Materials Literature
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A rapid, straight-forward method for the preparation of silver colloidal solutions of various colours has been developed. This is based on the reduction of silver ions by ascorbic acid in the presence of citrate-stabilized silver seeds, additional trisodium citrate and a polymer such as polyvinylpyrrolidone. The colou…
This paper describes a single step procedure by which primary amine groups are anchored onto ordered mesoporous carbon in a one step reaction. Ordered carbon materials with functional groups residing at the pore surface are prepared using SBA-15 silica as template in combination with hydrothermal carbonisation at mild…
Diamond thin films have outstanding optical, electrical, mechanical and thermal properties, which make these attractive for applications in a variety of current and future systems. In particular, the wide band gap, optical transparency and unusually high thermal conductivity of diamond thin films make them an ideal se…
Sulfur dioxide reactions with calcium carbonate interfaces at 296 K in the presence and absence of adsorbed water result in the formation of adsorbed sulfite and sulfate. The extent of reaction is significantly enhanced, approximately five- to ten-fold for particulate and single crystal CaCO(3) (calcite), respectively…
In this initial study the electrochemically active region of a (LSCF) cathode was reconstructed in three dimensions using a focused ion beam/scanning electron microscope. The reconstructed volume totaled from the free air surface to the dense yttria-stabilized zirconia electrolyte interface. Various microstructural pr…
The formation of CaCO3 is usually discussed within the classical picture of crystallization, i.e. assuming that the formation of CaCO3 crystals proceeds via nucleation and growth. This may be true for the case of low supersaturation. In this work it is shown that the formation process is far more complex at high super…
We investigate the concentration and size dependent self-assembly of cadmium selenide nanoparticles at an oil/water interface. Using a pendant drop tensiometer, we monitor the assembly kinetics and evaluate the effective diffusion coefficients following changes in the interfacial tension for the early and late stages…
Here we report for the first time on the functionalization of hexagonally ordered mesoporous carbon through a simple oxidation using ammonium persulfate solution (APS). The degree of functionalization can be easily controlled by the simple adjustment of the oxidation parameters such as oxidation time, APS concentratio…
Near-infrared metamaterials that possess a reconfigurable index of refraction from negative through zero to positive values are presented. Reconfigurability is achieved by cladding thin layers of liquid crystal both as a superstrate and a substrate on an established negative-index metamaterial, and adjusting the permi…
Geometry-induced current and potential distributions modify the global impedance response of a disk electrode subject to faradaic reactions. The problem was treated for both linear and Tafel kinetic regimes. The apparent capacity of a disk electrode embedded in an insulating plane was shown to vary considerably with f…
This Feature Article summarizes the design and synthesis of supramolecular hydrogels based on nanofibers of self-assembled small bioactive molecules. The hydrogels show responses to molecular recognition and find applications in wound healing, toxin removal, and drug release. We also described our recent results of us…
A new treating method using sodium hydroxide (NaOH) and Maleic anhydride-grafted polypropylene (MPP) emulsion was introduced to treat jute fiber mat in order to enhance the performance of jute/polypropylene (PP) composite prepared by film stacking method. The surface modifications of jute fiber mat have been found to…
The hydrothermal reactions of [A-alpha-SiW(9)O(34)](10-)/[A-alpha-PW(9)O(34)](9-) with NiCl(2) x 6H(2)O and amines yielded four unprecedented hybrid high-nuclear Ni-subsituted polyoxotungstates.
There would be significant advantages to having anodes for solid oxide fuel cells (SOFCs) that were capable of directly utilizing hydrocarbon fuels. Because conventional Ni-based anodes catalyze the formation of carbon fibers, new anode compositions are required for this application, but most of the materials that hav…
Biodegradable elastomers have a number of potential applications in the biomedical area, especially in the emerging field of soft-tissue engineering where the mechanical properties of the polymer scaffold should match those of the tissue to be grown. An increasing number of synthesis strategies have been employed in o…
Amorphous calcium carbonate (ACC) was synthesised in the presence of the additives magnesium and poly(aspartic acid) (pAsp) and the structure and crystallisation of these ACC samples was investigated using a range of techniques including X-Ray Absorption Spectroscopy (XAS), X-Ray Diffraction (XRD) and Infra-Red Spectr…
Tetrathiafulvalene (TTF) as the prototypical electron donor for solid-state (electronics) applications is converted to the unusual cation-radical salt, TTF+* CB- (where CB- is the non-coordinating closo-dodecamethylcarboranate), for crystallographic and spectral analyses. Near-IR studies establish the spontaneous self…
We present a study of protein adsorption on oligo(ethylene glycol) (OEG) self-assembled monolayers (SAMs) at a range of OEG surface densities. OEG SAMs were formed in mixed ethanol and water solutions at different assembly temperatures to adjust the packing density of EG4-SAMs. These SAMs were characterized using X-ra…
Nearly monodisperse magnetite nanoparticles with sizes less than 10 nm have been successfully deposited on multi-walled carbon nanotubes (MWNTs) by in situ high-temperature decomposition of the precursor iron(III) acetylacetonate and MWNTs in polyol solution. The effects of the concentration of the iron precursor on t…
The objective of the present study is to investigate the possibility of preparing pure protein microspheres from regenerated silk fibroin (RSF). It is found that RSF microspheres, with predictable and controllable sizes ranging from 0.2 to 1.5 µm, can be prepared mild self-assembling of silk fibroin molecular chains.…