Materials Literature
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Polyurethanes (PU) and their polymeric derivatives are widely used in the manufacturing of medical devices. It is important to understand how protein adsorbs onto PU materials as this molecular process directly implicates surface biocompatibility. In this work, we compared protein adsorption at the PU film surfaces wi…
It has been proved earlier that electric properties of polymer insulation can be improved by addition of nano-sized inorganic filler. These materials have attracted a lot of attention. With the addition of nano sized MgO filler in Low Density Polyethylene (LDPE), several improvements in material properties were observ…
Preparation of nanomaterial dispersion or nanofluids requires good characterization techniques, including particle size and morphological measurements. A reliable and straight-forward process to characterize and quantify the degree of dispersion and agglomeration is needed. A wet-cell transmission electron microscope…
Most single-wall carbon nanotube field-effect transistors show significant hysteresis in their transfer characteristics between forward and reverse gate bias sweeps. It was proposed that the hysteresis is due to a dynamic charging process at the carbon nanotube-dielectric interface. We have studied the charge injectio…
The reaction of lanthanide oxohalides with CuO and SeO 2 gave the products Cu 3 Ln(SeO 3 ) 2 O 2 X (Ln = lanthanide, X = Cl, Br). The oxochlorides are formed with all lanthanides, while oxobromides are formed only for Ln = La-Gd. The structures of the Cu 3 Ln(SeO 3 ) 2 O 2 Cl phases for Ln = Nd ( I ) and Y ( II ) were…
Abstract Sulfate‐reducing bacteria (SRB) have been identified as the main corrosive microorganisms causing unpredictable failure of materials. In this present work, a strain of thermophile SRB isolated from Bohai oilfield of China has been characterized and preliminarily identified. Furthermore, its effects on carbon…
Carbon nanotube networks are an emerging conductive nanomaterial with applications including thin film transistors, interconnects, and sensors. In this letter, we demonstrate the fabrication of single-walled carbon nanotube (SWNT) networks on a flexible polymer substrate and then provide encapsulation utilizing a thin…
The transverse laser-induced thermoelectric voltages in the tilted La2−xSrxCuO4 (LSCO) thin films are observed for the first time. The detected signals are demonstrated to originate from the anisotropy of thermoelectric power and depend on the Sr-doping level drastically. The largest voltage is observed in the LSCO fi…
Bulk nanocrystalline Cu was synthesized by a pulse electric brush-plating technique. A very large strength (at 2% plastic strain) increase from 644 to 1451 MPa was obtained by compression tests at room temperature and strain rates from 1×10−5 to 3×100 s−1. A transition in plastic deformation mechanism with strain rate…
Preparation of Barium Titanate–Potassium Niobate Solid Solution System Ceramics and Their Piezoelectric Properties, Wada, Satoshi, Nitta, Momoyo, Kumada, Nobuhiro, Tanaka, Daisuke, Furukawa, Masahito, Ohno, Satoshi, Moriyoshi, Chikako, Kuroiwa, Yoshihiro
BaTiO 3 (BT) ceramics are prepared by spark plasma sintering (SPS) and conventional sintering. In conventional sintering, the density and grain size of the ceramics increase with sintering temperature. In SPS, ceramics with more than 97% relative densities can be obtained by sintering at 900 °C for 5 min in air atmosp…
A statistical predictive model is developed that describes the compression properties of phenolic foam reinforced with glass fibers. An analysis of variance is applied to determine the behavior of composite phenolic foam. The material variables used in the study are fiber length, fiber weight fraction and weight perce…
In this paper, we report a Spindt-type field emission array (FEA) with LaB6 as the emitting material. The LaB6 emitters were deposited by e-beam evaporation with low oxide content. As LaB6 in its vapor form is active and absorbs large quantity of residual gases, which oxidizes the LaB6 films, a special e-beam configur…
This review describes the strategy for the development of multifunctional dendrimeric and hyperbranched polymers, collectively named dendritic polymers, aiming at their application as drug and gene delivery systems. Employing well-characterized and mainly commercially available dendritic polymers, the functionalizatio…
The main goal of this paper is to establish a link between the ultracapacitors impedance at low frequency and slow phenomena such as self-discharge and charge recovery. Usually these phenomena are studied in the time domain. However, additional information can be extracted from specific characterization methods in the…
We propose a theory of field induced crystal nucleation in disordered glass structure applicable to chalcogenide phase change memory. In the region of symmetry breaking strong electric fields, the nucleation is dominated by cylinder shaped particles with bias dependent nucleation barriers. Statistical fluctuations in…
The electronic structures of BiFeO 3 (BF) and Mn-doped BiFeO 3 [BF(Mn)] have been studied by X-ray absorption spectroscopy (XAS) and soft-X-ray emission spectroscopy (SXES). BF and BF(Mn) have a mixed valence state of Fe 2+ and Fe 3+ . Their valence band is mainly composed of the O 2p state hybridized with the majorit…
Research Article| September 01 2008 Permanganate formation in the reactions of ozone with Mn(II): a mechanistic study Erika Reisz; Erika Reisz 1University "Politehnica" of Timişoara, Bulevardul Victoriei 2, 300006 Timişoara, Romania Search for other works by this author on: This Site PubMed Google Scholar Achim Leitzk…
Ablation and water etching of low-density polyethylene (LDPE), polytetrafluorethylene, polystyrene, and polyethyleneterephtalate (PET) modified by Ar plasma was studied. The amount of ablated and etched material was determined by gravimetry. The changes in polymer surface morphology were observed using atomic force mi…
Abstract The low-charge dioctahedral 2:1 phyllosilicates are an important group of clay minerals that have a low degree of cation substitution and very weak interlayer interatomic interactions which are difficult to reproduce with quantum mechanical calculations. In order to study the crystallographic properties of th…