Materials Literature
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We present strong evidence of Landau states formation in multiwalled carbon nanotubes with metallic or semiconducting outer shells, under magnetic fields as high as 60 T. Magnetoconductance data are found to converge to a gate-independent value for semiconducting shells, whereas for metallic shells, the Landau states…
The crystal structure of the ternary complex of NAD+-dependent formate dehydrogenase from the methylotrophic bacterium Moraxella sp. C-1 with the cofactor (NAD+) and the inhibitor (azide ion) was established at 1.1 A resolution. The complex mimics the structure of the transition state of the enzymatic reaction. The st…
The anomalous wear-out phenomena of Eu-implanted metal-oxide-semiconductor devices were investigated. It will be shown that in contrast to other rare earth elements the electroluminescence (EL) intensity of Eu-implanted SiO2 layers can rise under constant current injection before the known EL quenching will start. Und…
The doping-induced conductivity transitions in molecular layers of polyaniline have been studied by monitoring the correlated optical and spectroscopic changes using spectroscopic and single wavelength extinction ellipsometry, also in total internal reflection mode (TIRE), together with reflection spectrometry. The me…
We present density functional theory (DFT) and time-dependent DFT (TD-DFT) study of the structures and electronic spectra of small CdSe nanocluster-adenine complexes Cd(n)Se(n)-adenine (n = 3, 6, 10, 13). We examine the changes in the geometries and excitation spectra of the nanoclusters induced by DNA base-binding. B…
The interaction between a carbon nanotube (CNT) and a graphene sheet is investigated to describe the contact properties between a CNT atomic force microscope (AFM) tip and a graphite surface. The energy of the whole system is calculated using $\text{MM}+$ molecular mechanical modeling. With the numerical calculations,…
Zn(OH) 2 /ZnO nanosheet‐ZnO nanoarray hybrid structured films were fabricated on F‐doped SnO 2 ‐coated glass by a dissolution–recrystallization route without any additives. The as‐deposited c ‐axis‐oriented ZnO nanowhisker films were soaked in hot distilled water for various periods of time. X‐ray diffraction, field‐e…
Rod-coil oligomers consisting of tetraaniline and alkyl chains were synthesized and their self-assembly behavior was studied in their two different oxidation states, namely the leucoemeraldine base (LEB) and the emeraldine base (EB) states. In solutions of oligomers in the EB state, two positional isomers and cis/tran…
Nanopolar structures and local ferroelectricity of Sr0.61Ba0.39Nb2O6 relaxor crystal across Curie temperature have been investigated using piezoresponse force microscopy (PFM). The short-range nanopolar clusters are dominated by long-range ferroelectric order at room temperature, but exhibit themselves at higher tempe…
Aurivillus intergrowth Bi4Ti3O12–5BiFeO3 was demonstrated to be ferroelectric that evoked the possibility of achieving high temperature magnetoelectric property in this family of compounds. X-ray diffraction studies confirmed its structure to be orthorhombic [Fmm2; a=5.5061(11) Å, b=5.4857(7) Å, c=65.742(12) Å]. Howev…
The design of more efficient photochromes does not stand as the only challenge in the field of molecular switches; more complex and refined structures, allowing one to pave the way toward multiply addressable structures, are highly sought after. In this framework, compounds containing several dithienylethenes have bee…
A novel, nonfouling polymer brush, poly-N-[(2,3-dihydroxypropyl)acrylamide] (PDHPA), containing latent aldehyde groups, was synthesized by surface initiated atom transfer radical polymerization (SI-ATRP). The synthetic parameters were adjusted to produce brushes with varying graft densities and molecular weights. High…
We report the results of investigations on the anisotropic electrohydrodynamic states arising in a highly conducting, planarly aligned, bent-core nematic liquid crystal driven by ac fields of frequency f in the range from 10 Hz to 1 MHz. Pattern morphologywise, two f regimes are distinguished. The low-f regime, wherei…
The aggregation behavior of a novel histidine derivative surfactant N-dodecanoyl-L-histidine (DHis) in aqueous solution was investigated. By mixing with cationic/anionic surfactant, an interesting phase transition over time from transparent homogeneous solution to jelly and finally to fibrous floccules was observed wi…
This paper reports on the anisotropic thermal transport in highly ordered amorphous and anatase TiO2 nanotube arrays. Strong anisotropic thermal conductivity is observed: 0.617WK−1m−1 along the tube length direction and 0.077–0.102WK−1m−1 in the cross-tube direction for amorphous TiO2 nanotube arrays. The anatase TiO2…
Introduction: Objectives and Background.- The Soil Profile: The Structure of Plant - Mineral Interaction Space.- Physical Factors Affecting Soil Profiles: The Three Dimensional Aspect of Plant - Mineral Interaction: Displacements.- Clay Minerals in Soils: The Interface Between Plants and the Mineral World.- The Chemis…
A new eulytite-like orthophosphate Pb(3)Bi(PO(4))(3), was synthesized by the high temperature solution growth (HTSG) method and characterized by X-ray single crystal diffraction, powder diffraction and electron microscopy. It crystallizes in the acentric cubic space group (I4[combining macron]3d). The pure-phase powde…
Pure amorphous carbon (a-C) film and that with a small amount of Ti were deposited on high speed steel (W18Cr4V) substrates by means of dc closed field unbalanced magnetron sputtering. The chemical composition and microstructure of the a-C films were performed using x-ray photoelectron spectroscopy, x-ray diffraction,…
Modern metamaterials face functional constraints as they are commonly embedded in or deposited on dielectric materials. We provide a new solution by microfabricating a completely free-standing all-metal self-supported metamaterial. Using upright S-string architecture with the distinctive feature of metallic transverse…
The photoluminescence from semiconductor alloys is inhomogeneously broadened due to alloy disorder. We present a model to explain the so-called “S-shape” temperature dependence of peak position, taking into account recombination of free excitons and excitons bound to impurities. We find the following effects to contri…