Materials Literature
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The electronic states of a “quantum dot-graphene monolayer-SiO2 + n +-Si substrate” system in an external magnetic field are studied. An analytical expression for charge transfer in this system is obtained. The electronic states of a “quantum dot-graphene bilayer-SiO2 + n +-Si substrate” system are considered. The sys…
Abstract An unexpected phenomenon named as critical effect of polymer bumps in PS‐VA LCD was found and studied. It shows that only if the bumps amount reaches sufficient high they can reduce the LCD optical rising time. It suggests a safe RM content value in LC mixtures when producing PS‐VA LCD.
Polycarboxylate-type superplasticizers (PCs) with different carboxylic group content and the same degree of polymerization are synthesized. Their microstructures are studied by fluorescent probe technique, dynamic light scattering (DLS) and transmission electron microscopy (TEM). The method of fluorescence probe confi…
In this work gate bias cycled operation (GBCO) is used on a gas-sensitive SiC field effect transistor (“GasFET”) to increase the sensitivity and selectivity. Gate bias ramps introduce strong hysteresis in the sensor signal. The shape of this hysteresis is shown to be an appropriate feature both for the discrimination…
An electron beam lithography (EBL) system, CABL-UH, with a 130 kV high acceleration voltage has been developed that succeeded in minimizing beam size by minimizing Coulomb blur. This system has a short single-stage electron beam (EB) gun with an alignment function of two extractor centers to minimize Coulomb blur. Thi…
The study involves synthesis of polypropylene grafted with glycidyl methacrylate (PP-g-GMA) using three different initiators, benzoyl peroxide, dicumyl peroxide and tertiary butyl cumyl peroxide (TBSP). Among the peroxides used, dicumyl peroxide resulted in considerable reduction of molecular weight of the resulting g…
Nanodielectrics show remarkable dielectric properties like dielectric breakdown strength, or both surprisingly low and high values for the relative permittivity. These changes compared to materials filled with conventional, microscale filler are often attributed to the high surface area of nanoparticles and their aspe…
Microstructure and mechanical properties of a new developed cold work die steel (SDC99) were investigated under solution treatment and comparison with Cr12MoV steel. The new developed high strength and high toughness cold work die steel has overcome the weakness of Cr12MoV which failed with tipping, fracture and colla…
Abstract In this work, an LCD mode with vertical alignment and in‐plane switching electrodes (VA‐IPS) is proposed to improve optical performance. This mode can control tilt angles of LC molecules via combinations of various distances of the in‐plane‐switching electrodes, and thus improve color washout. Also, a new dri…
We designed a mechanism and the accompanying sample holders to transfer between a VEECO 930 oxide molecular beam epitaxy (MBE) and a PHI Versa Probe X-ray photoemission spectroscopy (XPS) chamber within a multiple station growth, processing, and analysis system through ultrahigh vacuum (UHV). The mechanism consists of…
As argilas bentoníticas, usadas como agente viscosificante e nanocompósitos, não podem ser usadas sem um prévio tratamento orgânico para que suas superfícies se tornem hidrofóbicas e possam ser dispersas em meios orgânicos. Estas argilas depois de tratadas são chamadas de argilas organofílicas, e são geralmente obtida…
Based on conventional thermal pulse method, a space charge measuring system that can be used with applied voltage is presented in this study. Compared to the traditional thermal method for space charge and polarization profiles measurement, the thermal pulse method with applied voltage brings the advantages of easy ca…
The performance of electro-electrets (dielectric elastomers) for actuator and sensor applications relies on high relative permittivity and low elastic modulus. Recent advances in the chemical modification of silicone elastomers allow for the stable attachment of molecular dipoles to the elastomer network, which leads…
To improve the way of efficient recycling of waste Tetra Pak package, save wood materials and develope new packaging materials, this article studied on the optimum hot-pressing process and surface decoration of waste Tetra Pak/sawdust composite board. Using the orthogonal experimental method, we studied the effect of…
A strategy to obtain functional tissues engineering with desired biomechanical properties was used to develop scaffolds with morphologies mimicking the native environment to guide tissue regeneration. Non-woven scaffolds, with fibre dimensions at a nanometre scale, can mimic the physical structure of natural extracell…
Abstract Molecular metal complexes with interactions between localized spins and conduction electrons are expected to show interesting electronic and magnetic properties. We prepared magnetic molecular conductors of iron complexes with extended TTF ligands and investigated their crystal structures and electronic and m…
The diamond nanowires (DNW) films have been deposited by N2-based microwave plasma enhanced chemical vapor deposition. Hydrogen plasma treatment is carried out on these films for various treatment times which result in microstructural and chemical modification. Morphology of as-grown DNW films resemble symmetry of den…
Abstract This paper provides evidence of appreciable amounts of Zn (up to 0.52 a.p.f.u.) residing in the crystal structure of trioctahedral vermiculite; the results were obtained by a combination of experimental methods (X-ray diffraction, energy dispersive X-ray spectrometry, electron microprobe analysis and selectiv…
The adsorption behaviors of radioactive strontium and silver nuclides on the graphite surface in a high-temperature gas-cooled reactor are studied by first-principles theory using generalized gradient approximation (GGA) and local density approximation (LDA) pseudo-potentials. It turns out that Sr prefers to be absorb…
Duplex stainless steel (DSS) presents a good combination of mechanical properties and high corrosion resistance. Its microstructure is composed of two phases with different physical properties: delta ferrite and gamma austenite. The best properties of DSS for in service applications are achieved when these phases are…