Materials Literature
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Ink-jet printing is an important process for placing active electronics on plastic substrates. We demonstrate ink-jet printing as a viable method for large area fabrication of carbon nanotube (CNT) thin film transistors (TFTs). We investigate different routes for producing stable CNT solutions (“inks”). These consist…
Terahertz (THz) time-domain transmission spectroscopy was used to obtain the absorption coefficients and refractive indices of silica, Pyrex, and seven different Schott glasses. The refractive indices were analyzed using the Clausius–Mossotti equation, and the absorption coefficients in terms of the power-law model of…
To investigate the formation of one-dimensional CdS nanowires, we synthesized them by a solvothermal method in ethylenediamine as a single solvent at different temperatures and times. The sample synthesized at 160 °C for 72 h had an average diameter of ca . 50 nm and a length of ca . 3−4 μm and hexagonal phase with hi…
Employing density-functional calculations we study single and double graphene layers on Si- and C-terminated 1x1-6H-SiC surfaces. We show that, in contrast with earlier assumptions, the first carbon layer is covalently bonded to the substrate and cannot be responsible for the graphene-type electronic spectrum observed…
There is strong recent interest in ultrathin, flexible, safe energy storage devices to meet the various design and power needs of modern gadgets. To build such fully flexible and robust electrochemical devices, multiple components with specific electrochemical and interfacial properties need to be integrated into sing…
A new model of solution hardening in fcc metals assumes that dislocation motion is controlled by a thermal activation process. In the model, the interaction of a dislocation with plural solute atoms is taken into account in a single activation event. The actual number of solute atoms which are involved in an activatio…
Abstract High level of expanded graphite (EG) was melt‐blended with high‐density polyethylene to prepare electrical conducting masterbatch. Some factors such as processing temperature, EG contents, treating time were discussed for the effect on electrical and mechanical properties of composites. Results showed that EG…
This paper reports on luminescence properties of the 1 mol% Sm3 + (4f 5) and Dy3 + (4f9) doped optical glasses in the composition of: 65TeO2-12B2O3-12P2O5-10Li2O –1Sm2O3/1Dy2O3. The measured emission spectrum of Sm3 + glass has revealed four emission transitions at 558 nm (4G5/2→6H5/2), 595 nm (4G5/2→6H7/2), 641 nm (4…
We have measured magnetic minor hysteresis loops of neutron-irradiated Fe–Cu–Ni–Mn model alloys with variable combinations of Cu and Ni contents. It was revealed that minor-loop coefficients which are in proportion to internal stress decrease after neutron irradiation to a fluence of 0.44 × 1019 n cm−2 for all alloys.…
Grain boundary engineering methods improve materials properties by modifying the composition and connectivity of grain boundary networks. A quantitative understanding of grain boundary network characteristics and their impact on materials properties is therefore desirable for both scientific and practical purposes. In…
The classical fluid dynamics boundary condition of no slip suggests that variation in the wettability of a solid should not affect the flow of an adjacent liquid. However, experiments and molecular dynamics simulations indicate that this is not the case. In this paper we show how flow over a solid substrate with varia…
Abstract A series of soluble poly(amide‐imide)s (PAIs) bearing triethylammonium sulfonate groups were synthesized directly using trimellitic anhydride chloride (TMAC) polycondensation with sulfonated diamine such as 2,2′‐benzidinedisulfonic acid (BDSA), 4,4′‐diaminodiphenyl ether‐2,2′‐disulfonic acid (ODADS), and nons…
The grain growth of ZnO ceramics sintered with low additions of Sb 2 O 3 (<500 ppm of Sb) was investigated. Additions of Sb<250 ppm resulted in a coarse‐grained microstructure with large ZnO grains (55–70 μm), much larger than the grain size of ZnO ceramics without any Sb 2 O 3 addition (45 μm). The addition of…
Abstract Ferromagnetic full Heusler alloys containing Co are amongst the most studied half‐metallic systems. Several studies recently have been concentrated on the effect of defects and impurities. We focus in this Letter on the case of vacancies in these alloys. We show that the occurrence of vacancies at the sites o…
Parameters for orientational and inhomogeneous broadening are found from the line shape analysis of the Raman spectrum of the glass former alpha-picoline during cooling from low-viscous to glassy state. The orientational phase loss time tau(OPL), extracted from the analysis, coincides with the alpha relaxation time at…
Size-dependent phase transition of nanosize diamond particles (NDPs) to graphite was found in the course of studies of high pressure high temperature (HPHT) induced transformations of NDPs at 8 GPa and in the temperature range of 873−1623 K. Analysis of the products of HPHT treatment of powder NDPs (with the mean size…
All-electron calculations based on density functional theory have been carried out to study the electronic structures of single-walled nanotubes with subnanometer diameters. Present studies suggest the need for performing all-electron calculations, specifically for the nanotubes with very small diameters. Complete geo…
One-at-a-time stereochemistry: AsS bond-making and bond-breaking reactions are important in pharmacology, toxicology, and cell biology. The aqueous covalent chemistry of individual AsIII molecules can be monitored inside a protein nanoreactor. The approach is used to follow the creation of a chiral center at AsIII, t…
The synthesis of the first pi-extended tetrathiafulvalene (TTF) ligand featuring a furanoquinonoid spacer and pyridyl functional groups is described. This compound shows an unprecedented electrochemical sensing behavior and excellent coordinating properties toward selected divalent metal ions. Solid-state structures o…
The system constituted by the $\mathrm{Si}(001)\text{\ensuremath{-}}2\ifmmode\times\else\texttimes\fi{}1$ surface exposed to water molecules at room temperature has been chosen to single out the electron structure of the hydroxyl SiOH, a surface species playing an important role in many technologically relevant proces…