Materials Literature
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Within the overall understanding of the glass transition, the relationship between microscopic dynamics and fragility is still to be clarified. Decalin is an organic glass former, for which a cis/trans mixture exhibits the highest known degree of fragility in a molecular system. It is therefore an ideal system for the…
In recent years, biodegradable plastics which have low effect on environment have been developed. However, many of them have lower mechanical properties than conventional engineering plastics. Reinforcing them with a natural fiber is one of reinforcing methods without a loss of their biodegradability. In the present s…
Homoleptic gallium tris(alkoxides) [Ga(OR)3]2 were prepared by the reaction of [Ga(NMe2)3]2 (1) and excess ROH (R = CH2CH2NMe2 (2), CH(CH3)CH2NMe2 (3), C(CH3)2CH2OMe (4), CH2CH2OMe (5)) in toluene at room temperature. Compounds 2–5 were isolated as colourless oils. The side-products, [Ga(OCH2CH2NMe2)2Cl] (6), [Ga(OCH(…
Firstly, hydrotalcite (HT) was synthesized by the urea method. Then, sodium methyl allyl sulfonate (SMAS) was used as intercalation agent to prepare intercalated HT (SMAS–HT). Finally, a novel poly(acrylic-co-acrylamide)/HT nanocomposite superabsorbent was prepared by inverse suspension polymerization, using N,N′-meth…
Purpose: In the following paper there have been the properties of the MCMgAl12Zn1, MCMgAl9Zn1, MCMgAl6Zn1, MCMgAl3Zn1magnesium cast alloy as-cast state and after a heat treatment presented. Design/methodology/approach: A casting cycle of alloys has been carried out in an induction crucible furnace using a protective s…
El grafeno es un nuevo material nanometrico bidimensional, obtenido en 2004 por exfoliacion micrometrica del grafito. Es una hojuela cuasiplana con pequenas ondulaciones, dando la apariencia de un panal de abejas, con un grosor de un atomo de carbono (0.1nm). Su produccion esta, hasta hoy, restringida a nivel laborato…
We present a study of the magnetic properties of a mixed ferro-ferrimagnetic ternary alloy of the type AB p C 1-p on a cubic lattice consisting of three different Ising spins S A = 3 2 , S B = 2, and S C = 5 2 . We employ the meanfield approximation and Monte Carlo simulation to find the compensation temperatures of t…
amine-functionalized 我酣睡的硅石材料经由 tetraethoxysilane 的合作冷凝作用反应和 organoalkoxysilanes 的三种类型被准备：3-aminopropyl-trimethoxysilane， n-(2-aminoethyl )-3-aminopropyltrimethoxysilane, 和 3-(2-(2- aminoehtylamino ) 乙醇氨基) propyl-trimethoxysilane。Cetyltrimethylammonium 溴化物作为一个模板被使用形成毛孔。amine-functionalized 的比表面积和毛孔体积我酣睡的硅石材料用表面区域和毛孔尺寸…
Abstract Thermal induced spin transitions between low- and high-spin states of Fe(II) complexes are commonly observed in the solid state. Cooperative effects, such as abrupt and two-step spin crossover, are typical for these objects and arise from intermolecular interactions described by several formalisms. These phen…
Spherical gold nanoparticles (3-5 nm) undergo a surprising fragmentation without extra energy input and are converted into ultrasmall particles (less than 1.5 nm), which is a direct result of electron transfer between gold nanoparticles and cysteine.
The development of reference materials for toxicology and metrology is a critical component in establishing testing strategies and methods for human health hazard assessment of nanoparticles. A UK-based project (REFNANO) employed a workshop-based process to identify a priority list of candidate reference materials to…
The electronic structures of SrCu2O2 and PbCu2O2 have been studied by density functional theory calculations in conjunction with high resolution X-ray photoemission spectroscopy (XPS) and electron paramagnetic resonance spectroscopy (EPR). In both materials there is linear O–Cu–O coordination and a band of Cu 3d state…
The synthesis and characterization of bent-core liquid crystals which incorporate TTF groups is reported; different bent-core mesophases are induced depending on the molecular structure and properties derived from their compact packing have been studied.
We study the wetting behavior of water droplets on superhydrophobic arrays of lithographically fabricated square posts. To determine the droplet wetting state, we measure static contact angles and compare the results to predictions for equilibrium Cassie and Wenzel states. Surprisingly, we find that roll-off angles ar…
Vertically aligned ZnO nanowires with controllable density were successfully synthesized by nanoparticle-assisted pulsed-laser deposition (NAPLD), by which nanoparticles formed in the gas phase by the condensation of the ablated species are transported onto the substrate, and nanoparticles play an important role in de…
The present work studies the effects of the diameter of carbon nanotube (CNT) as well as CNT weight fraction on the uniaxial stress‐strain behavior, stiffness, and strength of CNT‐reinforced epoxy‐matrix composites. The experimental results show that average Young′s moduli of 5 wt%‐CNT/epoxy composites with a CNT diam…
We report the fabrication of novel hollow particles, with a hole engineered in the shell, via a coacervation technique. These particles are termed colloidal buckets. Two sets of conditions were explored: (i) lowering the operating temperature to reduce the solvent evaporation rate, and (ii) incorporation of a third co…
Modeling of corrosion pit chemistry in applied polarization mode is carried out using finite element method calculations. The results lead to the formulation of critical conditions for pit stabilization in terms of the pit geometry and the applied potential. More detailed computing is performed to compare the behavior…
By using solid state reaction method we have fabricated the hole doped $La_{1-x}Sr_xFeAsO$ superconductors with Sr content up to 0.13. It is found that the sharp anomaly at about 150 K and the low temperature upturn of resistivity are suppressed by doping holes into the parent phase. Interestingly both the superconduc…
Fabrication of display products by low cost printing technologies such as ink jet, gravure offset lithography and flexography requires solution processable semiconductors for the backplane electronics. The products will typically be of lower performance than polysilicon transistors, but comparable to amorphous silicon…