Article
Chemistry, Physical
T. I. Milenov, I. A. Avramova, A. Dikovska, D. Karaivanova, P. Terziyska, S. K. Kolev, D. Karashanova, B. Georgieva, D. Dimov, V. Atanasov, E. P. Valcheva
Summary: The study found that UV-C irradiation had a significant impact on the structural quality of a-C:H and ta-C:H films, reducing the content of sp(3) and oxygen-containing radicals. The influence of UV-C light directed almost parallel to the films' surface on the structural quality of graphene-like films was slightly higher than that directed perpendicular.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Keliang Wang, Hui Zhou, Kaifeng Zhang, Binhua Gui, Xingguo Feng, Shengzhu Cao, Yanshuai Zhang, Bingwen Teng
Summary: In this study, tetrahedral amorphous carbon (ta-C) films with bias-regulated Ti interlayers were prepared, and their microstructure, mechanical, and adhesion properties were systematically investigated. Molecular dynamics simulation was also used to study the formation of Ti films. The results showed that the bias voltage on the Ti interlayer had minor influence on the sp(3)C fraction and mechanical properties of ta-C films. Molecular dynamics simulations further supported the experimental results.
Article
Green & Sustainable Science & Technology
Lu Tuo, Peng-Yu Zhu, Wan-Li Song, Di Ouyang, Cheng Zhang, Lin Liu
Summary: Metallic glasses (MGs) catalysts have shown promise in Fenton-like reactions for environmental remediation. A novel three-dimensional amorphous-nanocrystalline catalyst on Cu-foam, fabricated using thermal spraying, demonstrates excellent catalytic activity-recyclability synergy. This method enables large-scale production of a 3D porous MG composite without the need of posttreatment. The architected 3DP MGC exhibits exceptional electro-Fenton activity, surpassing the performance of most Fe-based catalysts reported to date, with a kinetic rate constant 1.4 times higher than that of the amorphous FeSiB MG ribbon. Furthermore, the 3DP MGC catalyst demonstrates excellent reusability, maintaining efficiency for over 60 cycles without decay.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Cyril Tlou Selepe, Sandile Surprise Gwebu, Thabo Matthews, Tebogo Abigail Mashola, Ludwe Luther Sikeyi, Memory Zikhali, Nobanathi Wendy Maxakato
Summary: Carbon nano-onions (CNOs) were successfully synthesized using flame pyrolysis, with Pd-Sn/CNOs electro-catalysts showing improved performance in methanol and ethanol electro-oxidation under alkaline conditions. The characterization techniques confirmed the structure and properties of the materials, with PdSn alloy formation on the CNO surface contributing to the enhanced catalytic activity.
Article
Chemistry, Physical
Lin Xiao, Ju Gao, Xintong Yao, Xinyu Dong, Fangyun Yang, Jinhua Wang, Zhenduo Cui, Chao Li, Shengli Zhu
Summary: This study successfully prepared an OER catalyst (np-Fe40Co40B20-800-5min) enriched with nanocrystalline using vacuum annealing and electrochemical dealloying methods. The catalyst exhibited excellent OER performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Liu, Xingwei Liu, Jin Cao, Xinya Feng, Shukui Li, Jinxu Liu
Summary: An amorphous interlayer was introduced between Mo and Cu phases in Mo-Cu alloys using the high-temperature infiltration method. The thickening of the amorphous interlayer significantly improved the interfacial bonding, leading to an increase in the tensile strength and failure strain of the Mo-Cu alloy.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Du Sun, Qingyuan Bi, Mingxia Deng, Bingquan Jia, Fuqiang Huang
Summary: This study demonstrates a method for optimizing the conversion and selectivity of noble metal-based catalysts in the semi-hydrogenation reaction by dispersing Pd and Ru in an amorphous zirconium hydrogen phosphate matrix. The highly diluted noble metals can act as dual single-atom sites in oxides, with both conversion and selectivity exceeding 90%. In situ DRIFT-IR results show the rapid generation of surface hydroxyl groups, indicating the high efficiency of the single-atom sites in dissociating bound H-2. This work provides a scalable approach for producing cost-effective single-atom catalysts extendable to various oxide matrices.
CHEMICAL COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Qinghai Tan, Abdullah Rasmita, Si Li, Sheng Liu, Zumeng Huang, Qihua Xiong, Shengyuan A. Yang, K. S. Novoselov, Wei-bo Gao
Summary: By engineering multilayer heterostructures, photoluminescence can be recovered and the properties of generated interlayer excitons, including lifetime, valley polarization, and valley lifetime, can be substantially improved compared to monolayer-monolayer heterostructures.
Article
Materials Science, Ceramics
Julie Simeon, Florent Lebreton, Laure Ramond, Philippe Martin, Doris Drouan, Catherine Sabathier, Guillaume Bernard-Granger
Summary: The microstructure of a 98.7% dense U0.856Pu0.144O1.993 sintered sample has been characterized by electron probe microanalysis, Raman spectroscopy, and transmission electron microscopy. Results from Raman spectroscopy and electron probe microanalysis are comparable in studying the spatial distribution of plutonium in a homogeneous sintered MOX fuel. Transmission electron microscopy provides additional characterizations for investigating the chemical homogeneity of sintered MOX fuels, revealing variations in the Pu/(U+Pu) content at the scale of elementary grains.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Esam Bahaidra, Najeeb Al-Khalli, Mahmoud Hezam, Mohammad Alduraibi, Bouraoui Ilahi, Nacer Debbar, Mohamed Abdel-Rahman
Summary: This paper is an extension of the latest study, aiming to obtain better tin (Sn) concentrations for microbolometer applications. Amorphous germanium-tin (Ge1-xSnx) thin films with different Sn concentrations were fabricated using sputter-deposition. The elemental composition and surface morphology of each film were evaluated, and the sheet resistance versus temperature measurements were performed and analyzed to derive empirical relationships. Microbolometer prototypes were fabricated using electron-beam lithography and the noise behavior, maximum detected signal, and other performance parameters were measured.
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2023)
Article
Materials Science, Multidisciplinary
Mehdi Rouhani, Jonathan Hobley, Hsin-Hung Ou, Jian-Ting Lee, Sai Bhavani Sravan Metla, Yeau-Ren Jeng
Summary: This study demonstrates the successful formation of environmentally friendly amorphous carbon tribofilms on steel surfaces using vegetable oils, and establishes the mechanism of formation. The technology not only eliminates the use of toxic additives, but also outperforms conventional mineral-oil-based formulations in terms of performance.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Physical
Miao Ren, Xueyan Zhang, Yunqing Liu, Guang Yang, Lang Qin, Jiaqi Meng, Yihang Guo, Yuxin Yang
Summary: In this study, a palladium-single-atom-coordinated cyano-group-rich g-C3N4 (Pd/D-N-UCN) was synthesized to improve the photocatalytic hydrogen evolution activity. The formation mechanism of Pd single atoms on g-C3N4 nanosheets and the coordination bonding of cyano groups with Pd atoms were proposed. The synthesized 0.16%Pd/D-N-UCN exhibited enhanced photocatalytic hydrogen production activity compared to electrostatically stabilized Pd single atoms.
Article
Engineering, Electrical & Electronic
Angela Elisa Crespi, Charles Ballage, Marie-Christine Hugon, Jacques Robert, Tiberiu Minea
Summary: Depositing ultrathin amorphous nanocrystalline carbon (a-C) layers on flexible copper foils is an alternative way to reduce reflectance, critically reducing Cu reflectance by interference and losses. Specific a-C films can achieve up to an 80% reduction in reflectance, suitable for applications such as laser absorption.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Tianxing Wu, Hanqi Meng, Rui Dang
Summary: This study proposes a simple method to synthesize amorphous Ru-Ta2O5 composite materials with excellent hydrogenation performance under a constant potential of -1.1 V vs. RHE, achieving a high conversion rate of 69.8% for cinnamaldehyde.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Engineering, Electrical & Electronic
Brijlata Sharma, Rajesh Lalwani, Ruby Das
Summary: High quality nanocrystalline CdS thin films with different Cu doping concentrations were successfully fabricated on glass slides using the sol-gel spin-coating technique. The Cu doping was found to significantly impact the structural, optical, and electrical properties of the films, as evidenced by XRD, Raman spectra, UV-visible spectroscopy, photoluminescence, and photoconductivity studies. The results showed that Cu doping led to a decrease in crystallite size, an increase in optical band gap, and enhanced luminescence intensity in the CdS thin films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
