Materials Literature
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In this study, radio frequency magnetron sputtering was used to deposit nickel oxide thin films (NiO, deposition power of 100 W) and titanium-doped zinc oxide thin films (TZO, varying deposition powers) on glass substrates to form p(NiO)-n(TZO) heterojunction diodes with high transmittance. The structural, optical, an…
The strain dependent magnetocaloric properties of La0.67Sr0.33MnO3 thin films deposited on three different substrates (001) LaAlO3 (LAO), (001) SrTiO3 (STO), and (001) La0.3Sr0.7Al0.65Ta0.35O9 (LSAT) have been investigated under low magnetic fields and around magnetic phase transition temperatures. Compared to bulk sa…
Enzymes are essential in the human body, and the disorder of enzymatic activities has been associated with many different diseases and stages of disease. Luminescent semiconductor nanocrystals, also known as quantum dots (QDs), have garnered great attention in molecular diagnostics. Owing to their superior optical pro…
The switching effect, field and temperature dependences of the permittivity and conductivity of TlGaTe 2 crystals subjected to various γ-irradiation doses are studied. Under rather low electric fields, the phenomenon of threshold switching with an S -shaped current-voltage characteristic containing a portion with nega…
Titanium dioxide (TiO 2 ) films were deposited on fluorine-doped tin-oxide (FTO) glass by sputtering and sol–gel combustion (SGC) coating methods and investigated with respect to their electrochemical luminescence (ECL) performance. The sputtered TiO 2 films were denser than the SGC-deposited films, while the SGC film…
Peculiarities of the formation of the high-coercivity state of sintered magnets prepared from a rare-earth-metal-depleted Nd-Pr-Dy-Fe-B composition alloyed with terbium hydride were studied. Terbium hydride additions were shown to increase substantially the magnetization coercive force and to decrease slightly the res…
Nanosilica powder produced from rice husk ash (RHA) via NaOH treatment has particle size in the range of 10-20 nm as revealed by transmission electron microscopy (TEM). The inhibitive action of nanosilicate from RHA on the corrosion of carbon steel SAE1045 in 0.5M HCl solution was studied using weight loss and potenti…
The synthesis of aligned multi-walled carbon nanotubes (MWCNTs) using thermal and floating catalytic chemical vapor deposition (CVD) method has been optimized in order to obtain MWCNTs with specific characteristics namely diameter and thickness of nanotubes array. Process parameters such as substrate preparation which…
Characteristics of a field-electron emitter based on a nitrocelulose-multiwalled carbon nanotube composite have been studied. A new method of the recording and online processing of current-voltage ( I–U ) characteristics of multipoint field-electron emitters has been developed for monitoring the evolution of their pro…
Resonant bending-mode magnetoelectric (ME) coefficients of magnetostrictive-piezoelectric multilayer cantilevers are calculated analytically using a model developed for arbitrary multilayers on a substrate. Without quality factor effects the ME coefficient maxima in the four-dimensional parameter space of layer number…
This study deals with the need to develop analytical instruments to optimise rescue operations involving radiological exposure. It reports several aspects of analysis and characterisation of orphan radioactive sources. The protection problems in cases of detection and securing of radioactive sources are analysed, with…
We demonstrate in this article an exciting new method for obtaining electron Kikuchi diffraction patterns in transmission from thin specimens in a scanning electron microscope (SEM) fitted with a conventional electron backscattered diffraction (EBSD) detector. We have labeled the method transmission EBSD (t-EBSD) beca…
Advanced power inverters for electric drive vehicles require capacitors that operate under high voltage at under-hood temperatures and have minimal footprint. This need can be realized by embedding ceramics with high dielectric constant within a printed wire board (PWB). The “film-on-foil” approach, where the high-die…
We develop a general method to study the capillary interactions between objects of arbitrary shape which float close to each other on an interface, a regime in which multipole expansion is not useful. The force is represented as a power series in the small distance between the objects, of which the leading order is fi…
A method for the analysis of high-speed hysteresis micromotor by using a magnetostatic field solution and Piece-Wise-Linear (PWL) model of scalar static hysteresis is presented. The solution of the magnetic field in the active layer of the hysteresis motor is performed by a two steps approach: nonlinear on the whole m…
We demonstrate the possibility of existence of indirect moving Wannier-Mott excitons in graphene. Electron-hole binding is conditioned by the trigonal warping of conic energy spectrum. The binding energies are found for the lowest exciton states. These energies essentially depend on the value and direction of exciton…
In this paper, we model and characterize the thermomechanical behavior of SMA springs based on Brinson's constitutive model of SMAs. The model developed in this paper can be used to compute the recovery length of SMA springs. We used the model to develop a temperature feedback position controller to control the joint…
A comparative study is performed on Hypericum perforatum ( H. perforatum ) and doxorubicin (Dox) anticancer agents. Double emulsion and sonication techniques were used to enhance drug loading efficiency in poly(lactic‐co‐glycolic acid) (PLGA) nanoparticles (NPs). To distinguish the efficiency of the double emulsion me…
The photoluminescence properties of cadmium-selenide (CdSe) quantum dots with an average size of ∼3 nm, embedded in a liquid-crystal polymer matrix are studied. It was found that an increase in the quantum-dot concentration results in modification of the intrinsic (exciton) photoluminescence spectrum in the range 500–…
Type-VIII clathrate Ba 8 Ga 16 Sn 30 is a promising thermoelectric material in the 400–600 K range. We report on the effects of Ge substitution for Sn on both crystal growth and thermoelectric properties. In a series of samples prepared from the initial composition of Ba 8 Ga 40 Sn 30− X Ge X (0 ⩽ X ⩽ 6), the size of…