Materials Literature
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A component of the compressive stress that develops during deposition of polycrystalline thin films reversibly changes during interruptions of growth. The mechanism responsible for this phenomenon has been the subject of much recent speculation and experimental work. In this Letter, we have varied the in-plane grain s…
The interaction of water with fabrics, which incorporates water vapor permeability, wicking abilities and drying behaviors of the fabrics, are tested to obtain some comfort-related properties of fabrics from cotton, acrylic and cotton—acrylic blends. The effects of categorical variables such as fiber composition, yarn…
A pseudospin model of a multiferroic system which exhibits both relaxor ferroelectric and relaxor ferromagnetic behavior is presented. The electric and magnetic degrees of freedom associated with the simultaneous presence of polar nanoregions and magnetic nanoregions are described by two sets of pseudospin variables,…
Squaraine nanowires self-organize into a well-ordered film through a simple solvent-evaporation process at the dichloromethane/water interface. The film can be transferred onto various substrates or stacked layer-by-layer into a multilayered structure. This one-step approach offers a low-cost method for producing scal…
Novel chiral AIE compounds bearing a tartaric acid group were synthesized. They selectively aggregated with one enantiomer of a number of chiral amines, such that one enantiomer led to strong fluorescence and another enantiomer showed no or only weak fluorescence. This was used for the quantitative analysis of enantio…
Nanocrystalline phase pure CeCrO 3 was synthesized by a two-step synthesis. The compound was investigated by a host of characterization techniques such as X-ray diffraction, high-temperature X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric−differe…
In this study, thermal properties of different cotton and Angora rabbit fiber blended fabrics were investigated. It is known that cotton fiber has good comfort properties and Angora rabbit fiber is a speciality fur fiber which possesses good softness, whiteness and warmth. The aim of this study was to combine the exce…
An explicit connection between the electronic structure and the anisotropic high conductivity of delafossite-type PdCoO2 has been established by angle-resolved photoemission spectroscopy (ARPES) and core-level x-ray photoemission spectroscopy. The ARPES spectra show that a large hexagonal electronlike Fermi surface (F…
Fine polythiophene (PTh) microparticles were successfully synthesized by a novel interfacial polymerization at a dynamic interface between two immiscible solvents, i.e., n-hexane and acetonitrile or nitromethane containing thiophene and oxidant, respectively. The polymerization yield, size, and electrical conductivity…
Abstract Two series of biodegradable polymer blends were prepared from combinations of poly( L ‐lactide) (PLLA) with poly(ϵ‐caprolactone) (PCL) and poly(butylene succinate‐ co ‐ L ‐lactate) (PBSL) in proportions of 100/0, 90/10, 80/20, and 70/30 (based on the weight percentage). Their mechanical properties were invest…
Adhesion research has made use of surface analysis since the mid-1970s, but by the end of that decade there were, perhaps, only two or three research groups worldwide that had a strong presence in both adhesion and surface analysis. By the end of the following decade, the situation had changed signi cantly and surface…
Abstract Natural leather is processed from hides and skins of animals. Synthetic leathers are becoming popular as an alternative material owing to limited availability and varying size of natural leathers. There is a need to understand the properties of natural and synthetic leathers to select proper material for an a…
Electromagnetic negative refraction in metamaterials has attracted increasingly great interest since its first experimental verification in 2001. It potentially leads to the applications superior to conventional devices including compact antennas for mobile stations, imaging beyond the diffraction limit, and high-reso…
Abstract The flame retardancy of a novel intumescent flame‐retardant polypropylene (IFR‐PP) system, which was composed of a charring agent (CA), ammonium polyphosphate (APP), and polypropylene (PP), could be enhanced significantly by adding a small amount (1.0 wt%) of an organic montmorillonite (O‐MMT). The synergisti…
A novel ordered mesoporous carbon with an interconnected channel structure (OMC-IC) has been successfully fabricated by adding proper hydrophilic SiO(2) nanoparticles to the solution of triblock copolymer F127 and phenol-formaldehyde resol. Experimental results show that the presence of SiO(2) nanoparticles does not h…
We study electronic transport in graphene nanoribbons with rough edges. We first consider a model of weak disorder that corresponds to an armchair ribbon whose width randomly changes by a single unit cell size. We find that in this case, the low-temperature conductivity is governed by an effective one-dimensional hopp…
We demonstrate experimentally and theoretically dielectric metamaterials exhibiting a tunable range of negative effective permeability in the terahertz spectral region (0.2--0.36 THz). Our structures consist of an array of intrinsically nonmagnetic rods made of an incipient ferroelectric ${\text{SrTiO}}_{3}$ which sho…
We report the synthesis and characteristics of a rare-earth based layered family, Ln(8)(OH)(20)(NO(3))(4) x nH(2)O with Ln = Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y, synthesized through homogeneous precipitation of Ln(NO(3))(3) x xH(2)O with hexamethylenetetramine. The products were uniform and of high crystallinity. Th…
57Fe site Mossbauer Spectroscopy (MS) was used to investigate a dynamics of 57Fe atoms embedded into chromium lattice as impurities. From the Mossbauer spectra recorded in the temperature range of 80 to 350 K, a temperature dependence of the Lamb-Mossbauer factor, f, was determined. The latter revealed an unusual dyna…
Mechanical vibrations are known to affect frictional sliding and the associated stick-slip patterns causing sometimes a drastic reduction of the friction force. This issue is relevant for applications in nanotribology and to understand earthquake triggering by small dynamic perturbations . We study the dynamics of rep…