Materials Literature
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The technology of producing open-end (OE) flax–cotton blended yarns with a 50%–100% content of flax fibers has been described. Flax fibers (noils) were modified in a process of enzymatic cottonization. Much shorter, thinner, and less stiff fibers were obtained. Laboratory tests proved that the greatest thinning and sh…
Attempts to develop new technologies of reduction of NOx emission are still carried out all around the world. However, most of them as literature survey suggests is focused on NOx emission control from power plants and mobile vehicles. Fewer investigations are conducted on the NOx emission abatement from the chemical…
Nanocomposite thin films composed of a TiO 2 matrix doped with noble metals nanoparticles (MNPS), Au and Ag, were deposited on Si (100) and glass substrates by dc magnetron sputtering. The samples were annealed in a protective atmosphere at temperatures ranging from 200 to 700 °C. The main goal of this work is to char…
A method has been proposed for calculating the two-dimensional Young’s modulus and the Poisson’s ratio for planar and nanotubular structures through the components of the two-dimensional elastic rigidity tensor obtained by numerical methods. The method has been tested for graphene and two-dimensional supracrystalline…
We have studied the temperature dependence of the characteristics of the resonant magnetoelectric (ME) interaction in the planar composite structure comprising a ferroelectric layer of lead magnesium niobate-lead titanate and a layer of nickel. It is established that an increase in the temperature in a 220–340 K inter…
High-performance epitaxial niobium-doped lead zirconate titanate thin films [Pb(ZrxTi1−x)0.98Nb0.02O3] with a fixed thickness were deposited on [111]-cut single-crystalline SrTiO3 substrates by a sol-gel process as a function of Zr/Ti ratio ranging from 20/80 to 80/20. An obvious shift of morphotropic phase boundary (…
Abstract In Severe Plastic Deformation (SPD) processes usually the whole material volume is subjected to the severe deformation. The generated fine‐grained structure is proposed to be uniformly distributed throughout the component. The resulting physical and mechanical properties have a comparatively even distribution…
Spinodal decomposition (SD) with different grain boundaries (GBs) is investigated on the atomic scale using the novel phase field crystal model. It is demonstrated that the decomposition process is initiated by precipitating one phase with a larger lattice constant in the tension region at the GBs and the other one wi…
〈001〉C Textured PMN-PT ceramics have electromechanical properties (d33 = 850–1050 pm/V, k33 = 0.79–0.83) between those of conventional PZT ceramics and relaxor PMN-PT crystals. In this work, we tailor crystallographic orientation in textured PMN-PT ceramics for transducer designs with non-planar poling surfaces. Speci…
Bacterial cellulose is a type of biopolymer produced by Acetobacter xylinum in high purity, high water holding capacity, good mechanical strength, elasticity and high crystallinity. In this research, pineapple waste is used as the carbon sources for the synthesis of bacterial cellulose. The objective of this study is…
Thermochromic printing inks change their colour regarding the change in temperature and they are one of the major groups of colour-changing inks. One of the most frequently used thermochromic material in printing inks are leuco dyes. The colour of thermochromic prints is dynamic, it is not just temperature-dependent,…
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
The catalytic oxidation of a representative volatile organic compound, benzene, with ozone at a low temperature was investigated. A nanoporous MCM-48 material with a high specific surface area was used as the support for the catalytic oxidation for the first time. Mn, which has high activity at a low temperature, was…
We evaluate the transport properties performance of armchair graphene nanoribbons (AGNRs) with a bio-molecule assembly as potential molecular-scale biosensors (Anthracene). The bio-molecules are assumed to be absorbed at the edge of an AGNR, and to behave as quasi-1D systems. The transport spectrum and density of stat…
Besides the plenty of applications of graphene allotropes in condensed matter and nanotechnology, we argue that graphene sheets might be engineered to support room temperature topological quantum processing of information. The argument is based on the possibility of modelling the monolayer graphene effective action by…
Aerosol-assisted chemical vapor deposition (AACVD), a method for producing single-walled carbon nanotubes (SWCNTs) with the use of ethanol and ferrocene as the sources of carbon and a catalyst introduced into a reactor by means of an ultrasound nebulizer, is described. The influence of different parameters such as tem…
ZnO is one of the multifunctional metal oxide semiconductors suitable for use in optoelectronic devices, as an alternative to tin oxide and indium oxide. Undoped ZnO films have been prepared using simple and cost-effective spray pyrolysis technique. In this work, we present detailed analysis of the structural, morphol…
Density graded polyethylene foams were produced using a chemical blowing agent and compression moulding. To control the local density inside the foams, the top and bottom plates of a compression moulding set-up were placed at different temperatures and moulding times in order to produce symmetric and asymmetric struct…
In this study, an ultrasonic motor for use at ultralow temperatures has been fabricated and evaluated. The motor has a bolt-clamped Langevin-type transducer using lead magnesium niobate–lead titanate (PMN–PT) single crystal. The transducer is proposed as an oscillator for use at ultralow temperatures by simulation of…
Hysteresis loops and energy products have been calculated reliably for a hard/soft/hard trilayer system with a deviation of easy axis β taken into account, which affects the coercivity significantly, and hence leads to much smaller energy products than those predicted by the previous theory. Such a deterioration is mu…