Materials Literature
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Hydrogenated amorphous carbon (a-C:H) films were deposited using a RF magnetron sputtering system in H 2 /He plasma. The bonding hydrogen concentration ( n H ), optical gap, hardness and Raman spectrum of these a-C:H films were measured. Two significant peaks centered at ∼1150 and ∼1450 cm -1 were observed in the Rama…
Abstract The optical properties of nanoporous alumina (Al 2 O 3 ) prepared by electrochemical anodization of aluminum foils are studied. The samples show an ordered array of nanometric sized pores. Their reflectance spectra show an absorption edge in the UV that shifts into the visible with anodization temperature. A…
Abstract An intercalated polyurethane (PU) /clay nanocomposite was prepared by in situ intercalative polymerization. The PU/clay nanocomposite pellet or film samples were stretched‐recovery‐restretched, using selfmade microstretching tools. The changes of the basal spacings of clay and the orientation of polymer chain…
Poly(trimethylene terephthalate)/polypropylene (PTT/PP) blends were prepared by melt blending. The rheology, morphology, melting, and mechanical properties of PTT/PP blends were investigated with and without the addition of polypropylene‐graft‐maleic anhydride (PP‐g‐MAH). The melt viscosity results showed that the flu…
Given their ephemeral nature, the preservation of historic silks can be problematic. Rapid, on-site condition monitoring would offer significant benefits to conservators and museum curators concerned with continued access to collections. In this paper, near-infrared spectroscopy (NIR) is investigated as a noninvasive…
Abstract Sb 2 S 3 thin films are obtained by evaporating of Sb 2 S 3 powder onto glass substrates maintained at room temperature under pressure of 2×10 ‐5 torr. The composition of the thin films was determined by energy dispersive analysis of X‐ray (EDAX). The effect of thermal annealing in vacuum on the structural pr…
Four calamenene sequiterpenes, (+)-(7R,10S)-15-hydroxycalamenene (3), (+)-(7R,10S)-2,15-dihydroxycalamenene (4), (+)-(7R,10S)-2-hydroxy-15-calamenal (5), (+)-(7R,10S)-15-calamenal (6), along with the amorphane sesquiterpene (+)-(1S,6R,7R,10S)-1-hydroxy-3-oxo-amorph-4-ene (16), have been isolated from the Madagascan sh…
The nature of the chemical interactions between organic species and mineral surfaces and interlayers has significant implications for many geochemical processes and for medical and materials applications, but the molecular-scale characteristics of such interactions are poorly understood. Here we describe an experiment…
Abstract Poly (e‐caprolactone) (PCL) layered silicate nanocomposites have the advantage adding biocompatibility and biodegradability to the traditional properties of nanocomposites. They can be prepared by in situ ring‐opening polymerization of e‐caprolactone using conventional initiator to induce polymerization in th…
The effect of incorporating trisodium phosphate (TSP) in pea starch (PS) and acidified sodium chlorite (ASC) in calcium alginate upon the antimicrobial activity of TSP and ASC was studied against a 3-strain cocktail of Salmonella inoculated on chicken skin. The influence of polymer coating concentration on skin pH, co…
The reaction of the tridentate ligand-precursor molecule 1, o-HO-p-MeO-C 6 H 3 -C(Ph)=N-(o-C 6 H 4 )-OH, with diorganodichlorosilanes Me 2 SiCl 2 , Ph 2 SiCl 2 and PhAllSiCl 2 yields pentacoordinate silicon complexes R,R′Si[o-O-p-MeO-C 6 H 3 -C(Ph)=N-(o-C 6 H 4 )-O] (2a′: R, R′ = Me; 2b: R, R′ = Ph; 2c: R = Ph, R′ = A…
More than three decades of research have not solved the problem of storing hydrogen on board for transport fuel. Hydrogen storage therefore constitutes a major technological barrier to the hydrogen economy. The present paper considers why the problem is so tough and assesses the prospects for the two most popular stor…
The poling responses of [011]-poled Pb(Zn 1/3 Nb 2/3 )O 3 –PbTiO 3 [PZN–PT] single crystals of a range of compositions and two length orientations have been investigated. The results show that [011]-poled PZN–PT single crystals of [100]-length-cut exhibit much superior transverse properties than [011]-length-cut cryst…
The band structure, total and projected densities of states, and distributions of the valence and difference electron densities for copper and silver oxides are calculated in the framework of the density functional theory in the local approximation with ab initio norm-conserving pseudopotentials in the basis set of ps…
A CNT/ZnO nanocomplex was fabricated by attaching ZnO nanoparticles with various diameters to carbon nanotubes (CNTs). The as-prepared agglomerate ZnO nanoparticles were dispersed and positively charged by utilizing a cationic surfactant cetyltrimethylammonium bromide (CTAB). ZnO/CTAB micelles were subsequently anchor…
Giant volume magnetostriction (GVM) is detected near the Curie temperature T C in La1−x AxMnO3 single crystals (A = Ca, Sr, Ba, 0.1 ≤ x ≤ 0.3) and above T C in La1−x AgyMnO3 (x = y = 0.15, 0.2 and x = 0.2, y = 0.1) ceramics (in the latter system, giant volume magnetostriction attains a value of 6.5 × 10−4 in a magneti…
High-speed particle tracking with digital video creates very large data rates and as a result experimenters are forced to make compromises between spatial resolution, temporal resolution, and the duration over which data is acquired. The images produced in particle tracking experiments typically contain a large amount…
A salt fog test and an inclined plane test have been combined in order to trace changes in electrical and mechanical properties as well as in chemical stability of high temperature cured silicone rubber (HTV) samples containing interfaces. The interfaces were created in two different ways. The first technique, named a…
In this review, fundamentals of nuclear quadrupole resonance (NQR) spectroscopy are briefly outlined. Examples of its applications in drug development are discussed to demonstrate that the NQR method is a sophisticated, non-destructive and valuable analytical technique for studying pharmaceuticals, providing effective…
Long rod insulators made of porcelain and disc type insulators made of porcelain or glass are the main types of HV insulators used since more than 60 years in overhead transmission and distribution lines and also will be the dominating products in the future. Historically based, there exists much published work on the…