Materials Literature
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A novel water-soluble cationic conjugated polymer, poly({2,5-bis[3-(N,N-diethylamino)-1-oxapropyl]-para-phenylenevinylene}-alt-para-phenylenevinylene) dibromide, was synthesized and used to develop a simple label-free DNA detection essay.
The synthesis and characterisation of a soluble poly(fluorenone) is presented, a polymer with high electron affinity with potential for use in plastic electronic devices as an n-type material.
Abstract Isothermal crystallization of poly(tetramethylene ether glycol) (PTMEG) with relatively low molecular weight ( M n = 991, 2004 and 2864, respectively) was investigated by differential scanning calorimetry, and the equilibrium melting temperature ( T ) determined using the Hoffman–Weeks analysis. The crystalli…
The new sugar-based gelators 1 and 2 were synthesized, and their gelation abilities were evaluated in organic solvents and in water. Compound 1 gelates both water and organic solvents whereas 2 gelates only organic solvents. Superstructural difference between hydrogel 1 and organogel 2 was investigated by CD, TEM, AFM…
A resonant grating mirror comprising a multilayer submirror and a grating slab waveguide submirror exhibiting constructive mutual reflection is shown experimentally to provide zero transmission. Its reflection line width of less than 1 nm, its polarization selectivity and low overall loss make the device usable as a l…
An implicit objective stress update algorithm is proposed for a hypoelastic–viscoplastic model. A thermal/dynamic yield function, which is derived based on the thermal activation analysis and dislocation interaction mechanisms, is used, along with the Consistency approach and the framework of additive viscoplasticity,…
The transient response during resistance switching in Ag∕Pr0.7Ca0.3MnO3∕Pt thin films is investigated by measurements using pulsed voltage biases. Semiconducting Pr0.7Ca0.3MnO3 (PCMO) films sandwiched by Ag and Pt electrodes show nonvolatile resistance switching (two orders of magnitude) as a result of applying pulsed…
We review structures for microwave and optical range containing 'left-handed' metamaterials - artificial composites with simultaneously negative effective permittivity and permeability which achieve negative values of refractive index. Attention has been given to the fundamentals of negative index materials, the main…
The great progress made in defining the structure of protein and peptide amyloid assemblies, particularly the arrangement of peptides in beta-sheets, is counterbalanced by the still poor understanding of the higher organization of beta-sheets within the fibril and overall fibril/fibril associations. The assembly pathw…
The synthesis, in one-pot, of an intimate composite material that simultaneously possesses ordered mesostructured MSU-SBEA and well-defined zeolite Beta (*BEA) material over micron-scale domains is described. The synthesis is a simple solution-based two-step reaction that is a modification of the Al-MSU-SBEA system an…
We have studied the electronic structure of the ferromagnetic double perovskites Sr2CrReO6, Sr2CrWO6 and Ba2FeReO6 by means of a full-potential linear muffin-tin orbital density-functional method. ...
When nanorods of Au, Ag and some other elements are aligned with a preferred orientation with respect to light, their optical extinction characteristics become dependent on the polarization and angle of incidence of the light. This effect is explored here and it is shown that it could potentially be exploited to produ…
Materials with high spin polarization at the Fermi energy (EF) are searched by the systematic band calculation for Heusler alloys X2YZ. It is shown that materials with high density-of-state (DOS) for the majority-spin state at the EF tend to maintain high spin polarization against chemical disorder. Such materials are…
This paper describes the influence of the chemical mechanical polishing (CMP) process on the degradation in the leakage currents and dielectric constants of porous silica low- films. It is found that the leakage current and dielectric constant increased by post-CMP cleaning solution due to the increase of and bonds ac…
Reversibly-photoswitchable gold nanoparticles containing azobenzene and exhibiting a light response "virtually identical" to that of the free chromophore were achieved by self-assembling a host-guest inclusion complex between alpha-cyclodextrin and an azobenzene-terminated alkanethiol in an aqueous medium.
Ultra-fine fibers of poly(vinyl alcohol)/polyethylenimine (PVA/PEI) were prepared by electrospinning of their blend solutions in water. Effects of PVA/PEI mass ratio and the polymer concentration on the fiber morphology were discussed by analysis of scanning electron micrographs. Results showed that uniform ultra-fine…
The charge transport properties of individual, metallic nitrogen doped, single-walled carbon nanotubes are investigated. It is demonstrated that n-type conduction can be achieved by nitrogen doping. Evidence was obtained by appealing to electric-field effect measurements at ambient condition. n-type conduction is attr…
Reactive Powder Concrete (RPC) is a cementitious material consisting of cement, sand, silica fume, silica flour, superplastiser, water and high strength steel fibres. The material, developed by Bouygues the parent company of VSL, is marketed under the brand name of Ductal®. Production in Australia commenced in early 2…
Electrically conducting polymers described as a new class of 'synthetic metals' reached a high interest in the last years, confirmed by the 2000 Nobel Prize in chemistry for the discovery and development of conductive polymers (Alan J. Heeger, Alan G. MacDiarmid and Hideki Shirakawa). The most commonly studied classes…
We studied heat transfer along a silicon nanowire suspended between two thin-film heaters using a thermoreflectance imaging technique. The thermoreflectance imaging system achieved submicrometer spatial resolution and 0.1/spl deg/C temperature resolution using visible light. The temperature difference across the nanow…