Materials Literature
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We find that O-vacancy (Vo) acts as a hole trap and play a role in negative bias illumination stress instability in amorphous In-Ga-Zn-O thin film transistors. Photo-excited holes drifted toward the channel/dielectric interface due to small potential barriers and can be captured by Vo in the dielectrics. While Vo(+2)…
Making use of detailed classical Monte Carlo simulations, we study the critical properties of a two dimensional planar spin model on a square lattice composed by weakly interacting helimagnetic chains. We find a large temperature window where the vector chirality order parameter, =, the key quantity in multiferroic sy…
We have investigated the temperature dependence of the resistive upper critical fields ($\mu_{0}H_{\rm c2}(T)$) for an Fe$_{1.05}$Te$_{0.85}$Se$_{0.15}$ single crystal, which exhibit superconductivity at $T_{\rm c} \sim 14 K, in magnetic fields of up to 55 T. Two-dimensional feature and superconducting fluctuations of…
The exciton dynamics on flat (001) rubrene crystal surfaces have been compared with those under confined pyramidal geometry by time-resolved photoluminescence with micrometer spatial resolution. The luminescence spectra can be interpreted in terms of generation of a free and a self-trapped exciton. Their ratio depends…
Graphene has recently attracted a great deal of interest in both academia and industry because of its unique electronic and optical properties [1,2], as well as its chemical, thermal, and mechanical properties. The superb characteristics of graphene make this material one of the most promising candidates for various a…
There has been extensive research on the development of organic optoelectronic devices, such as organic light-emitting diodes, organic field-effect transistors, and organic solid-state lasers from various viewpoints, ranging from basic studies to practical applications. As organic materials are used as solids in these…
Chitosan has received much attention as a functional biopolymer for diverse applications, especially in pharmaceutics and medicine. Our recent efforts focused on the chemical and biological modification of chitosan in order to increase its solubility in aqueous solutions and absorbability in the in vivo system, thus f…
In recent years, the ferroelectric properties of aurivillius oxides have attracted interest and an extensive amount of work has been done toward the realization of their potential application in nonvolatile memories (FeRAM: ferroelectric random access memory). Recently, we have carried out computer simulation in atomi…
Quantum chemical calculations have been performed to determine the magnetic coupling between transition metals in the anionic layers of bifunctional materials. These layers are characterized by a hexagonal grid of oxalato-bridged transition metal ions, [M(2)(ox)(3)](2-), with M = Cu(2+), Ni(2+), Co(2+), Fe(2+). No exp…
Component,assemblage,content and crystalization of clay minerals in sediments can reflect cold-warm cyclical changes of climate and their sedimentary environments.In recent years,clay mineralogy is regarded as a valuable tool for reconstructing ancient environmental conditions and becomes an efficient method of source…
Study of chitosan prepared with chitin deacetylation by multistage alkali treatments has been done. Chitin was extracted from Lampung white shrimp's (Litophenaeus vannamei) shell. The FTIR spectroscopy was used to determine deacetylation degree of chitin/chitosan. Viscometry was used to determine molecular weight of c…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionRoom-Temperature Healing of a Thermosetting Polymer Network Using the Diels−Alder ReactionAmy M. Peterson*, Robert E. Jensen, and Giuseppe R. PalmeseCite this: ACS Appl. Mater. Interfaces 2010, 2, 7, 2169Publication Date…
Abstract Nanocomposites were prepared from the resin of 4,4′‐bismaleimido‐diphenylmethane (BDM) with dipropargyl ethers of hexafluorobisphenol A (DPBPF) and octaphenylsilsesquioxane (OPS) or nano‐SiO 2 . The nanocomposites were characterized by Fourier transform infrared spectroscopy, scanning electron microscope, dyn…
Jute fiber was treated with o-, m-, and p-hydroxybenzenediazonium salts in neutral media. These modified and raw jute fibers were used to prepare jute-polypropylene (PP) composite containing 20, 25, 30, and 35% by weight fraction. Mechanical properties of composites were studied. It was found that the increase in fibe…
Thermo-chemical treatment (TCT) such as pyrolysis is getting recognized as a valid route for (i) materials and valuable products and petrochemicals recovery; (ii) waste recycling; and (iii) elemental characterization. Pyrolysis is also receiving renewed attention for its operational, economical and environmental advan…
Deficiencies in practical applications for magnetic shape memory actuators motivated the authors to start experimental and theoretical research in the field of multifunctional materials. The authors present the concept of using magnetic shape memory actuators for controlling, altering and tuning the forced vibration o…
Abstract Efficient p‐type doping of zinc oxide (ZnO) is hindered on the one hand by the strong native n‐type doping of the ZnO, on the other hand, compensation effects (defect generation due to p‐doping) tend to preserve the n‐type doping. Incorporation of nitrogen is proposed as a promising method to achieve p‐type Z…
This paper discusses design details and measurement principles of a dynamic sweating hotplate system used for both steady-state thermal and water vapor resistance and dynamic water vapor transmission rate measurements. Dynamic and steady-state transfer measurements were carried out by separate systems in preceding stu…
We present results of inelastic neutron scattering experiments performed for the compound $[{\text{Mo}}_{12}{\text{O}}_{28}{({\ensuremath{\mu}}_{2}\text{-OH})}_{9}{({\ensuremath{\mu}}_{3}\text{-OH})}_{3}{{\text{Ni}{({\text{H}}_{2}\text{O})}_{3}}}_{4}]\ensuremath{\cdot}13{\text{H}}_{2}\text{O}$, which is a molecular ma…
A simple and compact arrangement for flash evaporation is described. It uses a cell phone vibrator for powder dispensing that can be incorporated into a vacuum deposition chamber without any major alterations. The performance of the flash evaporation system is checked by making thin films of the optical memory chalcog…