Article
Materials Science, Multidisciplinary
Seithati Qotso, Pontsho Mbule, Bakang Mothudi
Summary: ZnO nanorods were synthesized using microwave-assisted sol-gel method with 1-Thioglycerol as a capping agent. The study found that ZnO nanorods capped with a certain concentration of TG had the highest absorption efficiency and emission intensity. Doping with samarium and ytterbium increased the PL intensity. Incorporating the doped ZnO nanorods into P3HT resulted in significant quenching of PL intensity and improved electrical conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Arnab De, Bibek Samanta, Arnab Kumar Dey, Nisnat Chakraborty, Tapan Kumar Parya, Subhajit Saha, Uttam Kumar Ghorai
Summary: This study reports the synthesis of red light-emitting Li+ co-doped ZnAl2O4:Eu3+ nanophosphors via a modified sol-gel method, showing strong red emission and enhanced PL efficiency. Co-doping of Li+ leads to improved color coordinates, increased color purity, and reduced nonradiative transitions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Arnab De, Bibek Samanta, Arnab Kumar Dey, Nisnat Chakraborty, Tapan Kumar Parya, Subhajit Saha, Uttam Kumar Ghorai
Summary: This study reports the synthesis of red light-emitting Li+ co-doped ZnAl2O4:Eu3+ nanophosphors by a modified sol-gel route, showing enhanced red emission intensity, improved color purity, and reduced nonradiative transitions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xuwen Gao, Guocan Jiang, Cunyuan Gao, Anatol Prudnikau, Rene Huebner, Jinhua Zhan, Guizheng Zou, Alexander Eychmueller, Bin Cai
Summary: This study presents the design of quantum dot (QD) aerogels as novel Electrochemiluminescence (ECL) luminophores, enabling highly efficient fluorescence emission. The mechanism of ECL generation is verified through the experiment of mixed QD aerogels. This work contributes to the fundamental understanding of ECL and provides useful insights for designing next-generation QD-based devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Lyes Lamiri, Badis Kahouadji, Mourad Berd, Abdelmoumen Abdellatif, Lotfi Benchallal, Lakhdar Guerbous, Salim Ouhenia, Abdelhafid Souici, Leila Amiour, Abdelhalim Zoukel, Madani Samah
Summary: Nanosized 1 at% Sm3+ doped Y2O3 powders were synthesized using an ultrasound assisted sol-gel method, and their crystalline structure and properties were studied. The emission spectra showed two absorption bands at 223 nm and 407 nm, corresponding to the charge transfer state of O2- -> Sm3+ and the intra-configurational transition of Sm3+ ions, respectively. The dominant luminescence observed at 606 nm was assigned to the (4)G(5/2) -> H-6(7/2) transition. The photoluminescence intensity was significantly affected by the excitation wavelength, with 407 nm excitation resulting in a 60-fold decrease compared to 223 nm excitation. Decay time measurements revealed that the decay time of the nano-sized powder was much shorter than that of the bulk material.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Applied
Yuxuan Qi, Ruirui Yang, Yan Gao, Pengfei Jiang, Rihong Cong, Tao Yang
Summary: Rare earth pentaborates show potential as photoluminescent hosts for various rare earth activators. Energy transfer between Ce3+ and Tb3+/Dy3+ was observed through dipole-dipole electric interactions. The white emission of Dy3+ was enhanced by 20 times.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Multidisciplinary
Zhuoer Wang, Aiyou Hao, Pengyao Xing
Summary: This study reports a general method to build hydrogels from pi-conjugated amino acids with charge-transfer complexes, allowing for tunable response to circularly polarized light. The hybrid hydrogels showed adjustable photothermal performance and tunable Cotton effects from visible light to NIR-I region.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Ceramics
Smita Dey, Asit Kumar Kar
Summary: The study investigates the structural and optical properties of polypyrrole-ZnO composites with different amounts of ZnO, finding that the addition of ZnO slightly affects the conjugation of the polymer chain and causes a blue shift in the pi-pi* transition. The research uses a FRET model to theoretically predict the energy transfer efficiency, Forster radius, and separation between donor and acceptor, showing that tuning the ZnO content can adjust the emission properties of the PPy-ZnO composite.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jianfei Zhu, Yanfang He, Ying Yang, Yuan Liu, Mingming Chen, Dawei Cao
Summary: The construction of BiFeO3/Cu2O heterojunction on the surface of BiFeO3 significantly improved the photocurrent density and photoelectrochemical performance, providing a promising strategy for developing high-efficiency PEC electrodes.
Article
Optics
Vijay Singh, Pooja Rohilla, Sumandeep Kaur, A. S. Rao
Summary: In this study, Tb3+ activated Na3YSi2O7 phosphors with different amounts of Tb3+ ions were developed using sol-gel process. The structural analysis and luminescence behavior analysis confirmed the potential application of these phosphors in plasma display panels.
Article
Optics
Vijay Singh, Sumandeep Kaur, Arti Yadav, A. S. Rao
Summary: A series of calcium aluminate phosphors doped with Tm3+ ions at various molar concentrations were prepared via sol-gel route. Various characterizations were conducted to identify the structural and luminescence properties. The prepared phosphors exhibited excellent blue emission under n-UV excitation, making them potentially suitable for application as blue emitters in white LEDs.
Article
Optics
Vijay Singh, Rajamouli Boddula, G. N. Nikhare, Ji Bong Joo
Summary: The study successfully synthesized orange-red emitting Eu3+ doped CaAl4O7 phosphors with desired phase and good photoluminescence properties. The phosphors exhibit sharp emission peaks and high color purity in the orange-red region, making them suitable for applications in the field of luminescent materials.
Article
Materials Science, Ceramics
Shengjia Wang, Chenchen Xu, Xuebin Qiao
Summary: A series of Eu3+-activated Y2SiWO8 red phosphors were prepared and characterized, showing excellent emission intensity and optical properties. The optimum Eu3+ dopant concentration is 6%, with concentration quenching occurring beyond this concentration. Upon excitation by n-UV light, the phosphor emits a bright red light.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Naveen Kumar, Sanjeeb Limbu, Santosh Kumar Tripathi, Ram Narayan Chauhan
Summary: Cuprous oxide-based nanocrystals were synthesized using conventional sol-gel techniques at room temperature. The influence of Na ion on the optical and structural characteristics of the nanocrystals was systematically examined. X-ray diffraction analysis showed that Cu2O and Cu2O:Co nanocrystals had a cubic structure with average crystallite sizes of 41.70 and 43.00 nm, respectively. Photoluminescence and FT-IR spectra confirmed the presence of CuO phase due to Na and Co doping. HR-TEM micrograph revealed that the particle size ranged from 0.89 to 1.11 μm and agglomeration decreased with Na and Co doping concentration. The optical bandgap of Cu2O based nanocrystals was reduced, leading to improved optical absorption in the visible region. XPS measurement indicated the existence of multiple oxidation states of Cu and Co, and a single oxidation state of Na.
Article
Materials Science, Ceramics
Yung-Tang Nien, Chang-Han Tsai, Rui-He Zheng, Hong-Jun Ye
Summary: YAG:Ce prepared by sol-gel method and YAG:Ce post-treated with CO2 laser show differences in properties and morphology. Laser-sintered YAG:Ce powders exhibit higher luminescence efficiency, improved crystallinity, and smoother surface compared to sol-gel-derived powders.
CERAMICS INTERNATIONAL
(2021)
Article
Pharmacology & Pharmacy
Silvio Almeida Junior, Poliana Marques Pereira, Vanessa de Souza Totoli, Edna Sousa Neves, Mayara Monochio, Alef Winter Oliveira Alvarenga, Juliana Issa Hori, Wilson Rodrigues Braz, Lucas Alonso Rocha, Eduardo Jose Nassar, Marcela Aldrovani, Ricardo Andrade Furtado
Summary: The study found that incorporating indomethacin into mesoporous silica nanoparticles can effectively alleviate pain and inflammation, while reducing the gastric and hepatic damage caused by indomethacin.
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
(2021)
Article
Biochemical Research Methods
Julio Tadashi Tanaka, Susane Bonamin Moscardini, Willian Euripedes do Nascimento Melo, Helena Brunckova, Eduardo Jose Nassar, Lucas Alonso Rocha
Summary: The research discusses the factors influencing the emergence of a single YVO4 tetragonal phase and the optimal Nd3+ concentration for improving the infrared emission properties of YVO4:Nd phosphors. Results showed that a V5+/Y3+ molar ratio of 1.48 was the best composition to avoid undesired phases, while a sample containing 3.0% Nd3+ and annealed at 1000 degrees C exhibited the best infrared emission properties.
JOURNAL OF FLUORESCENCE
(2021)
Article
Chemistry, Physical
Helena Brunckova, Erika Mudra, Lucas Rocha, Eduardo Nassar, Willian Nascimento, Hristo Kolev, Alexandra Kovalcikova, Zuzana Molcanova, Maria Podobova, Lubomir Medvecky
Summary: The study reports the preparation of lanthanide metal-organic frameworks by solvothermal synthesis, showcasing different synthesis routes and modulation methods. By utilizing various ratios of lanthanide metals and co-doping, transparent thin films with excellent luminescence properties were successfully fabricated.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Danielle C. Baldini, Emerson H. de Faria, Katia J. Ciuffi, Lucas A. Rocha, Eduardo Jose Nassar
Summary: This study investigated the upconversion mechanism by doping erbium and ytterbium lanthanide ions into titanium oxide, using sol-gel methodology and spin-coating technique to prepare thin films. The films showed good optical transparency and exhibited distinct erbium ion emission spectra after thermal treatment.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jessica P. Batista, Henrique J. da Silva, Lucas A. Rocha, Eduardo J. Nassar
Summary: The study demonstrates that coatings obtained by the sol-gel methodology influenced the optical and electrical properties of solar cells and glass slides after coating and heat treatment. The transparency of the coating significantly affected the efficiency of the solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Leodoro P. dos Santos Filho, de F. P. Maria P. Nascimento, Liziane Marcal, Katia J. Ciuffi, Marcio L. A. e Silva, Eduardo J. Nassar, Lucas A. Rocha
Summary: The sol-gel process is an interesting strategy to obtain hybrid materials, with mesoporous silica showing large specific area and pore volume, and demonstrating efficient antimicrobial properties. Mesoporous silica matrixes prepared via the sol-gel process using surfactants and copolymers as structure-driving agents showed the most significant effects in the study.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Maria Gabriela Martins de Souza, Jessica Potomatti Batista, Emerson Henrique de Faria, Katia Jorge Ciuffi, Lucas Alonso Rocha, Eduardo Jose Nassar, Jorge Vicente Lopes da Silva, Marcelo Fernandes Oliveira, Izaque Alves Maia
Summary: To meet market and societal demands, the development of structured polymeric materials for medical applications is continually increasing. Metallic silver nanoparticles have been extensively explored for their antimicrobial properties. In this study, chemical methods were used to incorporate metallic silver nanoparticles into polymeric pieces obtained through additive manufacturing. The nanoparticles were successfully incorporated into the polymeric material and demonstrated interactions with the polyamide 12 nitrogen groups. These polymeric membranes containing metallic silver nanoparticles show promising potential for biomedical applications such as antimicrobial wound dressings and drug carriers.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Helena Brunckova, Lucas Alonso Rocha, Eduardo Jose Nassar, Susane Bonamin Moscardini, Hristo Kolev
Summary: Thin films of lanthanide orthoniobate LnNbO(4) and orthotantalate LnTaO(4) (Ln = Nd, Sm, Eu) were successfully fabricated using the sol-gel method and exhibited excellent luminescence properties, making them promising candidates for applications in sensors and imaging equipment.
Article
Materials Science, Ceramics
Vicente Vargas, Anastasiya Sedova, Jesus Uriel Balderas, S. Carmona-Tellez, Ivan Merlin, Lucas Rocha, Ciro Falcony
Summary: The luminescent characteristics of spherical hafnia/silica (HfO2/SiO2) nanoparticles co-doped with Tb3+/Yb3+ were analyzed. SiO2 and Tb3+/Yb3+ were found to induce a cubic phase in HfO2. The luminescent spectra showed characteristic emissions from Tb3+ and Yb3+ ions with excitation at 270 nm. Under solid-state laser excitation at 980 nm, upconversion emissions related to Tb3+ were observed. Energy transfer efficiency from Tb3+ to Yb3+ was determined to be in the range of 29.2% to 40.8% based on luminescence intensity analysis and time decay.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Luzio G. Bocalon, Marcos G. Tozatti, Ana H. Januario, Patricia M. Pauletti, Marcio L. A. Silva, Lucas A. Rocha, Eduardo F. Molina, Mario F. C. Santos, Wilson R. Cunha
Summary: Drug delivery systems are technologies that have been extensively studied and applied to enhance the application of existing drugs and improve the bioavailability of compounds of interest. This study successfully incorporated betulinic acid (BA) into mesoporous silica materials and investigated the characteristics and release mechanisms of the nanoparticles. The results demonstrate the potential use of these nanoparticles in drug delivery systems.
ANALYTICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Lidia Resende Oliveira, Eduardo Jose Nassar, Hernane da Silva Barud, Jhonatan Miguel Silva, Lucas Alonso Rocha
Summary: Organic-inorganic composites have many potential commercial applications due to their combination of the chemical and thermal stability of inorganic oxides and the processability and flexibility of organic compounds and polymers.
Article
Chemistry, Multidisciplinary
Daniel Aparecido Pires, Henrique Jose da Silva, Lucas Alonso Rocha, Eduardo Jose Nassar
Summary: This article introduces a simple portable system based on the Peltier principle for spectral characterization of compounds with temperature-dependent structure. The device is constructed and adapted to different equipment and evaluated using commercial thermochromatic inks, demonstrating its characterization performance under temperature changes.
Article
Chemistry, Multidisciplinary
Guilherme Augusto Bertelli Fernandes Clemente, Gustavo Henrique Goncalves, Eduardo Jose Nassar, Eduardo Ferreira Molina, Lucas Alonso Rocha
Summary: The study focuses on presenting hybrid materials as an alternative for anticorrosive coatings on metallic surfaces, specifically steel. Through qualitative and exploratory research based on academic works, it is demonstrated that hybrid materials or nanocomposites are efficient in protecting steel against oxidation.
Article
Chemistry, Inorganic & Nuclear
Helena Brunckova, Erika Mudra, Lucas Rocha, Eduardo Nassar, Willian Nascimento, Hristo Kolev, Maksym Lisnichuk, Alexandra Kovalcikova, Zuzana Molcanova, Magdalena Streckova, Lubomir Medvecky
Summary: This study successfully synthesized lanthanide metal-organic frameworks with excellent luminescence properties, confirmed by XPS analysis of surface chemistry compositions and mixed valence states. These novel materials exhibit superior red emission suitable for commercial phosphor applications and show potential as UV light sensors for biological applications.
Article
Chemistry, Multidisciplinary
Kalil Z. R. de Sousa, Emerson H. de Faria, Liziane Marcal, Katia J. Ciuffi, Emiliane G. Ricci, Lucas A. Rocha, Eduardo J. Nassar, Jorge V. L. Silva, Marcelo F. Oliveira, Izaque A. Maia
Summary: Incorporation of rhodamine into polyamide membranes was successfully achieved using additive manufacture selective laser sintering technology. The amount of dye incorporated was determined by a calibration curve, showing concentration on the order of 10-6 mol L-1. Spectral analyses revealed the formation of a dimer after rhodamine incorporation, with maximum absorption at 553 nm. Acid-treated membranes showed faster adsorption time compared to non-treated or base-treated membranes, demonstrating polyamide membrane as an excellent material for luminescent sensors.
Article
Materials Science, Multidisciplinary
Yanbin Wang, Xinyou Huang, Ziqiu Cheng, Penghui Chen, Yuyang Chen, Junhao Ye, Haohong Chen, Zhenzhen Zhou, Denis Yu Kosyanov, Jiang Li
Summary: Uniform Al2O3-Ce:LuAG composite phosphor ceramics (CPCs) with excellent luminescent properties and thermal stability have been successfully synthesized in this study, showing great potential for application in solid-state laser lighting.
Article
Materials Science, Multidisciplinary
Syed Muhammad Ali Zaidi, Mazhar Ali Kalyar, Zulfiqar Ali Raza, Aayesha Shoukat, Rubaila Waseem, Muhammad Aslam
Summary: Polyvinyl alcohol (PVA) nanocomposite strips embedded with graphene nanosheets and copper-ferrite nanoparticles were synthesized using solution casting technique. Laser pulse irradiations were then applied to modify the structural, optical, and electrical properties of the strips, showing potential for optoelectronic devices.
Article
Materials Science, Multidisciplinary
Yunru Chen, Jialing Wu, Jiajia Wang, Shihui Ma, Hongwei Yu
Summary: This paper investigates the angular non-critical phase-matching second-harmonic-generation properties of Ba3(ZnB5O10)PO4 crystal and explores its potential applications in the output spectral regions.
Article
Materials Science, Multidisciplinary
Qun Jing, Menglin Zhu, Lu Li, Xu Ji, Haiming Duan, Henglei Chen, Ming-Hsien Lee
Summary: The paper introduces two new nonlinear optical materials, MZnPO4 (M = Rb, Cs), synthesized by cation substitution. These materials exhibit a honeycomb-like structure and show mild SHG responses with short absorption edges. The thermal properties, IR spectra, and theoretical calculations of the materials are also discussed.
Article
Materials Science, Multidisciplinary
Camila Ianhez-Pereira, Akhil Kuriakose, Ariano De Giovanni Rodrigues, Ana Luiza Costa Silva, Ottavia Jedrkiewicz, Monica Bollani, Marcio Peron Franco de Godoy
Summary: This study aims to evaluate the crystalline changes induced by ultrafast laser micromachining on manganese oxide thin films using micro-Raman spectroscopy. The results show that laser-writing is effective in locally modifying low-crystallinity films and increasing crystallite sizes, highlighting an interesting approach to evaluate laser-induced structural modifications on metal oxide thin films.
Article
Materials Science, Multidisciplinary
Kamal Bansal, Neeraj Kumar Mishra, Ibrahim Abdullahi, Param Jeet Singh, Mohit Tyagi, Sukhpal Singh
Summary: A novel Sm3+ activated oxyfluoride glass was synthesized and its structure and properties were analyzed. The glass showed potential applications in lasers, optical temperature sensing, and high-energy scintillators.
Article
Materials Science, Multidisciplinary
Xingjian Wang, Zhixu Wu, Jiawei Zhu, Yubin Kang, Mengqiang Cai, Yong Xia, Hui Deng
Summary: Antimony sulfide (Sb2S3) has been investigated as a promising material for visible light photodetectors due to its non-toxicity, stability, and high absorption coefficient. In this study, we systematically explored the impact of key parameters on the performance of Sb2S3 devices using simulation and successfully fabricated self-powered photodetectors with high responsivity and specific detectivity. Furthermore, we demonstrated the application of the Sb2S3 detector in a scanning imaging system, showcasing its potential for developing new types of visible light detectors and imaging systems.
Article
Materials Science, Multidisciplinary
O. I. Sallam, R. M. Ahmed
Summary: The 20NaF-60P2O5-20Na2O fluorophosphate glass systems doped with 3 wt% of CoO and NiO were investigated for their optical parameters before and after gamma irradiation. The presence of defects within the glass network and the addition of transition metals were found to affect the properties of the composites. After irradiation, a red shift was observed in the dissipation factor spectrum. The energy lost at the surface of the composites was larger than the energy lost within the constituent materials. All investigated composites showed insulating behavior and exhibited increased nonlinear optical parameters after irradiation, with the CoO-doped composite showing the highest values.
Article
Materials Science, Multidisciplinary
Fahimeh Ahmadi, Zeinab Ebrahimpour, Asghar Asgari, Bao Van
Summary: In this study, Er3+-doped sulfophosphate glasses containing titanium nanoparticles (TiO2 NPs) and different concentrations of silver nanoparticles (AgNPs) were synthesized. The impact of AgNPs on the physical and structural characteristics, optical absorption and emission features, and photocatalytic activity of the glasses were investigated. The results showed that the addition of AgNPs enhanced the emission intensity of the glasses, with the system containing 0.04 mol% of AgNPs exhibiting optimal performance. Furthermore, the presence of AgNPs and TiO2 NPs in the glass matrix positively affected the photocatalytic performance.
Article
Materials Science, Multidisciplinary
Zhuang Li, Rongfei Huang, Wei Yuan, Shaoqiang Zheng, Wenlu Liao, Huiying Xu, Zhiping Cai
Summary: This study reports the first realization of an 868 nm Pr:YLF laser pumped by an InGaN blue laser diode. The laser achieved a maximum power of 641 mW with stable output and good beam quality. The experimental results were in agreement with theoretical simulations.
Article
Materials Science, Multidisciplinary
Bhishma Karki, Youssef Trabelsi, Amrindra Pal, Sofyan A. Taya, Ram Bharos Yadav
Summary: This study proposes an SF11 Prism- Ag- ZnO nanowires-CeO2-Sensing layer-based surface plasmon resonance sensor for measuring dopamine concentration in human blood. The sensor demonstrates high sensitivity and detection accuracy, and holds significant importance for early diagnosis of neurological diseases.
Article
Materials Science, Multidisciplinary
M. Taoufiq, A. Soussi, A. Elfanaoui, A. Ait Hssi, S. Baoubih, A. Ihlal, K. Bouabid
Summary: In this study, the effect of copper doping within ZnS on glass substrates was investigated through experimental and theoretical approaches. Pure ZnS and Cu-doped ZnS films with varying copper concentrations were deposited on glass substrates using the SILAR technique. The structural, morphological, and optical properties of the films were characterized, and the theoretical FP-LAPW method based on density functional theory was employed to study the properties of copper-doped ZnS.
