Materials Literature
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The structure of ribose 5-phosphate isomerase from the probiotic bacterium Lactobacillus salivarius UCC188 has been determined at 1.72 Å resolution. The structure was solved by molecular replacement, which identified the functional homodimer in the asymmetric unit. Despite only showing 57% sequence identity to its clo…
Abstract The micro‐/nanoscopic structure of the hybrid organic‐inorganic materials, based on polyether chains covalently linked to a silica framework through urea bridges, referred as ureasilicates or ureasils, and As2S3‐ureasil composites with ion‐implanted Ag nanoparticles is investigated. The formation of Ag nanopa…
Abstract In this work, both hexene copolymerized polyethylene of TR‐571 and homopolymerized polyethylene of 5000s were ram extruded using a temperature window effect. The rheological results show that the extrusion pressures abruptly drops at very narrow extrusion temperature windows for the two types of polyethylenes…
Abstract The determination of electronic states of single-walled carbon nanotubes (SWNTs) has been a central issue in science and nanotechnology of carbon nanotubes. Previously, we reported the electronic states of (n,m)SWNTs that were embedded in an anionic polymer, carboxymethylcellulose sodium salt (CMC). It is imp…
In this study, an attempt was made to prepare novel D-glucosamine hydrochloride-rectorite (DGH-REC) nanocomposites with improved antioxidant and anti-ultraviolet activity via the solution-intercalation method. The structure and morphology of DGH-REC nanocomposites were characterized by XRD, TEM, (13)C CP/MAS NMR, FT-I…
We present molecular dynamics (MD) simulations results for dense fluids of ultrasoft, fully penetrable particles. These are a binary mixture and a polydisperse system of particles interacting via the generalized exponential model, which is known to yield cluster crystal phases for the corresponding monodisperse system…
Nearly monodisperse Au nanorods (NRs) with different aspect ratios were separated from home-synthesized polydisperse samples using a gradient centrifugation method. The morphology, size and its distribution, and photo-absorption property were analyzed by transmission electron microscopy, atomic force microscopy and UV…
The differences of possible ferroelectric behavior and magnetic exchange interaction between Bi2NiMnO6 and La2NiMnO6 have been investigated by first-principles calculation. Paying attention to the electronic structures, bonding interaction, and Born effective charges of the two compounds, the calculations reveal that…
Abstract A series of new potassium and rubidium sulfido ferrates were synthesized from iron and sulfur using elemental potassium and Rb 2 S as alkali element sources. The structures of all title compounds were determined by means of single‐crystal X‐ray data. Isolated ortho anions [Fe III S 4 ] 5– , together with disu…
Abstract The oxalic amidine N,N′‐dimethyl‐N,N′‐diphenyl‐1,2‐bis[4‐tolylimino]ethane‐1,2‐diamine was used to synthesise a chloridozinc complex and two monoprotonated species either with chloride or triflate counterions. The compounds have been structurally characterised by X‐ray crystallography. Proton affinities have…
Silicon nanotip arrays exhibit a wide variety of interesting optical and electronic properties associated with their dimensionality. We here investigate the effect of size‐induced changes on phonon localization and explain the enhanced Raman response. The occurrence of normally forbidden transitions in the photolumine…
Since the term “spintronics” was conceived in 1996, there have been several directions taken to develop new semiconductor-based magnetic materials for device applications using spin, or spin and charge, as the operational paradigm. Anticipating their integration into mature semiconductor technologies, one direction is…
The screened hybrid approximation (HSE) of density functional theory (DFT) is used to examine the structural, optical, and electronic properties of the high temperature phase, cubic UC(2). This phase contains C(2) units with a computed C-C distance of 1.443 Å which is in the range of a CC double bond; U is formally 4+…
The composite of multiwalled carbon nanotubes (MWCNTs) decorated with ZrO(2) nanoparticles, synthesized by a grafting method followed by high-temperature annealing, was studied. The oxygen functionalized MWCNT surface uniformly disperses and stabilizes the oxide nanoparticles to an extent that is controlled by the met…
Side group exchange reactions have been studied for linear high polymeric organophosphazenes, [N═P(OR 2 )] n ( n ∼ 15 000). Specifically, the exchange behavior of polymers was examined where OR = OCH 2 CF 3, OCH 2 CF 2 CF 2 CF 2 CF 2 H, OCH 2 Cl 3, OC 6 H 4 CHO- p, OC 6 H 4 CN- p, and OC 6 H 4 NO 2 - p with sodium tri…
Photocatalytic soot oxidation is studied on P25 TiO(2) as an important model reaction for self-cleaning processes by means of electron paramagnetic resonance (EPR) and Fourier transform infrared (FTIR) spectroscopy. Contacting of carbon black with P25 leads on the one hand to a reduction of the local dioxygen concentr…
BACKGROUND: Rapid increase in multi-walled carbon nanotube (MWCNT) production for their industrial and biomedical applications has led to concerns over the effects of MWCNTs on human health and the environment. Both animal and in vitro studies have provided important findings about MWCNT-induced effects on the lung ce…
The radii R of the area wetted by precursor films spreading from small droplets of polymer liquids are found to vary as R ~ t(ν) with ν = 0.31-0.42, in contradiction to the 0.5 exponent indicated in previous studies. The experiments reported here are for three of the same polymer liquids used in the previous studies-m…
In this work, we studied ac responses of T-stub structures that are composed of armchair and zigzag graphene ribbons. Compared with uniform graphene ribbons, the T-stub structures show extraordinary properties. The ac responses of armchair and zigzag T-stub structures show different behaviors for different edge config…
Graphene is a carbon sheet one atom thick, consisting of a two-dimensional honeycomb lattice, which is considered to be the thinnest material in the world.1,2 It is generally viewed as the basic unit for other carbon materials. Figure 1.1 shows that graphene can become 3D graphite, 1D carbon nanotub...