Article
Chemistry, Physical
Cong Xiong, Yong Xiao, Jian Zhang, Dan Luo, Russell Goodall
Summary: The study investigates the use of Ni-Cu/SAC composite solders with different Cu contents as interlayers for soldering Al alloy joints. The microstructure formation and evolution are found to be influenced by the Cu contents. Different initial phases and phase transitions are observed in Ni18Cu/SAC and Ni38Cu/SAC joints. The shear strength of the joints initially increases and then decreases with soldering time, with the Ni18Cu/SAC joints soldered for 10 minutes exhibiting the highest shear strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Andre M. Delhaise, Zohreh Bagheri, Stephan Meschter, Polina Snugovsky, Jeff Kennedy
Summary: This study examines whisker formation on SOT components assembled with SAC-Bi alloys under different storage conditions, finding that SAC305 tends to grow longer whiskers, while SAC-Bi alloys have more densely packed whiskers. The Particle Stimulated Nucleation (PSN) mechanism of recrystallization of the beta-Sn matrix, influenced by Bi precipitation, appears to affect the mechanism for whisker growth.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Yulong Li, Xiang Deng, Min Lei, Xuewen Li, Hua Ouyang
Summary: By heat treating the nickel-plated copper substrate, the adhesion between the substrate and plated coating can be enhanced, and the growth of interfacial intermetallic compound can be inhibited, thus improving the performance of reflow solder joints.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Aimi Noorliyana Hashim, Mohd Arif Anuar Mohd Salleh, Andrei Victor Sandu, Muhammad Mahyiddin Ramli, Khor Chu Yee, Noor Zaimah Mohd Mokhtar, Jitrin Chaiprapa
Summary: The presence of Ni alters the microstructure of Cu6Sn5 to form a (Cu, Ni)6Sn5 intermetallic layer, suppressing the growth of tin whisker and extending the incubation period.
Article
Multidisciplinary Sciences
Nadir Boni, Lawrence Shapiro, Barry Honig, Yinghao Wu, Rotem Rubinstein
Summary: Crystal structures of various cell-cell adhesion receptors show the formation of linear molecular zippers made up of proteins. Clustered protocadherins serve as an example of this phenomenon, using it to code vertebrate neurons. Simulations reveal that the formation of long zippers is an inherent feature of protocadherin structure, driven by both intracellular and intercellular interactions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Martynas Gavutis, Eric Schulze-Niemand, Hung-Hsun Lee, Bo Liedberg, Matthias Stein, Ramunas Valiokas
Summary: This study combines computational and experimental methods to investigate the fusion of small unilamellar vesicles (SUVs) on mixed self-assembled monolayers (SAMs) with different deuterated tether moieties. Initially, tethered bilayer lipid membrane (tBLM) formation was studied on SAMs with controlled tether surface densities using quartz crystal microbalance with dissipation monitoring (QCM-D). Molecular dynamics simulations were then used to understand the interaction mechanisms between the SUVs and different phases formed by the deuterated tethers. Real-time kinetics were recorded using QCM-D under different osmotic conditions to determine lipid mass accumulation and fusion process. The study reveals the key factors for SUV fusion and tBLM formation on the surfaces, and shows the advantages of the sparsely tethered tBLM system in studying various biophysical phenomena.
Article
Chemistry, Multidisciplinary
Krishnendu Das, Haridas Kar, Rui Chen, Ilaria Fortunati, Camilla Ferrante, Paolo Scrimin, Luca Gabrielli, Leonard J. Prins
Summary: This article describes a self-assembly of surfactant-based structures that rely on a combination of a thermodynamically controlled and a dissipative pathway for their formation. Adenosine triphosphate (ATP) acts as a high-affinity template and triggers the formation of assemblies at low surfactant concentrations. The presence of these assemblies allows for the activation of a dissipative self-assembly process by a weak-affinity substrate. The induced recruitment of additional surfactants by the substrate leads to the spontaneous formation of catalytic hotspots in the ATP-stabilized assemblies, resulting in substrate cleavage. Catalysis can be observed at a surfactant concentration where low catalytic activity is observed in the absence of ATP.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Chengjie Lu, Yushuang Liu, Jian Fang, Yan Zhang, Peigen Zhang, ZhengMing Sun
Summary: In this study, the extrusion of whiskers from MAX phases was investigated using a combination of experiment and simulation methods. It was found that the extruded whiskers are composed of atoms from both excess elements and lattice atoms, with the extrusion process accompanying the substitution of excess elements for lattice atoms. The driving force behind this process is believed to be the chemical potential gradient or reduced formation enthalpy.
Review
Chemistry, Multidisciplinary
Pengfei Xu, Liang Gao, Chunhua Cai, Jiaping Lin, Liquan Wang, Xiaohui Tian
Summary: This article reviews recent advances in the formation and function of polymeric nanotoroids, emphasizes the significant role of theoretical simulations in revealing the formation mechanism and inherent structure of toroidal assemblies, and discusses the challenges in this research field.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Hanaa Adsi, Shon A. Levkovich, Elvira Haimov, Topaz Kreiser, Massimiliano Meli, Hamutal Engel, Luba Simhaev, Shai Karidi-Heller, Giorgio Colombo, Ehud Gazit, Dana Laor Bar-Yosef
Summary: This study reveals the inhibitory effect of chemical chaperones on metabolite amyloid formation, expanding their functional repertoire and providing insights into their ability to reduce toxicity and cellular amyloid content.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Yi Xu, Yongli Xu
Summary: This study investigated the effect of calcium sulfate whiskers and calcium carbonate whiskers on the road performance of asphalt mixtures. It was found that the addition of calcium sulfate whiskers significantly improved the road performance, while the effect of calcium carbonate whiskers was not as significant.
Article
Biology
Fernando R. Balestra, Andres Dominguez-Calvo, Benita Wolf, Coralie Busso, Alizee Buff, Tessa Averink, Marita Lipsanen-Nyman, Pablo Huertas, Rosa M. Rios, Pierre Gonczy
Summary: The research suggests that TRIM37 may prevent the formation of Cenpas by regulating the stability and solubility of Centrobin, thus maintaining genome integrity.
Article
Chemistry, Physical
Khozima Hamasha, Mohammad M. Hamasha, Sa'd Hamasha
Summary: The impact of thermal aging time and temperature on the microstructure and mechanical properties of 96.5Sn-3.0Ag-0.5Cu (SAC305) was investigated. It was found that a layer of Cu6Sn5 was formed over the copper pad with increasing thermal aging time, and both the ultimate shear strength and total shear strength decreased.
Review
Engineering, Aerospace
Zekun Wang, Shiming Wang
Summary: This study analyzes the growth phenomenon, influencing factors, formation process, and evolution mechanism of metal whiskers in extreme service environments, aiming to improve the reliability of aerospace systems. The spontaneous growth and evolution mechanism of metal whiskers have always been scientific problems, with unclear theories and mechanisms. Metal whiskers are accelerated in extreme environments and pose a severe threat to equipment and devices.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Materials Science, Multidisciplinary
Pan Yi, Dihao Chen, Menglin Li, Zhen Yang, Zhenggang Fang, Juan Mo, Kui Xiao, Chaofang Dong
Summary: This study investigated the influence of Nd on the corrosion behavior of a SAC305 alloy. The addition of Nd reduced the undercooling in the solidification process to 1.5-2.5 degrees Celsius. The corrosion resistance of the solder was significantly improved with Nd addition, evidenced by the decrease in potential difference between IMCs and Sn, the increase in passivation film thickness, and the greater proportion of SnO2 in the corrosion product layer in the pseudopassivation region. Specifically, the addition of 0.05 wt% Nd showed the most pronounced improvement effects.
