Materials Literature
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Ferroelectric and piezoelectric thin films are gaining more and more importance for the integration of high performance devices in small modules. High-K 'Integrated Discretes' devices have been developed, which are based on thin film ferroelectric capacitors integrated together with resistors and ESD protection diodes…
High pressure behavior of sodium titanate nanotubes (Na 2 Ti 2 O 5 ) is investigated by Raman spectroscopy in a diamond anvil cell (DAC) at room temperature. The two pressure-induced irreversible phase transitions are observed under the given pressure. One occurs at about 4.2 GPa accompanied with a new Raman peak emer…
Among several aspects concerning the growth of thin films on solid surfaces, we focus our discussion on the physical observable known as the island size distribution function (SDF). Since this is a subject large enough to require a full review, even a whole book, we have limited our survey to the scaling properties of…
The resistive switching of NiO sandwiched between Pt bottom and top electrodes are formed by thermal oxidation at the temperature from 300°C to 800°C. The ReRAM characteristics are investigated from the view point of practical applications. The stable and uniform formation of NiO films are revealed by XPS analysis and…
We report the growth of high-quality thin ZnO films with controlled microstructure on Si(111) substrates by ultrasonic spray pyrolysis of Zn-containing solutions.
The mono- and heteronuclear complexes of the general formula M-ATPP-Ln-L ( Ln = Yb , Lu; M = Zn , Cu , 2H ; ATPP - mono-p-aminotetraphenylporphyrin; L = EDTA - ethylenediaminetetraacetic acid or DTPA - diethylenetriaminepentaacetic acid) were prepared and characterized by elemental analysis, MS, 1H NMR, UV-vis and lum…
Methods of X-ray diffraction, electron microprobe analysis, electron microscopy, differential thermal analysis, and microdurometry were used to study the effect of alloying with 5.2 and 8.5 at % hydrogen on the occurrence of phase and structural transformations in the intermetallic alloy Ti—24.3 Al—24.8 Nb—1.0 Zr—1.4…
A pyramidal pattern was produced on a c-plane sapphire substrate by a mask-free etching process. Photoluminescence (PL) results show that a GaN-based light-emitting diode (LED) epilayer grown on the pyramidally patterned sapphire substrate has higher epitaxial quality than that grown on a standard flat c-plane sapphir…
Similar to folding of proteins into three-dimensional (3D) structure, self-assembly of metallic nanoparticles (NPs) into dendritic or other supramolecular structures is of greater interest, yet less understood. We observed spontaneous, template-free organisation of silver NPs into 3D, dendritic, elegant, flower-like s…
An asymptotic theory for predicting the thickness distribution and geometry of the boundaries of a thin nearly planar fluid sheet and analyzing the stability of its shape is developed starting from the balance law for mass and momentum for a continuous medium. The resulting equations comprise a transient two-dimension…
Vertically-well-aligned ZnO nanorods were synthesized on Ti buffer layers by a metal-organic chemical-vapor deposition process. Structural analyses demonstrated that the ZnO nanorods were well-aligned in the c-axis and ab-plane. Transmission electron microscopy (TEM) showed that the Ti buffer layer was amorphous and i…
Two samples of mesoporous anatase nanoparticles, prepared by the sol-gel method, were characterised by Cs-corrected high resolution transmission electron microscopy (HRTEM), X-ray powder diffraction (XRD) and Raman spectroscopy. Statistical evaluation of TEM data showed an average diameter of these crystallites of 8.8…
The ground state of a two-dimensional ionic mixture at zero pressure composed of oppositely charged spheres is determined as a function of the size asymmetry by using a penalty method. The cascade of stable structures includes square, triangular and rhombic crystals as well as “empty” crystals made up of dipoles and c…
This article deals with the subject of synthesizing with the use of the extraction pyrolysis method of nanosized composites based on iron, manganese, bismuth, zirconium, europium, terbium oxides, and metal platinum, both in the form of powder and thin coatings on dielectric supports. The composition, morphology, and p…
Computer-aided simulation performed via two independent methods (the Monte Carlo method and method of dissipative particle dynamics) is performed for studying the effect of microphase separation in concentrated solutions of diblock copolymers composed of linear blocks A and amphiphilic blocks A - graft - B . The type…
The final stage of PVC gelation during kneading until the moment of equilibrium state of the torque has been discussed. The processing of unplastified PVC compounds was carried out in the Brabender mixing chamber at chamber temperature (Tch) 150, 160, 170, 175, 180, 185 or 200° and at rotational speed of the blades: 5…
As separate materials, polymers and ZnO are already considered to be important technologically. They have found several commercial applications in optoelectronics and sensors. Despite that, research activities involving these materials are still in full swing. For example, there is a lot of effort in developing high e…
Cu2PO4OH with various hierarchical morphologies were synthesized using a hydrothermal method by simple adjusting the pH value and temperature. The prepared powders were characterized by X-ray diffraction (XRD), Raman spectroscopy, fourier-transform infrared spectroscopy (FT-IR), and UV-Vis diffuse reflectance spectros…
Excimer laser irradiation at ambient temperature has been employed to produce nanostructured silicon surfaces. Nanoindentation was used to investigate the nanomechanical properties of the deformed surfaces as a function of laser parameters, such as the angle of incidence and number of laser pulses at a fixed laser flu…
Electronic structures of cubic perovskite oxides of ${\text{SrMn}}_{1\ensuremath{-}x}{\text{Fe}}_{x}{\text{O}}_{3}(0\ensuremath{\le}x\ensuremath{\le}1)$ have been investigated by employing photoemission spectroscopy (PES) and soft x-ray absorption spectroscopy (XAS). The spectral intensity near the Fermi level $[I({E}…