Low electrical resistivity of a graphene–AgNHPs based ink with a new processing method
AgNHPs was purified with membrane separation-centrifugation cleaning and syntheses the GE–AgNHPs with the low resistivity (2.5 × 10 −6 Ω cm) at low temperatures.
Materials Literature
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Study on Performance of Silicon Ignitiors based on Energetic Chip of Porous Silicon
In order to study the igniton properties of the silicon ignitior, firing sensitivity test with output charge B-KNO3 were carried out, and the igniton properties was studied as well. The result indicates that the energetic chip can ignite B-KNO3 which burns sufficiently. The 50% firing voltage was 21.3V, standard devia…
Theoretical analysis of electrochromism under redox of bis(3-thienyl)/(2-thienyl)hexafluorocyclopentene: effects of charged and substituted systems
Electrochromism with the ring-closing or ring-opening isomerization of substituted and unsubstituted bis(3-thienyl)/(2-thienyl)hexafluorocyclopentene is discussed using the DFT method. In the neutral ground state, bond making and breaking between two reactive C atoms on thienyls are thermodynamically forbidden. Under…
Effect of medium solvents on crystalline degree and specific surface area of Cu3BiS3 nanoparticles synthesised by biomolecule-assisted hydrothermal and solvothermal methods
Cu3BiS3 nanoparticles were successfully synthesised by hydrothermal and solvothermal methods using L-cysteine biomolecules as a sulphur source and complexing agent. Phase and purity of the samples were characterised by X-ray diffraction (XRD) and selected area electron diffraction (SAED). Scanning and transmission ele…
The Study of Relationship between Fracture Angles of Natural Fiber with Its Micro Fibril Angle
The natural fibers are used in engineering purpose to make fabrics, ropes, bags etc. They are also used in making hybrid composites and natural composites. The strength of composite depends on the strength of natural fibers. The fracture behaviour of natural fibers is important to study so that the desired composite l…
Evaluación y selección de un inhibidor multiscale para prevenir la formación de incrustaciones inorgánicas en un campo petrolero colombiano
Formation damage produced by inorganic scaling is the most frequently and has the major impact on the Colombian oil fields. It causes important economic losses due to flow restrictions, workover operations and production losses. Therefore it is necessary the implementation of inhibition techniques to prevent scaling.…
The Gradient Discretization Method for Optimal Control Problems, with Superconvergence for Nonconforming Finite Elements and Mixed-Hybrid Mimetic Finite Differences
In this paper, optimal control problems governed by diffusion equations with Dirichlet and Neumann boundary conditions are investigated in the framework of the gradient discretization method. Gradient schemes are defined for the optimality system of the control problem. Error estimates for state, adjoint, and control…
Corner Modelling Strategy for Finite Element Impact Simulation of Extruded Square Thin–Walled Column
This paper deals with the numerical modelling strategy for square thin–walled column subjected to axial impact loading. The behavior of the column was found to be affected by the way the column is manufactured, i.e. formed metal sheet or extruded. For formed metal sheet structure a comparison between numerical simulat…
Positron annihilation study of cavities in black Au films
Defects in a black Au film were studied using variable energy positron annihilation spectroscopy. Black Au films exhibit porous morphology similar to cauliflower. This type of structure enhances the optical absorption due to a multiple reflections in the micro-cavities. A nanostructured black Au film was compared with…
Effects of variation of chitosan concentration on the characteristics of membrane cellulose bacteria-chitosan biocomposites as candidates for artificial dura mater
This study was conducted to determine the effect of variation in concentration of chitosan on the physical and biological characteristics of the membrane of bacterial cellulose-chitosan biocomposites through immersion precipitation method. Bacterial cellulose membrane was soaked in a solution of chitosan whose concent…
Effect of melt-spun powder additions on the thermoelectric properties of bismuth and antimony chalcogenides
We have studied the thermoelectric properties of p -type Bi 0.5 Sb 1.5 Te 3 and n -type Bi 2 Te 2.4 Se 0.6 solid solutions prepared by vacuum hot pressing of mixtures of powders differing in particle size composition. The powders were prepared by mechanically grinding ingots and by ultrarapid melt cooling (melt spinni…
Why do we “feel” atoms in nano-scale friction?
Atomic stick-slip patterns are readily observed in experiments. The traditional description of atomic-scale friction in terms of mechanical stick-slip instabilities (the Prandtl−Tomlinson model) appears so successful, that it obscures the actual mechanisms of energy dissipation. Here, we show that the conventional mod…
Leak Detection on Water Distribution Networks Using Helium Gas
Water loss problems become main issues for most water operators in in around the globe.Locating invisible atau undetected leakages under the ground is not a simple task for the water operators.The emergence of undetected leakages cause severe deficits for the water operators and inadequate services for the customers.T…
Preparation and characterization of Ni-doped carbon aerogel for supercapacitor
Ni-doped carbon aerogel was prepared by impregnation methods, physical structure, and electrochemical properties were investigated. Electrochemical properties of prepared Ni-doped carbon aerogel and carbon aerogel electrodes were measured by galvanostatic charge/discharge measurements. The results show Ni-doped carbon…
Effect of co doping to the optical properties of ZnO:Co Thin films deposited on glass substrate by sol-gel spray coating technique
This study aims are to analyze the effect of cobalt doping concentration to the optical properties ZnO:Co thin films deposited by using sol-gel spray coating technique. Deposition of ZnO and ZnO:Co thin films has been successfully formed on a glass substrate using sol-gel method of spray coating technique with a varia…
Aggregation Prevention Assay for Chaperone Activity of Proteins Using Spectroflurometry
) from the unfolded state (U) to the folded state (N). Under heat shock conditions, this process is reversed.
Low power fluorine plasma effects on electrical reliability of AlGaN/GaN high electron mobility transistor
Low power fluorine plasma effects on electrical reliability of AlGaN/GaN high electron mobility transistor* , Yang, Ling, Zhou, Xiao-Wei, Ma, Xiao-Hua, Lv, Ling, Cao, Yan-Rong, Zhang, Jin-Cheng, Hao, Yue
LaGa-based bulk metallic glasses
We report the formation of LaGa-based bulk metallic glasses. Ternary La–Ga–Cu glassy rods of 2–3 mm in diameter can be easily formed in a wide composition range by the conventional copper mold casting method. With minor addition of extra elements such as Co, Ni, Fe, Nb, Y, and Zr, the critical diameter of the full gla…
Multiscale structures and phase transitions in metallic glasses: A scattering perspective
Amorphous materials are ubiquitous and widely used in human society, yet their structures are far from being fully understood. Metallic glasses, a new class of amorphous materials, have attracted a great deal of interests due to their exceptional properties. In recent years, our understanding of metallic glasses incre…
Tailoring the alignment of string-like nanoparticle assemblies in a functionalized polymer matrix via steady shear
This work reports the steady shear induced aligning behaviour of nanoparticle strings in a functionalized polymer matrix.