Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Polyelectrolyte multilayers successively deposited on an ultrasonically pre-treated metal surface demonstrate anticorrosion self-healing behaviour by the blocking of the corrosion processes without addition of any other inhibiting species due to their pH-buffering ability.
We report that 3 nm diameter CdTe quantum dots can generate enhanced Raman scattering. The Raman signal of 4-mercaptopyridine (4-Mpy) adsorbed on CdTe quantum dots shows a 10 4 enhancement compared with that of bulk 4-Mpy. The enhanced phenomenon based on CdTe quantum dots also provides new insight to help understand…
Novel tissue engineering scaffold materials of nano-hydroxyapatite (nHA)/silk fibroin (SF) biocomposite were prepared by freeze-drying. The needle-like nHA crystals of about 10 nm in diameter by 50-80 nm in length, which were uniformly distributed in the porous nHA/SF scaffolds, were prepared by a co-precipitation met…
Pd-only, Au-only and bimetallic AuPd catalysts supported on a range of supports (Al2O3, TiO2, MgO, and C) have been prepared by impregnation and tested for the hydrogenation and decomposition of hydrogen peroxide under conditions similar to those used in direct synthesis of hydrogen peroxide. Hydrogenation and decompo…
Recent findings on Heusler-type alloys in NiMnIn- and NiMnSn-based systems show a specific martensitic (i.e., diffusionless) transformation from a ferromagnetic parent (P) phase to an antiferromagnetic-like martensite (M) phase. In this paper, the magnetic and martensitic properties and the details of the magnetic fie…
Drug delivery systems (DDS) are an important component of drug development and therapeutics. The field is quite extensive and requires an encyclopedia to describe all the technologies. The aim of this book is to put together descriptions of important selective technologies used in DDS. Important drugs, new technologie…
The dependence of mechanical properties of 3Y-TZP ceramics on their grain sizes in the range from 0.19 µm to 2.15 µm has been investigated. Vickers indentation tests were used to determine hardness and fracture toughness. The hardness decreased with increasing grain size. The fracture toughness was almost constant for…
A theoretical model is proposed to estimate the length of three-phase boundary (TPB) of ion-impregnation-derived solid oxide fuel cell (SOFC) electrodes, which have experimentally shown considerable advantages in performance when compared with standard composite electrodes such as Ni–yttria-stabilized zirconia (YSZ) a…
New TbFeAs(O,F) and DyFeAs(O,F) superconductors with critical temperatures T(c) = 46 and 45 K and very high critical fields, >or=100 T, have been prepared at 1100-1150 degrees C and 10-12 GPa, demonstrating that high pressure may be used to synthesise late rare earth derivatives of the recently reported RFeAs(O,F) (R…
Experimental data on sulfur's impact on solid oxide fuel cell (SOFC) nickel anodes have been analyzed using an isotherm for the sulfur coverage on the Ni surface: , where is the ratio between the partial pressures of hydrogen sulfide and hydrogen. The loss of performance, , of the SOFC can be correlated by , where dep…
White-light emitting ultra-small CdSe nanocrystals present exciting possibilities in the area of solid-state lighting technology. In this work, thirteen dissimilar polymers were examined as potential encapsulants for these single-sized nanocrystals. Films of the encased nanocrystals were characterized in terms of nano…
The coordination of boron to a range of polypyrrole-containing ligands is explored in this feature article. The boron dipyrromethenes are well-known as laser dyes and fluorescent labels in biology. Subphthalocyanine and subporphyrin macrocycles containing only three pyrrole rings can exist only when templated by a cen…
Chitosan is a natural biopolymer which stimulates growth and increases yield of plants as well as induces the immune system of plants. The objectives of this study were to determine appropriate applications for increasing of the rice yield. The experiment was performed with randomized complete block design (RCBD) with…
This article identifies the important electrical parameters that need to be measured and understood to establish the reliability of devices operating under DC voltages. Thus there is a strong economic and technical reason to understand and master the use of materials in HVDC applications. The basic electrotechnical da…
A facile approach is presented to fabricate three-dimensional ordered microporous thin films by self-assemblyvia an amphiphilic block polymer, polystryene-b-polyacrylic acid (PS-b-PAA). The highly ordered microporous thin films were formed by casting a PS-b-PAA tetrahydrofuran (THF) solution onto a glass slide under h…
Bilayer electrolytes made of barium cerate covered with a thin film of barium zirconate deposited by pulsed laser deposition show promise for improving chemical stability without greatly affecting electrochemical performance in fuel cell operation.
Internal electrode resistance plays a role affecting the power capability of electric double-layer capacitors. Capacitor cells made of activated carbon cloth are analyzed using ac impedance spectroscopy. To reduce the internal resistance, carbon nanotubes (CNTs) are grafted on the carbon cloth via sputtering catalyst…
In this tutorial review I discuss the significant impact that surface science has had on our understanding of the catalytic phenomena associated with automobile exhaust depollution catalysis. For oxidation reactions it has generally been found that reactions are self-poisoned at low temperatures by the presence of str…
The present study investigates the effect of tartaric acid on anodic film morphology and on corrosion resistance of hydrothermally sealed anodized AA2024. Anodizing treatment was performed in dilute sulfuric acid electrolyte with or without addition of tartaric acid. Hydrothermal sealing was carried out in boiling wat…
Nanoscaled and nanoporous ͑La 0.5 Sr 0.5 ͒CoO 3-␦ ͑LSC͒ thin film cathodes ͑film thickness ranging from 200 to 300 nm, grain and pore size in the range of 50 nm͒ were electrochemically characterized to determine their potential for intermediate and lowtemperature solid oxide fuel cells ͑SOFCs͒.Chemically homogeneous,…