Materials Literature
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We report on the interest of luminescent and nanosized metal atom clusters for the development of functional silica nanoparticles. Furthermore, multi-functional hybrid nanoparticles have been achieved by associating these luminescent clusters with magnetic γ-Fe2O3 nanocrystals and plasmonic gold nanocrystals. In addit…
Apatite containing-polymer beads have been prepared using two methods. The first series of scaffolds is obtained using an effortless procedure consisting in mixing the mineral phase in the polymer precursors, followed by crosslinking. The resulting materials contained agglomerates of inorganic particles. The second se…
Surface electromagnetic modes guided by thin metal layers are usually called surface plasmons SP. SP were originally discovered by Ritchie in the fifties of the twentieth century in the optical regime. Then, surface plasmons found many applications in different areas of science including terahertz and microwave device…
We report in-situ measurement of the conductivity during the synthesis of C 60 -filled single-walled carbon nanotubes (SWNTs), so-called fullerene peapods. The synthesis was performed in a sealed quartz tube at 773 K by using the sublimation of C 60 into the hollow space of the SWNTs. The change in the resistance in t…
The automotive components made of polymers are very sensitive to temperature variation, either during its application in the vehicle or in some stage of manufacture of the component. The automotive bumpers, made of polypropylene during the process of painting, undergo a heater. This process is harmless to metals used…
Ionic functionalization influences many of the key properties of conductive polymers through its impacts on molecular order, the injection and transport of charge, optical excitations, and interactions with other molecules. Consequently, it is an important tool in the development of electronic and photonic devices bas…
Highly pure transparent single-crystalline BaTi2O5, 6 mm in diameter and 15 mm in length, was prepared by a floating zone (FZ) method using high purity BaCO3as a source material. The as-prepared crystal was partially dark blue and became transparent by annealing at 773 K in air. The maximum value of permittivity (εmax…
Silicon-aluminum composites with Si content of 42-70 wt. % were fabricated by an innovative method of liquid-solid separation. The microstructures and thermal conductivity analyzing and predicting by the Maxwell and Hasselman-Johnson models were executed. The results show that silicon particles in composites are near…
In this paper we analyze, using the Finite Element Method, the process of brittle-ductile transition in the failure mode observed in polycarbonate notched specimens under impact loads. In order to analyze this transition we have implemented, through a user subroutine, a damage model which combines a tensional fracture…
Corrosion behaviors of Q235 steel in simulate ammonium sulfate solution were studied. Effects of the ammonium sulfate concentration, Cl- concentration, pH and the flow velocity on corrosion of Q235 steel in simulate ammonium sulfate solution were investigated by the weight-loss method, and the electrode processes were…
We report on the development of a previously demonstrated contacting scheme for Al contacts through a-Si to p-type silicon Point-contacting by Localised Dielectric Breakdown (PLDB) in a number of different metal-insulator-semiconductor structures. It is shown that PLDB works for different metals and dielectrics as wel…
Unquestionably, one of the most important developments in this century has been the avalanche advancement of Integrated Circuits technology incorporating solid state systems into areas never before imagined. Students face special challenges to understand these complex systems using conventional instructional methods.…
Production and processing of titanium alloys are expensive and its alloys show low wear resistance. Substrates of Ti-40Zr, used for orthopedic implants, were obtained from the elemental mixture of hydrogenated powders, followed by a sequence of cold uniaxial and isostatic pressing and vacuum sintering. Aiming wear res…
In this work, the permeability of high performance composite coating (HPCC) and its containing layers fusion bonded epoxy (FBE) and middle density polyethylene (MDPE) to dissolved CO2 was investigated. The obtained results showed that the permeability to dissolved CO2 of HPCC, FBE, and MDPE are in order of HPCC -11 mo…
Zinc oxide (ZnO) thin films were prepared by sol-gel spin coating technique, which were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), NKD thin film analysis system and fluorescence spectrophotometer. The results show that ZnO thin films with the each layer thickness of 80 nm present obv…
In preset study, the sol-gel method was used to deposit ZnO films and silicon substrates were used as substrate. The effects of deposition temperature on the structural and morphological properties of ZnO films were investigated. X-ray diffraction (XRD) measurement showed that the ZnO films were crystallized in the he…
Silicon nanowire-based biosensors have been identified as a promising biosensing technology. However, it suffers from the interface signal process to be applied into applications. In this paper, we utilize a readout circuit to directly transfer the signal obtained from a Si nanowire based sensing device into digital f…
Passive Intermodulation (PIM) occurring in worldwide broadcast systems has only received a very small amount of attention. This paper will focus on how and where PIM occurs in broadcast systems. Known PIM sources occurring in broadcast equipment are reviewed. PIM interference examples are provided for an ATSC DTV tran…
Sm2Co17:Cu,Crfilms growing on Cr buffer layer and Cu seed layer were prepared by pulsed laser deposition(PLD) methodbased on Si(100) substrate. The results showed that Cu and Cr co-doped in SmCo films made the refinement of crystal grain and the increase of coercivity of SmCo. Beside, the experiments found that the in…
Abstract Process optimization for increasing the response speed of liquid crystal optical rewritable e‐paper was investigated. It is demonstrated that by filling LC in atmosphere condition rewriting time could be decreased to 6 seconds with good repeatability. Increasing the spin coating speed and time could also decr…