Article
Materials Science, Multidisciplinary
Subrata Pramanik, Jiten Ghosh, Dipak Kumar Chanda, Mrinmay Kumar Mukhopadhyay, Alokmay Datta
Summary: Silica films spin-coated from a Tetraethyl Orthosilicate (TEOS) precursor on Al substrates exhibit highly porous nanocrystalline silica top layer with a defined silica-hydrated alumina interface. The silica nanocrystals are found in metastable high pressure cristobalite phases, coexisting with tetragonal or alpha-phase structures, indicating development of high normal stress from confinement. The confinement force is quantitatively assessed to be higher than van der Waals force but weaker than Hydrogen bonding force.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Optics
Kang-Hyok O, Kwang-Hyon Kim
Summary: Topological photonic crystal fibers (PCFs) have been proposed as a new category of photonic topological systems, which can achieve supercontinuum (SC) generation with waveguiding corner modes. The proposed topological PCF with hexagonal holey photonic crystals of chalcogenide material exhibits high nonlinearity, enabling octave-spanning SC generation with low pump energy at 1550 nm. Unlike non-topological PCFs, the dispersion characteristics and SC spectra of topological PCFs are immune to structural defects. This work paves the way towards nonlinear fiber optics with structural defects-immune performances.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
O. Kang-Hyok, Kwang-Hyon Kim
Summary: Topological photonics has sparked great interest in the photonics community for its fundamental and practical significance. Topological photonic crystal fibers (PCFs) have been proposed as a new category of photonic topological systems, with high nonlinearity and immunity to structural defects.
OPTICS COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Mayur Kumar Chhipa, B. T. P. Madhav, Bhuvneshwer Suthar, Vijay Janyani
Summary: In this study, a high-speed optical encoder based on a two-dimensional photonic crystal ring resonator was proposed using coupled mode theory and resonance effect. By optimizing the structure design, the encoder achieved fast response time, high data rate, and ultra-compact size. The proposed device is suitable for high-speed optical computation in photonic integrated circuits.
PHOTONIC NETWORK COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Lidong Wang, Meisong Liao, Fei Yu, Liang Chen, Yazhou Wang, Dakun Wu, Tianxing Wang, Lili Hu, Weiqing Gao
Summary: Hollow core photonic bandgap fiber (HC-PBGF) has potential applications in fiber optics gyroscopes (FOGs) due to its low nonlinearity and excellent environmental adaptability. However, the complex structure of HC-PBGF makes it prone to defects during fabrication, resulting in degradation of fiber uniformity and optical properties. In this study, we investigated the instability factors encountered in the fabrication process of polarization-maintaining (PM) HC-PBGF, including defects in the fiber core, core-side hole, and fiber diameter. We found that the diameter defect had the greatest impact on fiber properties, while the core-side hole defect had the weakest impact. Our findings provide a theoretical reference for fiber fabrication and reveal the structural deviation tolerance of PM HC-PBGF.
IEEE PHOTONICS JOURNAL
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Soibam Aruna Chanu, Ramesh Kumar Sonkar
Summary: This paper investigates the band structure of hexagonal lattice 2D photonic crystals with hole arrays in a dielectric slab with silica as upper and lower cladding. Slab height and radius of holes are varied with respect to the lattice constant to observe band structures for silicon and silicon-germanium dielectric media. Optimum values of the parameters are obtained for the widest bandgap considering the vertical confinement and the bandgap is optimized for C-band applications.
2022 WORKSHOP ON RECENT ADVANCES IN PHOTONICS (WRAP)
(2022)
Article
Optics
Rocio Estefania Rojas-Hernandez, Luis F. Santos, Rui M. Almeida
JOURNAL OF LUMINESCENCE
(2018)
Article
Materials Science, Multidisciplinary
Rocio Estefania Rojas-Hernandez, Luis F. Santos, Rui M. Almeida
Article
Biochemistry & Molecular Biology
Joana C. Matos, Claudia Oliveira, M. Clara Goncalves
Article
Chemistry, Multidisciplinary
Joana C. Matos, M. Clara Goncalves, Laura C. J. Pereira, Bruno J. C. Vieira, Joao Carlos Waerenborgh
Article
Energy & Fuels
R. C. Souza, B. A. F. Santos, M. C. Goncalves, E. P. Mendes Junior, T. A. Simoes, J. R. Oliveira, G. L. Vaz, L. Caldeira, J. A. C. P. Gomes, A. H. Bueno
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Instruments & Instrumentation
D. Nd Faye, M. Dias, R. E. Rojas-Hernandez, N. Sousa, Luis F. Santos, Rui M. Almeida, E. Alves
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2019)
Article
Materials Science, Ceramics
Rocio Estefania Rojas-Hernandez, Luis F. Santos, Rui M. Almeida
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Ceramics
Rui M. Almeida, N. Sousa, R. E. Rojas-Hernandez, Luis F. Santos
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Ines Peixoto, Monica Faria, M. Clara Goncalves
Article
Chemistry, Multidisciplinary
Joana C. Matos, Marco Laurenti, Veronica Vighetto, Laura C. J. Pereira, Joao Carlos Waerenborgh, M. Clara Goncalves, Valentina Cauda
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Applied
Monica C. Andrade, Jose Carlos Pereira, Nuno de Almeida, Paula Marques, Monica Faria, M. Clara Goncalves
Summary: By adding tetraethylorthosilicate and 3-(aminopropyl)triethoxysilane to the CA casting solution, monophasic hybrid membranes were fabricated, improving hydraulic permeability, rupture elongation, and reducing Young modulus. Intensive cross-linking between CA-silica chains was observed with high propyl-amine contents, reversing the behavior.
CARBOHYDRATE POLYMERS
(2021)
Review
Chemistry, Physical
Daniel Alves Barcelos, Diana C. Leitao, Laura C. J. Pereira, Maria Clara Goncalves
Summary: Inorganic glass, as a transparent functional material, plays a crucial role in opto-electronic devices and smart materials applications, providing vast growth opportunities in the market. It is the only material that is 100% recyclable and can utilize other industrial residues as raw materials. Various fabrication techniques allow inorganic glass to be produced in different forms, and it finds wide applications in areas such as magnetic glass, solar cells, and smart materials.
Article
Pharmacology & Pharmacy
Veronica Vighetto, Luisa Racca, Marta Canta, Joana C. Matos, Bianca Dumontel, Maria Clara Goncalves, Valentina Cauda
Summary: Nanomedicine is an emerging treatment approach for cancer, utilizing smart nanoparticles with high sensitivity and selectivity to reduce toxic effects of conventional chemotherapy, where amorphous-titania propyl-amine functionalized nanoparticles coated with bovine serum albumin are stimulated by high energy shock waves to induce cytotoxic effects in cancer cells.
Article
Biochemistry & Molecular Biology
Adriana Janeca, Flavia S. C. Rodrigues, Maria Clara Goncalves, Monica Faria
Summary: A novel cellulose acetate-based monophasic hybrid skinned amine-functionalized membrane was synthesized, characterized, and evaluated for its permeation properties, showing excellent permeability and rejection selectivity towards various solutes such as urea, creatinine, and uric acid while retaining albumin.
Article
Biochemistry & Molecular Biology
Fahimeh Zare, Adriana Janeca, Seyyed M. Jokar, Monica Faria, Maria Clara Goncalves
Summary: Chronic kidney disease (CKD) is a serious threat to public health, especially in the US where the number of end-stage kidney disease (ESKD) patients has increased significantly. Protein-bound uremic toxins (PBUTs) are not effectively removed by traditional haemodialysis (HD), leading to their accumulation and worsening of patients' conditions. Various techniques have been proposed to improve the removal of PBUTs, with binding competition showing promising potential.
Article
Materials Science, Ceramics
Deniz Bozoglu, Sahin Yakut, Kemal Ulutas, Deniz Deger
Summary: Thin film polyethylene oxide, produced by the thermal evaporation technique, exhibits structural and property differences compared to bulk polyethylene oxide. The dielectric constant of polyethylene oxide thin film is 10 times greater than that of bulk polyethylene oxide. There is consistency among dielectric constants, activation energies, and free volume fractions for both thin film and bulk samples. Polyethylene oxide thin film is observed to be more brittle than bulk polyethylene oxide.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Xiaozhen Fan, Zhuo Wang, Zheng Fang, Huiqun Ye, Jinju Zheng, Jianqiang Zhang, Yanjun Qin, Yao Zhai, Yanlong Miao, Zixiang Zhao, Can Yang, Jiajun He, Zhenghang Wei, Yunzhang Fang
Summary: The microscopic strain evolution and microstructural of FeCuNbSiB amorphous alloy samples were studied under both free and tensile stress annealing conditions. It was found that an amorphous-nanocrystalline structure was developed in both samples after annealing at 813 K, and the size of nanocrystals was limited by the applied stress.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Atsushi Tanaka, Atsuki Saito, Takashi Murata, Ayako Nakata, Tsuyoshi Miyazaki
Summary: Although molecular dynamics (MD) simulation is a powerful tool for investigating the atomic-scale structures of complex materials, its reliable and accurate application to multi-component glass systems faces challenges due to limited force fields (FFs) and the complexity of chemical environments. This study demonstrates the feasibility of efficient and accurate large-scale density functional theory (DFT) calculations for multi-component glass systems. The evaluation of classical FFs based on the results of large-scale DFT calculations reveals low accuracy for non-bridging oxygen atoms, and differences in Si-O-Si angle distribution and electronic structure for X = Mg.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Petr Shvets, Ksenia Maksimova, Aleksandr Goikhman
Summary: In this study, vanadium oxide xerogel samples were successfully synthesized through a liquid phase reaction and the interaction of films with water. The samples were thoroughly analyzed using X-ray diffraction and Raman spectroscopy, revealing the existence of two distinct phases. It was also discovered that previous misinterpretations regarding the high-pressure polymorph structure were due to the formation of a high-temperature phase. These findings highlight the potential for further refining and expanding the current structural models of vanadium oxide xerogel in future research efforts.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Yiran Zhang, Jing Pang, Qingchun Xiang, Dong Yang, Yinglei Ren, Xiaoyu Li, Keqiang Qiu
Summary: The effect of the volume fraction of body-centered cubic (BCC) crystal on the room temperature brittleness of Fe-based amorphous nanocrystalline alloys was investigated. Molecular dynamics simulations were conducted to obtain seven model samples with different embedded BCC nanocrystal contents. The results showed a gradient decrease in the plasticity of the alloys with different nanocrystal contents.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Moustafa Sahnoune Chaouche, Hani K. Al-Mohair, Shavan Askar, Barno Sayfutdinovna Abdullaeva, Naseer Ali Hussien, Ahmed Hussien Alawadi
Summary: In this work, a novel micromechanical data-driven machine learning framework was proposed to characterize material parameters in bulk metallic glasses. The framework utilized nanoindentation simulations with Berkovich and spherical tips to compile a vast collection of data on material behavior in BMGs. The developed machine learning model efficiently predicted critical material properties and highlighted the importance of input feature weight functions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Louisiane Verger, Vinuyan Ganesaratnam, Virginie Nazabal, Sebastien Chenu, Christophe Calers, David Le Coq, Laurent Calvez, Olivier Hernandez, Xiang-Hua Zhang
Summary: Crystallization in Ga, Sb, and Se glasses was studied, and a correlation between Se content, crystalline phases, and electrical conductivity was observed. The resulting glass-ceramics exhibited significantly higher conductivity compared to other Se-based glass-ceramics.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Seong-Sik Shin, Ga-Yeong Kim, Byeonggwan Lee, Jae-Hwan Yang, Yeon-Su Son, Jung-Hoon Choi, Jae-Young Pyo, Ki Rak Lee, Hwan-Seo Park, Hyun Woo Kang
Summary: In this study, silver tungstate-tellurite glass with different loading of AgI was developed for immobilization of radioactive iodine. The effects of increasing the amount of AgI on the glass matrix were investigated. The leaching properties of all samples were evaluated, and it was found that the release of all elements satisfied the US regulation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Chunghee Nam
Summary: This study demonstrates the prediction performance of a CNN regression model for the magnetic entropy changes and transition temperatures of bulk metallic glasses with magnetocaloric effects. The model achieved high prediction performance, as measured by the determination coefficient and root mean square error. The results showed good agreement with experimental values and reported results.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
A. Hosny, Y. M. Moustafa, G. El-Damrawi
Summary: In this study, crystalline glass ceramics were obtained directly from glasses using an ion exchange process between lead bromide and oxygen ions. The addition of lead bromide caused significant changes in the glass structure and the formation of specific crystalline phases.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Luana Cristina Feitosa Alves, Jheimison Ferreira Gomes, Natacya Fontes Dantas, Maria Nayane Queiroz, Pablo Nabuco Portes, Francielle Sato, Nilma de Souza Fernandes, Karina Miyuki, Celso Vataru Nakamura, Alysson Steimacher, Franciana Pedrochi
Summary: This study evaluated the influence of CaF2 addition on the bioactivity of the samples. The results showed that the samples exhibited good bioactivity and cytocompatibility, making them suitable for biomedical applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
N. Keninger, S. Feller
Summary: The principles of Topological Constraint Theory (TCT) were used to study alkali borate and silicate glass systems. Structural models were developed based on experimental data and used to predict properties of the glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Hao Wang, Chengliang Zhao, Chuntao Chang, Shengli Zhu, Zhankui Zhao
Summary: The relationship between the heterogeneous structure and structural relaxation in metallic glasses was explored by investigating the quasielastic and viscoelastic behavior of a Zr55Cu30Ni5Al10 metallic glass. Stress-annealing treatment was used to retain elastic strain energy, and a unique creep recovery phenomenon was observed during the reheating process. The Maxwell model was employed to qualitatively describe the mechanisms of elastic strain energy retention and release.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Sihyung Lee, Giyeol Han, Karuppasamy Pandian Marimuthu, Hyungyil Lee
Summary: This study presents a method for extracting FVM parameters of Zr-based TFMG using MD and FEA, and validates the method through simulation and experiments.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Nedra Saad, Mohamed Haouari, Mayssa Ibrahim, Noura Amamou
Summary: In this work, we investigated the optical properties of a fluorophosphate glass system doped with Tb3+ and Eu3+ ions. We found that the emitted light can be tuned by changing the doping concentration, excitation wavelength, or excitation power, which is important for the design of solid-state lighting sources.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)