Materials Literature
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The current work focuses on the effect of silica and titania nanotubes and their synthesis conditions on the potential antibacterial activity. Since most investigations are oriented towards carbon nanotubes, we focused on studying the biological activity of oxide nanotubes obtained under different synthesis and differ…
As plans for new U.S. nuclear power plants encounter problems, their proponents seek to shift ever more economic risk to taxpayers who are already staggering under the weight of other federal bailouts.
We present an elaborate electron-spin resonance study of the low-energy dynamics and magnetization in the ordered phase of the frustrated spinel ZnCr2O4. We observe several resonance modes corresponding to different structural domains and found that the number of domains can be easily reduced by field-cooling the samp…
The accurate estimation of reactor physics parameters related to the presence of cruciform absorber blades in boiling water reactors (BWRs) is important for safety assessment and for achieving flexible operation during the cycle. Characteristics that are affected significantly include distributions of the total fissio…
Novel metal mesh hybrid polymer composite bipolar plates for proton exchange membrane fuel cells (PEMFCs) have been prepared via inserting a copper or alumina mesh in polymer composites. The composition of polymer composites consisted of 70 wt% graphite powder and 0–2 wt% modified multi-walled carbon nanotubes (m-MWCN…
In this work, an upconversion luminescence agent, Er 3+ :Y 3 Al 5 O 12 , was synthesized and its absorption and fluorescent spectra was determined. By calculation, the upconversion efficiency of the emission peak at 320 nm was estimated to be about 3.4%. And then, TiO 2 /Er 3+ :Y 3 Al 5 O 12 composite was prepared by…
In the last years new type Cu-Hf-Al ternary alloys were developed with high glass forming ability and ductility. The addition of Al to Cu-Hf alloys results in improvements in glass formation, thermal stability and mechanical properties of these alloys. We have investigated new Cu-based bulk amorphous alloys in Cu-Hf-A…
An innovative heterojunction is fabricated between two sides of a freestanding thin film of HCl-doped polyaniline (PANI) derivative containing azobenzene side-chain, which is synthesized through an N-alkyl-substituted reaction. Of the film, the side with being irradiated by UV light during preparation is represented a…
For atomic-level investigation of plasticity in amorphous metal, instability analysis which can rigorously describe unstable deformation of atomic structures is a key technique. However, the analytical method cannot be applied to large-scale amorphous metal because of the enormously-increasing computational load with…
A method of electrolytic strengthening on the cutting edge of the cutter is studied to prolong the life of the cutter and to improve the cutting stability.The equipment and the manufacturing processes are developed for electrolytic strengthening on the cutting edge of the rotary cutter.High-speed steel tap is taken as…
A merocyanine dye (D) has been attached covalently to a substituted bis(trichloromethyl)-1,3,5-triazine initiator (T) to give the dye-linked initiator (D-T) in order to reveal the effect of the linked systems on the efficiency of photopolymerization. Fluorescence spectroscopy indicates efficient intramolecular quenchi…
Iron oxide nanostructures including nanoparticles and nanorods have been widely used for numerous in vivo and vitro applications such as magnetic resonance imaging contrast enhancement, tissue repair and drug delivery. All these biomedical and bioengineering applications require that these nanostructures have high mag…
Nanocrystalline terbium aluminium garnet phosphor has been prepared by the calcinations (800-1600°C) of the precursor obtained by sol-gel technique. The particle size measurements and SEM analysis of the as prepared powder show the grain size variation in 50-600 nm range. XRD and FTIR measurements show the development…
This paper describes the use of the shotgun/friability test as a means to determine the level of damage induced in a series of energetic materials. Five propellants and three explosives have been evaluated and the contribution of burning rates, loading density, and binder type on pressurization rates and damage levels…
The influence of alumina additive from 1 to 5 wt.% upon the microstructure and ionic conductivity of ZrO2-8 mol % Y2O3 (YSZ) ceramics, deposited by means of plasma spray technology, was investigated.Plasma sprayed films have been analysed using scanning electron microscopy (SEM) and X-ray analysis (XRD).The microstruc…
The temperature dependences of the heat capacities at 106–330 K of the monoligand Fe(NH 2 trz) 3 I 2 ( I ) and mixed-ligand Fe(Htrz) 0.3 (NH 2 trz) 2.7 SiF 6 · H 2 O ( II ) complexes (Htrz is 1,2,4-triazole, and NH 2 trz is 4-amino-1,2,4-triazole) were studied by adiabatic vacuum calorimetry. The 1 A 1 ⇔ 5 T 2 spin tr…
The fluid delivery process through a rollerball device is investigated by means of physical modeling and numerical simulations. The microfluidic device is intended to deliver liquid above a substrate interacting with the surrounding air. While the fluid is delivered, air entrainment occurs through the capillary gap, c…
This study reports the integration of nano-texture electrode and self-assembly anodic aluminum oxide (AAO) dielectric layer on Si-substrate for capacitive-type micro tactile sensing devices. The advantages of these nano-structure micro devices are as follows, (1) employing AAO as dielectric film for its large dielectr…
The metal-ferroelectric-metal-insulator-semiconductor field-effect transistor (MFMIS-FET) using the (Bi,La)4Ti3O12 (BLT) as a ferroelectric and SrTa2O6 (STA) as a buffer layer is prepared. The Au/STA/Si structure shows about 1 nF/cm2 of the accumulation capacitance value which is equivalent to about 6.2 nm of SiO2. Th…
The standard enthalpies of formation of liquid and gaseous octachlorotrisilane were estimated, Δf H o (298.15, Si3Cl8, g) = −1397(9) kJ/mol and Δf H o (298.15, Si3Cl8, l) = −1447(9) kJ/mol. The decomposition of Si3Cl8 over the temperature range 400–1000 K was studied theoretically.