Materials Literature
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Flexible all-organic polymer-dispersed liquid crystal (PDLC) devices were fabricated by using highly transparent and conductive poly(3,4-ethylenedioxy thiophene): p-toluene sulfonate (PEDOT:PTS) films, as electrode layers. These conductive PEDOT:PTS films have a high transparency up to 80%, and possess a very low shee…
A new ion-transfer-based mechanism is proposed for the growth of CuTCNQ nanowires within the confines of an anodic aluminum oxide template. Remarkably, Cu ions are found to move across the growing solid single-crystalline nanowire at a very high rate with macroscopic distance, as schematically illustrated in the figur…
A “misfit strain-temperature” phase diagram for BiFeO3 thin film was constructed based on the Landau–Devonshire theory with the mechanical substrate effect. It is found that the polarization instabilities result in the formation of the monoclinic phases in BiFeO3 thin films. The effective substrate lattice parameter h…
Excitation/emission polarization anisotropies (ρexc∕emm) of single CdSe nanowires (NWs) were studied for their size, frequency, and dielectric environment dependencies. Single NW optical experiments show strong ρexc dielectric environment dependencies for both thick and thin NWs in agreement with classical dielectric…
SiN x passivation films were deposited on carbon nanotube field-effect transistors (CNTFETs) by catalytic chemical vapor deposition (Cat-CVD) at low substrate temperatures. Deposition at 330°C induced many defects in the CNT channels. The measurement of electrical properties revealed that p-type CNTFETs were converted…
We report Monte Carlo simulations of the self-assembly of supramolecular polymers based on a model of patchy particles. We find a first-order phase transition, characterized by hysteresis and nucleation, toward a solid bundle of polymers, of length much greater than the average gas phase length. We argue that the bund…
We perform a detailed investigation of the local atomic structure in highly magnetostrictive $\ensuremath{\alpha}\text{-FeGa}$ melt-spun ribbons. By using extended x-ray absorption fine structure (EXAFS) analysis at the Fe and $\text{Ga}\text{ }K$ edges coupled to x-ray diffraction (XRD) and to ab initio full multiple…
Silicalite-1 monolayers on α-Al2O3 supported polymer thin films with strong zeolite-polymer bonding, high surface coverage, uniform orientation in b-axis, and easy control of assembly could be manufactured by the stacking and sonication assembly or by the simpler manual assembly (see the figure). The methodology can b…
A two-dimensional patterning method that allows for flexible designs is demonstrated by combining bottom-up diblock copolymer self-assembly with top-down electron beam lithography (EBL), which increases the applicability of block copolymer lithography to nanodevice fabrication. Both bent lamellae and concentric cylind…
Abstract Photodegradable polypropylene (PP) composites were prepared via melting blending using PP and titanium dioxide (TiO 2 ) immobilized organically modified montmorillonite (organoclay). TiO 2 immobilized organoclay (TiO 2 ‐OMT) was synthesized by immobilizing anatase TiO 2 nanoparticles on organically modified c…
Abstract Solvothermal reaction of [MnCl 2 (cyclam)]Cl with GeSe 2 at a 1:1 molar ratio in CH 3 OH/H 2 O (1/1) at 150 °C affords the dimanganese(II) complex [{Mn(cyclam)} 2 (μ‐Ge 2 Se 7 )]·CH 3 OH·1.5H 2 O ( 1 ) with a spirotricyclic [Mn(μ‐Ge 2 Se 7 )Mn] core. The strained four‐membered Mn‐Se t ‐Ge‐Se t ′ rings (Se t =…
The luminescent emittance color of non-emissive polystyrene (PS) is varied from blue to white by irradiation with an electron beam. Desired luminescent nanoarchitectures and nanopatte rns are produced in straightforward manner by direct electron-beam writing and by irradiating well-defined PS nanoarchitectures prep ar…
We report the observation of imaging beyond the diffraction limit due to bound surface states in negative refraction photonic crystals. We achieve an effective negative index figure of merit [-Re(n)/Im(n)] of at least 380, approximately 125x improvement over recent efforts in the near-infrared range, with a 0.4 THz ba…
Abstract Polycrystalline material of α‐Y 2 Si 2 O 7 has been obtained from the thermal decomposition of a precursor prepared by a sol‐gel process and subsequently characterized by X‐ray powder diffraction and Raman spectroscopy. The structure belongs to the so‐called B‐type of rare earth element disilicates and was re…
We report the effects of barrier layer on the electroluminescence properties of the SiN-based multilayer light-emitting devices (LEDs). It is found that the emission efficiency is significantly enhanced by more than one order of magnitude compared to that of LED without barrier layer. Meanwhile, the emission wavelengt…
Nanoscale imaging of the electrical properties of CaCu3Ti4O12 ceramics has been performed using scanning impedance microscopy. Two kinds of electrical inhomogeneity are detected, namely, depletion layers at grain boundaries and calcium titanate inclusions, both of which are more resistive than the bulk of the grains.…
A fringe-field-switching (FFS) liquid crystal display (LCD) using a thin cell doped with a reverse-handed chiral compound is proposed. Such a FFS LCD exhibits a fast response time (∼8ms), high transmittance (>90%), low operating voltage (5Vrms), and intrinsically wide viewing angle. Its application for LCD tele…
We present an experiment for the creation of unconventional ferromagnetism in pure ZnO powder by application of mechanical force. The ferromagnetism is related to flakelike structures in planar compressed pieces of the powder with easy axis in the plane. It is associated with defect creation and disappears upon anneal…
Erbium-doped silicon-rich nitride/silicon superlattice structures were fabricated by direct magnetron cosputtering deposition on Si substrates. Rapid thermal annealing resulted in the nucleation of small amorphous Si clusters, which efficiently sensitize 1.54μm emission via a nanosecond-fast nonresonant energy transfe…
We report the fabrication of the high-quality Sb-doped ZnO nanobelts by using a simple chemical vapor deposition method. The nanobelts consist of single-crystalline wurtzite ZnO crystal and grow along [011¯2] direction. An electromechanical system is constructed to explore the transverse electrical properties of a sin…