Article
Engineering, Multidisciplinary
Ugur Caligulu, Nida Darcan, Haluk Kejanli
Summary: This study investigated the impact of Calcium (Ca) and Manganese (Mn) dopants on the optical and surface properties of Titanium dioxide (TiO2) nanomaterial. The results showed that the doping ratio of Mn affected the morphological properties of TiO2 and increased the optical band gap of the samples. The produced samples have potential applications in transparent conductive electrode applications, optoelectronic devices, and sensor production.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2021)
Article
Chemistry, Physical
Umberto Belle, Daniela Spini, Barbara Del Curto, MariaPia Pedeferri, Maria Vittoria Diamanti
Summary: The environmental impact of industrial technologies and related remediation methods is a significant research area. In the development of materials for wastewater treatment or air purification, the use of hazardous reactants often diminishes the overall positive contribution to the environment. This study presents the synthesis of stable titanium dioxide (TiO2) sols using an environmentally friendly method. The sol was deposited on glass and evaluated for wastewater purification ability by photocatalytic degradation of organic dyes. The results showed high efficiency and reusability, with degradation rates exceeding 85% for Rhodamine B and 100% for Methylene Blue.
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)
Article
Physics, Multidisciplinary
Ahmed Ziti, Bouchaib Hartiti, Salma Smairi, Hicham Labrim, Youssef Nouri, Amine Belafhaili, Herve Joel Tchognia Nkuissi, Salah Fadili, Mounia Tahri, Philippe Thevenin
Summary: In this research, copper-cobalt-tin-sulphur (CCoTS) absorbers were synthesized using the sol-gel process and dip-coating deposition technique. The impact of annealing temperature on the structural, compositional, morphological, optical and electrical characteristics of CCoTS layers was studied. The results showed that the CCoTS absorbers had a polycrystalline structure with small grain size and high purity. The density and uniformity of the films improved with increasing annealing temperature. The band gap and sheet resistance of the films also exhibited interesting changes.
Article
Materials Science, Ceramics
Koji Abe, Tasuku Kubota
Summary: Al-doped ZnO (AZO) films were prepared by sol-gel method using precursor solutions containing oxygen sources. Zinc vacancy acceptors were formed under oxygen-rich growth conditions. Glass substrates with a zinc layer were used to supply zinc to the AZO films during calcination annealing. The AZO films showed wurtzite ZnO crystal structure and high transparency. The electrical properties of the films were improved by using substrates with a zinc layer, achieving a low resistivity of 9.4 x 10(-4) Ocm.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
M. Chakraborty, E. S. Kadir, R. N. Gayen
Summary: By varying the graphene oxide (GO) content, the modification of UV photo-response characteristics in transparent titanium dioxide-graphene oxide (TiO2-GO) nanocomposite thin films was studied. The presence of GO improves the optical band gap of TiO2 without affecting its transparency. The fabricated metal-semiconductor (MS) Schottky junctions with TiO2-GO nanocomposite thin films show rectifying behavior and improved UV response characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
M. Narasimha Murthy, V. Ganesh, G. Ravinder, S. Anusha, G. Chandrakala, C. J. Sreelatha
Summary: Aluminum and rubidium-doped zinc oxide thin films were deposited on glass substrates using sol-gel dip coating method. The effect of dopant content on structural, surface morphological, vibrational, and optical properties was studied using X-ray diffraction, SEM-AFM, and Raman spectrometer. It was observed that introducing Rb impurities into the ZnO lattice resulted in a deterioration in crystal quality and a blue shift in the bandgap. The increase in dopant concentration led to a change from hydrophilic to hydrophobic nature and showed significant antibacterial activity against E. coli.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Hamed Beigli, Mahdi Shaddoust, Mohammad Hadi Ahmadi, Abbas Bagheri Khatibani
Summary: In this study, undoped zinc oxide and cobalt-doped thin films were prepared using a sol-gel dip-coating technique, and the effects of gamma irradiation on the structural, morphological, and optical properties of the samples were investigated. The results showed significant changes in various physical properties, especially in optical and sensing characteristics, under low and relatively long-term gamma irradiation.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Lu He, Dietrich R. T. Zahn, Teresa I. I. Madeira
Summary: Titanium dioxide (TiO2) thin films have photocatalytic properties and can be used for recycling and maintenance. Factors affecting their performance include nanocrystalline size, surface morphology, and phase composition, which need to be better studied and correlated.
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
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
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Materials Science, Paper & Wood
Chenglin Zheng, Yaping Sun, Yuewei Cui, Wenjie Yang, Zan Lu, Shengtao Shen, Yanzhi Xia, Zhong Xiong
Summary: Alginate fibers possess excellent intrinsic flame retardancy, biocompatibility, and hydrophilicity, but water absorption can cause deformation. Superhydrophobic alginate fabrics prepared by dip-coating in hexadecyltrimethoxysilane show excellent water repellence and salt resistance, enhancing flame retardancy.
Article
Materials Science, Coatings & Films
Sayyed Ahad Sajjadi, Naghi Parvini Ahmadi, Sasan Yazdani
Summary: The research examined the effect of low-temperature calcination on sol-gel derived amorphous alumina coatings, with coatings calcined at 300 degrees C exhibiting significantly improved corrosion resistance compared to those calcined at 500 degrees C.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Vasilica Mihaela Mindroiu, Andrei Bogdan Stoian, Roberta Irodia, Roxana Trusca, Eugeniu Vasile
Summary: In this study, TiO2 thin films were prepared on an FTO substrate by dip-coating and characterized for surface, optical, and electrochemical properties. The addition of dispersant (PEG) influenced the surface morphology, wettability, surface energy, band gap, and Urbach energy of the films. The dispersion addition also improved the catalytic properties, resulting in a higher insertion/extraction rate, lower charge-transfer resistance, and lower flat band potential. These TiO2 films show promise for various technological applications due to their advantageous surface, optical, and electrochemical features.
Article
Chemistry, Physical
Alexandre de O. Jorgetto, Adrielli C. P. da Silva, Marcos H. P. Wondracek, Rafael I. V. Silva, Edivaldo D. Valini, Margarida J. Saeki, Valber A. Pedrosa, Gustavo R. Castro
APPLIED SURFACE SCIENCE
(2015)
Article
Chemistry, Applied
Maria Rosecler Miranda Rossetto, Fabio Vianello, Margarida Juri Saeki, Giuseppina Pace Pereira Lima
Article
Materials Science, Biomaterials
Murillo L. Martins, Marcos F. Calabresi, Caio Quini, Juliana F. Matos, Jose R. A. Miranda, Margarida J. Saeki, Heloisa N. Bordallo
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2015)
Article
Chemistry, Physical
Marcos Henrique P. Wondracek, Alexandre Oliveira Jorgetto, Adrielli Cristina P. Silva, Janaine do Rocio Ivassechen, Jose Fabian Schneider, Margarida Juri Saeki, Valber Albuquerque Pedrosa, Walter Kenji Yoshito, Fabiano Colauto, Wilson A. Ortiz, Gustavo Rocha Castro
APPLIED SURFACE SCIENCE
(2016)
Article
Multidisciplinary Sciences
Murillo L. Martins, Rosanna Ignazzi, Juergen Eckert, Benjamin Watts, Ramon Kaneno, Willian F. Zambuzzi, Luke Daemen, Margarida J. Saeki, Heloisa N. Bordallo
SCIENTIFIC REPORTS
(2016)
Article
Materials Science, Multidisciplinary
William de Melo Silva, Camila Amorim Ribeiro, Cleiton Silva Marques, Americo Sheitiro Tabata, Margarida Juri Saeki, Leonardo Iusuti Medeiros, Deilson Elgui de Oliveira
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2017)
Article
Chemistry, Physical
Alexandre de Oliveira Jorgetto, Alexander Milbrat, Jose Fabian Schneider, Zheng Li, Guido Giammaria, Margarida Juri Saeki, Thiago Marcelo Ribeiro Gianeti, Giuseppina Pace Pereira Lima, Valber de Albuquerque Pedrosa, Guido Mul, Gustavo Rocha de Castro
APPLIED SURFACE SCIENCE
(2018)
Article
Chemistry, Multidisciplinary
Rodrigo U. Ichikawa, Joao P. R. L. L. Parra, Murillo L. Martins, Walter K. Yoshito, Margarida J. Saeki, Xavier Turrillas, Luis G. Martinez
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2018)
Article
Chemistry, Multidisciplinary
Janaine do Rocio Ivassechen, Alexandre de Oliveira Jorgetto, Marcos Henrique Pereira Wondracek, Adrielli Cristina Peres da Silva, Luiz Fabricio Zara, Valber de Albuquerque Pedrosa, Bruno Prior Rocha, Margarida Juri Saeki, Gustavo Rocha Castro
TURKISH JOURNAL OF CHEMISTRY
(2018)
Article
Engineering, Biomedical
Mariana Correa Rossi, Daniel Leal Bayerlein, Jaqueline de Souza Brandao, Joao Pedro Hubbe Pfeifer, Gustavo dos Santos Rosa, William de Melo Silva, Luis Gallego Martinez, Margarida Juri Saeki, Ana Liz Garcia Alves
Summary: The study demonstrates that titanium scaffolds with stabilizing elements Nb and Sn exhibit higher wettability and better cellular migration performance when magnesium is added as spacer. Furthermore, the conditioned medium with TNS/M shows enhanced osteogenic differentiation potential for bone marrow-derived stem cells. These findings suggest that the powder metallurgy processed scaffold materials have promising potential for biomedical applications.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Environmental Sciences
Adrielli C. P. Silva, Alexandre O. Jorgetto, Marcos H. P. Wondracek, Margarida J. Saeki, Valber A. Pedrosa, Yormary N. Colmenares, Valmor R. Mastelaro, Felipe K. Sutili, Marco A. U. Martines, Paula C. Pasta, Gustavo R. Castro
Summary: The modification of PVC surface with 4-amino-5-hydrazino-1,2,4-triazole-3-thiol molecule was investigated, revealing that S-H groups are responsible for molecule attachment and nitrogen atoms are directly involved in metal ion coordination. Chemisorption was identified as the main mechanism for metal removal, and adsorption isotherms of Cd(II), Cu(II) and Pb(II) followed the Langmuir model.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Mariana Correa Rossi, Eber de Santi Gouvea, Montserrat Vicenta Haro Rodriguez, Margarida Juri Saeki, Angel Vicente Escuder, Vicente Amigo Borras
Summary: Electrical resistance sintering is a rapid method for fabricating metallic samples, being used here to produce the Ti-Nb-Sn alloy for potential biomedical applications. The study revealed an increase in beta phase content, decrease in microhardness, and grain size with rising electric current density, while corrosion tests showed excellent resistance to corrosion. Standard deviations of samples at certain electric current densities were higher due to lack of microstructure homogeneity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Alberto Goncalves Vieira de Carvalho Neto, Dayse Iara dos Santos, Sandra Regina Rissato, Margarida Juri Saeki, Silvia Luciana Favaro, Eduardo Radovanovic, Diogo Silva Pellosi
MATERIA-RIO DE JANEIRO
(2020)
Article
Physics, Multidisciplinary
Rodrigo U. Ichikawa, Joao P. R. L. L. Parra, Oriol Vallcorba, Inma Peral, Walter K. Yoshito, Margarida J. Saeki, Xavier Turrillas, Luis G. Martinez
Article
Environmental Sciences
Milene S. Pereira, Amanda E. Martins, Alexandre O. Jorgetto, Felipe A. Santos, Rafael I. V. Silva, Margarida J. Saeki, Marco A. U. Martines, Sonia M. A. Jorge, Gustavo R. Castro
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL
(2018)