Materials Literature
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This paper presents a detailed study of the oscillation characteristics of a bubble confined inside a deformable microvessel, whose size is comparable with the bubble size. The vessel's compliance is characterized by a nonlinear relation between the intraluminal pressure and the expansion ratio of the vessel radius, w…
Myoglobin (Mb), with different net surface charges at different pH in buffers and negatively charged hyaluronic acid (HA) at pH 5.0 in solutions were alternately adsorbed onto various solid surfaces and successfully assembled into {Mb/HA}(n) layer-by-layer films. The Mb in {Mb/HA}(n) films showed a quasi-reversible cy…
Novel liquid crystalline esters have been synthesized with a perfluorocarbonyloxy terminal chain and lateral fluoro substituents in order to determine their influence on mesomorphic behaviour, tilt angle and spontaneous polarization. Certain locations of lateral fluoro substituents provide for very low melting points…
Abstract We present a detailed DFT‐based electronic structure calculation of Co 1– x Fe x S 2 , a model ferromagnetic system with tunable spin polarization, P . It is shown that the position of the Fermi level and the spin polarization can be controlled by x , the Fe concentration. We predict that for x = 0 the system…
In this study, we tissue-engineered heart valves in vivo using autologous bone marrow-derived cells (BMCs). Canine BMCs were differentiated into endothelial cell (EC)-like cells and myofibroblast (MF)-like cells. Decellularized porcine pulmonary valves were seeded with BMCs and implanted to abdominal aorta and pulmona…
We carried out the field-emission characterization of materials, such as diamond-like carbon (DLC), W, and Fe, deposited by focused-ion-beam chemical vapor deposition (FIB-CVD) to develop a field emitter to be used as a nano-tool for spot deposition. As a result, the threshold voltage of the field emission from the DL…
Undoped and nitrogen doped ZnO films were deposited on Si substrates by ultrasonic spray pyrolysis at ambient atmosphere. The p type of conductivity for the nitrogen doped ZnO films has been observed. The concentration of free holes in ZnO films has been found to depend strongly on the resistivity of Si substrate. Wit…
Zinc oxide (ZnO) nanowire (NW) was grown on a ZnO-buffered silicon substrate by a hydrothermal method in an aqueous solution that contained methenamine (C 6 H 12 N 4 ) and zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O). The concentration of the zinc nitrate is the main factor that governed the morphology of the NW. As…
This paper proposes a contribution to understanding the alteration of high-level waste glasses. Numerical simulations, based on a Monte Carlo model, have been performed in parallel to static dissolution tests on simplified glasses. The leaching of borosilicate glasses has been investigated for various compositions con…
We explore the three-dimensional (3-D) electrostatics of planar-gate carbon nanotube field-effect transistors (CNTFETs) using a self-consistent solution to the Poisson equation with equilibrium carrier statistics. We examine the effects of the gate insulator thickness and dielectric constant and the source/drain conta…
C 60 –Co nano-composites, in which Co nano-particles are embedded in C 60 molecules, have been fabricated and a magnetoresistance (MR) ratio of 8% has been observed at T = 4.2 K. In addition, we have succeeded in observing a clear MR curve even at room temperature (RT). The MR effect is ascribed to magnetization of th…
The free energy of formation of zircon (ZrSiO 4 ) from its oxides was determined between 1100 and 1300 K by an electrochemical method, in which values of μ O₂ defined by the two assemblages Fe 2 SiO 4 -Fe-SiO 2 (fayalite-iron-quartz) and Fe 2 SiO 4 -Fe-ZrO 2 -ZrSiO 4 were each measured using oxygen concentration cells…
Three-dimensional (3D) superlattices of gold nanoparticles were prepared at an air/solution interface. The surface of the gold nanoparticles used is protected by N-acetylglutathione (NAG). Morphological studies revealed that the superlattices formed fivefold symmetric structures such as pentagonal rod, decahedron, and…
Since their discovery in the early 1990s, the interest in carbon nanotube (CNT) electronics has exploded. One main factor that controls the device performance of CNT field-effect transistors (CNT MOSFETs) is the electronic structure of the nanotube. In this paper we use three different bandstructure models: 1) extende…
This paper reports the orientation-dependent optical properties of two-dimensional arrays of anisotropic metallic nanoparticles. These studies were made possible by our simple procedure to encapsulate and manipulate aligned particles having complex three-dimensional (3D) shapes inside a uniform dielectric environment.…
New nuclear highly durable glass compositions, able to immobilize a higher concentration of high-level nuclear wastes than current borosilicate nuclear glasses, are being studied. Investigations are performed on rare earth (RE)-rich glasses, known as durable matrices. After a preliminary study on complex and simplifie…
A method for predicting XPS C1s binding energies in polymers has been developed previously [1]. The calculation uses partial atomic charges determined quantum chemically (by the semi-empirical AM1 Method), which are found to provide a linear correlation with the binding energies corrected by the so-called Madelung int…
Kinetics of phosphating MA 21 magnesium-lithium alloys in a zinc-nitrate-phosphate solution (0.25 M Zn2++0.34M PO 4 3− +0.17M NO 3 − +0.02M F−, pH = 2.7) at 25°C is studied with various surface preparation procedures. The effect of the alloy surface pretreatment in titanium-containing activating solutions on the elect…
Crystals of a new rare-earth borate, LaB 5 O 8 (OH) 2 (space group P 2 1 / n ), are synthesized under hydrothermal conditions. The crystal structure is determined by the heavy-atom method without prior knowledge of the chemical formula. The radical anion is a layer composed of pentaborate blocks 5[3 T + 2Δ]. The topol…
Abstract The synthesis of new isocyanate monomers and their polymerization by anionic route is reported. Reaction of 1,6‐diisocyanatohexane with aliphatic alcohols such as methanol, n‐propanol and n‐pentanol in 1:0.5 molar ratios was carried out in the presence of pyridine such that one NCO group remained unreacted.…