Article
Chemistry, Inorganic & Nuclear
Vivian Xu, Bedraj Pandey, J. P. I. Dulmini Jayawardhena, Jeanette A. Krause, Hairong Guan
Summary: This work focuses on nickel complexes derived from two tetrahydrosalen-type proligands. The reaction of H(2)salophan with Ni(OAc)(2)& BULL;4H(2)O generates a dinuclear complex Ni-2(Hsalophan)(2)(OAc)(2) or Na[Ni-2(salophan)(2)(OAc)]. On the other hand, the reaction of H(2)salophan_Me with Ni(OAc)(2)& BULL;4H(2)O yields a mononuclear complex Ni(Hsalophan_Me)(2). These tetrahydrosalen-type complexes are paramagnetic and air sensitive in solution. They can be oxidized to form the salen-type complexes through dehydrogenation of the ligand backbone by O-2 or peroxides.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Yuke Jiao, Shengnan Li, Guoping Li, Yunjun Luo
Summary: In this study, F2311/Al/CuO (FMICs) nanocomposites were prepared using direct writing technology with soluble Viton F2311 as a binder. The effects of different mass fractions of F2311 on the thermal and combustion properties of FMICs were systematically studied. The results showed that as the F2311 content increases, the thermite reaction of FMICs is advanced and the system has a higher exothermic and combustion rate. Compared with other materials, F2311/nanothermites exhibits better processability and reaction properties and holds promising applications.
Article
Chemistry, Physical
Haneol Lee, Jong Hun Kim, P. R. Deshmukh, Hyung Soo Hyun, Youngku Sohn, Weon Gyu Shin
Summary: In this study, nickel nanoparticles were coated on the surface of boron particles using a spray drying technique, improving the combustion and ignition performance of boron. The nickel-coated boron particles showed advantages in ignition delay time and oxidation performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Coatings & Films
Hoang-Thien Luu, Selina Raumel, Folke Dencker, Marc Wurz, Nina Merkert
Summary: In this study, the nanoindentation process on aluminum surfaces covered with oxide layers of different thicknesses was examined using molecular dynamics models and experiments. The research findings showed that the oxide layer has a significant impact on defect emission in the substrate, but the behavior of the oxide layer during the indentation process differs for different potentials.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Kwanyoung Noh, Hyemin Kim, Siwook Nam, Soonho Song
Summary: This study investigates the thermophysical and combustion characteristics of ethanol-based nanofuels incorporating aluminum (Al) and nickel-coated aluminum (Ni-Al). The results reveal that nanofuels containing Al exhibit unburned Al residues after combustion, while nanofuels containing Ni-Al show intense AlO radical emission during combustion termination. However, nanofuels containing Ni-Al demonstrate a lower burning rate compared to Al nanofuels.
Article
Chemistry, Multidisciplinary
Yue Chu, Lei Wang, Pingan Liu, Penghua Sui
Summary: By coating the surface of Al nanoparticles (ANPs) with a nitrocellulose (NC)/ethanol/ether solution, a dense coating layer is formed to protect the ANPs through physical and chemical adsorption. This coating layer can prevent the contact between active Al atoms and O-2 molecules at low temperatures. During the ignition phase, the coating layer increases the density of O-2 molecules around the ANPs and the surface temperature, resulting in faster ignition and lower ignition temperature. The combustion stage can be divided into three stages based on atomic displacement: surface oxidation/core melting diffusion, combustion inward propagation, and uniform combustion.
Article
Chemistry, Physical
Dasol Lee, Myeongcheol Go, Soomin Son, Minkyung Kim, Trevon Badloe, Heon Lee, Jin Kon Kim, Junsuk Rho
Summary: An energy-free daytime radiative cooler based on silica-coated porous anodic aluminum oxide has been proposed, optimized, and experimentally realized. The final design, optimized using effective medium theory, exhibits high reflectance in the solar spectral region and a substantial average emissivity in the atmospheric window, achieving a maximum cooling effect of 6.1 degrees C below ambient temperature during the daytime. This approach is believed to be a promising way to produce inexpensive and efficient radiative coolers.
Article
Chemistry, Multidisciplinary
Lei Wang, Mengjun Wang, Pingan Liu, Junpeng Liu
Summary: Coating aluminum nanoparticles with ethanol and ether molecules can enhance their combustion performance, reducing ignition delay time and increasing combustion temperature, thus improving overall combustion efficiency of the system.
Article
Chemistry, Applied
Fumihiko Ohashi
Summary: Synthetic amorphous aluminum silicates-coated titanium dioxides (AS-T nanocomposites) were synthesized by a hydrothermal reaction. AS-T nanocomposites showed narrow particle size distributions and high hydrophilicity. They also exhibited much higher photodegradability than commercial titanium dioxide, making them potential fillers in paints.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Engineering, Chemical
Yaning Zhang, Rui Zhang, Luo Wu, Haiyan Liu, Zhichang Liu, Guoqing Cui, Chunming Xu, Xianghai Meng
Summary: This study demonstrates the potential application of bimetallic composite ionic liquids in catalysis research. The structural characteristics of the complexes were revealed by XAFS measurements and DFT calculations.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Mathematics, Applied
S. Dhar, N. Poddar, R. R. Kairi, B. S. Mazumder, K. K. Mondal
Summary: Wetlands are valuable to mankind due to their commanding influences on ecosystems and benefits to water supply, climate regulation, biodiversity conservation, and contaminant erosion. This study presents a numerical approach to detecting environmental dispersion of fine particles in wetland flows, illustrating the effects of various parameters on concentration profiles.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Chemistry, Physical
Mostafa Baloochi, Deepshikha Shekhawat, Sascha Sebastian Riegler, Sebastian Matthes, Marcus Glaser, Peter Schaaf, Jean Pierre Bergmann, Isabella Gallino, Joerg Pezoldt
Summary: A two-dimensional numerical model was developed to study the self-propagating reactions in Al/Ni multilayer foils, showing that increased thermal conductivity of the final product leads to higher reaction front velocity, the effect of heat convection losses on reaction characteristics is insignificant, and higher initial temperature of the foils results in increased reaction front velocity and temperature.
Article
Materials Science, Multidisciplinary
Yongpeng Chen, Jianguo Zhang, Jiawei Zhu, Ning Xiang, Huichao Zhang, Zunning Zhou
Summary: Nickel-coated aluminum powders with tunable nickel layer thickness were successfully synthesized. The dense core-shell structure of the Al@Ni particles with nickel layer thicknesses of 120, 160, 200, and 240 nm was confirmed. The maximum heat release of the Al@Ni particles reached 1308 +/- 6 J/g when the nickel layer thickness was 200 nm, indicating the potential of this approach for preparing reactive metallic composite particles.
Article
Materials Science, Multidisciplinary
Ignacio Cobo, Maria Biezma-Moraleda, Paul Linhardt
Summary: Nickel aluminum bronze (NAB) and manganese aluminum bronze (MAB) are highly alloyed bronzes that are increasingly used in various industrial sectors due to their excellent resistance against corrosion, cavitation, erosion, and improved mechanical properties compared to other copper-based alloys. This study investigates the effect of welding processes on the corrosion behavior of NAB and MAB, and finds that the major influence of welding processes is on the amount and distribution of the beta-phase, which is susceptible to selective corrosion.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2022)
Article
Energy & Fuels
Wei-Shiuan Tseng, Jheng-Siou Hung, Zheng-Yue Jian, Jian-Zhi Huang, Jin-Bin Yang, Wei-Hsuan Hsu, Chih- Wu, Xue Li Huang, Mei-Hsin Chen
Summary: Recent research has shown that nickel oxide (NiOx) thin films can be used as an efficient and stable hole transport layer (HTL) in inverted planar perovskite solar cells (PSCs), replacing costly and chemically unstable organic materials. In this study, annealing-free Al-doped NiOx nano-particles (NPs) were synthesized and applied as a HTL in PSCs, resulting in significant improvements in electrical conductivity, morphology, external quantum efficiency, and power conversion efficiency.
Article
Dentistry, Oral Surgery & Medicine
Min Kyeong Lee, Xianglan Zhang, Hyung Jun Kim, Young Sun Hwang
Summary: This study provides evidence that Prx5's role in removing excess ROS may contribute to cancer invasion and progression.
Editorial Material
Oncology
Hyounmin Kim, In-Ho Cha, Hyung Jun Kim, Woong Nam, Hyunwoo Yang, Sung-uk Cho, Yoon Woo Koh, Dongwook Kim
ANNALS OF SURGICAL ONCOLOGY
(2023)
Article
Oncology
Hyounmin Kim, In-ho Cha, Hyung Jun Kim, Woong Nam, Hyunwoo Yang, Sung-uk Cho, Yoon Woo Koh, Dongwook Kim
Summary: This study aimed to investigate the feasibility and availability of free-flap reconstruction via the retroauricular approach in patients with advanced-stage oral cancer. The results showed a higher success rate and slightly longer total operation time in the retroauricular group compared to the transcervical group.
ANNALS OF SURGICAL ONCOLOGY
(2023)
Editorial Material
Oncology
Hyounmin Kim, In-ho Cha, Hyung Jun Kim, Woong Nam, Hyunwoo Yang, Sung-uk Cho, Yoon Woo Koh, Dongwook Kim
ANNALS OF SURGICAL ONCOLOGY
(2023)
Article
Medicine, General & Internal
Hyounmin Kim, In-ho Cha, Hyung Jun Kim, Woong Nam, Hyunwoo Yang, Gibum Shin, Chena Lee, Dongwook Kim
Summary: This study suggests guidelines for predicting perforators of anterolateral thigh (ALT) free flaps using CTA imagery. The results show that CTA has a high positive predictive value and sensitivity for perforator detection. Although there may be some discrepancies between CTA and intraoperative findings in terms of the location of perforators, the addition of Doppler imaging can help improve accuracy.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Surgery
Seung-Woo Shin, Hyounmin Kim, Woong Nam, Hyung Jun Kim, In-Ho Cha, Yoon Woo Koh, Dongwook Kim
Summary: Although some surgeons prefer other methods, the radial forearm flap is still the most reliable option for soft tissue reconstruction in the head and neck area. To minimize donor site complications, the authors developed a new technique for harvesting the radial forearm flap using a robotic device. The study found no significant difference in flap outcome between the robot-assisted and conventional methods, but the robot-assisted method had a longer harvesting time.
JOURNAL OF ROBOTIC SURGERY
(2023)