100 Result(s)
within
Zhigang **
Characterization and Evaluation of Materials
Nanotechnology
-
Article
Hydrogen Induced Defects at Silicon Surfaces and Buried Epitaxial Misfit Dislocation Interfaces
A silicon epitaxial structure containing spatially confined arrays of misfit dislocations has been used in order to investigate the interaction between hydrogen and individual extended defects. Hydrogen was in...
-
Article
Kinetics of Ordering in Cu3Au: An Atomistic Approach
We study the kinetics of ordering in Cu3Au using a model Hamiltonian derived from the effective medium theory of chemical bonding. Monte Carlo simulations are used to investigate universal and non-universal featu...
-
Article
Crystal Defects In GaN on (0001) Sapphire
Defect structures in GaN thin films grown on (0001) sapphire have been studied using a combination of different transmission electron microscopy (TEM) techniques. Two fundamentally different types of defects a...
-
Article
A dual composite of WC-Co
Hardness, fracture toughness, and wear resistance are strongly inter-related properties of cemented tungsten carbide. Higher hardness usually dictates higher wear resistance but at the cost of fracture toughne...
-
Article
Defects in GaN Pyramids Grown on Si(111) Substrates by Selective Lateral Overgrowth
Selective lateral growth of GaN is a promising technique for producing high quality material for microelectronic and optoelectronic devices. Single-crystal GaN/AlN layers have been grown on Si(111) substrates ...
-
Article
Nucleation And Growth of Yttria-Stabilized Zirconia Thin Films Using Combustion Chemical Vapor Deposition
Liquid fuel combustion chemical vapor deposition technique was successfully used for YSZ thin film processing. The nucleation rates were obtained for the samples processed at different temperatures and total-m...
-
Article
An Inverter Woven from Flat Component Fibers for e-Textile Applications
In the most fundamental approach, e-Textile circuits will be made by weaving component fibers into circuits. The weaving pattern will determine the circuit function. A key requirement of such e-Textile circuit...
-
Article
Super-elastic Gold Conductors on Elastomeric Substrates
3-D displays, sensor skins, mechatronic structures, and e-textiles will rely on deformable and stretchable electronic circuits. It is likely that such circuits will be made of rigid semiconductor islands inter...
-
Article
A Method for Making Elastic Metal Interconnects
Stretchable, elastic metal interconnects are a key to the fabrication of 3-D conformal circuits and electrotextiles. The basic concept for reversibly stretchable, elastic metallization is a corrugated stripe o...
-
Article
Pulsed Laser Deposition Parameter Optimization for Growth of Alumina (Al2O3) Thin Film on Silicon (100)
Pulsed laser deposition (PLD) technique was used to grow alumina (Al2O3) thin films on (100) silicon substrate under different deposition conditions. The relationship between Al2O3 thin film thickness, hardness, ...
-
Article
Quantitative characterization of microstructures of liquid-phase-sintered two-phase materials
Many powder metallurgy materials have a common microstructure character—spherical or equiaxed particles embedded in a matrix. This article presents an analytical approach that establishes relationships between...
-
Article
Fabrication of Nanoporous Silica Nanospheres and Nanotubes by Inorganic and Organic Double Templates
Inorganic and organic double templates were used to fabricate silica nanospheres and nanotubes with nanochannels perpendicular to the shells. Sphere and needle like CaCO3 nanoparticles, synthesized by a high grav...
-
Article
Exploration of Electrophoretic Deposition of YSZ Electrolyte for Solid Oxide Fuel Cells
The suspensions of yttria stabilized zirconia (YSZ) were prepared in pure acetylacetone and ethanol and their mixtures. In all of the suspensions, YSZ thin films were obtained using electrophoretic deposition ...
-
Article
Prediction of properties of Al2O3-C refractory based on microstructure by an improved generalized self-consistent scheme
An improved generalized self-consistent scheme (GSCS), which has a simplified computation process, was proposed to predict the properties, based on microstructure, of multiphase materials. The results of the p...
-
Article
How Stretchable Can We Make Thin Metal Films?
Thin metal films deposited on elastomeric substrates can remain electrically conducting at tensile strains up to ~∼00%. We recently used finite-element simulation to explore the rupture process of a metal film...
-
Article
An analysis of grain boundaries and grain growth in cemented tungsten carbide using orientation imaging microscopy
Tungsten carbide grains are usually prism-shaped triangular platelets in cemented tungsten carbide materials, owing to the highly anisotropic nature of tungsten carbide grains. The misorientation distribution ...
-
Article
Suspension of Silver Oxide Nanoparticles in Chitosan Solution and its Antibacterial Activity in Cotton Fabrics
New stable silver oxide suspension in chitosan solution was prepared from a mixture of silver nitrate and chitosan in dilute acetic acid as precursor, in which the complex interactions between silver ion and c...
-
Article
Microstructural analysis of lead-free solder alloys
Among the many issues related to the performance of lead-free solder alloys, the dependence of their mechanical properties on the microstructure and the stability of the microstructure stability are some of th...
-
Article
Quasi-Plastic Deformation of WC-Co Composites Loaded with a Spherical Indenter
The quasi-plastic deformation behavior of cemented tungsten carbide (WC-Co) materials was studied using Hertzian indentation techniques. The indentation stress-strain curves of three WC-10 wt pct Co alloys wit...
-
Article
Iron catalyzed atom transfer radical polymerization of methyl methacrylate using diphenyl-2-pyridylphosphine as a ligand
The living radical polymerization of methyl methacrylate (MMA) by atom transfer radical polymerization, (ATRP) employing a Fe(II)X2/diphenyl-2-pyridyl phosphine (PyP) catalytic system (X = Cl, Br ), was investiga...
