Materials Literature
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A modified continuum model of electro-statically actuated micro-beam is presented based on the modified couple stress theory. The new model contains a material length scale parameter and can capture the size effect, unlike the classical Bernoulli-Euler beam theory. The governing equation of the micro-beam is derived b…
This paper presents a current reference for read and verify operations in multilevel phase-change memories (PCMs). The circuit is able to track the temperature behaviour of the PCM cell current over a temperature range from -40°C to 80°C, as is necessary to meet the stringent requirements of multilevel PCM sensing. Th…
Cu/graphene contact is the key interface for graphene- based devices. In the paper, first-principle calculations are used to investigate the detailed interface atomic and electronic structures and Mulliken charge populations of monolayer, bilayer, trilayer grapheme/Cu (111) interface. The Fermi level is pining by the…
Both Er -doped Si -rich silicon nitride ( Er : Si 3(1+x) N 4 ) films and electroluminescence (EL) devices with structure of indium tin oxide/ Er : Si 3(1+x) N 4 / p-Si with varying Si and Er contents have been fabricated by reactive magnetron sputtering technique. We have investigated the effects of the excess Si cont…
Abstract Magnesium-based alloys as biodegradable orthopedic implants have been successful for their high degradation rates in the physiological environment and the consequent loss in the mechanical integrity. Casting method used in production of magnesium-based alloys influences the microstructure of implants due to c…
Structural characteristics of third- and fourth-generation dendrimers and irregular hyperbranched polymers of various topologies equal to regular dendrimers in terms of molecular mass in solutions of various topologies are studied via Brownian dynamics simulation. Terminal and inner groups of the studied molecules fea…
Foam dyeing and finishing is a novel approach for textile processing, which can save energy and reduce the quantity of waster water. Frother plays an important role in foam dyeing and finishing systems. In this paper, the foaming properties of SDS were investigated for the purpose of application of foaming systems in…
The use of natural plant fibers as reinforcing fillers in fiber-polymer composites has drawn much interest in recent years. Natural plant fibers as reinforcing fillers have several advantages over inorganic fillers such as glass fibers; they are abundant, readily available, renewable, inexpensive, biodegradable, of lo…
The work described in this paper focuses on the impact of thermal aging on NO<sub><i>x<i/><sub/> trap structure and functions. They were evaluated on a Synthetic Gas Bench (SGB) and correlated with the analysis of the structural and chemical evolution of the catalyst. A FTIR Operando study allowed to further analyse t…
The synthesis of AGE modified polysiloxane was realized by block copolymerization. Using degradation method and different ratio of raw materials, different content of AGE side chains and molecular weight of AGE modified polysiloxanes had been obtained. AGE modified silicone rubber was prepared by Nano-SiO 2 and AGE-Mo…
Composite materials and technologies group Gurit AG has sired an automotive company to focus on developing and producing carbon fibre reinforced plastic body panels for prestige cars. George Marsh reports.
This paper describes a preliminary investigation on the use of ramie fibre/ phenol formaldehyde (PF) composite to reinforce laminated veneer lumber (LVL). This research was conducted in two phases. Phase 1 the ramie fibre was treated with KH-550 silane coupling agent. Phase 2 different numbers of sheets ramie fibre/PF…
The potential for using probe-based phase-change memories for the future archival storage at densities of around 1 Tbit/in. 2 is investigated using a recording medium comprising a Si/TiN/DLC/GeSbTe/diamond-like carbon (DLC) stack together with a conductive PtSi tip for writing and reading. Both experimental and comput…
A novel 2D organic-inorganic hybrid 3 d –4 f polyoxometalate [Cu(Dap) 2 (H 2 O)][Cu(Dap) 2 ] 4.5 [Gd(α-PW 11 O 39 ) 2 ] · 5H 2 O ( I ) (Dap = 1,2-diaminopropane) built by [Gd(α-PW 11 O 39 ) 2 ] 11− units and [Cu(Dap) 2 ] 2+ bridges has been synthesized hydrothermally by the reaction of GdCl 3 , CuCl 2 · 2H 2 O, Na 9 […
The relation “composition - structure - NLO property” is observed for a set of >;200 acentric borate crystals. The distribution of the crystals over point groups is very inhomogeneous with domination of C2vpoint group crystals. Acentric borates are distributed on the plane of the shortest chemical bond lengths metal-o…
The morphology, particle-size distribution, and luminescence properties of β-NaCaPO 4 :Eu 2+ were examined in relation to the synthesis conditions by electron-microscopic, X-ray phase, and luminescence analyses. The distribution of the Eu ions over the metal sites in the β-NaCaPO 4 structure was analyzed.
The synthesis by thermal decomposition of rare earth doped yttrium oxide nanoparticles was investigated. The elements of the rare earth were europium, which showed strong fluorescence, and erbium, which indicated upconversion properties. Metal-oleate complex was used as a precursor. The results of Scherrer’s equation…
We present 13 C high-resolution magic-angle-turning (MAT) and magic angle spinning nuclear magnetic resonance data of Cs and Rb intercalated single walled carbon nanotubes. We find two distinct phases at different intercalation levels. A simple charge transfer is applicable at low intercalation level. The new phase at…
We report the synthesis of composite nanoparticles by an integrated CVS/CVD process at atmospheric pressure. Iron oxide and silica support particles were generated by chemical vapour synthesis (CVS), using Fe(CO)5 and Si(OC2H5)4 and were directly coated in the aerosol state with molybdenum oxide by chemical vapour dep…
The synthesis of multi-walled carbon nanotubes MWCNTs, carbon nanoshells, carbon nanoonions (CNOs), different types of carbon nanostructures and CaCO3 nanoparticles were performed using an arc-discharge method in mineral water. The structures of the synthesized nanostructures were visualized by scanning electron micro…