Materials Literature
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Abstract We report the successful measurement of the specific surface area of chemically synthesized and treated polyaniline (PANI) and its composite PANI/silica (SiO 2 ). PANI was synthesized chemically from an aqueous solution of aniline and hydrochloric acid (HCl) in the presence of an oxidant, ammonium peroxydisul…
Abstract The comb‐type polyelectrolyte, poly(ethylene glycol)‐ graft ‐poly(allyl amine) (PEG‐g‐PAA), was synthesized to prepare polyion complex (PIC) micelles with Aspergillus Niger Glucose oxidase (GOD). Even after mixing GOD and PEG‐g‐PAAs with various PEG contents, the resulting mixtures remained transparent but th…
Abstract Amorphous poly(ether‐ether‐ketone) (PEEK) progressively crosslinks on irradiation with 11.0 MeV protons, and this has a marked effect on the extent of crystallinity that subsequently develops and on the kinetics of the high temperature isothermal crystallization. The extent of crystallinity with time was anal…
A field-emission cathode is fabricated with ZnO tetrapodlike nanoemitters. With a simple planar triode structure, a cathodoluminescent light source has been investigated. Because of the characteristics of surface-conduction electron-emission planar triode, this cathodoluminescent light source shows a very good perform…
In the hot debate on arthropod relationships, Crustaceans and the morphology of their appendages play a pivotal role. To gain new insights into how arthropod appendages evolved, developmental biologists recently have begun to examine the expression and function of Drosophila appendage genes in Crustaceans. However, ce…
We examine a simple hard-disk fluid with no long-range interactions on the two-dimensional space of constant negative Gaussian curvature, the hyperbolic plane. This geometry provides a natural mechanism by which global crystalline order is frustrated, allowing us to construct a tractable, one-parameter model of disord…
Engineering resonances in metamaterials has been so far the main way of reaching simultaneously negative permittivity and negative permeability leading to negative index materials. In this paper, we present an experimental and numerical analysis of the infrared response of metamaterials made of continuous nanowires an…
We performed comprehensive structural studies on local ionic displacements and medium-range ordering across a series of phase transitions in (1−x)Pb(Zn1∕3Nb2∕3)O3–xPbTiO3 (PZN-xPT) at 15K by using neutron pair-distribution-function (PDF) and Rietveld analyses. PDF spectra clearly demonstrate that all phases of PZN-xPT…
Collagen gels provide a biocompatible matrix for replacing soft tissues, but it is essential to determine whether the mechanical properties of the matrix can be retained after cell ingrowth into the collagen scaffold. We have determined the mechanical strength of four collagen gel compositions (plain collagen; collage…
Ferromagnetic film of densely packing chromium oxide nanoparticles has been fabricated by vacuum deposition of chromium oxide clusters at room temperature. The clusters were generated with a magnetron plasma gas aggregation source by introducing a mixture of argon and oxygen as buffer gas. A magnetic hysteresis loop s…
The structure and formation of nanoparticles without encapsulation of the intermetallic compound DyCo2 were investigated by using x-ray diffraction and high-resolution transmission electron microscopy. The DyCo2 nanoparticles are stable in air without any shell protection. A large magnetic-entropy change of 13.2Jkg−1K…
The polarization switching kinetics of ferroelectric Langmuir–Blodgett films of vinylidene fluoride-trifluoroethylene copolymer were investigated by piezoresponse force microscopy with a resolution of 100nm. The switching time in response to a localized voltage pulse exhibits an exponential dependence on reciprocal vo…
The conversion of 6-azido-6-deoxy cellulose (degree of substitution, DS 0.75) homogeneously in the ionic liquid 1-ethyl-3-methylimidazolium acetate with polyamidoamine (PAMAM) dendrons possessing an ethynyl focal moiety via the copper catalyzed Huisgen reaction (“click” reaction) yielded a novel biopolymer derivative.…
High-density capacitively coupled plasma with electron density of 1011cm−3 was produced with the effects of the multihollow cathode discharge and the high-secondary-electron emission from radio frequency (rf)-biased electrode using Ar gas. It was found that the optimum pressure was around 3–15Pa. In the case of only m…
Evaluation of nutrient status in soil is important for nutritional, environmental, and economical aspects. This research was carried out to determine the potassium (K) available to corn (Zea mays) in 15 soils from the Hamedan province in the west of Iran. The treatments included two K levels [0 and 200 mg K kg−1 as po…
We present the results of our investigation into the effects of pressure and light on the high spin⇆low spin transition behavior of the dinuclear iron(II) compound [FeII2(PMAT)2](BF4)4⋅DMF. It is found that increased pressure favors the stabilization of the system through a transition from the (HS-HS) state to the (HS…
Magnetoelastic domains in ferromagnetic shape memory alloys evolve through either variant rearrangement or magnetization rotation, resulting in a large or a small magnetic field-induced strain depending on the magnitude of applied compressive stress. These phenomena are simulated in this letter using an unconventional…
Polymer-free photovoltaic devices were fabricated via a solution process using PbSe colloidal quantum dots and an organic semiconductor, tetrabenzoporphyrin, that can be derived from a soluble precursor. Flat heterojunction (FHJ) and bulk heterojunction (BHJ) devices were fabricated and the current-voltage characteris…
Abstract A novel amperometric glucose biosensor based on self‐assembling glucose oxidase (GOx) and dendrimer‐encapsulated Pt nanoparticles (Pt‐DENs) on nanofibrous polyaniline (PANI) was described. PANI nanofibers were synthesized via an interfacial polymerization method. A sulfonated polyelectrolytes‐poly(sodium 4‐st…
New palladium(II) complexes of the free-base tetrakis[2,3-(5,6-di-2-pyridylpyrazino)porphyrazine], [Py 8TPyzPzH 2], have been prepared and their physicochemical properties examined. The investigated compounds are the pentanuclear species [(PdCl 2) 4Py 8TPyzPzPd], the monopalladated complex [Py 8TPyzPzPd], and its corr…