Materials Literature
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We report on the observation of photocurrent response of a PbS/InP heterojunction. The PbS/InP heterostructure is synthesized via aqueous solution-based heteroepitaxial growth, and is fabricated into a photodetector. At zero bias, two photoresponse bands between 0.75 and 3.1 μm are measured at room temperature, which…
Using pulsed gradient spin-echo NMR, we studied molecular self-diffusion in aligned samples of a hybrid lyotropic lamellar L(alpha) phase. This composite organic-inorganic material was obtained by doping the lamellar phase of the nonionic surfactant Brij-30 with the [PW(12)O(40)](3-) polyoxometalate (POM). Both water…
Using first-principles calculations based on density functional theory, we study the properties of germanium telluride crystalline nanoplatelets and nanoparticles. Above a diameter of 2.7 nm, we predict the appearance of polarization vortices giving rise to an unusual ferrotoroidic ground state with a spontaneous and…
Polymer-dispersed liquid crystals (PDLCs) are composite materials that consist of micrometre-sized liquid-crystal (LC) droplets embedded in a polymer matrix. From ferroelectric poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) and a nematic LC, PDLC films containing 10 and 60 wt% LC were prepared, and their el…
Abstract Solution properties of polyaniline (PANI) synthesized at various temperatures were studied using static light scattering (SLS), intrinsic viscosity, and dynamic light scattering (DLS). We demonstrated that average radius of gyration 〈 R g 〉, intrinsic viscosity [η], and average hydrodynamic radius 〈 R H 〉, of…
Abstract This article reports a simple self‐assembly process for facile one‐step synthesis of novel electromagnetic functionalized polypyrrole (PPy)/Fe 3 O 4 composite nanotubes using p ‐toluenesulfonic acid ( p ‐TSA) as the dopant and FeCl 3 as the oxidant. The key trick of the present method is to use FeCl 3 as the…
Penetration depth of plasma surface modification of inkjet printing polyester fabrics was investigated. A four‐layer stack of woven polyester fabrics was exposed to atmospheric pressure air plasma. Surface morphology and chemical compositions of each fabric layer in the stack were analysed by atomic force microscopy (…
Negative thermal expansion (NTE) in tellurium based liquid alloys (GeTe6 and GeTe12) is analyzed through the atomic vibrational properties. Using neutron inelastic scattering, we show that the structural evolution resulting in the NTE is due to a gain of vibrational entropy that cancels out the Peierls distortion. In…
Boiling of emulsions is a field that has been studied little and is poorly understood. Experiments have shown that boiling in emulsion is a complex phenomenon and that a wide range of behaviors are possible. A model of boiling emulsions put forward by one group of researchers provides some explanation for the behavior…
Hexagonal ZnO bipyramids, cones, as well as rods were prepared through a facile solution route. The as-prepared products were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction. A surfactant-assisted intergrowth mechanism was proposed to be accounting for the f…
Nanostructured CaCO 3 (NCC) thin films with honeycomb-shaped nanopores were obtained at the surface of urease-embedded multilayers prepared by the layer-by-layer deposition. Amorphous CaCO 3 (ACC) droplets were initially nucleated from the multilayer surface, because of the enzymatic reaction of ureases to produce CO…
Vertically aligned carbon nanotube forests, including single-walled nanotubes, are imaged optically as they grow in situ from cobalt/alumina catalyst using water-assisted acetylene chemical vapor deposition. Three distinct termination morphologies are identified and investigated optically and via scanning electron mic…
Low operating electric field and stable emission current have been achieved in IrO(2) nanocrystal-coated carbon nanotube bundle arrays (CNTBAs). Patterned vertically aligned CNTBAs were synthesized using thermal chemical vapor deposition followed by the deposition of IrO(2) nanocrystals by reactive radio-frequency mag…
Fast magnetic measurements performed by means of a 20 T pulse-field magnet provide a good approach for directly monitoring the magnetocaloric effect of the MnFe(P,Ge) compounds. Based on the comparison of magnetization curves obtained either in an adiabatic or isothermal process, we propose that the method introduced…
Novel nonconjugated copolymer precursors containing polymerizable triEDOT and nonpolymerizable diphenyl triEDOT at side chains were synthesized by the ring-opening metathesis polymerization (ROMP). Subjecting these polymers to oxidative conditions selectively cross-links the triEDOT units, while leaving the diphenyl t…
Using the nonequilibrium Green’s function method, the electronic transport in a gate-induced barrier bilayer graphene structure is investigated. Strong resonant effects are shown to result in high amplitude oscillation of conductance as a function of Fermi energy and barrier height. Beyond a small effect of negative d…
Quenching of emissions from cadmium telluride (CdTe) nanoparticles was distinctly observed by the addition of various electrochemically active organic molecules. The quenching ability of organic molecules is greatly influenced not only by their valency and redox potential but also by a type of capping ligand and the p…
In this paper, we report a new optical data storage method: photomodification of hollow gold nanoparticle (HGN) monolayers induced by one-shot deep-ultraviolet (DUV) KrF laser recording. As far as we are aware, this study is the first to apply HGNs in optical data storage and also the first to use a recording light so…
Abstract Structure formation by coupling between formation of crosslinking points and liquid–liquid phase separation was investigated for aqueous methyl cellulose solution by small‐angle X‐ray scattering (SAXS) and light scattering (LS) techniques. The sol–gel phase diagram and the SAXS results suggested that the liqu…
This work deals with the follow-up of structure evolution in clay−polymer nanocomposites during the intercalation process through in situ analyses combining X-ray diffraction and rheology using a home-modified X-ray diffraction setup coupled with a rheometer with a special shearing cell developed for this work. To avo…