Materials Literature
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Abstract This Letter reports the novel use of poly(9‐vinylcarbazole) (PVK) as a dielectric interfacial layer for n‐type organic field‐effect transistors (n‐OFETs). With PVK, both the air stability and electron mobility of N,N′‐ditridecylperylene‐3,4,9,10‐tetracarboxylic diimide (PTCDI‐C13)‐based OFETs were improved. A…
Kogelnik's Coupled wave theory [1], published in 1969, has provided an extremely successful approach to understanding diffraction in sinusoidal volume gratings and in providing analytic formulae for the calculation of diffractive efficiency. N-coupled wave theory [2] has extended Kogelnik's approach to provide a usefu…
In this paper, based on the generalized coated coherent potential approximation method, we derive the mathematical formulae, for the extended effective medium theory, to investigate the optical properties of disordered media composed of core–shell cylinders. The effective indices of such media are obtained in the long…
We investigated the formation of extended defects in CaFeO2.5, predominantly appearing as antiphase boundaries (APBs), as a function of the synthesis method and temperature. While CaFeO2.5 is known to adopt an ordered oxygen defect structure showing long range order of the (FeO4)∞ chains in its bulk form, interestingl…
Abstract The behavior of the ring‐expansion homopolymerization of 2 (phenoxymethyl)thiirane (PMT) and propylene sulfide (PS), respectively, with thiazolidine‐2,4‐dione (TZD) as a cyclic initiator is investigated. The polymerizations show steadily growing molar masses with increasing monomer conversions. In addition, r…
A low temperature amorphous silicon (a-Si) thin film transistor (TFT) and amorphous silicon PIN photodiode technology for flexible passive pixel detector arrays has been developed using active matrix display technology. The flexible detector arrays can be conformed to non-planar surfaces with the potential to detect x…
Abstract Oxide‐based thin‐film capacitors (TFCs), thin‐film transistors (TFTs), and sensor structures (including transparent ones) deposited on transparent substrates are investigated. All oxide elements in these structures are deposited by atomic layer deposition (ALD). Optimization of the ALD processes, which result…
ABSTRACT Monoalkynyl‐functionalized fullerene was precisely synthesized starting with pristine fullerene (C60) and characterized by multiple techniques. Methyl methacrylate and 6‐azido hexyl methacrylate were then randomly copolymerized via reversible addition fragmentation chain transfer polymerization to build polym…
The final step in the biosynthesis of the 22nd genetically encoded amino acid, pyrrolysine, is catalyzed by PylD, a structurally and mechanistically unique dehydrogenase. This catalyzed reaction includes an induced-fit mechanism achieved by major structural rearrangements of the N-terminal helix upon substrate binding…
X-ray absorption and scattering spectroscopies involving the 3d transition-metal K- and L-edges have a long history in studying inorganic and bioinorganic molecules. However, there have been very few studies using the M-edges, which are below 100 eV. Synchrotron-based X-ray sources can have higher energy resolution at…
The full Maxwell equations for a system of concentric shells of a noble metal and a semiconductor, with a very sharp excitonic resonance with a bare frequency in the gap between the bare plasmonic resonant frequency branches and having a strong oscillator strength, are solved. The plasmon-exciton coupling model is ver…
Skeletal Ni catalysts were prepared from an amorphous Ni40Zr60 alloy (a-NiZr) by heating at various temperatures under vacuum, followed by the selective extraction of Zr moieties by an HF treatment. Each sample was characterized by various spectroscopic methods, and the catalytic performance was tested in the hydrogen…
The solubility, density, refractive index, viscosity and electrical conductivity for aqueous solutions of Li 2 SO 4 from (0 to 3.1472) mol·kg –1 H 2 O, saturated in H 3 BO 3, over the temperature range from (293.15 to 313.15) K have been determined. These physical properties were represented by equations as functions…
Abstract Fullerene C60 dimers encapsulating one or two molecules of water in two C60 cages were newly synthesized, demonstrating almost no difference in chemical reactivity between empty C60 and H2O@C60. The X-ray structure of the doubly encapsulating dimer revealed the existance of the water molecules at the center o…
A GaN-based light-emitting diode (LED) with an aluminum (Al) reflecting and an SiO2insulating layers (RILs) deposited on the naturally textured p-GaN surface is fabricated and studied. The use of RIL could enhance the current spreading performance and reduce the photon absorption by the p-pad metal. The textured surfa…
In situ synthesis of gold nanoparticles on paper sheets was achieved without any external reducing reagents and heat treatments. Surface-activated pulp fibers with carboxyl and aldehyde contents of 1.18 and 0.349 mmol g–1, respectively, which were obtained from softwood kraft pulp using 2,2,6,6-tetramethylpiperidine 1…
Abstract Multipass plain strain compression test of 7055 alloy was carried out on Gleeble 1500D thermomechanical simulator to study the effect of interval time on static softening behavior between two passes. Microstructural features of the alloy deformed with delay times varying from 0 to 180 s after achieving a redu…
In this paper, the modal analysis of a novel design of a hybrid long-range plasmonic waveguide is introduced and analyzed using the full-vectorial finite difference method. The suggested design has high index material as a cap to reduce the propagation loss and optimum bending radius as well. The analyzed parameters a…
The use of microcomponents as well as intensive competition on manufacturing cost led to the requirement for cost-effective production of those components without much compromise on their final quality. To address this issue, a novel microforming technology, named as micro-field-activated sintering technology (Micro-F…
We show that in plasmonic systems, exact loss compensation can be achieved with the help of spasers pumped over a wide range of pumping values both below and above the spasing threshold. We demonstrate that the difference between spaser operation below and above the spasing threshold vanishes, when the spaser is synch…