Materials Literature
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In this paper, we present a systematic experimental study of effective optical linear refractive index and third-order optical nonlinear effective susceptibility of nano-porous silicon samples with various values of silicon volume fill fractions. The experimental results are in good agreement with the theoretical pred…
Various types of methods for the synthesis of metal nanoparticles have been actively researched to obtain functional nanomaterials such as catalysts and sensors. In this study, sonochemical reduction methods for the synthesis of metal nanoparticles were investigated in aqueous solutions. The rates of sonochemical redu…
Copolymers of ω-pentadecalactone (PDL) with ε-caprolactone, valerolactone, dioxanone and trimethylenecarbonate synthesized by biocatalysis show rather uncommon crystallization behavior, namely cocrystallization of the monomer units that leads to highly crystalline copolymers over the whole composition range. Hydrophil…
Electroplated Cu films are known to change their microstructure at room temperature due to the self-annealing effect. This recrystallization process results in a film-thickness-dependent stress evolution. Films with the thickness of 5μm and below decrease in stress with time, while thicker films reveal initially an in…
Copper powder dispersed poly-methyl methacrylic acid (acrylic resin, PMMA) composites (PMMA-Cu) were prepared by the solution cast method. The Cu addition at the critical volume fraction (15.0±1.0 vol%Cu) drastically enhanced the electric conductivity from the insulator (10−14 Sm−1) to the electric conductor (105 Sm−1…
An equilibrium study of Bacillus atrophaeus ( B.a ) spores on functionalized Single-Wall Carbon Nanotubes (SWCNTs) has been performed in order to characterize the adsorption properties of the spores/nanotubes complex. The carbon nanotubes here investigated were subjected to a two-step purification and functionalizatio…
The employment of shape-memory alloys (SMA) in a large number of applications in many fields of engineering, among which biomedical engineering, has been the motivation for an increasing interest in the direction of a correct and exhaustive modelling of their macroscopic behaviour in order to construct reliable simula…
We demonstrated experimentally and theoretically the principle to control the discotic morphology of particles with a layered internal structure. The packing of surfactants tailored the curvature and set the shape of the elastic membrane produced as the surface of the emulsions crystallized via surface freezing. Using…
Clay, in regard to its origin is unique. The kaolin of the mine of Ajebo has a hydrothermal geological formation. It presents itself a fragile and crumbly material, of whitish colour. Therefore, the objective of this paper was to evaluate the clay mineral of Ajebo deposit, its microstructure using scanning electron mi…
The specific surface area (SSA) of natural particles is an important parameter to quantify surface processes such as dissolution and adsorption. In this study, the SSA of illite and montmorillonite particles was determined by N 2 gas adsorption (BET), the EGME method and atomic force microscopy (AFM). By AFM it was po…
The near infrared (NIR) spectra of bis(ethylene-1,2-dithiolato)nickel, Ni(C(2)S(2)H(2))(2) are fully interpreted here by applying a method developed for efficient automatic computation of both the infrared wave numbers and the intensities. The employed procedure uses parallel variational multiple window configuration…
Fundamental surface rolling experiments were carried out using rollers of 1.5Cr-0.2Mo alloyed sintered steel having the density of 7.00∼7.55 g/cm3. A high precision CNC form rolling machine of 2-roller dies transverse type was employed. Pore distributions and endurance limits in rolling contact fatigue were investigat…
Magnetism and ferroelectricity at room temperature are observed in the NiBi 2 O 4 ceramics. Both the time reversal and the inversion symmetry of the structure (space group F-43m) are broken. The saturation magnetization is 0.028 emu/g and the saturation polarization 2 P s ∼4.0 μ C /cm 2 . NiBi 2 O 4 also shows other r…
In today's nanoelectronics devices, thermal management is a major issue to miniaturization. Because of its high thermal conductivity, diamond is an extremely interesting material for heat spreading. SOI (Silicon-On-Insulator) technology suffers of the poor thermal dissipation due to the silicon oxide buried layer. Thu…
The samples of the (Ca0.5GdU0.5)Zr2O7 and (Ca0.5GdU0.5)(ZrTi)O7 ceramics with the fluorite and pyrochlore structures used as matrixes for the long-lived high-level radioactive waste disposal were studied with the X-ray photoelectron spectroscopy method. On the basis of the X-ray photoelectron spectroscopy parameters o…
Manganese doped ZnO nanoparticles were synthesized by mechanochemical processing in a high energy ball mill (Zn1−xMnxO, x = 0, 0.02, 0.04, 0.06, 0.08, 0.1). ZnO nano particles were synthesized by milling corresponding chemical precursors in a planetary ball mill for different periods of time. Diluents were used to con…
The present study is focused on the detailed characterization of (ZnO) 1−x (CuO) x (Al 2 O 3 ) 0.002 bulk samples and their thin films. XRD of bulk samples showed ZnO peaks without impurity phase which indicates maximum substitution of copper inside the ZnO lattice. Raman spectra showed a random shift of modes which m…
Abstract Aberration correction in the scanning transmission electron microscope allows spatial resolutions of the order of one Ångström to be routinely achieved. When combined with electron energy loss spectroscopy, it is possible to simultaneously map the structure, the chemistry and even the electronic properties of…
This paper is concerned with the convective Cahn–Hilliard equation. We use a classical theorem on existence of a global attractor to derive that the convective Cahn–Hilliard equation possesses a global attractor on some subset of $H^2$.
The present study deals with some results on mechanical and thermal transport properties of PMMA/PC and PMMA/PS polymer blends prepared by solution casting method at concentrations (0, 25, 50, 75, 100 wt%). Dynamic mechanical Analyser (DMA) and Transient Plane Source (TPS) technique have been used to measure the mecha…