Materials Literature
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We have investigated chemical sensors by combining silicon-on-insulator complementary-metal-oxide-semiconducting microtechnology with nanotechnology. The sensing materials were single-walled carbon nanotubes and poly(3,3‴-dialkyl-quarterthiophone). The devices containing only nanotubes or pure polymer provided minimal…
A number of aqueous polyurethane dispersions based on polytetramethylene glycol (PTMG), 1,4-butanediol (1,4-BDO), dimethylol propionic acid (DMPA) and diisocyanates of differing structures such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI), and dicyclohexylmethane di…
Broadening of the angular response of two-dimensional (2D) guided mode resonant spectral filters at oblique incidence is investigated. Coupling into multiple fundamental guided resonant modes having the same propagation constant but propagating in different planes (inherent multiple-plane diffraction by 2D gratings) i…
The determination of the coercive voltage from the height of domain-switching current plateau in ferroelectric thin films provides the liability to estimate the coercive-voltage shift with imprint time shortly on the order of polarization-reversal time. The voltage shift exhibits a linear time dependence in a logarith…
Coimplantation of Zn and O ions into a single crystalline MgO and subsequent thermal annealing were applied in the synthesis of ZnO nanocrystals. Electron microscopy showed that rocksalt instead of wurtzite ZnO stabilizes for relatively large nanocrystals up to ∼15nm, resulting from its small lattice mismatch with MgO…
Ionic perylenemonoimide (see figure) forms crystals that exhibit dichroic absorption and anisotropic fluorescence emission in the visible light region. The self-organization of this compound on a micropatterned polymer template leads to the formation of anisotropic fluorescent materials in micropatterns.
To develop biomaterials for tissue engineering, a silk-like protein inspired by mussel-adhesive proteins (MAPs) was designed and prepared. The primary structure of this silk-like protein is designed as TS[AKPSYPPTYKAS (GAGAGS)(3)](10) by combining the sequences (GAGAGS)(3), the crystalline region of Bombyx mori silk f…
Using $\mathrm{O}\phantom{\rule{0.2em}{0ex}}1s$ x-ray photoelectron and Mg $K{L}_{23}{L}_{23}$ Auger spectroscopy, we demonstrate that monolayer $\mathrm{Mg}\mathrm{O}(100)∕\mathrm{Ag}(100)$ exposed at $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ to ${\mathrm{H}}_{2}\mathrm{O}$ vapor pressure of ${10}^{\ensuremath{-}8}\…
Abstract High power electronics are today a real challenge for large band gap materials. Devices as simple as switches have to work at ever higher powers and demand material with exceptional properties: in particular, a high breakdown voltage (at least a few 10 6 V/cm), a high mobility‐lifetime product (at least 10 –3…
The P – T phase diagram and transport properties of a layered organic superconductor, κ-(BEDT-TTF) 4 Hg 2.89 Br 8 , which can be viewed as a nealy half-filled band system, are reported. Through careful resistivity measurements under pressures of up to 4.5 GPa, we uncovered anomalous pressure dependence of T c of this…
The effect of axial strain on the performance of carbon-nanotube field-effect transistors with doped junctions is studied. When the diameter of carbon nanotubes (CNTs) is less than 1.5nm, the decrease of the off-current by axial strain occurs together with the decrease of on-current. However, if the diameter of CNTs i…
Abstract The crystallization, uniaxial and biaxial mechanical behavior of poly(D-, L-lactide)-based-blown films was investigated. It was shown that the selected grade of polylactic acid exhibits low isothermal and non-isothermal crystallization kinetics. In addition, the uniaxial stretching evidenced a ductile/fragile…
The stability of monocalcium aluminate decahydrate, with the nominal composition CaAl(2)O(4).10H(2)O (CAH(10)), has a decisive role for the strength development and durability of cementitious materials based on high alumina cements. This has prompted an investigation of the thermal transformation of crystalline monoca…
In the supercritical fluid (SCF) microcellular injection molding process, the polymer melt is first mixed with controlled SCF, followed by cavity filling, creating millions of micron-sized voids within the solidified parts. Benefits associated with this microcellular foaming process include significant reductions in p…
In this work gelatin film was prepared from cow's bone.In order to increase mechanical stability of the prepared transparent film as well as decrease its swelling, glutaraldehyde (GTA) was used.Different mass fractions of GTA were utilized.It was observed that at w = 0.18 % of GTA the load at break of the film is d =…
The effect of electron beam irradiation, EPDM blending, and Azodicarbonamide (ACA) concentration on the foaming properties of LDPE sheet was investigated. The studied properties are foaming degree, cell densities, mechanical properties and thermal decomposition properties. The data showed that the increasing of foamin…
Abstract The rheological properties of two commercially available biodegradable polyesters – poly(lactic acid) (PLA) and aliphatic-aromatic co-polyester Ecoflex™ – have been investigated. The rheological study was focused on measuring the viscosity and examining sharkskin, melt fracture, and extrudate swell phenomena,…
Abstract This contribution outlines the new developments in thermoplastic starch-based (nano)composites useful for more specific applications compatible with our environment, partially based on our ongoing research over the past few years. Accordingly, melt-intercalating starch macromomolecules into layered silicates…
Neutron scattering experiments were performed on single crystals of layered cobalt-oxides La2-xCaxCoO4 (LCCO) to characterize the charge and spin orders in a wide hole-doping range of 0.3<x<0.8. For a commensurate value of x=0.5 in (H,0,L) plane, two types of superlattice reflections concomitantly appear at low temper…
Von Plättchen zu Schichten: Eine topochemische Phasenumwandlung mit Brom in Acetonitril überführt β-Co(OH)2 in monometallisches Co2+,Co3+-Schichtdoppelhydroxid (LDH) mit einem Co2+/Co3+-Verhältnis von 2:1 (siehe die Elementkarten für Co, Br und O in einem Co2+,Co3+-LDH-Plättchen mit intercaliertem Br−). Weitere Behand…