Materials Literature
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Biologically conjugated quantum dots (QDs) have shown great promise as multiwavelength fluorescent labels for on-chip bioassays and eukaryotic cells. However, use of these photoluminescent nanocrystals in bacteria has not previously been reported, and their large size (3 to 10 nm) makes it unclear whether they inhibit…
This paper reports the tunability of a two-component gel system based on dendritic l-lysine with a focal point carboxylic acid group and aliphatic diamines. The microscopic structure and macroscopic properties of the gel can be modulated by changing the concentration of the components, altering their molecular structu…
Interactions among electronic spins, charges, and orbitals account for a rich variety of patterns in some oxides, and—with the advent of new crystal-growth technologies—may form the basis for a new type of electronics.
A systematic series of ITO electrodes modified chemically with self-assembled monolayers (SAMs) of porphyrins and porphyrin-fullerene dyads have been designed to provide valuable insight into the development of artificial photosynthetic devices. First the ITO and gold electrodes modified chemically with SAMs of porphy…
Metabolic engineering is a powerful method to improve, redirect, or generate new metabolic reactions or whole pathways in microorganisms. Here we describe the engineering of a Saccharomyces cerevisiae strain able to utilize the pentose sugar L-arabinose for growth and to ferment it to ethanol. Expanding the substrate…
A model of iron carbonate (FeCO3) film growth is proposed, which is an extension of the recent mechanistic model of carbon dioxide (CO2) corrosion by Nesic, et al. In the present model, the film growth occurs by precipitation of iron carbonate once saturation is exceeded. The kinetics of precipitation is dependent on…
BACKGROUND: There is a growing literature regarding sclerotic and panniculitic cutaneous conditions seen in patients with end-stage renal disease (eg, calciphylaxis and soft tissue calcification). Nephrogenic fibrosing dermopathy (NFD) is a recent designation to describe cutaneous findings in patients with end-stage r…
Different morphosynthesis strategies for various metal carbonate minerals such as CaCO3, BaCO3, CdCO3, MnCO3, and PbCO3 using double hydrophilic block copolymers (DHBCs) as crystal modifiers are presented. The influence of the DHBCs with different functionalities such as carboxyl, partially phosphonated, and phosphory…
Fe K-edge X-ray absorption near edge structure (XANES) spectra were recorded for a series of anorthite-diopside eutectic glasses containing 1 wt% 57 Fe 2 O 3 quenched from melts equilibrated over a range of oxygen fugacities at 1409 °C. The Fe 3+ /ΣFe ratios were determined previously by 57 Fe Mössbauer spectroscopy a…
High quality CoPt(3) nanocrystals were synthesized via simultaneous reduction of platinum acetylacetonate and thermodecomposition of cobalt carbonyl in the presence of 1-adamantanecarboxylic acid and hexadecylamine as stabilizing agents. The high flexibility and reproducibility of the synthesis allows us to consider C…
Abstract The barrier solutions presently available on the market all have their drawbacks, e.g. cost, water‐sensitivity, opacity or perceived environmental bad‐will. At the same time there is a trend to use more plastic‐based packaging materials for different applications, e.g. as replacements for metal and glass cont…
The properties of the bactericidal action of silver zeolite as affected by inorganic salts and ion chelators were similar to those of silver nitrate. The results suggest that the contact of the bacterial cell with silver zeolite, the consequent transfer of silver ion to the cell, and the generation of reactive oxygen…
Abstract Up until approximately 80 years ago, only black‐body radiation (including natural sources) was available to illuminate our environment. To realise state‐of‐the‐art lamps, TV sets, monitors, and medical scanners, took an enormous scientific and technical effort. Inorganic luminescent materials are key componen…
We have developed a method to separate metallic from semiconducting single-walled carbon nanotubes from suspension using alternating current dielectrophoresis. Our method takes advantage of the difference of the relative dielectric constants of the two species with respect to the solvent, resulting in an opposite move…
The role of local materials modification to field emission (FE) from diamond is studied. FE properties of a boron-doped hydrogenated diamond film containing an array of sp2 rich channels that extend from surface to substrate and of diamond films subjected to an electric discharge are reported. Whereas the implantation…
Doping of diamond by substitutional insertion of metallic species or production of diamond/metals nanocomposite layers has been obtained by a hybrid chemical vapor deposition based technique. The potential of such an approach makes it possible to obtain a wide class of purposely designed diamond-based structures chara…
We present preliminary results on a microfabrication approach to enable the integration of high yield, uniform, and preferential growth of vertically aligned carbon nanotubes (VACNTs) on low-stress micromechanical structures using a combination of “electron-beam crosslinked” poly(methylmethacrylate) surface nanomachin…
The formation of a surface relief grating (SRG) on polymer films containing azobenzene moieties has been inspected during exposure with counter-rotating circularly polarized light of λwrite=488 nm by probing the diffracting efficiency of a second low power laser. In particular, the growing SRG was observed at films of…
The adsorption of imidacloprid [1-(6-chloro-3-pyridinylmethyl)-N-nitroimidazolidin-2-ylideneamine] on heat-treated kerolite samples at 110 degrees C (K-110), 200 degrees C (K-200), 400 degrees C (K-400) and 600 degrees C (K-600) from pure water solution at 25 degrees C has been studied. The evolution of the surface pr…
We predict a two-dimensional splay-bend periodic deformation in a nematic slab with homeotropic boundary conditions. The nematic director modulation is induced by surface contributions in the elastic energy, which are linear in the deformation tensor. The instability appears only if the surface anchoring energy streng…