Article
Materials Science, Coatings & Films
Navnath Kalel, Ashish Darpe, Jayashree Bijwe
Summary: Optimizing the power and duration of plasma exposure can increase the surface energy and lap shear strength of different stainless steels. Argon LPP is more effective than argon-oxygen LPP, and the best results were achieved with a plasma exposure of 500 W power for 20 min.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Can Zhang, Huimin Fan, Xinlong Chen, Hui Xu, Jiatao Lou, Yao Li, Yunhui Huang, Sa Li
Summary: Metal foils like gold are used for packaging and decoration, while lithium foils play a key role in the battery industry. Technological advancements have enabled the fabrication of ultra-thin lithium foils, leading to improved cycle life and performance of rechargeable batteries.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Polymer Science
Emma Birleanu, Ilarion Mihaila, Ionut Topala, Catalin Borcia, Gabriela Borcia
Summary: This study investigates the effects of atmospheric-pressure plasma (APP) treatment on non-polar polymers and finds that short treatment times can significantly change the surface properties of the polymers, which remain stable after treatment.
Article
Multidisciplinary Sciences
Mohammad Reza Yari, Mohammad Sadegh Zakerhamidi, Hamid Ghomi
Summary: The effects of argon gas glow discharge plasma on the surface of DR1 dye-loaded PMMA polymer films were investigated. The plasma treatment immobilized the dye on the polymer surface through the activation of the surface and the formation of covalent bonds. Additionally, the plasma modification altered the surface topography, adjusted the dye conformation, and created new polar components, resulting in enhanced dye adsorption to the polymer matrix. This study suggests a novel and cost-effective technique for the fabrication of poly(MMA-co-DR1) copolymer with a homogeneous surface layer.
SCIENTIFIC REPORTS
(2022)
Article
Polymer Science
Stepanka Kelarova, Monika Stupavska, Vojtech Homola, Roman Pribyl, Lukas Zabransky, Anna Charvatova Campbell, Marek Havlicek, Richard Vaclavik, Vilma Bursikova
Summary: In this study, SiOxCyHz coatings were prepared in capacitively coupled RF glow discharge from a mixture of TMSAc monomer and oxygen. The properties of the coatings and their stability in air and water environments were examined. Increasing oxygen ratio and pulse repetition frequency improved the resistance of the coatings to the atmospheric environment, while organosilicon coatings prepared in CW mode with high oxygen ratios showed significant delamination after immersion in water. Use of PW plasma improved the stability of the coatings under water environment.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Chemistry, Physical
Sabria Benrabah, Maxime Legallais, Pascal Besson, Simon Ruel, Laura Vauche, Bernard Pelissier, Chloe Thieuleux, Bassem Salem, Matthew Charles
Summary: This study explores the impact of several wet etchants commonly encountered in the microelectronic industry on the surface chemistry of GaN on silicon. Phosphoric acid treatment is found to significantly modify the surface and enable the recovery of the surface morphology. The study proposes a promising treatment method for the recovery of good quality GaN surfaces after dry etching.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Annalisa Cardellini, Francesco Maria Bellussi, Edoardo Rossi, Lorenzo Chiavarini, Claude Becker, David Cant, Pietro Asinari, Marco Sebastiani
Summary: This study demonstrates that accurate refinement of atmospheric plasma technique can achieve polymeric coating near the super-hydrophobic regime, and proposes a reliable workflow for surface characterization and smart design. By quantitatively distinguishing the contribution of a PFDA coating, the role of surface chemistry and roughness in reducing surface free energy is decoupled, highlighting the synergistic combination of models and experiments in designing low-free-energy surfaces.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Ivana Mrsic, Tim Baeuerle, Steffen Ulitzsch, Guenter Lorenz, Karsten Rebner, Andreas Kandelbauer, Thomas Chasse
Summary: A systematic study was conducted on the oxygen plasma surface modifications of polyurethane and cross-linked ethylene-propylene rubber, with oxygen pressure identified as the most impactful factor leading to increased surface energy and polarity at low pressures.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Physical
Rouba Ghobeira, Parinaz Saadat Esbah Tabaei, Rino Morent, Nathalie De Geyter
Summary: Non-thermal plasma surface functionalization of polymeric materials has gained increasing attention in various application fields in recent decades. However, the diversity of chemical reactions occurring between the surface and the active species in plasma can result in non-specific surface functional groups. Achieving controlled surface chemistries can be challenging as it requires optimization of working parameters and comprehensive analysis of plasma-surface interactions.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Zhijuan Zhao, Zhen Yuan, Xiaoyu Zhang, Fen Liu
Summary: The development of a cryogenic air-free sample transfer system enables the XPS measurement of volatile solid samples and even liquid-phase materials, demonstrating its effectiveness in analyzing the accurate chemical composition and structure of volatile samples. This system provides a solution for surface analysis challenge of volatile samples when using a traditional X-ray photoelectron spectrometer.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
N. G. Korobeishchikov, I. Nikolaev, V. V. Atuchin, I. P. Prosvirin, A. Tolstogouzov, V Pelenovich, D. J. Fu
Summary: The study shows that a combination of high- and low-energy treatment modes can provide an efficient etching rate comparable to that of a monoatomic ion beam, reducing surface roughness to the angstrom level. XPS measurements reveal the preferential sputtering of oxygen and boron, as well as an increase in the concentration of lithium cations in both modes. While chemical alterations in the treated materials cannot be fully prevented, the damages from a cluster bombardment are much less than that from a monoatomic ion beam.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
E. Abdel-Fattah, S. Alotibi
Summary: This research investigated the synergetic effect of nonthermal plasma and ZnO nanoparticles on the degradation efficiency of methylene blue. The results showed that combining plasma with the right amount of ZnO can significantly enhance the degradation efficiency by providing additional hydroxyl radicals and exciting the ZnO catalyst.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Mohamed Mounder Kouicem, Eric Tomasella, Bousquet Angelique, Nicolas Batisse, Guillaume Monier, Christine Robert-Goumet, Laurent Dubost
Summary: This study focuses on understanding the adhesion phenomena between PMMA and metallic aluminum films, and found that oxygen-rich and short duration plasma pre-treatment significantly increase PMMA's adhesiveness. Contact angle measurements, XPS analysis, and AFM analyses were utilized to validate the results.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Francesco Perricelli, Massimo Boscaglia, Massimiliano Cantiano, Luca Spitaleri, Maria Elena Fragala, Antonino Gulino
Summary: In this study, the morphological and chemical modifications of fluorinated photodefinable polybenzoxoles (F-PBOs) induced by Ar plasma treatments were investigated using atomic force microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. This process, which aims to remove surface contaminants and increase surface roughness for better adhesion, is crucial in the manufacturing of microelectronic devices. The study found that Ar plasma treatments significantly increase the polymer surface roughness but also lead to the formation of unwanted silver fluoride species when a patterned silver layer is present on F-PBO.
Article
Energy & Fuels
Ke Wang, Kevin G. Taylor, Lin Ma
Summary: Atomic force microscopy (AFM) is a widely used tool in materials science and chemistry research, and is becoming increasingly important in energy geosciences. Its ability to provide continuous non-destructive measurements of sample surfaces makes it valuable for studying the structure of geological materials.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Materials Science, Multidisciplinary
M. Afifi, M. K. Ahmed, Hala A. Ibrahium, Nasser S. Awwad, Ali A. Shati, E. Abdel-Fattah
Summary: Hydroxyapatite doped with different concentrations of vanadate ions was synthesized using the co-precipitation method. The structural properties were investigated using XRD, while the morphological features were studied using FESEM. Additionally, the mechanical properties were measured using the ultrasonic technique. The results showed that the addition of vanadate ions led to a decrease in crystallite size, an increase in lattice distortion, and an enlargement of grain size. The hardness and cell viability of the material exhibited a certain concentration dependence.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
M. Afifi, M. K. Ahmed, Hala A. Ibrahium, Nasser S. Awwad, E. Abdel-Fattah, Mohammad Y. Alshahrani
Summary: This study investigated nanocomposites based on hydroxyapatite (HAP), which showed improved human osteoblast viability and excellent antibacterial activity when combined with CuO and GO. The results suggest that the biomaterials have great biocompatibility for biomedical applications.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Mehrez E. El-Naggar, Ola A. Abu Ali, Dalia Saleh, M. A. Abu-Saied, M. K. Ahmed, E. Abdel-Fattah, S. F. Mansour
Summary: Nanocomposites based on hydroxyapatite, including MoO3, HAP/MoO3, HAP/GO, and HAP/MoO3/GO, were studied for biological applications. Different compositions were analyzed using various techniques, revealing that the HAP/MoO3/GO composite exhibited the highest cell viability and best antibacterial performance.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Polymer Science
Mehrez E. El-Naggar, Ola A. Abu Ali, M. A. Abu-Saied, M. K. Ahmed, E. Abdel-Fattah, Dalia Saleh
Summary: Nanocomposites consisting of HAP, CdSe, and GO were studied for their morphology, structure, and chemical composition. The ternary nanocomposite showed enhanced corrosion resistance, antibacterial activity, and good cell viability towards osteoblasts. The release of Cd2+ and Ca2+ ions increased with exposure time, reaching certain concentrations.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Analytical
Mehrez E. El-Naggar, Ola A. Abu Ali, Dalia I. Saleh, M. A. Abu-Saied, M. K. Ahmed, E. Abdel-Fattah, S. F. Mansour
Summary: This study investigated the effect of different magnesium ion contents incorporated into hydroxyapatite (HAP) and modified with selenite ions on the degradation performance of methylene blue. The results showed that even at a low ratio, magnesium ions induced changes in the microstructure, morphology, surface area, external surface charge, particle size, and degradation performance of HAP.
Article
Chemistry, Analytical
Mehrez E. El-Naggar, Ola A. Abu Ali, Dalia Saleh, M. A. Abu-Saied, M. K. Ahmed, E. Abdel-Fattah, S. F. Mansour
Summary: By combining hydroxyapatite (HAP), graphene oxide, and vivianite in a ternary nanocomposite with three phases and shapes, the cell viability of osteoblast cells was increased to 97.6% +/- 4 in vitro. The nanocomposite showed decreased crystal size, increased roughness peak height, and exhibited antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), making it suitable for various medical applications.
Correction
Chemistry, Multidisciplinary
Sherif Ashraf, M. K. Ahmed, Hala A. Ibrahium, Nasser S. Awwad, E. Abdel-Fattah, M. G. Ghoniem
Summary: Correction for the study on nanofibers of polycaprolactone containing hydroxyapatite doped with aluminum/vanadate ions for wound healing applications, by Sherif Ashraf et al., New J. Chem., 2021, DOI: 10.1039/d1nj03455c.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Dalia I. Saleh, Mehrez E. El-Naggar, Ola A. Abu Ali, M. A. Abu-Saied, M. K. Ahmed, E. Abdel-Fattah, Manal F. Abou Taleb, Salem R. Salem
Summary: The sequence of co-doped HAP/PCL nanofibrous composites with different amounts of zinc has been prepared and tested. The introduction of zinc affects the grain size, fiber size, surface roughness, cell viability, and antibacterial ability of the materials in a positive way.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Electrical & Electronic
Daisuke Ogawa, Essam Mohammed Abdel-Fattah, Keiji Nakamura
Summary: This article reports on a study investigating the relationship between the density of active species in nitrogen-oxygen plasma and the level of NCO functionalization on multiwalled carbon nanotubes. The results suggest that NCO groups on carbon nanotubes increase when the ratio of atomic nitrogen and oxygen in the plasma is equal.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2022)
Article
Materials Science, Ceramics
N. S. Al-Bassami, S. F. Mansour, E. Abdel-Fattah, M. A. Abdo
Summary: A novel spinel Co0.5Mn0.25Zn0.25CexFe2-xO4 (CMZCF0-CMZCF5) nanoferrite photocatalyst was prepared and characterized for methylene blue (MB) dye degradation. The CMZCF nanoferrites exhibited smaller band gap energies and enhanced photocatalytic performance compared to pure ferrite. The addition of Ce cations decreased electron-hole pairs recombination and increased the material's ability to absorb visible light. The CMZCF5 nanoferrite showed a maximum MB removal efficiency of 97.01% under solar light.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Abdulrahman I. Alharthi, E. Abdel-Fattah, Justin S. J. Hargreaves, Mshari A. Alotaibi, Israf Ud Din, Matar N. Al-Shalwi
Summary: Zinc and nickel incorporated CoFe2O4 materials were synthesized and characterized using various techniques. The results showed that Ni incorporation preserved the structure of CoFe2O4, while Zn incorporation changed its microstructure. The oxidation states of the elements were confirmed, and cation redistribution was observed upon incorporation. BET surface area analysis revealed the different effects of Ni and Zn incorporation on the surface area of CoFe2O4. Catalytic activity evaluation demonstrated that Ni incorporation improved methane conversion and hydrogen formation rate, while Zn incorporation had low catalytic activity. The results were strongly correlated with the characterization of the spent catalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Omar F. Farag, E. Abdel-Fattah
Summary: Thin films of polyvinyl alcohol (PVA) loaded with various concentrations of f-MWCNTs were prepared and their physicochemical characteristics were investigated. XRD, FTIR, XPS, UV-Vis, and TGA techniques were used. The results indicated improved crystallinity, hydrogen bond formation, decreased optical band gap, and increased optical conductivity, dielectric constant, AC conductivity, and thermal stability with increasing wt% of f-MWCNTs in the PVA matrix.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Abdulrahman I. Alharthi, E. Abdel-Fattah, Mshari A. Alotaibi, Israf Ud Din, Amal A. Nassar
Summary: Cobalt ferrite was used as a catalyst in the direct methane cracking process. Increasing the reaction temperature increased methane conversions and hydrogen formation rate, but decreased catalyst stability and induction period. Gas flow rate higher than 20 mL/min reduced the catalytic activity of CoFe2O4. The spent catalyst analysis showed that CoFe alloy was the active phase for methane cracking.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
Article
Polymer Science
E. M. Abdelfattah, H. Elzanaty, W. B. Elsharkawy, M. A. Azzam, Z. M. Elqahtani, S. Alotibi, M. Alyami, T. Fahmy
Summary: Poly (vinyl alcohol)/chitosan/ZnO (PVA/Cs/ZnO) nanocomposite films were prepared through an environmentally friendly approach and characterized using various techniques. The results showed that the PVA/Cs blend matrix encapsulated the ZnO nanoparticles. The addition of ZnO NPs increased the glass transition and melting temperature values of the PVA/Cs blend. The ATR-FTIR spectra indicated the existence of hydrogen bonding between the OH groups of PVA/Cs and ZnO nanoparticles. The nanocomposites exhibited better thermal stability and enhanced optical properties with increasing concentration of ZnO nanoparticles. Moreover, PVA/Cs/ZnO nanocomposites showed significant antibacterial activity.
Article
Chemistry, Multidisciplinary
E. Abdel-Fattah, S. Alotibi
Summary: This research investigated the synergetic effect of nonthermal plasma and ZnO nanoparticles on the degradation efficiency of methylene blue. The results showed that combining plasma with the right amount of ZnO can significantly enhance the degradation efficiency by providing additional hydroxyl radicals and exciting the ZnO catalyst.
APPLIED SCIENCES-BASEL
(2023)
