Article
Engineering, Electrical & Electronic
O. F. Goktas, N. E. Koksal, O. Kaplan, A. Yildiz
Summary: The sol-gel method was used to fabricate Al-doped ZnO (AZO) thin films on p-Si substrates with smooth surfaces and highly oriented crystal structures. The analysis revealed that the AZO/Si heterojunctions exhibited nonideal diode behavior, with the 80 nm thick AZO layer demonstrating good rectifying properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Habib Chenaina, Charfeddine Messaadi, Jalila Jalali, Hatem Ezzaouia
Summary: This study focuses on sol-gel derived SnO2-TiO2 thin films deposited on silicon wafer type Si (100) substrate using spin coating technique, followed by heat treatments at four different temperatures. XRD characterization reveals the formation of nano-crystalline phase at 400 degrees C and further crystallization with increasing annealing temperature. Optical and dielectric properties analysis demonstrates universal many body response over a broad frequency range, presenting variations in structure and performance of the films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Simona Liliana Iconaru, Daniela Predoi, Carmen Steluta Ciobanu, Mikael Motelica-Heino, Regis Guegan, Coralia Bleotu
Summary: This study investigates the properties of silver doped hydroxyapatite thin films and reveals their excellent antimicrobial properties and biocompatibility, making them highly promising for biomedical applications.
Article
Chemistry, Inorganic & Nuclear
Jin Chen, Lu Liu, Lu Zheng, Min Liu, Yuyu Gao, Kun Zhao
Summary: In this study, the optical properties of TiO2 were modified by incorporating magnetic carbon-coated iron (Fe@C) nanoparticles. Firstly, Fe@C nanoparticles were prepared, and then TiO2 sol doped with Fe@C nanoparticles was synthesized. Thin films of Fe@C doped TiO2 were prepared, and the effects of different Fe@C contents on the surface structure and optical properties were studied.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Mohammad Humaun Kabir, Humayra Ibrahim, Sikder Ashikuzzaman Ayon, Md. Muktadir Billah, Sharif Neaz
Summary: In this study, undoped and Fe-doped CuO thin films were prepared using the sol-gel spin coating technique. It was found that Fe doping improved the particle size and distribution, and tuned the bandgap of the films. In addition, the films showed good optical properties and antifungal activity.
Article
Materials Science, Multidisciplinary
J. A. Berumen-Torres, J. G. Quinones-Galvan, H. Duran-Munoz, C. H. Guzman, G. Torres-Delgado, J. J. Ortega-Sigala, J. J. Araiza-Ibarra, R. Castanedo-Perez
Summary: The addition of tin can reduce the resistivity of zinc oxide films, with decreased grain size as tin content increases. Further improvement in film properties can be achieved with a thermal treatment in vacuum.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Chemistry, Physical
Boying Wang, Hao Wang, Jiantao Wang, Chaolong Li, Feng Wang, Chunli Diao, Haiwu Zheng
Summary: In this study, lead-free 0.8STO-0.2BFO thin films with coexisting amorphous and nanocrystalline structure were prepared by a sol-gel method. By adjusting the heat-treatment temperature to form polar-nano regions, the energy storage density of the films was increased. The optimized 0.8STO-0.2BFO film exhibited excellent energy storage properties with high discharge energy storage density, temperature and frequency stability, as well as fatigue endurance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
Engineering, Electrical & Electronic
G. Ramanathan, K. R. Murali
Summary: Various metal oxide semiconductors, especially those exploiting the junction between p-type and n-type semiconductors, play a significant role in the field of electronics. Indium oxide doped with tin (ITO) is a commonly used substrate material due to its low resistivity and high optical transmittance in the visible region. In this study, ITO films with different tin concentrations were prepared using the acrylamide sol gel dip coated method, and their optical properties were investigated.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Coatings & Films
Muhammad R. Islam, Muhammad G. Azam
Summary: Undoped ZnO and Mg-doped ZnO thin films were synthesized by sol-gel dip-coating technique. The study showed that Mg doping increased the porosity of the films, decreased their crystallinity, and led to the formation of localized energy states. The enhanced photocatalytic efficiency of Mg-doped ZnO thin films was attributed to charge trapping by localized states and an increase in surface area due to porosity induced by Mg doping.
SURFACE ENGINEERING
(2021)
Review
Materials Science, Ceramics
Sergio Obregon, Vicente Rodriguez-Gonzalez
Summary: The use of nanostructured coatings is crucial to maintain clean surfaces in public spaces, with TiO2 thin films and coatings offering outstanding properties such as chemical stability, reusability, hydrophilicity, and activation by sunlight. These coatings are suitable for commercial devices that keep public surfaces clean and can have environmental and energy applications in purification, gas sensing, production of renewable fuels, and antimicrobial features.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
N. R. Aswathy, JiJi Varghese, Shree Ranjini Nair, R. Vinod Kumar
Summary: The research investigated the structural, morphological, optical, and magnetic properties of Mn-doped NiO thin films, revealing that Mn doping alters the lattice parameters and introduces strain in NiO films, while increasing Mn content decreases the intensity of the Photoluminescence spectra.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Simona Liliana Iconaru, Carmen Steluta Ciobanu, Daniela Predoi, Mikael Motelica-Heino, Constantin Catalin Negrila, Monica Luminita Badea, Mihai Valentin Predoi, Carmen Mariana Chifiriuc, Marcela Popa
Summary: This research presents the results of a study on hydroxyapatite thin films co-doped with nitrogen and bromine for the first time, obtained through an adapted co-precipitation method. The thin layers showed superior morphological properties and exhibited good antimicrobial activity against bacterial and fungal strains in vitro. The successful obtainment of N and Br co-doped hydroxyapatite suspension was highlighted, showing potential for applications in biomaterials.
Article
Materials Science, Ceramics
L. Imhoff, A. Roman, S. A. Barolin, N. S. Pellegri, L. B. Steren, M. H. Aguirre, M. G. Stachiotti
Summary: This study demonstrates the presence of multiferroic and weak ferromagnetic behavior in the compound at room temperature. The multiferroic behavior in the films occurs in a different concentration range.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Xinkun Liu, Ying Dai, Xinmei Pei, Wen Chen
Summary: Lead-free Sr-doped BCZT thin films were successfully prepared and their structure, electric properties and ECE were investigated. The results show that the phase transition temperatures of the films change with increasing Sr content and merge at room temperature. The BCZT-0.05Sr film exhibits a giant ECE near room temperature.
CERAMICS INTERNATIONAL
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Izabela Strzeminska, Cecile Factor, Javier Jimenez-Lamana, Sabrina Lacomme, Maria Angels Subirana, Philippe Le Coustumer, Dirk Schaumloffel, Philippe Robert, Joanna Szpunar, Claire Corot, Ryszard Lobinski
Summary: This study aimed to identify the speciation of gadolinium (Gd) retained in the deep cerebellar nuclei (DCN) of rats administered with gadoterate or gadodiamide. The results showed that the form of Gd in the DCN differed between the two contrast agents. For gadoterate, the majority of Gd was present in the soluble fraction, while for gadodiamide, most of the Gd was in the form of insoluble particulate species. This study provided important evidence for the dechelation of linear GBCAs and offered insights into the mechanisms of Gd deposition in the brain.
INVESTIGATIVE RADIOLOGY
(2022)
Article
Pathology
Yassine Bouchoucha, Arnault Tauziede-Espariat, Arnaud Gauthier, Delphine Guillemot, Dorian Bochaton, Julien Vibert, Matthieu Carton, Sarah Watson, Sandrine Grossetete, Chloe Quignot, Daniel Orbach, Nadege Corradini, Gudrun Schleiermacher, Franck Bourdeaut, Marie Simbozel, Christelle Dufour, Veronique Minard-Colin, Mehdi Brahmi, Franck Tirode, Daniel Pissaloux, Marie Karanian, Marie-Christine Machet, Julien Masliah-Planchon, Olivier Delattre, Liesbeth Cardoen, Gaelle Pierron, Francois Doz
Summary: BCOR-ITD tumors represent a family of aggressive entities affecting young children, with poor prognosis except for clear cell sarcoma of the kidney (CCSK). Clinical, radiological, histopathological, and molecular findings differ among CNS BCOR-ITD and BCOR-ITD sarcomas, potentially due to differences in cells of origin.
JOURNAL OF PATHOLOGY CLINICAL RESEARCH
(2022)
Article
Medicine, General & Internal
Radu Hristu, Lucian G. Eftimie, Stefan G. Stanciu, Remus R. Glogojeanu, Pavel Gheorghita, George A. Stanciu
Summary: Two-photon microscopy is a non-linear optical imaging method that can be used to investigate fixed tissue sections, fresh tissue, and even in vivo experiments. It utilizes two non-linear optical contrast mechanisms, two-photon excited fluorescence and second harmonic generation, to provide complementary information on tissue architecture. The study demonstrates that two-photon microscopy can detect specific cellular features of extramammary Paget disease in good correlation with histopathological results.
FRONTIERS IN MEDICINE
(2022)
Article
Environmental Sciences
Nini Sane, Malick Mbengue, Amandine Laffite, Serge Stoll, John Pote, Philippe Le Coustumer
Summary: Developing countries face challenges in municipal wastewater management, as untreated wastewater and sludge from septic tanks are often discharged into rivers without treatment. This study developed a wastewater treatment plant prototype that incorporates Moringa oleifera seeds treatment, which effectively reduces faecal indicator bacteria and antibiotic-resistant bacteria in domestic wastewater.
Article
Materials Science, Biomaterials
Omar El Hamoui, Tarek Sayde, Isabelle Svahn, Antoine Gudin, Etienne Gontier, Philippe Le Coustumer, Julien Verget, Philippe Barthelemy, Karen Gaudin, Serge Battu, Gaetane Lespes, Bruno Alies
Summary: This study demonstrates the feasibility of using nucleoside-derived low-molecular-weight gelators (LMWGs) as a scaffold for 3D cell culture. The cell viability, proliferation, and spatial organization of glioblastoma cells cultured on the LMWG scaffold were successfully achieved, indicating the potential applications of this method. One of the hydrogel systems tested showed excellent support for cell proliferation and spheroidal organization throughout the culture time. These LMWG-based systems offer advantages such as minimal material consumption, optimal viscoelasticity for cell culture, and thermoreversibility. The ability to grow spheroids from patient cells using this scaffold holds promise for personalized therapies by reducing lattice variability.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Environmental Sciences
Lina Ramirez Arenas, Philippe Le Coustumer, Stephan Ramseier Gentile, Stephane Zimmermann, Serge Stoll
Summary: The presence of nanoparticles in drinking water raises concerns about their potential risks to human health and the efficacy of water treatment plants in removing them. This study examines the efficiency of granular activated carbon (GAC) in removing CeO2 nanoparticles. The results show that GAC has a good affinity for nanoparticles, with higher adsorption capacity and removal efficiency in lake water compared to ultrapure water. The adsorption mechanism is mainly controlled by electrostatic attractions, and mass transfer processes play a role in the removal of nanoparticles in lake water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Denis E. Tranca, Arcadie Sobetkii, Radu Hristu, Stefan R. Anton, Eugeniu Vasile, Stefan G. Stanciu, Cosmin K. Banica, Efstathios Fiorentis, David Constantinescu, George A. Stanciu
Summary: This study investigates the characteristics of ultrathin chromium nitride films with thickness below 400 nm deposited on silicon substrates using direct current and high-power impulse magnetron sputtering techniques. The films were analyzed by scanning electron microscopy, atomic force microscopy, and nanoindentation. The results show that ultrathin CrN films with excellent mechanical properties can be obtained using magnetron techniques, with Young's modulus values ranging from 140 GPa to 250 GPa for high-power impulse magnetron sputtering samples and from 240 GPa to 370 GPa for direct current sputtering samples. Stiffness measurements also indicate the good mechanical properties of the investigated samples, with stiffness values ranging from 125 N/m to 132 N/m for high-power impulse magnetron sputtering samples and from 110 N/m to 119 N/m for direct current sputtering samples.
Article
Chemistry, Physical
Denis E. Tranca, Stefan G. Stanciu, Radu Hristu, Adrian M. Ionescu, George A. Stanciu
Summary: We present a viable method to modify the refractive index of PMMA by focusing a femtosecond pulsed near-infrared laser beam on the apex of a metalized nanosized tip. The refractive index can be changed over a circular area with a diameter <200 nm under 790 nm illumination, representing a four-fold increase in resolution compared to the current state-of-the-art methods. This method can have important applications in the fabrication of photonic crystal lattices and surface waveguides.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Stefan R. Anton, Rosa M. Martinez-Ojeda, Radu Hristu, George A. Stanciu, Antonela Toma, Cosmin K. Banica, Enrique J. Fernandez, Mikko J. Huttunen, Juan M. Bueno, Stefan G. Stanciu
Summary: Second Harmonic Generation Microscopy (SHG) is a valuable tool for non-invasively identifying and monitoring changes in collagen structures of tissues. However, the interpretation of SHG data can be challenging, hindering its clinical translation. This study explores the use of Deep Learning models to automatically detect corneal edema in SHG images with promising results, potentially paving the way for precision diagnostics of the cornea with Deep-Learning assisted SHG imaging.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Environmental Sciences
Angel Negrete Velasco, Stephan Ramseier Gentile, Stephane Zimmermann, Philippe Le Coustumer, Serge Stoll
Summary: This study evaluates the efficiency of a main drinking water treatment plant in Geneva, Switzerland, in removing microplastics and synthetic fibers. The results show that 70% of microplastics are retained during sand filtration and the total removal rate is 97% after activated carbon filtration.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Mathias Diedhiou, Seyni Ndoye, Helene Celle, Serigne Faye, Stefan Wohnlich, Philippe Le Coustumer
Summary: This study investigates the quality of groundwater in West central Senegal and assesses its suitability for drinking and irrigation purposes. Results show that the groundwater has neutral to slightly alkaline pH values and most samples are suitable for drinking and irrigation. However, some samples exceed the fluoride guideline for drinking water.
Review
Chemistry, Multidisciplinary
Mihaela Asaftei, Massimiliano Lucidi, Cristina Cirtoaje, Alina-Maria Holban, Costas A. A. Charitidis, Fang Yang, Aiguo Wu, George A. A. Stanciu, Ozge Saglam, Veronica Lazar, Paolo Visca, Stefan G. G. Stanciu
Summary: The fast and global spread of bacterial resistance to antibiotics has led to an urgent need for alternative antibacterial agents. Recent studies have shown that nanomaterials, particularly carbon nanotubes (CNTs), have the potential to be used as antimicrobial agents. This mini-review surveys recent progress on the antibacterial effects of CNTs and examines the proposed mechanisms of action, with a focus on their activity against Staphylococcus aureus and Escherichia coli.
Article
Water Resources
Seyni Ndoye, Mathias Diedhiou, Helene Celle, Serigne Faye, Mohammed Baalousha, Philippe Le Coustumer
Summary: Seawater intrusion is a serious problem in coastal aquifers in Senegal, leading to deterioration in water quality. The study aims to identify the zones of degraded water quality by analyzing the chemical composition of groundwater and geochemical processes. The results show that the groundwater is highly heterogeneous, with varying pH, total dissolved solids, and electrical conductivity values. Water-rock interaction and evaporation processes regulate the chemistry of the groundwater.
FRONTIERS IN WATER
(2023)
Article
Materials Science, Multidisciplinary
Stefan R. Anton, Denis E. Tranca, Stefan G. Stanciu, Radu Hristu, Cosmin K. Banica, Eugeniu Vasile, Zhaoyi Hu, Engang Fu, George A. Stanciu
Summary: This study explores the mechanical and optical properties of nanoporous copper (NPC) films treated with acid and base. The results show distinct nanoporous structures in both NPC 1 and NPC 2, with differences in rugosity, connectivity, topological characteristics, and optical properties.
Meeting Abstract
Radiology, Nuclear Medicine & Medical Imaging
Serge Battu, Tarek Sayde, Omar El Hamoui, Gaetane Lespes, Philippe Barthelemy, Philippe Le Coustumer, Bruno Alies, Arnaud Pothier, Fabrice Lalloue, Gaelle Begaud
NUCLEAR MEDICINE AND BIOLOGY
(2022)
