Materials Literature
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The thermal transformation of spin-cast thin films to produce nanoporous low-k dielectric layers has been investigated using polymethysilsesquioxane (PMSSQ) for the low-k matrix and polymethylmethacrylate-co-dimethylaminoethylacrylate (PMMA-co-DMAEMA) as the porogen which is volatilized to leave nanopores in the matri…
The paper describes the vector magnetic characteristic analytical method using the vector magnetic hysteretic engineering model. By this method, various kinds of vector magnetic properties, for example vector hysteretic loop, coercive force, magnetic power loss, vector behavior of magnetic flux density B, and magnetic…
Surface relief grating formation was investigated for a series of azobenzene containing polymers with varying molecular weight. The polymers were obtained by a combination of an atom transfer radical polymerization of trimethylsilylethyl methacrylate and subsequent polymeranalogous introduction of the azobenzene chrom…
BaTi 0.975 Zr 0.025 O 3 thick-film microactuators were fabricated by combining screen printing and silicon micromachining. The electric properties of BaTi 0.975 Zr 0.025 O 3 thick films with a small area on a Pt bottom electrode using silicon substrates prepared by screen printing were investigated. The thick films we…
The thermal decomposition and foaming behaviors of blowing agent AC (azodicarbamide) and exo-endothermic blowing agent DDL-105 were investigated systematically. The gas and enthalpy release both showed that DDL-105 exhibited a milder decomposition. The blowing ratio and cell structure were influenced by the decomposit…
Direct Monitoring of the Performance of Scale Control Programs Across the Produced Water Life Cycle via Suspended Solids Analysis Myles Martin Jordan; Myles Martin Jordan Nalco Co. Search for other works by this author on: This Site Google Scholar Jim Buckman; Jim Buckman Heriot Watt University Search for other works…
The optical properties and potential applications of four kinds of fulgide and fulgimide were studied. A parallel optical storage apparatus was set up, which could reach the area density of 4.8 × 107 bits/cm2 on the fulgide/PMMA film. Fourier transform orthogonal circular polarization holographic data storage was perf…
This work focuses on an experimental investigation of the thermodynamic properties of natural organic matter (NOM), and whether fractions of NOM possess the same thermodynamic characteristics as the whole NOM from which they are derived. Advanced thermal characterization techniques were employed to quantify thermal ex…
Statically determinate structures with truss elements have simple mechanisms, light weight, and high rigidity. Based on the flexural truss structure, a high authority actuator comprising a triangular truss core, a facesheet, and actuation elements is proposed. It is clamped at one end and free at the other. The actuat…
Methionine-42, distal to the active site of Escherichia coli dihydrofolate reductase, was substituted by site-directed mutagenesis with 14 amino acids (Ala, Cys, Glu, Gln, Gly, His, Ile, Leu, Pro, Ser, Thr, Trp, Tyr, and Val) to elucidate its role in the stability and function of this enzyme. Far-ultraviolet circular…
Die planktische Diatomee des Süßwassers Cyclotella comensis wird schalenmorphologisch beschrieben. Dabei wird historisches Material von 1890 und rezentes Material von 2001 aus dem locus typicus Comer See, Norditalien, rezentes Material aus dem Großen Boberowsee, Norddeutschland und Material aus Klonkulturen mit Urspru…
Magnetic measurements on Ni _{2-x} Cu _{x} MnGa with 0 ≦ x≦ 0.8 are made in the temperature range between 4.2 K and 440 K. A phase diagram of Ni _{2-x} Cu _{x} MnGa is determined from the results of the temperature dependence of the initial permeability. The Curie temperature T_{C} increases with the Cu…
It has long been known that transitional metal ions and acids in iron gall inks induce degradation of paper support, thus endangering numerous historical materials. Stabilization treatment should therefore consist of deacidification and addition of antioxidants that could be used for stabilization of all historical ma…
In theory, both polarity and steric hindrance are basic factors which affect molecular interactions. To investigate the optical properties and steric structures of chiral compounds having different chiral moieties which affect the wavelength of light reflection in liquid crystal (LC) cells, a series of novel chiral co…
This paper compares smectic phases formed from LC‐homo‐ and LC‐co‐polysiloxanes. In the homopolysiloxane, each repeating unit of the polymer chain is substituted with a mesogen, whereas in the copolysiloxanes mesogenic repeating units are separated by dimethylsiloxane units. Despite a rather similiar phase sequence of…
Stop and play models with input-dependent shape functions are equivalent to the nonlinear Preisach model proposed by Mayergoyz. This equivalence engenders the necessary and sufficient conditions for a hysteretic nonlinearity to be represented by stop and play models that have input-dependent shape functions. A represe…
The concept of surface p K a is introduced and developed for self-assembled monolayers (SAMs). Students use a titration method to determine the p K a of 3-mercaptopropionic acid (MPA) in solution. At the same time they determine the surface p K a of a SAM of MPA on a gold electrode by running a series of cyclic voltam…
Experimental studies of the fracture kinetics of solids have shown that the process culminating in fracture of a stressed solid comprises a sequence of elementary events in which stressed atomic bonds are ruptured by local energy fluctuations. This recognition sparked investigations into elementary fracture events and…
Abstract New multifunctional, soluble and biocompatible polymeric systems exhibiting good physicochemical properties and good binding capacity have been obtained by assembly of smaller PEG components, selectively protected, purified and activated, by use of appropriate polyfunctional linkers. A general process for the…
Recent investigations of ultra fine-grained metals (Cu, Fe, Ni) performed within a Prague-Rossendorf-Ufa collaboration will be reviewed. The specimens were prepared by severe plastic deformation: the high-pressure torsion and equal channel angular pressing. Positron annihilation spectroscopy was used as the main metho…