Article
Materials Science, Multidisciplinary
Christian Saringer, Michael Tkadletz, Josef Thurner, Christoph Czettl, Nina Schalk
Summary: Using thermally activated chemical vapor deposition (CVD), Ti1-xAlxN coatings with Al contents up to x > 0.8 can be synthesized due to their high global Al content and self organized nanolamellar microstructure. However, the formation mechanism of the microstructure and the resulting coating properties are not fully understood. The study investigates the effects of deposition temperature, pressure, and gas feed rotation speed on the microstructure and mechanical properties.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Bhaskar Bhaduri
Summary: In this study, copper nanoparticles grown carbon nanofibers (Cu-CNFs) were synthesized on graphite powder using catalytic chemical vapor deposition (CVD) method with acetylene as the carbon source. The CNFs were heat treated under inert atmosphere, and the analysis showed that the synthesis followed tip growth mechanism, with the material being of high purity confirmed by EDS and XPS analysis.
Article
Materials Science, Ceramics
H. Plaisantin, J. Danet, I. Berdoyes, G. Laduye, A. Desenfant, G. Chollon
Summary: Chemical vapor deposited SiC coatings were examined using X-ray diffraction, Raman microspectroscopy, and transmission electron microscopy. Different (micro)structures were observed based on specific preparation conditions, showing varying levels of disorder. The coatings exhibited a columnar morphology with a preferred orientation and a faulted cubic structure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Yajuan Xie, Chengwen Tan, Xiaodong Yu, Zhihua Nie, Zhichao Liu
Summary: In this study, tungsten coatings were deposited at 300-610 degrees C from WF6 and H-2 by atmospheric pressure chemical vapor deposition (APCVD). It was found that regardless of the density of the coating, tungsten powders adhered to the furnace walls. These powders were produced by homogeneous reactions in the gas phase near the substrate and adhered to the inner wall of the furnace as they moved with the fluid. The study discussed the kinetics, structure, and growth mode of tungsten coatings in the APCVD system, highlighting the contributions of homogeneous reactions to the growth of dense tungsten coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
S. Sanders, G. Simkus, J. Riedel, A. Ost, A. Schmitz, F. Muckel, G. Bacher, M. Heuken, A. Vescan, H. Kalisch
Summary: The study successfully produced uniform pinhole-free CsPbBr3 films for PeLED application using a highly scalable showerhead-assisted chemical vapor deposition method. Process conditions for CsBr-rich, stoichiometric, and PbBr2-rich CsPbBr3 layer growth were developed by adjusting the deposition parameters. Although the device efficiency still needs improvement, this represents the first demonstration of PeLEDs containing CsPbBr3 films processed in a perovskite showerhead-assisted CVD reactor.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Physical
Qing Zhang, Wanzhen He, Lin Li, Dechao Geng, Zhiping Xu, Huipeng Chen, Wei Chen, Wenping Hu
Summary: This study demonstrates a facile and controllable oxygen-assisted anisotropic chemical etching method for two-dimensional (2D) materials, using MoSe2 as an example. A series of well-defined etched patterns were fabricated by precisely modulating the pretreatment time of oxygen plasma and the etching time. The atomic characterization and density functional theory calculations indicate an energy preference for zigzag edges, and the as-etched MoSe2 flakes exhibited enhanced optoelectronic properties.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sunwen Zhao, Yanhui Zhang, Shuang Wang, Dongyang Zhao, He Kang, Jing Li, Runhan Xiao, Ziqiang Kong, Zhiying Chen, Yanping Sui, Jianlu Wang, Yan Chen, Guanghui Yu
Summary: In this study, a simple and scalable synthesis method for WS2 bilayers was demonstrated using chemical vapor deposition (CVD) by finely controlling the time of introducing sulfur. The as-grown bilayer WS2 exhibited uniform single crystal quality as confirmed by optical and microstructural characterization. The photodetector based on bilayers WS2 showed relatively good performance.
Article
Materials Science, Multidisciplinary
Mohammad Reza Rahmani Taji Boyuk, Hajar Ghanbari, Abdolreza Simchi, Ali Maghsoumi
Summary: Under special conditions in seedless CVD, large-area 2D WS2 layers with disc-shaped morphology can be grown, which is attractive for the fabrication of optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Xiucai Sun, Xiaoting Liu, Zhongti Sun, Xintong Zhang, Yuzhu Wu, Yeshu Zhu, Yuqing Song, Kaicheng Jia, Jincan Zhang, Luzhao Sun, Wan-Jian Yin, Zhongfan Liu
Summary: This study reveals the importance of vapor catalysis in superclean graphene growth through density functional theory calculations, an ideal gas model, and a designed experiment. The study finds that the vapor mainly consists of Cui clusters, which have a significant impact on graphene growth. DFT calculations show that Cu clusters exhibit strong capabilities for adsorption, dehydrogenation, and decomposition, providing a sufficient supply of active carbon atoms for rapid graphene growth. Experimental validation confirms that increasing the amount of Cu vapor improves the growth rate and surface cleanliness of graphene.
Article
Chemistry, Physical
Ben McLean, Izaac Mitchell, Feng Ding
Summary: This study reveals the mechanism of single-walled carbon nanotube (SWCNT) growth in alcohol chemical vapor deposition (ACVD) through density functional tight binding molecular dynamics simulations. The results demonstrate that the catalyst composition can be controlled by reaction pathways mediated by hydroxyl OH radicals, leading to promotion of SWCNT growth.
Article
Nanoscience & Nanotechnology
Kenjiro Hayashi, Naoki Fushimi, Masako Kataoka, Daiyu Kondo, Shintaro Sato
Summary: This study presents a new approach to reveal the grain structure of turbostratic multilayer graphene (MLG) using transmission electron microscopy (TEM) observation. Mechanical delamination is demonstrated to peel off the topmost graphene layers of the MLG, and patterning of the MLG prior to delamination is found to be effective for obtaining graphene films with desired shape and arrangement.
Article
Chemistry, Physical
Guanmeng Li, Weifeng Zhang, Yan Zhang, Yangjin Lee, Zihan Zhao, Xue-zhi Song, Zhenquan Tan, Kwanpyo Kim, Nan Liu
Summary: Synergistic additives, ammonium salts, have been used in the chemical vapor deposition (CVD) growth of MoS2 to achieve controlled domain layering and shape, as well as centimeter-scale films. This method enables direct fabrication of MoS2 electronic devices on clean substrates without the need for transfer steps, and it also promotes improved hydrogen evolution reaction (HER) performance. The use of ammonium salts in CVD paves the way for practical applications of MoS2 in modern electronics and catalysis.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Ivan S. Pavlov, Anna G. Ivanova, Vladimir P. Filonenko, Igor P. Zibrov, Alexei E. Voloshin, Pavel V. Zinin, Alexander L. Vasiliev
Summary: This study investigates the formation of boron carbide superhard particles through a liquid-phase reaction at high pressure and high temperature. The synthesized particles exhibit a rhombic hexecontahedron morphology with twelve five-vertex stars. Electron microscopy and X-ray diffraction were used to analyze the crystal structure of these particles, revealing multiple cycling twinning rather than quasi-crystalline symptoms. The specific shape of the particles is explained by the decrease of surface energy during formation at high pressure and high temperature.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Mario Moreno, Arturo Ponce, Arturo Galindo, Eduardo Ortega, Alfredo Morales, Javier Flores, Roberto Ambrosio, Alfonso Torres, Luis Hernandez, Hector Vazquez-Leal, Gilles Patriarche, Pere Roca Cabarrocas
Summary: Hydrogenated microcrystalline silicon and epitaxial silicon films were produced using PECVD, with the H2/SiF4 ratio found to impact the crystalline silicon content and film structure. Understanding these conditions is crucial for the development of thin film transistors and thin film solar cells.
Article
Materials Science, Multidisciplinary
Zhuorui Lu, Natalia Vakula, Michele Ude, Martiane Cabie, Thomas Neisius, Francois Orange, Franck Pigeonneau, Laeticia Petit, Wilfried Blanc
Summary: For the first time, MCVD germanosilica glass embedded with YbPO4 crystals were drawn into optical fibers. The YbPO4 crystals were successfully embedded in the silica soot using solution doping prior to the collapsing step. Through analysis with scanning/transmission electron microscopes and confocal Raman microscope, it was demonstrated that the YbPO4 crystals survived both the MCVD process and the drawing process, despite the high temperature (up to 2100 degrees C) involved. The fiber contained 100 nm-crystals with the same composition and structure as the as-prepared crystals, and during the drawing process, these crystals showed a preferential orientation along the c-axis.
Article
Engineering, Electrical & Electronic
A. Perez-Campos, G. F. Iriarte, J. Hernando-Garcia, F. Calle
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2015)
Article
Engineering, Electrical & Electronic
A. Perez-Campos, G. F. Iriarte, V. Lebedev, F. Calle
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2016)
Article
Instruments & Instrumentation
M. Sinusia Lozano, Z. Chen, Oliver A. Williams, G. F. Iriarte
SMART MATERIALS AND STRUCTURES
(2018)
Article
Materials Science, Multidisciplinary
M. Sinusia Lozano, A. Perez-Campos, M. Reusch, L. Kirste, Th Fuchs, A. Zukauskaite, Z. Chen, G. F. Iriarte
MATERIALS RESEARCH EXPRESS
(2018)
Article
Materials Science, Multidisciplinary
G. F. Iriarte
CURRENT APPLIED PHYSICS
(2011)
Article
Engineering, Electrical & Electronic
J. G. Rodriguez-Madrid, G. F. Iriarte, J. Pedros, O. A. Williams, D. Brink, F. Calle
IEEE ELECTRON DEVICE LETTERS
(2012)
Article
Engineering, Industrial
G. F. Iriarte, J. G. Rodriguez-Madrid, F. Calle
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2012)
Article
Engineering, Electrical & Electronic
Ana Perez-Campos, Gonzalo Fuentes Iriarte, Vadim Lebedev, Fernando Calle
JOURNAL OF MICRO-NANOLITHOGRAPHY MEMS AND MOEMS
(2014)
Article
Chemistry, Multidisciplinary
G. F. Iriarte
JOURNAL OF NANOPARTICLE RESEARCH
(2011)
Article
Materials Science, Multidisciplinary
J. G. Rodriguez-Madrid, G. F. Iriarte, D. Araujo, M. P. Villar, O. A. Williams, W. Mueller-Sebert, F. Calle
Article
Engineering, Electrical & Electronic
F. Lloret, D. Araujo, M. P. Villar, J. G. Rodriguez-Madrid, G. F. Iriarte, O. A. Williams, F. Calle
MICROELECTRONIC ENGINEERING
(2013)
Article
Engineering, Electrical & Electronic
G. F. Iriarte, J. G. Rodriguez, F. Calle
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2011)
Article
Engineering, Electrical & Electronic
J. G. Rodriguez-Madrid, G. F. Iriarte, O. A. Williams, F. Calle
SENSORS AND ACTUATORS A-PHYSICAL
(2013)
Article
Materials Science, Multidisciplinary
Miguel Sinusia Lozano, Zhuohui Chen, Oliver A. Williams, Gonzalo F. Iriarte
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2019)
Article
Chemistry, Analytical
Miguel Sinusia Lozano, Laura Fernandez-Garcia, David Lopez-Romero, Oliver A. Williams, Gonzalo F. Iriarte
Summary: This study developed high-performance SAW resonators and filters based on Sc0.43Al0.57N material, with high electromechanical coupling coefficients and stability, showing potential application prospects in the development of 5G technology.
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)