Materials Literature
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Currently, graphene is a topic of very active research in fields from science to potential applications. For various radio-frequency (RF) circuit applications including low-noise amplifiers, the unique ambipolar nature of graphene field-effect transistors can be utilized for high-performance frequency multipliers, mix…
Using first-principles calculations, we consider the bond between thiolate and small Au clusters, with particular emphasis on the resulting magnetic moment. The moment of pure gold clusters is 1 mu(B) for clusters with an odd number of Au atoms and zero for those with an even number. The addition of the thiolate, havi…
Abstract Nickel catalysts supported on ZrO 2 , TiO 2 and ZrO 2 /TiO 2 mixtures performed more active, selective and stable than Ni/SiO 2 catalysts in the hydrogenation of glucose to sorbitol. This was shown by catalytic testing as well as by determination of Ni crystallite size before and after the test. The reason fo…
High-energy mechanical action applied to solid leads to destruction and diminution to the nanosize level. But on the other hand, it can induce structural changes at the nanoscale and at the atomic level which can result in novel materials properties. In this contribution, case studies will be presented concerned with…
The effects of rice husk powder (RHP) loading and two types of natural rubber matrix (SMR L and ENR 50) on curing characteristics and mechanical properties were studied. The scorch time and cure time decreased with increasing RHP loading whereas maximum torque showed an increasing trend. SMR L composites possessed lon…
Abstract A novel curing agent, poly (amide‐amidic acid) (PAA), was used to cure tetraglycidyl 4,4′‐diaminodiphenylmethane (TGDDM). The initial cure and exothermic peak temperatures increased with increase in PAA content. The mechanism for the cure of TGDDM/PAA was proposed which involved, besides TGDDM cure, PAA imidi…
The effect of chemical blowing agent on the cell morphology and long-term water absorption and thickness swelling of composites based on high-density polyethylene/rice husk flour were studied in this research. Composite materials containing high-density polyethylene, rice husk flour, chemical blowing agent and couplin…
The ASME AS-240TP-316L stainless steel in the form of a sheet 3 mm in thickness and the ASTM SA-516 grade 60N steel substrate are joined by explosion cladding. The objective of this paper is to evaluate the electrochemical behaviour of a cladding plate of carbon–manganese steel and stainless steel 316L when compared t…
A new designed core tester and its feeding and control devices are presented in this paper. With this workbench, mounted single phase induction motor stators can be magnetically fed with controlled induction waveforms in order to evaluate their quality in the industrial environment. As the measured data involves the m…
The incorporation of room-temperature red-emissive [Ru(II)(dqp)(dqp-CH(2) OH)](2+) (dqp is 2,6-di(quinolin-8-yl)pyridine) in poly(ε-caprolactone) (PCL) is explored following two routes. First, the ring-opening polymerization of ε-caprolactone is investigated using the free ligand and the complex as initiators. Alterna…
When carbon steel is subjected to atmospheric corrosion, the surface texture of the base metal becomes rougher due to corrosion attack. In this study, three-dimensional surface roughness analysis of the base metal of carbon steel samples exposed outdoors was performed to investigate this aspect of atmospheric corrosio…
Abstract The bond valence sums (BVS) of the constituent atoms of three series of mullite-type compounds PbMn x Al 1– x BO 4 , PbFe x Al 1– x BO 4 and PbMn x Fe 1– x BO 4 ( x = 0 – 1) were analyzed with particular emphasis on lead. While the formal BVS of one bridging oxygen atom in the edge-sharing MO 6 octahedron was…
Superconductivity variations deduced from the x-ray diffraction and the magnetic and heat-capacity measurements in the pseudoternary Sr(Pd${}_{1\ensuremath{-}x}{T}_{x}$)${}_{2}$Ge${}_{2}$ layer system [Pd($4{d}^{8}$), $T$ $=$ Co($3{d}^{7}$), Ni($3{d}^{8}$), or Rh($4{d}^{7}$); $0\ensuremath{\leqslant}x\ensuremath{\leqs…
Photoinduced electron transfer was studied in self-assembled donor-acceptor dyads, formed by axial coordination of pyridine appended with naphthalenediimide (NDI) to zinc naphthalocyanine (ZnNc). The NDI-py:ZnNc (1) and NDI(CH(2))(2)-py:ZnNc (2) self-assembled dyads absorb light over a wide region of the UV/Vis/near i…
In this paper, we have employed a novel method to realize magnetic property from an organic polymer. An antiferromagnetic, inorganic material Cr2O3 added with a well promising Polyaniline was synthesized and the effect of Cr2O3 and its concentration on the properties of polyaniline was investigated. Cr2O3/PANi was syn…
A simple method to fabricate low-scattering holographic polymer-dispersed liquid crystal grating is proposed. The optical efficiencies of the grating are tested. The results show that the scattering losses are almost totally suppressed, at less than 0.25%, and the diffraction efficiency of the grating reaches as high…
A novel strategy for the simultaneous reduction and functionalization of graphene oxide (G-O) was developed using polyallylamine hydrochloride (PAAH) as a multi-functional agent. The G-O functionalization by PAAH was carried out under basic conditions to catalyze the epoxide ring opening reaction of G-O with abundant…
Abstract A series of polysulfone/phenyl trisilanol POSS nanocomposites were produced by melt blending by twin screw batch mixing. These materials were then injection molded, and their thermal, mechanical, and morphological properties were tested. The tensile properties of polysulfone were moderately compromised by the…
The effect of phosphate on the tribocorrosion of aluminium D16T (AA 2024 equivalent) alloy in synthetic acid rain was studied. It was established that an extract of modified zinc phosphate increases the resistance of aluminium alloy to corrosion and mechanical wear, which is confirmed by the reductions in its polarisa…
Abstract The synthesis of magnetic core–shell nanoparticles consisting of magnetite cores surface‐functionalized by glycolic acid covered by polylactic acid was performed by applying the “grafting‐from” strategy, where the polymerization is initiated from the particle surface. The surface initiated ring‐opening polyme…