Article
Materials Science, Ceramics
G. Kilic, E. Ilik, Shams A. M. Issa, Bashar Issa, U. G. Issever, Hesham M. H. Zakaly, H. O. Tekin
Summary: This study evaluated the structural, optical, and physical characteristics of glasses with different levels of In2O3 content, finding that increasing In2O3 content led to higher glass density, increased Urbach energies, and alterations in optical and absorption characteristics. Additionally, substituting ZnO with In2O3 significantly enlarged the optical band gap, and the gamma-ray mass attenuation coefficient showed consistent growth with higher In2O3 content. High concentrations of In2O3 in TeO2-ZnO glass were found to be beneficial for integrating structural, optical, and radiation properties.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
C. Aparna, Pramoda Kumara Shetty, M. G. Mahesha, N. Karunakara, I. Yashodhara
Summary: Measurement of radiation dose is of utmost importance in the field of medicine and research. This study aims to determine the sensitivity of Indium oxide thin film for dosimetry applications and investigates the effects of gamma radiation on the structural, optical, and electrical properties of the film.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
T. M. Aper, F. K. Yam, K. P. Beh
Summary: This study reports the synthesis of various morphologies of indium oxide nanostructures on silicon and nickel-coated silicon substrates via carbothermal reduction, and investigates the influence of deposition temperature on the properties of the films. The results show that material growth and crystallinity are enhanced with increased deposition temperature, leading to a decrease in optical band gap.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Ceramics
Shipra Choudhary, Manisha Sharma, Venkata Krishnan, Satyabrata Mohapatra
Summary: This study successfully prepared magnetically separable CoFe2O4-ZnO hybrid nanostructures and characterized their structure and morphology using various techniques. CoFe2O4-ZnO exhibited significantly enhanced photocatalytic performance compared to pristine CoFe2O4 due to its high light utilization ability and heterojunction formation that delayed charge carrier recombination. The study provides an efficient solution for sunlight-responsive magnetically separable CoFe2O4-ZnO photocatalyst in wastewater purification.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Renato Grigolon Capelo, Josef Maximilian Gerdes, Ulrich Rehfuss, Lais Dantas Silva, Michael Ryan Hansen, Leo van Wuellen, Hellmut Eckert, Danilo Manzani
Summary: This study reports the preparation, optical, and structural characterization of a new fluoride-phosphotellurite glass, which possesses high thermal stability and network connectivity, making it suitable for optoelectronics and photonic devices applications.
DALTON TRANSACTIONS
(2023)
Review
Nanoscience & Nanotechnology
Zhandong Li, Dmitry Kurouski
Summary: The review critically discusses recent progress in understanding hot carrier-driven chemistry and catalytic processes at the nanoscale. Experimental and theoretical findings are presented to demonstrate novel plasmon-driven reactivity for redox, coupling, elimination, and scissoring reactions. Additionally, the impact of these findings on plasmonic catalysis and TERS imaging is discussed in the review.
Article
Chemistry, Physical
Yan Wang, Jialiang Jiang, Zhichao Song, Jun Zhang
Summary: Lithium gallium oxide (LiGaO2 & LiGa5O8) nanoparticles were successfully synthesized using thermal evaporation method under different atmospheric conditions, with differing synthesis preferences for each type in air or argon. The nanoparticle-based photodetector exhibited significant changes in electrical and luminescence properties, and showed sensitivity to temperature fluctuations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
T. M. Aper, F. K. Yam, K. G. Saw, Khi Poay Beh, Khaled M. Chahrour
Summary: In this study, indium oxide nanostructured films were synthesized using hydrogen assisted atmospheric pressure chemical vapor deposition technique at different deposition temperatures. The films' surface morphology, crystallinity, and optical properties were characterized, and their photoelectrochemical (PEC) activity was investigated. The sample grown at 950 degrees C exhibited optimal PEC performance, with high photocurrent density, incident photon to current conversion efficiency, and applied bias to photon conversion efficiency. The superior PEC performance of the sample was attributed to the film composition, crystallinity, bandgap reduction, flat band potential, and charge carrier density.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
C. Aparna, Pramoda Kumara Shetty, M. G. Mahesha
Summary: Zinc-doped indium oxide thin film was deposited on a glass substrate using the spray pyrolysis method. The film exhibited a polycrystalline cubic structure, with a shift in preferred growth orientation on higher doping levels. Surface morphology had a significant influence on the film's physical properties and optical transmittance decreased with doping. The presence of defects and the influence of Zn doping on the electrical properties were also confirmed.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Review
Biochemistry & Molecular Biology
Mariya I. I. Ikim, Genrikh N. N. Gerasimov, Vladimir F. F. Gromov, Olusegun J. J. Ilegbusi, Leonid I. I. Trakhtenberg
Summary: The paper discusses the correlation between the structure and properties of nanostructured conductometric sensors utilizing binary mixtures of semiconductor oxides to detect reducing gases in the environment. The effectiveness of the sensors depends on the chemisorption of molecules on catalytically active particles and the subsequent transfer to electron-rich nanoparticles, where they react with the analyzed gas. Factors such as composite synthesis method, catalytic activity of metal oxides (CeO2, SnO2, ZnO), and conductivity type of metal oxides (Co3O4, ZrO2) are evaluated in relation to the sensor process. The impact of oxygen vacancies in the composites on performance characteristics is also considered, with particular focus on the synthesis procedure for sensitive layers based on CeO2-In2O3 and their structure, conductivity, and sensing properties.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Ning Rui, Xuelong Wang, Kaixi Deng, Jorge Moncada, Rina Rosales, Feng Zhang, Wenqian Xu, Iradwikanari Waluyo, Adrian Hunt, Eli Stavitski, Sanjaya D. Senanayake, Ping Liu, Jose A. Rodriguez
Summary: The use of an indium oxide (In2O3)-based catalyst in the hydrogenation of CO2 to methanol shows high selectivity and catalytic activity, significantly increasing the methanol yield. The dynamic nature of the RuO2/In2O3 catalyst structure under CO2 hydrogenation conditions leads to the formation of RuOx-In2O3-x interfacial sites, which promote selective methanol synthesis.
Article
Materials Science, Ceramics
Erkan Ilik, Gokhan Kilic, U. Gokhan Issever, Shams A. M. Issa, Hesham M. H. Zakaly, H. O. Tekin
Summary: This study aimed to characterize various glasses based on the 50TeO(2)-30B(2)O(3)-(20-x)Li2O-xCeO(2) system. By increasing the CeO2 reinforcement, the glass densities, optical properties, and radiation interaction characteristics were significantly affected, showing changes in optical band gap and gamma-ray linear attenuation coefficient. CeO2 substitution for Li2O inside the structure effectively enhanced the glass's optical band gap, suggesting its potential for controlling and manipulating the optical and radiation properties of the glasses.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Naveen Thakur, Anu, Kuldeep Kumar, Ashwani Kumar
Summary: A microwave-assisted synthesis method was used to fabricate pure and co-doped CuO nanoparticles with (Ag, Zn), which showed enhanced antibacterial activity compared to pure CuO, making them a potential alternative for pathogen detection and antimicrobial agents.
DALTON TRANSACTIONS
(2021)
Article
Nanoscience & Nanotechnology
Jack E. N. Swallow, Robert G. Palgrave, Philip A. E. Murgatroyd, Anna Regoutz, Michael Lorenz, Anna Hassa, Marius Grundmann, Holger von Wenckstern, Joel B. Varley, Tim D. Veal
Summary: The study investigates the electronic and optical properties of (InxGa1-x)(2)O-3 alloys with a lateral cation composition gradient and three crystallographic phases. It reveals the optical gaps and surface space-charge properties, as well as the electronic structure of different phases. The properties of the alloys, such as n-type dopability of In2O3 and the use of Ga2O3 as a solar-blind UV detector, are understood in comparison to other common-cation compound semiconductors based on simple chemical trends of band edge positions and volume deformation potential.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Stefano Boscarino, Valentina Iacono, Andrea Lo Mastro, Fiorella Tringali, Antonio Terrasi, Maria Grazia Grimaldi, Francesco Ruffino
Summary: In this study, Cu nanoparticles were prepared via solid-state dewetting and laser ablation methods, and were embedded in transparent conductive oxide films to create plasmonic conductive structures. The morphology and chemical composition of the nanoparticles were found to depend on the annealing temperature and liquid environment. By comparing different structures, the researchers evaluated their performance in photovoltaic applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Domenico Andreatta, Nasibu Samson Shonza, Eduardo Perini Muniz, Marcelo Silveira Bacelos, Cleocir Jose Dalmaschio, Paulo Sergio da Silva Porto
Summary: A continuous electrocoagulation reactor with novel features was used to separate emulsified crude oil in water. By investigating flow rate, electrical current, and distance between electrodes, it was found that oil removal efficiency increased with flow rate and reached 86% under specific conditions.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ana Laura G. Biancolli, Saja Bsoul-Haj, John C. Douglin, Andrey S. Barbosa, Rogerio R. de Sousa Jr, Orlando Rodrigues Jr, Alexandre J. C. Lanfredi, Dario R. Dekel, Elisabete I. Santiago
Summary: Anion-exchange membrane fuel cells (AEMFCs) are gaining attention in clean energy research for their high power output and cost reduction potential but face challenges in operational stability. The radiation-induced changes in polymer properties impact AEM mechanical performance and durability. Low absorbed doses and inert atmosphere during irradiation improve backbone stability and AEMFC durability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Julia D. Bronzato, Aryane Tofanello, Martha T. Oliveira, Jefferson Bettini, Adrianne M. M. Brito, Silgia A. Costa, Sirlene M. Costa, Alexandre J. C. Lanfredi, Otaciro R. Nascimento, Iseli L. Nantes-Cardoso
Summary: Co3O4 quantum dots prepared with tomato seed extract show promising antiviral properties when applied as an additive in cotton fabric. The chiral characteristics of the QDs suggest potential applications as efficient photocatalysts and semiconductor materials.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Estacio P. de Araujo, Cleber A. Amorim, Adryelle N. Arantes, Adenilson J. Chiquito
Summary: In this study, a SnO2 nanowire network was used as an active layer in a metal-semiconductor-metal (MSM) structured acetone gas sensor. The sensor showed good crystallographic characteristics and desired nanowire morphology, and exhibited efficient response to acetone gas within a certain concentration range at room temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
T. R. Cunha, D. V. Sampaio, R. B. Pena, B. J. A. Moulton, R. F. Lancelotti, F. G. Alabarse, A. D. Rodrigues, P. S. Pizani
Summary: This manuscript presents an investigation of alamosite, PbSiO3, obtained by crystallization of lead metasilicate glass, PbO.SiO2. The study reveals the stable crystalline structure of PbSiO3 and provides important physical property parameters.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Andrey S. Barbosa, Ana Laura G. Biancolli, Alexandre J. C. Lanfredi, Orlando Rodrigues, Fabio C. Fonseca, Elisabete Santiago
Summary: This study presents a systematic analysis of the influence of irradiation conditions on the properties of radiation-induced grafted anion-exchange membranes. The control of irradiation temperature and atmosphere can improve the performance and stability of the membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Biomaterials
Freddy A. Nunez, Ana C. H. Castro, Vivian L. de Oliveira, Ariane C. Lima, Jamille R. Oliveira, Giuliana X. de Medeiros, Greyce L. Sasahara, Keity S. Santos, Alexandre J. C. Lanfredi, Wendel A. Alves
Summary: Even after over 2 years of the COVID-19 pandemic, research on rapid, inexpensive, and accurate tests remains essential for controlling and avoiding the global spread of SARS-CoV-2. Scientists have developed an impedimetric biosensor for COVID-19 serology testing, which showed high sensitivity and specificity in experiments with different samples.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Rogerio R. de Sousa Jr, Daniel A. Heinze, Joana B. Sacramento, Alexandre J. C. Lanfredi, Danilo J. Carastan
Summary: Elastomers based on block copolymers can form ordered nanoscale structures and are suitable for flexible conductive nanocomposites. The study investigated the morphological evolution of these elastomers and their electrical conductivity under large deformations. The findings showed that structural orientation significantly affects electrical conductivity and that carbon nanotubes accelerate the realignment process, resulting in changes in conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Freddy A. Nunez, Ana C. H. Castro, Isabela P. Daher, Edecio Cunha-Neto, Jorge Kalil, Silvia B. Boscardin, Alexandre J. C. Lanfredi, Vivian L. de Oliveira, Wendel A. Alves
Summary: The evaluation of serological responses to COVID-19 is crucial for population-level surveillance, developing new vaccines, and evaluating the efficacy of different immunization programs. A biosensor based on immobilization of the recombinant S protein on ZnONRs was employed for serological evaluation. The technology shows great potential for vaccine assessment and monitoring seroprevalence.
Article
Materials Science, Multidisciplinary
M. A. S. Mariano, A. D. Rodrigues, Y. Mendez-Gonzalez, E. C. Lima, J. D. S. Guerra
Summary: Ferroelectric materials have been extensively studied for their exceptional physical properties, showing promising applications in various fields. Lead titanate (PbTiO3, PT), with a tetragonal perovskite structure, has attracted considerable interest for infrared detectors. However, the microstructural properties of PT-based materials, especially in thin film form, are not yet fully understood. This study investigates the structural properties of PbTiO3 thin films using X-ray diffraction and Raman spectroscopy techniques, focusing on the influence of synthesis parameters such as pyrolysis temperature.
Article
Spectroscopy
R. B. Pena, T. R. Cunha, E. O. Gomes, D. V. Sampaio, A. D. Rodrigues, J. Andres, P. S. Pizani
Summary: In this study, the Raman vibrational modes, temperature wavenumber coefficients, and isobaric-mode Gruneisen parameters of monoclinic alamosite (PbSiO3) were characterized for the first time using density functional theory calculation and in situ unpolarized Raman measurements. No structural phase transition was observed, confirming the thermal stability of the monoclinic phase up to 1000 K.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Materials Science, Biomaterials
Freddy A. Nunez, Ana C. H. Castro, Vivian L. de Oliveira, Ariane C. Lima, Jamille R. Oliveira, Giuliana X. de Medeiros, Greyce L. Sasahara, Keity S. Santos, Alexandre J. C. Lanfredi, Wendel A. Alves
Summary: Research on rapid, inexpensive, and accurate tests for COVID-19 remains crucial for controlling the global spread of SARS-CoV-2. Serological assessment can support vaccine development and evaluate immunization efficacy. We developed a biosensor for COVID-19 serology testing using immobilized SARS-CoV-2 recombinant spike protein on modified electrodes.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Rodrigo S. N. Mancini, Amanda E. Sabaine, Carlos E. Castro, Juliana B. T. Carnielli, Reynaldo Dietze, Vivian L. de Oliveira, Alexandre J. C. Lanfredi, Lauro T. Kubota, Monica B. Mamian-Lopez, Wendel A. Alves
Summary: A fast and reliable antibody detection method for leishmaniasis was developed using citrate-capped gold nanoparticles conjugated with an immunogenic peptide. The method allows for indirect detection of the disease through surface-enhanced Raman scattering, showing potential for diagnosing this neglected tropical disease.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Aline Bastos de Paiva, Luis Miguel Bolanos Vargas, Matheus Jose da Silva, Ariano De Giovanni Rodrigues, Demetrio A. W. Soares, Marcelos Lima Peres, Marcio Peron Franco de Godoy
Summary: The main goal of this study is to describe the negative photoconductivity effect observed in Ag/AgO films grown by the spray-pyrolysis technique. The films exhibit high texturized AgO and metallic Ag phases, as shown by X-ray diffractograms. Scanning electron microscopy images reveal the presence of small Ag particles on the surface. The negative photoconductivity, with a photoresponse in the order of seconds, is strongly influenced by the optical absorbance and enhanced by surface plasmon resonance. The low-cost technique and the unique characteristics of negative photoconductivity provide an exciting platform for developing low-power optical-electronic devices.
Proceedings Paper
Materials Science, Multidisciplinary
Nubia Beatriz Sicchieri, Adenilson Jose Chiquito, Riama Coelho Gouveia
Summary: The objective of this study was to synthesize germanium nanowires, with and without the addition of copper dopant, for use as light sensors. Gold nanoparticles were formed by heat treatment and nanowires were synthesized using the VLS method. Among the twenty-five samples produced, seventeen met the desired dimensions and composition. The initial characterization showed that the germanium nanowires had semiconductor properties and could produce both ohmic and rectifier contacts. The study of optoelectronic properties revealed that samples with lower current in the dark had stronger photoresponde, and the photocurrent reached saturation rapidly.
MATERIALS TODAY-PROCEEDINGS
(2022)
