Materials Literature
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Abstract Fibrous mat was produced from eri silk fibroin by electro spinning. The fibrous mat was tested for tensile properties and in-vitro bio-degradation by enzymatic treatment. The tensile strength of the mat was 5.3 MPa and its elastic modulus was 49 MPa before bio-degradation. The weight loss obtained after 30 da…
A new energy harvesting hybrid device that operates selectively in photovoltaic (PV) mode or thermoelectric (TE) mode has been proposed, and successfully fabricated using organic materials. Here, while keeping the TE properties comparable to the best data ever reported, PV properties have been improved dramatically, a…
The influence of annealing (600°C) on the microstructure of L70 cold-rolled brass with additions of bismuth and lead in amounts from 0.001 to 1% is investigated. It is shown that the size of the recrystallized grain is almost independent of these additions, while the Bi-containing and Pb-containing phases themselves a…
The effect of the support composition on the Au-support interactions and its role in the creation of the activity of Au/CeO 2 -ZrO 2 catalysts in CO oxidation has been studied. The CeO 2 -ZrO 2 oxides and Au/CeO 2 -ZrO 2 catalysts were synthesized, characterized by BET, XRD, HRTEM, AAS, TPR-H 2 , and tested in CO oxid…
The initial stages of the growth of barium strontium titanate (BaSrTiO 3 ) ferroelectric films deposited on single-crystal sapphire substrates have been studied using medium-energy ion scattering. It has been found that, depending on the variation in the deposition temperature, the mechanisms of formation of the ferro…
Abstract Summary: This article describes the development and evolution of two‐photon lithography of 3‐dimensional (3D) polymeric structures through two‐photon photopolymerization (TPP) and the materials used to facilitate the same. The first part elaborates on the advantages of TPP over conventional lithographic techn…
Self assembly systems formed by malic acid and alkyloxy benzoic acids are characterized. The ferroelectric ingredient malic acid formed double hydrogen bond with p-n-alkyloxy benzoic acids. Various hydrogen bonded complexes have been synthesized with malic acid and pentyl to dodecyloxy benzoic acid, respectively. Four…
This paper demonstrates the integration of a composite high-κ gate stack (3.3 nm Al2O3-1.0 nm GaSb) with a mixed anion InAs0.8Sb0.2quantum-well field effect transistor (QWFET). The composite gate stack achieves; (i) EOT of 4.2 nm with-7A/cm2gate leakage (ii) low Ditinterface (~1×1012/cm2/eV) (iii) high drift μ of 3,90…
An electrical double layer at the interface between an aqueous electrolyte solution and a carbon electrode has been investigated. In order to estimate the capacitive properties of such a system and to reveal the main factors affecting its properties, quantum molecular dynamics simulation of the electrical double layer…
As the multiplicity of uses to which nanomaterials may be put can make it difficult to locate appropriate regulatory regimes in Europe, it is chemicals policy that has the greatest potential (realisable or otherwise) for the substantive governance of nanosubstances. The Regulation on the Registration, Evaluation, Auth…
The luminescence properties of lanthanum silicon oxynitride (La-Si-O-N) series doped by trivalent Ce ions have been investigated to seek for tunable wavelength-conversion phosphor for white light emitting diode applications. Four compound hosts of LaSiO 2 N, La 4 Si 2 O 7 N 2 , La 5 Si 3 O 12 N, and La 2 Si 6 O 3 N 8…
The potential of carbonized bagasse (waste from sugar cane) as filler in rubber products have been investigated. The products were evaluated for Tensile strength, Compression test, Abrasion resistance, Hardness and Elongation at break. Results shows that as the filler loading increased the tensile strength, abrasion r…
Gate voltage control of carrier density and quantum capacitance is an important step for understanding the device physics and assessing the performance of nanoscale transistors. In this paper, we present a simple phenomenological model for the carrier density and quantum capacitance of graphene nanoribbon field-effect…
The crystal structure of β-CaMg 2 (SO 4 ) 3 (“perkovaite”), an anhydrous Ca–Mg sulfate from coal dumps of the Chelyabinsk coal basin, in Russia, was solved by direct methods and refined to an R 1 value of 0.054, calculated for the 1808 unique observed (| F o | ≥ 4σ F ) reflections and 234 refined parameters. The compo…
BACKGROUND: Computer languages can be domain-related, and in the case of multidisciplinary projects, knowledge of several languages will be needed in order to quickly implements ideas. Moreover, each computer language has relative strong points, making some languages better suited than others for a given task to be im…
A deep insight in the conduction processes in phase-change memory (PCM) devices is needed for a reliable size scaling of the technology. In this paper we discuss and model the temperature and time dependences of the programmed cell resistance. The non-Arrhenius behavior of the resistance is interpreted by temperature-…
Field effect mobility of the graphene transferred on the SiO2/Si substrate scatters in various reports and is limited to a typical value of ~10,000 cm2/Vs. Without understanding the interaction between graphene and SiO2, it is difficult to improve transport properties. This paper discusses effects of various plasma tr…
Abstract Six novel disubstituted phenylene‐linked bis‐imidazole derivatives, 3a – 3f , were prepared by a one‐pot, microwave‐assisted method under solvent‐free conditions, in yields ranging from 61.6 to 85.6%. The new compounds were characterized by 1 H‐ and 13 C‐NMR, UV/VIS, and fluorescence spectroscopy, and mass sp…
The electronic properties of arrays of carbon nanotubes from several different sources differing in the manufacturing process used with a variety of average properties such as length, diameter, and chirality are studied. We used several common surfactants to disperse each of these nanotubes and then deposited them on…
We theoretically study the Landau level spectrum of a graphene bilayer subjected to a magnetic field and an electric field simultaneously. From the analytic expressions obtained, we can controllably modulate the Landau level structure by applying external fields. We also give an explicit criterion for determining the…