Article
Optics
Mohammad M. Afandi, Gian Antariksa, Hyeonwoo Kang, Taewook Kang, Jongsu Kim
Summary: In this study, a tunable blue-green Y2SiO5:Tb3+ powder-based electroluminescent (PEL) device was prepared through a facile screen-printing method. The device exhibits high EL intensity and unique optical properties, making it suitable for sterilization applications.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
R. B. Basavaraj, Santosh Kumar, D. P. Aarti, G. Nagaraju, H. M. Suresh Kumar, R. Soundar, T. S. Shashidhara, H. N. Sumedha, M. Shahsank
Summary: In this study, orange-red light emitting BaZrO3 (BZO) nanopowders doped with Sm3+ ions were successfully prepared using Aloe vera gel as a surfactant. The structural and optical properties of BZO:Sm3+ were characterized using various techniques, demonstrating its potential for photovoltaic applications as a high thermal stability orange-red light producing element.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Ram Sagar Yadav
Summary: In this study, Tb3+/Sm3+ doped Y2O3 nano-phosphors were prepared by the solution combustion method. The structural and morphological analyses confirmed the nanocrystalline structure of the Y2O3 nano-phosphors. The doping of Sm3+ ions resulted in tunable color emission and improved energy transfer efficiency. The research findings suggest potential applications in display devices, color tunable devices, and warm white LEDs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
O. Soriano-Romero, E. F. Huerta, A. N. Meza-Rocha, U. Caldino
Summary: This study presents a spectroscopic analysis of potassium-zinc phosphate glasses doped with Sm3+ and co-doped with Tb3+/Sm3+. The glasses showed high transparency in the visible region and have potential as luminescent materials. The Sm3+ doped glass exhibited orange emission with high color purity and correlated color temperature. The Tb3+/Sm3+ co-doped glass displayed emissions with different tones and high color purity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Wanli Li, Zhaoyang Chen, Pengjun Zhao, Yanwei Fan
Summary: Color-tunable phosphors were achieved by co-doping Tb3+ and Sm3+ in BaZn2(PO4)(2) glass-ceramic, with the luminescent color changing from green to yellow as the Sm3+ concentration increased. Energy transfer from Tb3+ to Sm3+ was confirmed, with the mechanism being dipole-dipole interaction, and a high thermal stability with potential applications in UV-converted LEDs was demonstrated.
Article
Optics
Zhen Sun, Anqi Zhang, Zuoling Fu, Liang Ma
Summary: Color-tunable luminescence intensity ratio thermometers and information encryption are designed using different energy transfer mechanisms. Two types of thermometric materials, SrNb2O6: Tb3+, Pr3+ and SrNb2O6: Tb3+, Sm3+, are prepared. The temperature sensing properties of (5D4→7F5)Tb3+/(1D2→3H4)Pr3+ and (5D4→7F5)Tb3+/(4G5/2→6H7/2)Sm3+ are different due to distinct energy transfer processes, providing visualization of temperature measurement. Additionally, multi-mode color emission of Tb3+ or Pr3+ doped SrNb2O6 enables information hiding.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yi-Hua Hung, I. -Chun Ling, Tsung-Hsien Hsu, Cheng-Liang Huang
Summary: A tunable white light phosphor was synthesized and its luminescence properties were investigated. The results showed that the phosphor exhibited strong thermal stability and the emission color could be modulated by varying the co-doping concentration.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Seungyong Shin, Sangmoon Park
Summary: In this study, Ba6Ca3Al2Si6O24:Ce3+/Tb3+/Na+ phosphors were synthesized, and it was found that co-doping Na+ and Ce3+ into the crystal structure can enhance green emission, along with determining the energy transfer mechanism from Ce3+ to Tb3+. Additionally, the CIE coordinates from blue to green regions were monitored, thermal quenching was observed with increasing temperature, and the activation energy of the Tb3+ transition was calculated. The estimated relative quantum efficiency and internal quantum efficiency were obtained for the Ba5.4Ce0.1Tb0.2Na0.3Ca3Al2Si6O24 phosphors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
C. Lakshmi Ranganatha, B. S. Palakshamurthy, G. P. Abhilash, Anu Mathew, H. M. Suresh Kumar, C. Shivakumara
Summary: Efficient green light-emitting SrMoO4:Tb3+ phosphors were prepared and showed a decrease in band gap energy with increasing Tb3+ content. The PL emission spectra revealed characteristic emission peaks of Tb3+ ions, and the calculated lifetime indicated potential for solid-state lighting applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Jun Kyu Lee, Yongbin Hua, Jae Su Yu
Summary: Reddish-orange emitting CaLa4Ti4O15:Sm3+ phosphors were synthesized via a simple solid-state reaction. The phosphors exhibited dominant excitation at 408 nm and emission at 601 nm, driven by dipole-dipole interaction. The optimal Sm3+ ion concentration for luminescent properties was found to be 5 mol%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Crystallography
Julija Grigorjevaite, Arturas Katelnikovas
Summary: Scientists are studying new inorganic luminescent materials that can be excited with near-infrared radiation. These materials have various applications such as luminescent thermometers, bio-imaging agents, and anti-counterfeiting pigments. The authors report the synthesis and investigation of two series of K2Gd(PO4)(WO4):20%Tb3+ with different doping concentrations of Eu3+ and Yb3+. The optical properties of these materials, including reflection, excitation and emission spectra, fluorescence lifetime, and quantum efficiency, were studied using steady-state and kinetic spectroscopy.
Article
Chemistry, Multidisciplinary
Wen-Te Wu, Kwong-Kau Tiong, Yu-Wei Lee, Sheng-Yao Hu, Yueh-Chien Lee, Wei Huang
Summary: In this study, a series of Sm3+/Tb3+ co-doped CaMoO4 phosphors were synthesized by an efficient method of microwave-assisted heating. The research focused on the characterization and performance analysis of the synthesized phosphors. The results showed that the light-emitting region of the phosphors can be controlled by adjusting the molar ratio of Sm3+/Tb3+ ions, making them a promising material for color-tunable phosphors in white-LEDs.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Yongmin Duan, Panpan Li, Yang Lu, Ying Tian, Muzhi Cai, Feifei Huang, Shiqing Xu, Junjie Zhang
Summary: In this work, a novel Tb3+ doped Cs4PbBr6 PQDs tellurite glass was fabricated, providing blue-green tunable luminescence with the green emission originating from Br vacancies. This work highlights the potential of Tb3+ doped Cs4PbBr6 glass for luminescence applications and further exploration of new PQDs glass materials.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Rui Sun, Xiang Wei, Huijuan Yu, Pengyun Chen, Haiyong Ni, Junhao Li, Jianbang Zhou, Qiuhong Zhang
Summary: A novel temperature-sensitive material, Sr3Y2Ge3O12:Bi3+,Sm3+ phosphor, was synthesized successfully by a solid-state reaction method. Under 376 nm light excitation, the prepared phosphor exhibits blue emissions from Bi3+ and orange red emissions from Sm3+ due to energy transfer. The temperature sensing performance of the phosphor was evaluated by measuring the fluorescence intensity ratio (FIR) of Sm(3+)versus Bi3+. Moreover, it was found that the sensitivities of Sr3Y2Ge3O12:Bi3+,Sm3+ could be tuned by changing the concentration of activators to determine the optimal temperature measurement conditions.
DALTON TRANSACTIONS
(2023)
Article
Optics
E. F. Huerta, E. Gonzalez-Suarez, A. N. Meza-Rocha, S. Bordignon, A. Speghini, U. Caldino
Summary: The spectroscopic evaluation of Sm3+/Tb3+/Eu3+ doped LAZSTE glass provides insights into its potential application in W-LED technology. Nonradiative energy transfer processes were observed from Tb3+ to Sm3+ and/or Eu3+, as well as from Sm3+ to Eu3+. Analysis suggests that these energy transfer processes are predominantly mediated through an electric dipole-dipole interaction.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Daiane Fernandes, Mateus M. Ferrer, Cristiane W. Raubach, Mario L. Moreira, Pedro L. G. Jardim, Eduardo Ceretta Moreira, Carlos F. O. Graeff, Sergio S. Cava
Summary: NaNbO3 nanoparticles were synthesized using microwave-assisted hydrothermal method and heat treatment. The crystallinity and particle shape of the nanoparticles were modulated by heat treatment. The obtained nanoparticles showed excellent photocatalytic activity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Jose A. S. Laranjeira, Sergio A. Azevedo, Guilherme S. L. Fabris, Anderson R. Albuquerque, Mateus M. Ferrer, Julio R. Sambrano
Summary: This study investigates the surface-dependent properties and morphological transformation routes of rutile germanium dioxide using density functional theory and the Wulff construction procedure. The results show that different coordination breakages on the outermost polyhedra are related to various factors such as atomic charges, band gap, stability, and Fermi energy. Additionally, cubic, octahedral, or hexadecahedral morphologies of rutile germanium dioxide have potential photocatalytic activity for hydrogen production.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Debora. F. Dos Santos, Anderson A. G. Santiago, Marcio D. Teodoro, Fabiana V. Motta, Mauricio R. D. Bomio
Summary: In this study, nanomaterials of the SrMoO4/g-C3N4 heterostructure were synthesized by the sonochemical method. The results showed the formation of heterojunctions, broadening of the wavelength absorption range, and a decrease in photoluminescence intensity. Photocatalytic tests demonstrated the high degradation efficiency of the nanomaterials towards organic contaminants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Catia Liane Ucker, Vitor Goetzke, Fabio Calcagno Riemke, Marcely Echeverria Oliveira, Neftali Lenin Villarreal Carreno, Fernando Dal Pont Morisso, Marcio Daldin Teodoro, Valmor R. Mastelaro, Mario Lucio Moreira, Cristiane Wienke Raubach, Sergio da Silva Cava
Summary: In this study, Nb2O5 inserted with Fe was synthesized using the microwave-assisted hydrothermal method. The insertion of Fe promoted the formation of pores and decreased the band gap of Nb2O5. The 1%Fe-Nb2O5 sample showed the best photocatalytic discoloration result. The increase in ion concentration led to a decrease in photocatalytic performance. The factorial design experiment revealed the significant effects of catalyst type, catalyst dosage, pH, and reaction time on the degradation of RhB.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Catia L. Ucker, Suelen R. Almeida, Renato G. Cantoneiro, Lisiane O. Diehl, Sergio Cava, Mario L. Moreira, Elson Longo, Cristiane W. Raubach
Summary: In this study, a calcium titanate-zinc sulfide heterostructure was successfully assembled using a microwave-assisted solvothermal method. The heterostructure showed enhanced photocatalytic activity for the degradation of organic dyes, making it a promising candidate for water decontamination.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Electrochemistry
Cristian Hessel, Nickson Perini, Elton Sitta
Summary: In this study, the dependence of CdS photocorrosion and the oxidation reaction of small organic molecules on CdS/FTO photoanodes under visible light irradiation was investigated. Glycerol showed higher photocurrents compared to methanol and ethylene glycol in both linear potential voltammetry and chronopotentiostatic experiments. Cross-sectional SEM images revealed distinct photocorrosion patterns depending on the organic molecule employed.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Brunna Mota Ferrairo, Victor Mosquim, Lucas Jose de Azevedo-Silva, Luara Aline Pires, David Santos Souza Padovini, Aroldo Geraldo Magdalena, Carlos Alberto Fortulan, Paulo Noronha Lisboa-Filho, Jose Henrique Rubo, Ana Flavia Sanches Borges
Summary: This study evaluated the effectiveness of sonochemical and milling nanoparticulate techniques on bovine-origin hydroxyapatite (HA). The results showed that both methods were able to decrease the particle size and maintain the crystal structure of HA. The milling method produced smaller particles compared to sonochemical treatment.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Amanda F. Gouveia, Celso M. Aldao, Miguel A. Ponce, Edson R. Leite, Elson Longo, Juan Andres
Summary: This study focuses on the structural, energetic, and electronic properties of low and high index surfaces of SnO2 semiconductor by using first-principles calculations. The findings provide a close match between experimental field emission scanning electron microscopy images and computational simulation, elucidating the atomic arrangements and stability of the exposed surfaces. These results can potentially guide the synthesis techniques for controlling morphology evolution through temperature/pressure control or selective adsorption of solvents/surfactants based on surface interactions.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Applied
Cibele Carneiro Pessan, Juliana Silva Bernardes, Silvia H. P. Bettini, Edson R. Leite
Summary: Understanding the relationship between cellulose fiber morphology and the rheological behavior of its dispersions is important for optimizing their applications. Sugarcane bagasse-sourced cellulose dispersions with different numbers of high-pressure homogenization cycles were produced. Microfluidization produced cellulose nanofibers with similar surface charge densities and crystallinities. The rheological properties of the dispersions could be tuned by adjusting the length of the nanofibers, allowing for targeted applications.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Anderson J. Schwanke, Wesley Monteiro, Leticia G. da Trindade, Elson Longo, Katia Bernardo-Gusmao, Michele O. de Souza
Summary: Microporous and mesoporous nanocomposites based on silica and titanate were synthesized by unrolling sodic titanate nanotubes and introducing surfactant species and silica species between the unrolled titanate nanotubes. The resulting nanoarchitectures exhibit higher specific surface areas and improved adsorption capacities compared to the pristine titanate nanotubes. Kinetic and isotherm analyses indicate that the adsorption process follows pseudo-second-order kinetics and occurs through multilayer adsorption onto the nanocomposites, rather than onto uniform sites.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Lucas S. Ribeiro, Renata L. Sala, Thaiane A. Robeldo, Ricardo C. Borra, Emerson R. Camargo
Summary: Conventional systemic drug delivery methods are less effective compared to localized delivery systems. This study developed thermoresponsive nanocomposites based on poly(N-vinylcaprolactam) and silica particles for efficient and controlled release of hydrophobic and hydrophilic drugs. The nanocomposites exhibited improved rheological properties and prevented diffusion away from the injection site. The synthesized materials achieved controlled drug release for 7 days and showed promising inhibitory effects on carcinoma cells while being non-toxic to healthy cells.
Article
Materials Science, Multidisciplinary
Vinicius Richieri Manso Goncalves, Diego Rafael Nespeque Correa, Carlos Roberto Grandini, Carlos Alberto Fonzar Pintao, Conrado Ramos Moreira Afonso, Paulo Noronha Lisboa Filho
Summary: This study aims to improve the tribological behavior of Ti-Nb alloys by adding hard reinforcement. The addition of NbC powder during the fabrication process resulted in in-situ reactions and the precipitation of TiC as the reinforcing phase. The composites produced showed improved tribocorrosion behaviors compared to the unreinforced samples.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
A. Z. Simoes, P. P. Ortega, M. A. Ramirez, H. Moreno, C. M. Aldao, M. A. Ponce, F. Moura
Summary: This study focuses on the synthesis of LTO thin films via the polymeric precursor method and their deposition onto STO substrates using spin coating. The results demonstrate the coexistence of ferromagnetic and ferroelectric responses in the LTO/STO heterojunctions at room temperature. Magnetoelectric coupling is observed under a DC bias magnetic field, and the dielectric constant is affected by the coupling between magnetic and electric dipoles as well as oxygen octahedra distortion. The film-substrate mismatch significantly influences the system's dielectric properties. Overall, this study provides insights into inducing ferromagnetic/ferroelectric phases and understanding oxygen vacancy dynamics for various electronic devices.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Engineering, Biomedical
Juliani Caroline Ribeiro de Araujo, Leonardo Alvares Sobral Silva, Vinicius Almeida de Barros Lima, Tiago Moreira Bastos Campos, Paulo Noronha Lisboa Filho, Roberta Okamoto, Luana Marotta Reis de Vasconcellos
Summary: With increasing life expectancy, the prevalence of osteoporosis has risen, leading to a search for strategies to regenerate bone tissue. The sonochemical technique was used to functionalize bioglass, resulting in modified surface characteristics. In vitro tests showed favorable cell adhesion and differentiation, with no cytotoxicity observed. Animals treated with teriparatide demonstrated new bone formation, indicating positive effects on bone tissue. Further studies are required to investigate the long-term effects of the interaction between bioglass and teriparatide.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Materials Science, Ceramics
S. A. N. Franca Junior, W. Acchar, S. L. A. Dantas, P. H. Chiberio, H. P. A. Alves, M. R. D. Bomio, F. V. Motta, F. Bohn, A. Ferreira, F. Vaz, M. A. Correa
Summary: We conducted a comprehensive investigation on the high-frequency dielectric properties of (ZrO2)100-x(BaTiO3)x heterostructures. By adjusting the content of BaTiO3, we could modify the dielectric constant of the resulting ceramic sheets. Our results demonstrated successful fabrication of heterostructured ceramic sheets and the ability to tailor the electric, structural, and dielectric properties of both ZrO2 and BaTiO3 materials. Furthermore, the evolution of the dielectric constant could be manipulated according to specific technological applications.
CERAMICS INTERNATIONAL
(2023)
