Materials Literature
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Based on the wettability alteration caused by the modified hydrophobic solid surface, the phenomenon of wettability alteration is simulated numerically in terms of linear and instantaneous modification by using the lattice Boltzmann method which can properly reflect the interaction of solid-liquid molecules, combined…
The two-, three- and four-body interaction energies in face-centered cubic (fcc) krypton are evaluated using the many-body expansion method and the coupled cluster theory with full single and double excitations plus perturbative treatment of triples, and both self-consistent-field (SCF) Hartree-Fock energy and correla…
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In the scope of this thesis, the synthesis of polymethacrylate based capillary monoliths was performed via block copolymerization by using a new hydrophilic monomer with reactive chloropropyl moiety, 3-chloro-2-hydroxypropyl methacrylate (HPMA-Cl). These columns were successfully tried in the electrochromatographic se…
Hot phosphor acid (H3 PO4) etching and/or SiOxNy surface passivation are used to change the surface states of high-resistance intrinsic GaN films. The films are investigated to reveal the influence of controlled surface states on photoluminescence (PL) emission. It is found that H3 PO4 etching cannot improve the ultra…
Based on the Rayleigh-Sommerfeld diffraction integral theory, the propagation analytical expression of double-half Gaussian hollow beams in turbulent atmosphere is derived by using the cross spectral density function, and the effects of turbulent medium refractive index structure constant Cn2 on the propagation charac…
GaN-based light-emitting diode (LED) thin films grown on Si(111) substrates are successfully detached and transferred to copper and silicon submounts, and then become 40mil high power vertical structure LED chips. Electroluminescence properties of the two kinds of chips with the same expitaxial structure are investiga…
The work provides theoretical foundation for determining the conditional viscosity of paint and varnish materials as well as other Newton liquids without time-factor accounted. Conditional viscosity determined with the technique proposed depends on the amount of liquid forced out into the measuring capillary of a visc…
The two-mode phase field crystal (PFC) method is used to calculate the phase diagram. And in this paper it is used to simulate the effects of predeformation degree and isothermal temperature on the hexagonal grain boundary evolution and on the hexagonal/square phase transition. Results show that when there is no prede…
Based on the fact that Bragg reflection grating (BRG) is a special case of one-dimensional photonic crystal, we may apply the one-dimensional photonic crystal band gap theory to design the BRG. OptiFDTD is used to simulate both the width error and tilt angle error in BRG. It turns out that the diffraction efficiency w…
Size-dependent exciton spin relaxation dynamics in CdTe colloidal quantum dots is studied at room temperature with the cross-polarized heterodyne third-order nonlinear transient grating technique The CdTe exciton spin relaxation reveals a mono-exponential decay behavior with a time constant of 0.1-0.5 ps when the pump…
The kinetics and mechanism of the formation of silver nanoparticles (AgNPs) by reduction with ribose and glucose were studied spectrophotometrically under pseudo-first-order condition in aqueous micellar media over 45 – 60 oC and variety of [OH-] range. The rate of reaction increases with increasing of the [OH-]. Cety…
Nowadays, the studies on band gap and absorption spectrum of TiO2 doped with Pr lead to opposite conclusions. Two experimental results about red-shift and blue-shift are reported in the literature. We have set up models for pure TiO2 and different doping concentrations of Pr-doped TiO2 to calculate the electronic stru…
Recently, nanomaterials obtained from biomass have gained attention due to their function and sustainability. Among bio-nanomaterials, cellulose nanowhisker (CNW) is one of the most potential materials for reinforcement of bioplastics due to its superior mechanical properties, biodegradability, and high aspect ratio.…
The proposed method of multicriteria optimum design of load-lifting winches is based on the Pareto principle which allows for the design possessing minimum capital and operational expenditures through implementing the necessary requirements.
ИССЛЕДОВАНИЕ ПОВРЕЖДЕНИЙ НА МЕТАЛЛИЧЕСКИХ ПРЕГРАДАХ, ОБРАЗОВАННЫХ ПРИ ВЫСТРЕЛАХ ИЗ ОГНЕСТРЕЛЬНОГО ОРУЖИЯ ОГРАНИЧЕННОГО ПОРАЖЕНИЯ
The current study discusses the structure, mechanical and transport properties of polyethylene-based materials into two parts. The first part deals with the migration and chemical depletion of active substance such as insecticides from moulded polyethylene sheets. Deltamethrin (DM) and synergist piperonyl butoxide (PB…
Background In recent years, much attention is paid to the protection of oil and gas pipelines from internal corrosion. One of the solution is to use the steel pipes with an inner polymeric protective coating and their fireless make up technology. This article provides a calculation of strength substantiation of mechan…
Spherical silver (Ag) nanoparticles, triangular Ag nanoprisms, and triangular gold (Au) nanoparticles were separately deposited on the Eu(TTFA)3-doped Su8 films. Compared with the fluorescence of films without nanoparticles, the fluorescence of the doped films was greatly enhanced by the two kinds of the Ag nanopartic…
In recent years, Er3+ doped CdF2-CdCl2-NaF-BaF2-BaCl2-ZnF2 (CNBZN) glass has become one of the new materials in the field of laser cooling of solids. In this paper, using the theory of laser output and standing wave resonance, intracavity-and extracavity-enhanced laser cooling of Er3+-doped CNBZN glass are theoretical…