Materials Literature
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Eine bakterielle Biofabrik: E.-coli-Stämme wurden genetisch verändert, um Phytochelatine (PCs) zur Modifizierung von Oberflächen zu produzieren; zudem wurden sie zur intrazellulären Synthese fluoreszenter, wasserlöslicher, PC-bedeckter CdS-Nanopartikel verwendet (siehe Bild). Die Größe der halbleitenden Nanokristalle…
We demonstrate optical polarization devices, consisting of gold nanowires, which are based on the strong polarization dependence of the particle plasmon resonance of the gold nanowires and the resonance of the waveguided grating structures. Using a layer of indium tin oxide underneath the gold nanowires as the wavegui…
Low-frequency noise of top-gated ambipolar carbon nanotube field effect transistors (CNT-FETs) with aligned CNT growth onto the quartz substrate is presented. The noise of top-gated CNT-FETs in air is lower than that of back-gated devices, and is comparable to that of back-gated devices in vacuum. It shows that molecu…
An experimental study of the heat capacity, mass density, magnetic-field-induced optical birefringence, linewidth and intensity of scattered light, and the viscosities associated with nematic order parameter fluctuations and fluid flow has been performed on an achiral bent-core liquid crystal above its clearing point…
The X-band electron paramagnetic resonance (EPR) technique and the model analysis of the EPR susceptibility versus temperature were employed to characterize the dopant distribution in a number of La-manganite crystals, low doped with Ca, Sr, and Ba in a La site. Such distribution appears to be inhomogeneous as a resul…
Abstract The experimental glow‐curve of Al 2 O 3 :C is highly disturbed due to the strong thermal quenching effect present in this material. Therefore, the real glow‐curve shape of this material is unknown. The present work describes an attempt to reconstruct the glow‐curve shape of Al 2 O 3 :C samples with different…
We present a density-functional theory investigation of the electronic and magnetic properties of a linear chain model of the antiferromagnetic ${\text{Cr}}_{8}$ molecular ring. The chain model system is characterized by a smaller size of the simulation cell needed to perform the calculations, with respect to the one…
Abstract The feasibility of applying single‐chamber solid oxide fuel cells (SC‐SOFCs) to power generators for exhaust energy recovery was investigated using both model and actual exhaust gases. In the experiments with model exhaust gases, a single cell, Ni‐Ce 0.8 Sm 0.2 O 1.9 /YSZ/La 0.8 Sr 0.2 MnO 3 , was operated in…
In this paper, we focus on critical issues directly related to the viability of carbon nanotube-based nanoelectromechanical switches, to perform their intended functionality as logic and memory elements, through assessment of typical performance parameters with reference to complementary metal-oxide-semiconductor devi…
Abstract Properties of recycled Poly(ethylene terephthalate) were greatly improved. Recycled PET was blended with LLDPE‐ g ‐MA by low‐temperature solid‐state extrusion. Mechanical properties of the blends were affected obviously by the added LLDPE‐ g ‐MA. Elongation at break reaches 352.8% when the blend contains 10 w…
We present a detailed theoretical study of the electronic transport properties of monolayer graphene. The quantum and transport conductivities are calculated on the basis of the usual momentum-balance equation derived from a semiclassical Boltzmann equation. We investigate carrier-impurity scattering in a massless Dir…
We present a light sensing device based on nearly spherical, defect free colloidal nanocrystals (NCs) of InAs acting as a light activated gate for a GaAs∕AlGaAs field effect semiconductor transistor. We use self-assembled organic monolayer as linkers that attach the InAs NCs to the surface of the semiconductor device,…
Rapid differentiation of endothelial progenitor cells (EPCs) into confluent mature endothelial cells is important in tissue engineering for the design of autologous, nonthrombotic, vascular grafts. A new method based on EPC culture on poly(sodium-4- styrene-sulfonate)/poly(allylamine hydrochloride), that is, polyelect…
We report dynamic Monte Carlo simulations of immiscible binary polymer blends, which exhibit weakly enhanced crystal nucleation near interfaces between two phase-separated polymers. We found that this enhancement is not accompanied by any preferred crystal orientation, implying its origin is mainly of enthalpic rather…
The interactions between a graphene sheet and an aluminium (111) layer in carbon-aluminium nanocomposite systems were investigated for various interfacial configurations using an ab initio simulation based on density functional theory. Dispersion relations and electron density distributions obtained for various interf…
Staying single: Individual, ultralong, single-crystalline Te nanotubes become unintentionally doped when synthesized by a chemical method. They show metallic character in the wide temperature rangeof 5–300 K (see graph), which issupported by first-principles density functional theory calculations. Nanodevicesare fabri…
Nitrogen ions were implanted into undoped melt grown ZnO single crystals. A light-emitting p-n junction was subsequently formed by postimplantation annealing in air. Deep level transient spectroscopy was used to investigate deep level defects induced by N+ implantation and the effect of air annealing. The N+ implantat…
We demonstrate a silica-nanoparticle-doped hybrid-aligned nematic device, which can be operated in the dynamic mode and the multistable mode. Under ac voltage excitation, the interfacial polarization effect between the homogeneously dispersed nanoparticles and the liquid crystal (LC) host reduces the dielectric relaxa…
A universal building block for the convergent synthesis of a wide variety of different T-shaped ternary amphiphiles was developed and used for the synthesis of a series of new liquid-crystalline materials composed of a rigid biphenyl core with polar glycerol groups at both ends and linear or branched alkyl chains in a…
Nanotechnology is a novel emerging technology that allows the manipulation of materials at the scale comparable to the size of a single molecule (i.e., < 100 nm). There have been many new developments in this technology, resulting in complex exposure and health risk implications. Nanotechnology offers major benefits t…