Article
Physics, Applied
Dung Van Hoang, Anh Tuan Thanh Pham, Truong Huu Nguyen, Hoa Thi Lai, Dai Cao Truong, Thu Bao Nguyen Le, Thuy Dieu Thi Ung, Masataka Ohtani, Vinh Cao Tran, Thang Bach Phan
Summary: This study investigates the control of microstructure orientation through material thickness variation to tailor the thermopower factor of CuCr0.85Mg0.15O2 films. The results demonstrate that in thicker films, the dominant (110)-preferred orientation and presence of copper vacancies increase the conductivity. Despite the significant increase in conductivity, the Seebeck coefficient remains unchanged within a wide range of film thickness. Consequently, the thermopower factor of CuCr0.85Mg0.15O2 films drastically increases with increasing film thickness, with the 2.0 μm-thick film reaching a value of 720 μW/mK(2) at 500°C, which outperforms bulk materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Kyle S. Nicholson, Vladimir Skripnyuk, Chunjie Xu, Xiang Gao, Eugen Rabkin, Peter D. Hodgson, Rimma Lapovok
Summary: A series of Mg-Y-Zn alloys with different LPSO phase fractions were prepared and their hydrogen absorption/desorption properties were experimentally assessed. The results showed that the kinetics of hydrogen absorption and desorption scaled with the LPSO phase volume fraction, though not in a linear manner. Changes in the LPSO phase fraction and alloy content did not affect the thermodynamics of hydrogenation. Furthermore, the decomposition of LPSO structures into Mg phase, lamellar Mg/Mg-Zn structures, and YH2 particles was observed during hydrogen absorption experiments.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
S. Pacanowski, M. Wachowiak, B. Jablonski, B. Szymanski, L. Smardz
Summary: The study prepared Pd/Mg bilayers and Pd/Al/Mg trilayers on glass substrates at room temperature using UHV magnetron sputtering. Mixing effects at different interfaces and hydrogen absorption behaviors were investigated by XPS. The results showed that the presence of an appropriate thickness of aluminum layer can significantly improve hydrogen absorption kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Tyler M. Brown, Hassan H. Fakih, Daniel Saliba, Jathavan Asohan, Hanadi F. Sleiman
Summary: A barrier for biological applications of DNA structures is their instability to nucleases. This study explores the use of UV-mediated thymine dimerization to crosslink and stabilize DNA nanostructures. The researchers compare different methods of DNA irradiation and show that all approaches can achieve nuclease protection, but with varying levels of off-target crosslinking and damage. They also demonstrate a mild irradiation condition that enhances serum stability while maintaining DNA function. This methodology has potential applications in nucleic acid therapy and nanotechnology.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Quanhui Hou, Jiaqi Zhang, Zhu'An Zheng, Xinglin Yang, Zhao Ding
Summary: The Ni3Fe/BC nanocatalysts prepared in this study can effectively improve the hydrogen storage performance of MgH2. The composite exhibits a lower onset temperature of hydrogen release, lower hydrogen absorption temperature, and higher hydrogen absorption and desorption rates compared to pure MgH2. It also demonstrates good cycling stability.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Kailu Xiao, Pengfei Zhang, Dongmei Hu, Chenguang Huang, Xianqian Wu
Summary: This paper reports the highest specific energy absorption (SEA) of interlocked micron-thickness carbon nanotube (IMCNT) films subjected to micro-ballistic impact. The SEA of the IMCNT films ranges from 0.8 to 1.6 MJ kg(-1), which is the greatest value for micron-thickness films to date. Multiple deformation-induced dissipation channels at the nanoscale contribute to the ultra-high SEA of the IMCNT.
Article
Materials Science, Multidisciplinary
Yuan Yin, Bing-Hui Luo, Zhen-Hai Bai, Hui-Bo Jing
Summary: The quench sensitivity of Al-Cu-Mg alloy was examined at different thicknesses of the thick plate. A finite element analysis was used to simulate the quenching process, and the resulting time-temperature-property and time-temperature-transformation curves were obtained through hardness tests and differential scanning calorimetry. Microstructural observation was conducted using scanning electron microscopy and transmission electron microscopy. The experimental results showed that the quench cooling rate decreases from the surface to the center of the plate, leading to inhomogeneous microstructure and a decrease in S-phase and an increase in T-phase, which was consistent with the analysis of the time-temperature-property and time-temperature-transformation curves.
Article
Chemistry, Physical
G. N. Churilov, N. S. Nikolaev, V. Elesina, G. A. Glushenko, V. G. Isakova, Ye Tomashevich
Summary: In this study, the change in properties of powders with a core-shell structure (magnesium-carbon and magnesium-carbon/palladium) during the process of hydrogenation/dehydrogenation was investigated. It was found that the decrease in hydrogen sorption capacity was mainly due to the formation of MgO and Mg(OH)2 phases, which hindered the diffusion of hydrogen. The carbon shell provided more complete hydrogenation, while the additional palladium shell increased resistance and lowered the temperature of hydrogenation/dehydrogenation processes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Weichen Luo, Ling Qian, Weiwei Liu, Xin Zhang, Qi Wang, Haiyang Jiang, Beijiu Cheng, Huan Ma, Zhengyan Wu
Summary: The Mg-enriched biochar fertilizer (MBF) demonstrated excellent slow-release performances of total P and N, with mechanisms involving Mg-P precipitates and 'P-trap' effect of MgO for P-release, as well as confinement effect and electrostatic attraction for N-release. MBF significantly promoted corn growth and enhanced nutrient uptake efficiency, suggesting promising potential for sustainable agriculture with multiple environmental benefits.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Shaopeng Liu, Yucheng Liu, Tongqing Yang
Summary: In this study, Ph0.98La0.02(Zr0.55Sn0.45-xTix)(0.995)O-3 (x = 0.02-0.08) (PLZST) antiferroelectric thick films were fabricated using a rolling process, showing the potential for high energy-density storage. It was found that by varying the Ti content at the B site, the dielectric parameters could be easily tailored, with 2 mol% Ti reaching the best recoverable energy density of 5.7 J/cm(3). This work suggests that finding dielectric materials with high switching field could provide solutions for high energy-storage applications with low electric fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Marla V. V. Satya Aditya, Srikanta Panda, Sankara Sarma Tatiparti
Summary: Hydrogen uptake behavior in ball milled Mg-B-erGO nanocomposites was studied at different B/C ratios, revealing the impact of charge donation, reception, and interactions on the crystal structure and kinetics of hydrogen absorption. Atomic interactions play a crucial role in reducing incubation time and enhancing hydrogen uptake kinetics in these nanocomposites.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Zia Ur Rehman, Mohsan Nawaz, Hameed Ullah, Imad Uddin, Masroor Ahmed Bangesh, Qudrat Ullah Khan
Summary: In this study, magnesium nanoparticles (MgNPs) and Mg@Ni core-shell nanoparticles were synthesized for the first time using microemulsion technique. The Ni shell significantly reduced the desorption temperature of the MgNPs. The SEM and TEM observations confirmed the homogeneous distribution of the synthesized nanostructures and core-shell materials. PCT results showed that Mg@Ni core-shell nanoparticles absorbed more hydrogen compared to pure MgNPs. The hydrogen storage properties of Mg@Ni core-shell nanoparticles were excellent due to the nano size effect.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Lirong Sun, John G. Jones, John T. Grant, Neil R. Murphy, Jonathan P. Vernon, Peter R. Stevenson
Summary: Thin-metal films with ultrathin thicknesses (<10 nm) face challenges in processing due to poor wetting at dielectric interfaces. The co-sputtering of nanocomposite metal-dielectric films offers a solution by achieving film coalescence and adjustable optical properties. This study demonstrates the manipulation of structural and optical properties of nanocomposite Ag-SiO2 films, which can be utilized in the design of high-precision multilayer optical filters.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Xuancheng Wang, Xuezhang Xiao, Jiaguang Zheng, Zhouming Hang, Wenping Lin, Zhendong Yao, Meng Zhang, Lixin Chen
Summary: The study shows that ball-milling magnesium borohydride with titanium nano-particles results in enhanced hydrogen release, improved dehydrogenation kinetics, and lower activation energy. The catalyzed magnesium borohydride also exhibits high reversibility during partial dehydrogenation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Amir Hossein Asadi, Parastoo Mahmoud Kalayeh, Hamed Mirzadeh, Mehdi Malekan, Massoud Emamy
Summary: In this study, the microstructures, mechanical properties during tensile deformation, and precipitation kinetics of Mg95.5Y3Zn1.5 and Mg95.5Y3Ni1.5 magnesium alloys were compared. The investigation revealed that the peak aging treatment led to the formation of lamellar 14H-LPSO phase in Mg95.5Y3Zn1.5 alloy and bMODIFIER LETTER PRIME-Mg7Y particles in Mg95.5Y3Ni1.5 alloy, resulting in improved ultimate tensile strength and total elongation. The analysis of formation kinetics indicated that the activation energy for phase transformation was different for the two alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
