Materials Literature
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A specific preparation procedure makes possible to obtain in one shot structural and compositional characterization of a buried interface at the nanometre scale using a micrometre scale probe. A specific example based on dispersive mu-XAS, micro X-ray absorption spectroscopy, shows that nearly-atomic scale changes in…
The depolymerization behavior of poly(ethylene terephthalate) (PET) to terephthalic acid (TPA) and ethylene glycol (EG) in high-temperature liquid water is examined in a batch reactor. PET is completely depolymerized in water for 10 min at 573 K. The total energy to obtain TPA and EG from a continuous PET depolymeriza…
The strain-dependent linear viscoelastic properties of several semidilute polyacrylamide-water solutions have been investigated by using our modified forced-oscillating torsion resonator. It is shown that these simple, semidilute uncross-linked flexible polymer aqueous solutions exhibit a strain softening behavior, as…
The influence of Cu-ion concentration in a concentrated electrolyte on the Cu removal rate and planarization efficiency (PE) of electrochemical mechanical planarization (ECMP) was investigated. With increasing Cu-ion concentration in the electrolyte, results show that the Cu removal rate significantly decreased becaus…
This paper looks into life extension of a group of transformers at Western Power transmission network. The transformers in question failed due to lack of enough clamping pressure on their windings which resulted in total failure of these transformers after close-in secondary faults.
A facile synthesis to fabricate HAp–titania scaffolds with different morphological features has been presented. The hydrothermal approach explored for HAp growth leads to the formation of HAp coating onto titania substrate with distinct morphological features such as cauliflower, urchin, porous nanofibres network, nan…
A dual function atomic force/near-field scanning optical microscope (AFM/NSOM) with an ultrafast laser excitation source was used to investigate apertureless, tip enhanced second-harmonic generation (SHG) of ZnO nanowires with spatial resolution below the optical diffraction limit. Single-wire SHG spectra show little…
A new synthesis of the fused macropolyhedral boron cluster B20H16 is described and its molecular structure in solution discussed, based on multi-nuclear NMR spectra, including COSY measurements, in relation to its previously elucidated solid-state structure. To verify the conclusions from the NMR study, experimentally…
This paper reports the synthesis and characterisation of a family of heterocyclic triethoxysilyl iodides of general formula, (EtO)3SiR2-N+R1, where R1 = –C5H11, –CH2C6H5 or –C16H33; N+ = pyrrolidinium or piperidinium; and R2 = –(CH2)3– and –(CH2)11– and their applications as organic iodide sources for use in dye sensi…
To elucidate mechanisms of arsenic toxicity and biological defense mechanisms against arsenic, we searched for genes that, when overexpressed, conferred arsenite resistance on yeast. Employing a Saccharomyces cerevisiae open reading frame (ORF) library, four genes associated with arsenite resistance, FAP7, MIG3, TMA19…
This paper experimentally investigates the machinability of Magnesium Metal Matrix Composites (Mg-MMCs) with high volume fractions of SiC nano-particles. Samples of Mg-MMCs with 5 Vol.%, 10 Vol.% and 15 Vol.% reinforcements of SiC nano-particles were studied and compared with pure Magnesium. Different feedrates and sp…
The aim of this research work was to investigate the mechanical properties and bioactivity of White Portland cement paste which added carbon nanotubes in order to improve compressive strength property. The current results found that enhanced compressive strength of white Portland cement paste was found when carbon nan…
The ability to control surface morphology at nano- and micrometre length scales is required in many applications. It has previously been demonstrated that surface wave patterns are spontaneously generated when heated, layered metal-on-silicone materials are cooled, because of the stress that builds up between two mate…
Chip MultiProcessor (CMP) architectures are dominant trend in parallel processing systems. With the number of on-chip processors rising to the hundreds, allocation and management of the processors are also important factor to achieve high efficiency of CMPs. In this paper, the authors study a Processor Allocator (PA)…
FePt(20 nm)/Cr(200 nm) bilayer films were deposited on 300°C-heated glass substrate in order to study the sputtering rate effect on ordering process and growth mechanism of FePt films. The sputtering rate of FePt layer ( R m ) was adjusted within the range from 0.1 to 2.0 nm/min.. X-ray results show a high order param…
We report a novel preparation method for nanocrystalline TiO2 networks with controlled pore sizes using spherical polyelectrolyte brushes (SPB) as templates. The SPB consists of a solid polystyrene core from which anionic polyelectrolytes are densely grafted. The SPB templates are synthesized via conventional photoemu…
The easy-to-make anion receptor 5,6-dihydrodiindolo[3,2-a:2′,3′-c]phenazine (DIPZ) was employed as a versatile building block for constructing anion complexes with spherical fluoride and bromide, Y-shaped acetate and benzoate, trigonal nitrate, tetrahedral hydrogen sulfate and dihydrogen phosphate, and octahedral hexa…
This paper describes insect-inspired wall-climbing robot that is capable of walking on a smooth vertical surface utilizing surface tension forces. The adhesion mechanism of the robot is inspired from the attachment system of ants, which is responsible for a thin film of secreted liquid between the adhesive organs and…
We present an extension to a constant-pressure molecular dynamics method for ellipsoidal finite systems that allows one to deal with nano-objects of cylindrical and cuboidal shapes. The method is based on the inclusion of a pressure x volume term in the system Lagrangian, where the volume is defined as a function of t…
Nitrogen addition to stainless steels is very effective for improving mechanical properties and corrosion resistance. N2 solution nitriding is one of the possible methods to produce high nitrogen stainless steel. However, the nitriding rate by N2 gas is significantly small and also the attainable nitrogen contents in…