Materials Literature
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Polycrystalline Pb(Zr0.52Ti0.48 )O3 (PZT) microtubes are fabricated by a vacuum infiltration method. The method is based on repeated infiltration of precursor solution into macroporous silicon (Si) templates at a sub-atmospheric pressure. The pyrolyzed PZT tubes of a 2-?m outer diameter, extending to over 30 ?m in len…
Crystal growth process of YBa2Cu3O7-X (YBCO) films with BaZrO3 (BZO) pinning centers were investigated to enhance JC property by controlling microstructure of the films. The YBCO films were fabricated by a metal organic deposition (MOD) method using solutions with trifluoroacetates (TFA) and Zr-salts. Quenched films w…
Nanocrystalline Zn0.925Mn0.025Fe0.05O thin films were deposited on glass substrates by r.f. sputtering in pure argon gas environment. The average grain sizes of the films decrease with increase in thickness. The optical transmission studies show the films to be highly transparent (75-90%). The direct energy band gap d…
an urgent need to understand how all countries were reacting. Easy electronic communication between colleagues also meant it was possible to share ICRP publications with those who needed quick access, and to discuss these recommendations and share experience relevant to the evolving situation. More than ever, at that…
Abstract FEBIP –focused electron beam induced processing- is a novel technology which renders outstanding advantages compared to other miniaturization techniques, like electron beam lithography, deep X-ray lithography, or 3D construction by optical polymerization. The principle, process characteristics, outstanding re…
Crystallization is used to produce vast quantities of materials. Batch crystallization is widely practiced for high-value products. Batch crystallizers are desired to operate at an optimal trajectory to produce a desired product quality and crystal size distribution (CSD). In this work the dynamic optimization via non…
A scanning Kelvin probe technique is used to study the influences of the enriched alloy layers on the corrosion behavior of surface-treated, sputtering-deposited Al-0.7at.%Cu and Al-1.0at.%Au alloys. The alloys were etched in sodium hydroxide solution to produce the enriched layers of copper and gold respectively at t…
By using the matrix decomposition and the reverse order law, we provide some new expressions of the Drazin inverse for any 2 × 2 block matrix with rank constraints.
In this paper, we provide a method for the simultaneous measurement of the inner diameter of nanotubes with a regular shape and calculation of their mean inner potential (MIP) using electron holography. This method contains 4 steps: (i)phase profile characterization from electron holography; (ii) shape assumption from…
We report the synthesis of undoped ZnO and Al-doped ZnO (ZnO:Al) nanowires grown using a two-step process: (a) preparation of the seed layer, and (b) growth of the nanostructures. In the first step, 10 mM solutions of zinc acetate dihydrate and 1-propanol were spin coated on polyethylene terephthalate (PET) substrate…
Purpose. Based on the experiment of the microarteriogenesis that is associated with angiogenesis during tissue repair process in porous silk fibroin films (PSFFs), we investigate the characteristics of micro-arteriogenesis and explore its mechanism. Methods. After the porous silk fibroin materials are implanted into t…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Ivan Kralov, Petko Sinapov, Krasimir Nedelchev, Ignat Ignatov; Friction induced rail vibrations.…
Burning velocity just after spontaneous ignition has been examined not only experimentally but also theoretically, as related to a Self-propagating High-temperature Synthesis (SHS) process, for a Ti-Al system. After varying the mixture ratio, the degree of dilution, and the compact and particle sizes, the spontaneous…
Crystalline silicon thin film solar cells, based on the epitaxial wafer equivalent, require a reflecting interlayer between substrate and active layers to increase the generated current and reach similar efficiencies as wafer based solar cells. With the epitaxial lateral overgrowth technique, a reflecting dielectric l…
The article presents a novel kinetic method for the solution of time-dependent source-driven linear transport problems. As will be discussed, the method is based on a multigeneration representation of linear Boltzmann equations and is derived from physically grounded considerations. The technique is said to be hybrid…
A large decrease is observed in the critical current density of YBCO coated conductors (CC) and related compounds when a strong perpendicular magnetic field is applied. While measurements are generally carried out at 77K only, here we present a magnetic technique permitting to determine the critical current per unit w…
Crystalline silicon solar cells with high ohmic emitters show higher efficiencies due to a better blue response. Unfortunately, the only way to contact them by screen printing is using the selective emitter technology. This study shows that contacting emitters with Rsh = 100 Ω/sq can be achieved by standard screen pri…
Copolymer based on triphenylamine (TPA) and 3,4-ethylenedioxythiophene (EDOT) is polymerized electrochemically. The structure, morphology and electrochemical properties of the obtained copolymer are investigated by cyclic voltammetry and FT-IR spectroscopy. The results confirm the copolymerization of TPA/EDOT. UV-vis…
The deformation and stacking of graphene significantly affect the overall electronic and mechanical properties. The graphene sheets are easily stacked each other due to van der Waals attraction. The folded characteristic may prevent graphene stacking and increase the d-spacing between graphenes. It can easily form den…
The electrical quality of the GeO 2 /Ge interface, prior to and after Gd 2 O 3 deposition, has been investigated as a function of the oxidizer (atomic O, O 2 , O 3 ) used for the GeO 2 based passivation of the Ge surface. In particular, the density of interface traps depends on the details of the Ge oxidation process…