Materials Literature
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Fundamental properties of plasmon modes propagating along graphene nanoribbons are investigated by means of a Method-of-Moments approach together with a dyadic description of a nonlocal graphene conductivity. Modal propagation, field distributions, and characteristic impedances are studied in details showing the drama…
The oxidation of Ti3Al0.7Si0.3C2 carbide at 1100 and 1200°C in air for up to 50 h resulted in the formation of rutile-TiO2, α-Al2O3 and SiO2. Depending on the location of the carbide, either thin, dense, single layered oxide scales or thick, porous, bi-layered oxide scales formed. The single layered scales consisted p…
In order to get homogeneously dispersed carbon nanotubes suspension for composite plating, carbon nanotubes were ball milled for different times and polycyclic acid (PA) was used as dispersant in this work. Sedimentation ratio was calculated by measuring the absorbance of suspensions and friction coefficient of the co…
Multilayer nanogranular film structures (CoFeB)m(SiO2)100-mhave been investigated by ferromagnetic resonance (FMR). It is shown experimentally that for these films which magnetic phase content is below percolation threshold the variation of FMR fields is not related to the thickness of magnetic layers but can be expla…
We studied a strategy for developing reproducible and stable 2D arrays of fractal micrometric gold nanoparticles arranged on silicon substrates. The combined use of electron beam lithography and molecular functionalization allowed us to finely control the shape of nanoparticle assemblies in designed areas. Atomic forc…
The Green polyurethane adhesive system was prepared using two types palm oil polyol having different molecular weight ~1100 (GA) and ~ 2200 (GB) respectively, 4-4-diphenylmethane diisocyanate (MDI) and nanoclay fillers via in-situ process. Adhesives were applied on both sides of two untreated wood substrate using brus…
In recent years there has been renewed interest in zinc oxide semiconductor, mainly triggered by its prospects in optoelectronic applications. Doping ZnO with various elements has been a popular technique to gain the extrinsic properties for device applications. In this work we have studied the effect of Gadolinium (G…
GaN nanorods have been formed by inductive coupled plasma (ICP) etching in BCl3/Cl2plasma. Nanostructures were formed only in the initially titanium masked area, wherein the dimensions of mask pattern do not define dimensions of nanorods, but the region of structure formation only. It has been found that density of na…
In order to develop environmentally friendly conductive polymer composites, polylactic acid (PLA) was melt blended with natural rubber (NR), with addition of carbon black (CB) as the conductive filler. It was found that the PLA/NR blends were immiscible, and the sea-island and co-continuous morphological structures we…
Though, fuel cells and hydrogen technology is known to the scientific community for almost two centuries, in recent years, there has been a renewed interest due to global efforts to develop and use clean and efficient energy conversion technologies for sustainable development. Thus, this chapter presents an educative…
DFT method was used to calculate the equilibrium geometries, electron structures and first-hyperpolarizabilities of grafted SWCNT (4,4) by organic chromophore stilbene at B3LYP/6-31G* level. ZINDO method was also used to calculate first-and second-hyperpolarizabilities. The calculated results show that stilbene grafti…
Different samples of pseudoboehmite were synthesized through the sol-gel process, using aluminum nitrate as precursor. The influence of variables on the product of the synthesis of pseudoboehmite was studied. The variables were the ageing temperature (25 and 130°C), addition or not of polyvinyl alcohol to the precurso…
Single Sensor Differential Thermal Analysis (SS-DTA) is a novel non-destructive testing technique for studying and detecting the phase transformations and structural changes in materials. It uses only one temperature sensor to measure the temperature in a particular point of interest in the material during actual and…
We have developed a single-flux-quantum (SFQ) read only memory (ROM) cell. The developed SFQ ROM cell has compatibility with an existing cell library. It comprises splitters and confluence buffers. For large integration, we have merged two 1-bit cells into one cell with peripheral elements, and we have optimized circu…
Ferromagnetic (FM) FeCo is investigated in exchange bias systems. The ferromagnetic layer is grown on a FeMn antiferromagnetic (AFM) layer. Partial superficial oxidation of FeCo is observed. The standard field cooling procedure results in a large room temperature exchange bias effect. However, the training effect obse…
The demands of smart devices such as smart phones or tablet PCs has risen dramatically over the last decades. Also the display technology has been continuously evolved into higher resolution technology such as ultra high definition (UHD) resulting in more I/O pins required. Therefore, ultra fine pitch packaging and in…
We successfully demonstrate the facile fabrication of composite polymer/gold nanofibres using the electrospinning technique and show their physical characterization. Scanning Electron Microscopy (SEM) revealed the consistent structural fabrication of uniform nanofibres, and high-resolution Scanning Transmission Electr…
In this study, a three-dimensional (3D) copper-based metal-organic framework (MOF-199) is a microporous materials with structural formula Cu3(BTC)2 (1,3,5-benzene tricarboxylate) were successfully synthesized using nonsurfactant templating method. The preparations of MOF-199 utilized different length of straight carbo…
Ceramic freeze cast preforms based on alumina show an anisotropic behavior due to directional freezing during preform production. Beside the specific characteristics such as alumina content and lamellae spacing also the distribution of the so-called domains – regions with a relatively homogeneous orientation of alumin…
Conformal metasurfaces are even more diffused in different fields from optics to electromagnetics. Advanced applications, as making object invisible to incident fields also known as cloaking, require high precision realizations, since the resonant answer of the system is very sensitive to geometry details. Practical r…