapatite.
Article
Engineering, Mechanical
Kun Shu, Chuanwei Zhang, Dong Sun, Bo Wu, Zhen Li, Jiqiang Wu, Dezhi Zheng, Le Gu
Summary: The study found that substrate plastic deformation affects the cracking and delamination damage of thin solid lubricating films in sliding contacts. A softer substrate leads to parallel cracks in the film, while a harder substrate leads to angular cracks in the film, causing fragmentation and spallation.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Polymer Science
L. A. Can-Herrera, A. I. Oliva, M. A. A. Dzul-Cervantes, O. F. Pacheco-Salazar, J. M. Cervantes-Uc
Summary: The study investigates the effect of applied voltage on electrospun PCL scaffolds, finding that increasing voltage significantly affects the morphology and mechanical properties of the fibers. This has important implications for tissue engineering applications.
Article
Polymer Science
Alejandro Avila-Ortega, Jose Pablo Avalos-Hernandez, Rudy Trejo-Tzab, Andres Ivan Oliva, Juan Antonio Juarez-Moreno
Summary: The article presents a new oil/water emulsion separation technology using nanoparticle-decorated membranes, characterized through various analytical methods, demonstrating their separation efficiency and antifouling ability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Coatings & Films
I. J. Gonzalez-Chan, A. Pat-Herrera, A. Trejo-Ramos, A. Oliva
Summary: Zinc sulphide thin films were synthesized using the chemical bath deposition technique without the use of a complexing agent. The presence of zinc-hydroxide ions and alkaline pH was found to be necessary for the growth of ZnS, with samples deposited at higher pH values showing improved physicochemical properties. Additional chemical baths using NH3 as a complexing agent resulted in inferior properties compared to the samples deposited without a complexing agent at 40 degrees C, validating the methodology.
SURFACE ENGINEERING
(2021)
Article
Engineering, Biomedical
Georgina Alejandra Venegas-Cervera, Andres Ivan Oliva, Alejandro Avila-Ortega, Jose Manuel Cervantes-Uc, Leydi Maribel Carrillo-Cocom, Juan Antonio Juarez-Moreno
Summary: Electrospun polyurethane membranes were fabricated using arginine as chain extender to test fibroblasts affinity and adhesion, with results indicating greater fluorescent surface area on dense control membranes made from Tecoflex compared to electrospun and dense PUUR. SEM analysis revealed the well-spread shape of cells on electrospun membranes, attributing to the fiber's structure. Cell morphology and attachment assay results showed a good response related to cell adhesion on the surface of electrospun PUUR membranes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2021)
Article
Chemistry, Multidisciplinary
R. Perez-Gonzalez, S. Cherepanov, A. Oliva, A. Zakhidov, A. Encinas, H. Flores-Zuniga, S. Diaz-Castanon, J. Oliva
Summary: This study presents the electrochemical characterization of flexible carbon nanotube-based asymmetric supercapacitors made with biodegradable components, where BaFeO nanoparticles were introduced to enhance performance. The results showed significant improvement in capacitance and energy density after decorating the anodes with BaFeO NPs. Additionally, stable output voltage and the presence of redox centers for charge storage were observed, indicating the potential for developing new biodegradable supercapacitors with high capacities similar to batteries.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Physical
A. Trejo-Ramos, P. E. Martin-Varguez, I. J. Gonzalez-Chan, A. Oliva
Summary: The algorithm presented in this work enables the determination of species distribution diagrams and solubility curves in a chemical bath system, facilitating the synthesis of high-quality ZnO, ZnS, or Zn(OH)2 films. By identifying all formed species, chemical conditions can be obtained in a temperature range from 25 degrees C to 90 degrees C. The better conditions for obtaining the mentioned films are explained and justified through optical, morphological, and structural characterizations.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2021)
Article
Crystallography
Reina Galeazzi Isasmendi, Isidro Juvenal Gonzalez Panzo, Crisoforo Morales-Ruiz, Roman Romano Trujillo, Enrique Rosendo, Ivan Garcia, Antonio Coyopol, Godofredo Garcia-Salgado, Rutilo Silva-Gonzalez, Ivan Oliva Arias, Carolina Tabasco Novelo
Summary: The study involved depositing Copper oxide (CuO) films on glass substrates using microwave assisted chemical bath deposition method with varying pH values. The experiments showed that the CuO films obtained had monoclinic crystalline phase, nanostructured surface morphology, stoichiometric Cu/O ratio of 50/50 at%, and a band-gap energy value of 1.2 eV.
Article
Crystallography
I. J. Gonzalez-Panzo, C. Tabasco-Novelo, E. Rosendo, A. Oliva, R. Romano-Trujillo, R. Galeazzi, C. Morales, G. Garcia, A. Coyopol
Summary: ZnSe nanoparticles were synthesized in aqueous colloidal solution at different pH levels and temperature. Physicochemical analysis was conducted to study the formation and growth process of ZnSe-NPs. Characterization of the ZnSe-NPs was performed using XRD, Raman spectroscopy, SEM, and EDS techniques, revealing mixed cubic and hexagonal structures with nanoscale crystal sizes.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Physics, Applied
E. Figueroa-Gonzalez, R. Mendoza, A. Oliva, C. Gomez-Solis, L. S. Valle-Garcia, E. Oliva, V Rodriguez-Gonzalez, A. Encinas, J. Oliva
Summary: We report on the fabrication and electrochemical characterization of biodegradable and flexible supercapacitors. These supercapacitors use graphene nanoplates coated coconut fibers as conductive electrodes, an oral electrolyte solution and rice paper as electrolyte and separator. By adding MgTiO3 nanoparticles to the anode, the capacitance and specific energy of the supercapacitors were enhanced. The biodegradable cells exhibited long discharge times and stable output voltage, which have not been observed previously for such supercapacitors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Composites
Ivan Perez, Samuel Flores, Cesar Ortiz, Miguel Rivero, Jose Emilio Corona, Andres Ivan Oliva, Francis Aviles
Summary: The dispersion state of multilayer graphene sheets in polymers significantly affects the properties of nanocomposites. By adjusting roller gaps and processing cycles, smaller and more densely packed agglomerates can be achieved, impacting the electrical conductivity and mechanical properties of the nanocomposites. The density of agglomerates plays a key role in governing the piezoresistive sensitivity.
POLYMER COMPOSITES
(2022)
Article
Energy & Fuels
R. Mendoza, J. Oliva, K. P. Padmasree, A. Oliva, A. Mtz-Enriquez, A. Zakhidov
Summary: The study demonstrated that incorporating CaCo oxide into solid state supercapacitors made from surgical face mask waste and blister packs recycled from paracetamol packaging can significantly improve energy density and capacitance. The devices showed high capacitance retention even under pressure conditions, with minimal decrease in capacitance. Analysis also revealed the presence of additional redox species and oxygen vacancies, indicating the ability of the devices to store charge efficiently through redox reactions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
A. Molina, A. Oliva, A. Zakhidov, E. Valadez-Renteria, V Rodriguez-Gonzalez, A. Encinas, J. Oliva
Summary: This work presents the fabrication of flexible and biodegradable sensors for NO2 detection. The sensors show active sites on their surface for gas detection and exhibit advantages of low power consumption and recoverability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Chemical
Luis Alfonso Can-Herrera, Andres Ivan Oliva, Jose Manuel Cervantes-Uc
Summary: Polycaprolactone (PCL) and poly(lactic acid) (PLA) are two polymers with unique properties, and their blending can produce a new biodegradable material with balanced properties. However, both PCL and PLA are highly hydrophobic materials. The surface characteristics of electrospun PCL/PLA blends can be improved by air plasma treatment and adjusting the content of its components.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Energy & Fuels
E. Figueroa-Gonzalez, A. Oliva, V Rodriguez-Gonzalez, C. Gomez-Solis, C. R. Garcia, J. Oliva
Summary: Recycling materials containing plastics is important for environmental protection, as they can contribute to microplastic contamination in oceans and rivers. By using recycled tetrapak/graphene and Ag/BaMoO4 nanoparticles, the researchers fabricated supercapacitors with improved capacitance, energy density, and stability. This study demonstrates that utilizing recycled materials like tetrapak can reduce costs and plastic pollution in the environment.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Jinrong Yin, Jialun Li, Liying Wang, Bin Cai, Xijia Yang, Xuesong Li, Wei Lu
Summary: This study provides a simple and feasible method to fabricate a monomer photovoltaic electrochromic supercapacitor device by integrating dye-sensitized solar cells (DSSC) and electrochromic supercapacitors (ESC). The device exhibits high specific capacitance, excellent capacitance retention, and fast coloring/discoloring response. The multifunctional smart window can be used not only as a typical electrochromic window but also as an energy storage device simultaneously, showing great potential for various applications.
JOURNAL OF ENERGY STORAGE
(2022)