Materials Literature
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Electrodeposition of nanocrystalline CdTe thin films from an acidic sulfate aqueous electrolyte was performed using different potential values to study the effect of the electrodeposition potential and thermal and chemical treatments on the structure, morphology and optical properties of the resulting films. Electrode…
Defect formation energies, electronic structures and optical properties of Sn-doped β-Ga 2 O 3 , F-doped β-Ga 2 O 3 , and Sn/F co-doped β-Ga 2 O 3 were calculated using the first-principles. The calculated results of the pure and Sn-doped β-Ga 2 O 3 using the local-density approximation (LDA) method show that the latt…
Drop-coating deposition Raman (DCDR) spectroscopy is based on the measurement of a sample that has been preconcentrated by being dried on a special hydrophobic plate. In addition to its higher sensitivity, the advantage of DCDR over the conventional Raman spectroscopy is the small sample volume needed, the lack of int…
In this paper, the results of AC breakdown tests on epoxy - boron nitride nanocomposites are presented. Composites were produced with two different synthesis techniques and the same filler concentration. The main goal is to evaluate the reproducibility of the experimental results as it is one of the most important iss…
Quantum dots (QDs) have recently been investigated as fluorescent probes for detecting a very small number of biomolecules and live cells; however, the establishment of molecular imaging technology with on-off control of QD fluorescence remains to be established. Here we have achieved the fluorescence off state of QDs…
Development of rotary forcespinning (RF) to synthesize fibers has been done. High speed motor driven centrifugal force becomes a major factor in the formation of fibers. RF apparatus consists of three main parts namely the motor system, the collector, and the heating system that serves to regulate the temperature and…
We investigate the valley and spin-resolved transport through a ferromagnetic/ferromagnetic/ferromagnetic silicene junction. For the normal silicene junction with zero exchange field in the presence of photo-irradiation, we observe a 100% valley/spin polarization by modulating the energy E . By enhancing the strength…
Computer has been part of our daily life. In order to work properly and to avoid over heating which might damage the machine, it required a cooling system which effectively distribute heat from the electronic devices into surrounding environment. Generally, the cooling system only distributes the heat. The potential h…
Two-dimensional X‑ray diffraction data contain information about not only the type of mineral phases present in an assemblage, but also the textural or grain size relationships between minerals in a sample. For minerals within a certain grain size range, ~0.1 to 100 μm, the appearance and characteristics of a Debye ri…
Theoretical analysis for the volume (V) effect on electric breakdown strength (EBD) and the operating field (Eop) effect on lifetime (NL) of solid dielectrics on a nanosecond time scale is presented in the perspective of the Weibull distribution. It is derived that the general formula for the volume effect is EBD=kV-1…
In this paper, we propose a metamaterial-based terahertz (THz) absorber with optically tunable absorbance. The unit cell of the structure consists of a cross-shaped resonator, a dielectric spacing layer for wave impedance matching and a high-resistivity silicon (HRS) substrate. Without illumination, the structure acts…
The sound speeds are measured and the elastic and piezoelectric moduli are calculated for single crystal NdFe3(BO3)4 and SmFe3(BO3)4. These compounds are characterized by enhanced rigidity in the base plane with respect to stress-strain deformations and by a rather strong piezoelectric effect.
Multipass rolling of VT1-0 titanium at a temperature near that of liquid nitrogen to a strain e = −2 resulted in grain refinement from ∼10 μm to ∼35 nm and a nearly twofold increase in microhardness. The microindentation measurements showed that the cryorolled samples had a rather homogeneous structure. An increase in…
Multi-wall carbon nanotube/polyaniline (CNT/PANI) nanocomposite thin films for electrochemical electrode applications are synthesized on flexible graphene-coated indium-tin-oxide (ITO) substrates by using a drop-casting technique. Graphene serves as an adhesion layer between the CNT/PANI nanocomposite film and the fle…
This paper presents a comprehensive method of extracting thermal to electrical parameters that appear in a thermoelectric module (TEM). A step-by-step procedure was developed and followed to succinctly extract the parameters needed to model the TEM. These parameters include the Seebeck coefficient, electrical conducti…
Alumina filled epoxy resin is important insulating material, which discharge characteristics are greatly determined by its material properties. In this paper, the surface flashover characteristics of the epoxy resin with various alumina contents (250- 400 phr) in 0.4 MPa SF6 are studied. The short-term and long-term w…
We propose a generalized gradient approximation simple and effective Engel-Vosko (GGA-EV) to calculate the structural, electronic, optical properties of ZnO phases, namely, wurtzite, zinc-blende structures using an implementation of the FP method (L) APW in the framework of the density functional theory (DFT). For Cho…
With the introduction of higher voltages in ‘more electric’ aircraft, the understanding of Partial Discharge (PD) performance has never been more critical. Power frequency PD testing of insulation systems according to IEC 60270 has been well established for some time. Less well established is the measurement of PD cau…
Authors' previous work had introduced a novel on-line partial discharge monitoring sensor CSC (Capacitive Slot Coupler), which frequency band was claimed to be between 100 kHz and 20 MHz. However, after intensive laboratory work and on-site experiment, it was found that frequency characteristic of CSC PD sensor could…
M. Wei and co-workers report the design and fabrication of a new electrode material with a core-shell nanostructure in which a conducting polymer (polypyrrole, PPy) core and CoNi-layered double hydroxide (CoNi-LDH) shell exhibit a significant synergetic effect in supercapacitor performances. On page 3530, the obtained…