Materials Literature
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The synthesis and photochemical characterization of bicomponent molecular switches based on covalently tethered dithienylethene photochromes is described. Both photochromic units undergo complete switching between the fully cyclised and fully non-cyclised states despite a significant level of electronic communication…
The corrosion behaviors of Ti and Ti-6Al-4V, Ti-6Al-7Nb, Ti-0.5Pt, Ti-6Al-4V-0.5Pt, and Ti-6Al-7Nb-0.5Pt alloys were examined using an electrochemical analyzer in artificial saliva containing 0.1 and 0.2% NaF at a pH of 4.0. The SEM observations revealed that the surfaces of the alloys containing 0.5 wt% Pt were not a…
We report the dimerization of a mono-ruthenium(III) substituted alpha-Keggin-type tungstosilicate [alpha-SiW(11)O(39)Ru(III)(H2O)](5-) to a micro-oxo-bridged dimer [{alpha-SiW(11)O(39)Ru(m)}2O](n-) (m = III, n = 12; m = IV/III, n = 11; m = IV, n = 10). Single crystal X-ray structure analysis of Rb(10)[{alpha-SiW(11)O(…
A simple electrochemical method is presented to remove the bottom barrier layer of anodic aluminum oxide (AAO). In this method, an electrolysis process was performed in neutral solution with AAO as the cathode. By applying a suitable cathodic potential, electrolyte temperature, and electrolysis time, the bottom barrie…
Spinning disc processing (SDP) is an instantaneously scalable, continuous flow and high throughput flash nano-fabrication technology which embraces green chemistry metrics. It has been used to prepare silver nano-particles with remarkable control in size (5-200 nm), shape (spheroidal, acicular or agglomerate rosettes)…
The mechanism of lead-induced passivity-degradation in a nickel-based alloy (UNS N06690) was explored in a simulated stream generator alkaline crevice chemistry. The pitting induction test indicated that the detrimental impact of lead contamination on pitting resistance was significantly enhanced by the presence of ca…
The reactions of 2-pyridinealdoxime [(py)CHNOH] with Ni(ClO4)(2).6H2O in the presence of NaOH and NaN3 have led to Ni(II)14 and Ni(II)12Na2 clusters; the Ni14 compound is the biggest metal oxime cluster discovered to date, as well as the largest Ni azide cluster.
Deformation of AZ31 sheets during high-speed rolling at various temperatures was investigated. The thickness of 2.5 mm was reduced 60% by single-pass operation at a speed of 2000 m/min. Textures, microstructures, mechanical properties and bendability of the sheets processed were examined. In the sheets rolled at eleva…
The paper reports the synthesis and detailed characterization of two new Fe(II) compounds: [Fe(pyim)(2)(bpen)](ClO(4))(2).2C(2)H(5)OH (2) and [Fe(pyim)(2)(bpe)](ClO(4))(2).C(2)H(5)OH (3) (pyim = 2-(2-pyridyl)imidazole, bpen = 1,2-bis(4-pyridyl)ethane, and bpe = 1,2-bis(4-pyridyl)ethene). Both compounds and the earlier…
Multiwall carbon nanotube (MWNT) materials are attractive because they possess excellent thermal conductivity and mechanical properties. However, few reports exist that focus on improving the thermal conductivity of MWNT by combining it with a metal matrix. Thus to improve the thermal conductivity, a nickel-matrix com…
The syntheses of novel tetra{2,(3)-pyridyloxyphthalocyaninato} complexes of zinc, cadmium and mercury (TPyZnPc, TPyCdPc and TPyHgPc) are presented. Their spectral and photophysical properties (as well as those of their unsubstituted counterparts: ZnPc, CdPc and HgPc) are investigated. TPyZnPc and TPyCdPc are aggregate…
The surface of a material is the most important part determining the acceptance by and compatibility with the environment. In many cases, although the bulk properties are excellent for a specific application, the surface may require to be modified and engineered in the desired direction. This is especially important f…
Sugar cane molasses was found to be very effective for bacterial cellulose production. The components of sugar cane molasses, such as sucrose, fructose, glucose, nitrogenous compounds, non-nitrogenous acids, nucleic acids, vitamins, other carbohydrates, minerals and black color substance were added individually or in…
This paper presents an improved design method for a novel transformer inrush current reduction scheme. The scheme energizes each phase of a transformer in sequence and uses a neutral resistor to limit the inrush current. Although experimental and simulation results have demonstrated the effectiveness of the scheme, th…
The fundamental luminescence and chromaticity properties of a class of red-emitting phosphors Li Eu ( W O 4 ) 2 − x ( Mo O 4 ) x under near-UV excitation have been investigated. The photoluminescence (PL) and photoluminescence excitation (PLE) spectra reveal that the absorption is mainly attributed to O → Mo ( W ) cha…
The study was conducted to determine the mineral composition of cockle (Anadara granosa) shells from 3 major cockle cultivation sites in the West Coast of Malaysia. Three samples of cockle shells from three different sources were evaluated to determine the content of 12 macro- and micro-elements: Calcium (Ca), Carbon…
The ease with which water is released from cellulosic fiber material during the manufacturing of paper can affect both the production rate and the consumption of energy during the manufacturing process. Important theoretical contributions to dewatering phenomena have been based on flow through packed beds of uniformly…
Previously we demonstrated hierarchical self-assembly and mesoporosity in electrospun fibers using selected polystyrene--poly(4-vinylpyridine) (PS--P4VP) diblock copolymers with hydrogen-bonded 3--pentadecylphenol (PDP), which rendered distorted spherical P4VP(PDP) domains within the PS matrix, internal lamellar order…
Selective oxidation of styrene to acetophenone has been investigated for the first time over Pd–Au catalysts with H2O2 in CO2 medium. The influence of the support on the catalytic activity and the product selectivity was investigated, and Al2O3 support showed the best catalytic performance in this system. The presence…
Dual dc-rf plasma system has been used to deposit hydrogenated carbon nitride (CNx:H) films that exhibit high elastic recovery (75%). Transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectra and Raman spectra were subsequently used to study the microstructure and bonding of the resultant films…