Materials Literature
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Three-dimensional (3D) nanofabrication technologies are entering new phases in advanced application fields, such as nanorobotics, metamaterials, and nanomechanical systems. In particular, the ability to arbitrarily create 3D nanostructures in hard materials like semiconductors and metals with nanometer-scale resolutio…
The contact angle of three different reference liquids (i.e. distilled water, diiodomethane, and formamide) was measured by the sessile drop method by gently placing droplet onto the surface of the boron-compounds treated poplar veneer in this study. The permeability of the modified poplar veneer was evaluated. The su…
A thin film of silica aerogel has been spin coated on silicon wafers to investigate its super thermal insulating capability. The temperature of the thin film heaters fabricated on the aerogel coated wafer is measured at different applied powers. Simulations are performed to compare the aerogel coated wafers with the m…
Joining semiconductor chips at low temperatures (below 300 °C) by sintering nanosilver paste is emerging as an alternative, lead-free solution for power electronic packaging, especially high-temperature applications, because of high melting temperature of silver (961 °C). However, silver is susceptible to migration. I…
We explore the unipolar resistance switching effect in sandwich structures based on Nb, Ta and Zr oxide thin films. The structures were fabricated by pulsed laser deposition and low temperature anodic oxidation methods. After electroforming process memory cells demonstrate reproducible switching between low and high r…
Liposomes or lipid vesicles are self-closed structures formed by one or several concentric lipid bilayers with an aqueous phase inside, which may incorporate almost any molecule, namely proteins, hormones, enzymes, antibiotics, anticancer agents, antifungical agents, gene transfer agents, DNA, and whole viruses. Scien…
The structure and surface chemical properties of activated carbon after nitric acid modification and their influences on adsorption and catalytic ozonation of acid red 3R were investigated. The results showed that both specific surface area and micropore volume of activated carbon decreased, but mesopore volume increa…
Gel polymer electrolyte for dye sensitized solar cell application was synthesized from the hydrophilic polyacrylamide (PAM) grafted on natural rubber (NR) particles as flexible substrates at different monomer concentrations (40, 60, and 80% wt) in order to improve ionic conductivity. The seed emulsion polymerization o…
A study of the composition and structure of large single crystal inclusions formed inside cavities in pyroboroncarbon by means of energy dispersive X-ray microanalysis and electron diffraction analysis shows that they correspond to one phase of rhombohedral boron carbide. Bright-field images obtained by transmission e…
The state and stability of magnesium complexes with various azaporphyrins in the proton-donor media containing acetic acid have been studied. Kinetic parameters of the complexes dissociation have been determined, possible reactions mechanisms have been proposed.
Quantitative structure property relationships are systematically studied for glass transition temperature simulation of polyacrylate. A newly developed descriptor-generalized correlative index is used for the expression of chemical structure of polyacrylate. A multiple linear regression model is built after screening…
Thermal conductivity becomes an important material property measure in MEMS/NEMS applications. Recently, graphene has been proved to have superior thermal conductivity, which brought tremendous potential for nanoscale thermal transport management applications. In this study, we adopt the molecular dynamics simulation…
This paper described the influence of different ageing treatments on bending performance of carbonized bamboo scrimber according to three ageing standards (ASTM D1037, BS EN1087-1 and WCAMA). The modulus of elasticity (MOE) and modulus of rupture (MOR) were tested and the fracture morphology of the samples after mecha…
Redoxites poly(2,6-diphenyl-4-vinylpyran), poly(2,6-diphenyl-4-vinylpyrylium perchlorate), poly-(2,6-diphenyl-4-vinylpyridine) and poly(2,2′,6,6′-tetraphenyl-γ,γ′-dipyridine) were obtained based on pyrylium salts. Poly(2,2′,6,6′-tetraphenyl-γ,γ′-dipyridine) was transformed into the polyene to improve its film-forming…
The structural stability and the magnetocrystalline anisotropy (MCA) at MgO/Fe(001) interfaces with the incorporation of interfacial B atoms were investigated by using first-principles calculations. Total energy calculations predicted that the B atoms favored segregating to the interface. The calculated MCA energy for…
N, Fe co-doped TiO2 photocatalyst was synthesized by sol-gel method. The catalyst prepared was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Ultraviolet and visible spectroscopy (UV-vis). The results showed that the N, Fe co-doped TiO2 prepared had the anatase structure. The absorption…
The paper provides brief classification of wear types of tillage machines working tools. Also factors influencing abrasive wear process are determined in the case of cultivator shank of Kuzbass 8.5 seeding machine. Principles of development of wear-resistant materials and coatings are discussed.
The Fermi surface of PuIn 3 is investigated using flux-grown single crystals. Shubnikov-de Haas (SdH) oscillations were detected by means of the skin-depth measurement using a proximity-detector-oscillator circuit. Angular dependence of the SdH frequency which corresponds to the extremal cross-sectional area of Fermi…
Several plant leaf extracts (Pine, Persimmon, Ginkgo, Magnolia, Platanus, Cherry, etc.) were used and compared for their extracellular synthesis of nanomaterials. Stable gold, silver, copper, and platinum nanoparticles were formed by treating aqueous solution of HAuCl4, AgNO3, CuSO4·5H2O, and H2PtCl6·6H2O, respectivel…
In this study oxygen vacancy concentration on 3Y TZP ceramics was compared for sintered and aged samples in air and argon gas atmosphere. The sintering study was conducted over the temperature range 1250°C - 1500°C. Photoluminescence (PL) spectrums of the sintered samples were taken by laser with excitation wavelength…