Materials Literature
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A new transmission-type electron multiplier was fabricated from silicon-on-insulator (SOI) material by integrating an array of one-dimensional (1D) silicon nanopillars onto a two-dimensional (2D) silicon membrane. Primary electrons are injected into the nanopillar-membrane (NPM) system from the flat surface of the mem…
Silver films were deposited on glass substrates under different deposition conditions, i.e. different film thicknesses, deposition rates and deposition angles. Their optical properties were measured by spectrophotometry in the spectral range of 185–3300 nm. The Kramers–Kronig method was used to analyze the reflectivit…
Nanosized Al 2 O 3 particles homogeneously dispersed in a matrix of amorphous carbon (a‐C) were prepared by decomposition of an aluminum oleic emulsion at 600°C in Ar. Nanosized aluminum nitride (AlN) grains were prepared by carbothermal reduction and nitridation (CRN) of this Al 2 O 3 –a‐C mixture in NH 3 using graph…
Abstract A novel series of hyperbranched polyether polyols with various n ‐alkyl amine cores (mono‐ and bifunctional) and photoactive cores (benzylamine and 1‐naphthylmethylamine) have been prepared. Polymerization of glycidol was carried out in two ways, starting directly from primary amine initiators and from bisgly…
A non-linear magnetomechanical plate model has been developed to predict the magnetic induction, elastic and magnetostrictive strain and mechanical stress in a laminated structure with magnetostrictive and non-magnetic layers under the simultaneous effect of quasi-static mechanical stress and the magnetic field. This…
It is generally accepted that dynamic culture conditions are required for vascular tissue engineering. We compared the effects of two dynamic culture systems, a perfusion and a rotating bioreactor, using tubular constructs based on hyaluronic acid seeded with porcine aortic smooth muscle cells (SMC), that we recently…
We have succeeded in synthesizing the Heusler compounds Ru2CrGe and Ru2CrSn and performed magnetization measurements in high magnetic fields up to 18T in order to investigate the magnetic properties of Ru2CrGe and Ru2CrSn. We confirmed that the compounds have an ordered Heusler L21 structure. It was found that Ru2CrGe…
Polyaniline (PANI)-ZnO nanocomposite thin film has been successfully fabricated on glass substrates by using vacuum deposition technique. The as-grown PANI-ZnO nanocomposite thin films have been characterized using X-ray diffraction, Scanning Electron Microscopy, Atomic Force Microscopy, UV-visible spectrophotometer a…
We prepared transparent polyimide (PI) and organo-modified montmorillonite (OMMT) nanocomposite films from the solution of poly(amic acid) and various amounts (0.5-2 wt%) of OMMT in N,N-dimethylacetamide (DMAc). The Poly(amic acid) was prepared from the reaction of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (…
We report the improved ferroelectric properties in dielectric/multiferroic/dielectric sandwich structures composed of Ba0.5Sr0.5TiO3 (BST) and Bi1.05La0.05FeO3 (BLF). Compared with the single BLF film, the trilayer structures exhibit a lower dielectric loss and weaker frequency dependence of dielectric properties. At…
Ribonucleic acid (RNA) is an important genetic material whose lifetime is most often determined by the rate of its enzymatic degradation. Our studies showed that multi-walled carbon nanotubes and single-walled carbon nanotubes functionalized with carboxylic groups interacted with ribonuclease A (RNase A) and caused th…
The thermoluminescence (TL) of undoped and Dy3+ doped ZrO2 nanocrystals under beta-ray irradiation is reported. The TL glow curves are the result of the overlapping of four TL peaks produced partly by the intrinsic defect of highly asymmetrical monoclinic structure and partly due to defects produced during the synthes…
Inhomogeneous magnetoelectric coupling in a simple Pb(Zr,Ti)O3/Terfenol-D laminate composite is investigated. Four magnetic-field-induced voltage (MIV) and three electric-field-induced magnetization (EIM) resonance frequencies are caused by magnetomechanical and electromechanical resonances. The different positions in…
Here, we report a drastically improved anticorrosive characteristic of magnesium alloy composites with the introduction of multiwalled carbon nanotubes. Highly depressed corrosion of nanotube-filled magnesium composite in salt water is due to the formation of stable oxide films along the grain boundaries of magnesium.…
Antagonistic shape memory actuated structures exploit opposing pairs of one-way shape memory alloy (SMA) linear actuators to create devices capable of a fully reversible response. Unlike many conventional reversible SMA devices they do not require bias force components (springs) to return them to their pre-actuated co…
Our Raman measurement indicates that the intensity of the peaks (510 and 645cm−1) related to nitrogen concentration is enhanced in MgZnO compared with that in ZnO. Using first-principles band structure methods, we calculated the formation energy and transition energy level for nitrogen acceptor in ZnO and random MgxZn…
Metallic metamaterials, by periodically arranged double rings, without splits in both of them, are investigated to show their negative refraction at the magnetically resonant transmission band. It is verified that the negative refraction occurs in the transmission regime where the electric response is attributed to th…
Abstract On the basis of a quantum‐chemical description of the lowest singlet electronic excited states of bi‐chromophoric model systems, we have disentangled the through‐bond (TB) from the through‐space (TS) contributions to the electronic interactions mediating energy hopping in rigid‐rod conjugated polymers. While…
First-principles calculations indicate that the chalcogenide spinels CdxCu1−xCr2S4 and CdxCu1−xCr2Se4 can be ferromagnetic metals, half-metals, or semiconductors depending on the Cd concentration x. In particular, CdxCu1−xCr2S4 can be tuned to be effectively half-metallic for x values between 0.25 and 0.875 and CdxCu1…
Multiwalled carbon nanotubes (MWNTs) were functionalized by oxygen plasma treatment. Photoelectron spectroscopy study of oxygen plasma treated MWNTs (O-MWNTs) shows surface modification with hydroxyl and carboxyl groups. C60 decoration of MWNTs were carried out by thermal evaporation and more dense distribution of C60…