Materials Literature
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Membranes with 1-100 nm nanopores are widely used in water purification and in biotechnology, but are prone to blockage and fouling. Reversibly assembled nanoporous membranes may be advantageous due to recyclability, cleaning, and retentate recovery, as well as the ability to tune the pore size. We report the preparat…
An effective approach is proposed to estimate liquids' contact angles on five commonly used plastics, polyethylene terephthalate, polypropylene, high‐density polyethylene, low‐density polyethylene, and polyvinyl chloride, with pillar‐like structures. A change in liquid droplets' three‐phase contact line due to surface…
Abstract Porous polymeric films are of paramount importance in many areas of modern science and technology. However, processing methods typically based on direct writing, imprint, and lithography techniques have low throughput and are often limited to specific fabricated shapes. Herein, we demonstrate the directional…
The magneto- and Hall resistance of a locally gated cross shaped graphene Hall bar is calculated. The edge of the top gate is placed diagonally across the center of the Hall cross. Four-probe resistance is calculated using the Landauer-Büttiker formalism, while the transmission coefficients are obtained using the non-…
A monolayer of graphene strongly enhances the bi-exciton emission efficiency of CdSe/CdS core/thick-shell nanocrystal quantum dots (NQDs), the so-called “giant”-NQDs. As an explanation, a new plasmon mode is proposed, resulting from local oscillations of excess hole density (the hole puddle) that is accumulated direct…
Fluorescence and thermal stress properties of Yb3+-doped alumino silicate glasses for ultra high peak power laser applications, Tiegel, Mirko, Herrmann, Andreas, Kuhn, Stefan, Rüssel, Christian, Körner, Jörg, Klöpfel, Diethard, Seifert, Reinhard, Hein, Joachim, Kaluza, Malte C
ABSTRACT Rubber nanocomposites based on bromobutyl rubber (BIIR), polyepichlorohydrin rubber (CO), carbon black (CB), and organically modified montmorillonite clay (NC) were prepared via melt compounding technique. Effects of NC dosage on various properties of the developed BIIR-CO nanocomposites were studied. Morphol…
The electric-field-induced polarization and strain of Pb(Mg1/3Nb2/3)O3 (PMN) and Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 (PMN-0.27PT) crystals were investigated at temperatures above their respective maximum permittivity temperatures Tm, where the macro-polarizations vanish while polar nanoregions (PNRs) still persist. The local…
Ferroelectric polymers are among the most promising materials for flexible electronic devices. Highly ordered arrays of the defect-modified ferroelectric polymer P(VDF-TrFE-CFE) (poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene)) are fabricated by nanoimprint lithography for nonvolatile memory applicati…
The birnessite-type layered manganese oxide nanoplates with good dispersity and regular hexagonal morphology were obtained by topochemical oxidizing precursor Mn(OH) 2 in NaClO solution for 24 h at room temperature, and its formation process was systematically investigated on the basis of the XRD pattern, FESEM and TE…
Historical diatom records provide a means of retrospectively determining water quality and inferring ecological condition in rivers and streams. In this study we re-sampled sites originally sampled 48 years previously. We then determined the scores for the Biological Diatom Index (BDI) and the South African Diatom Ind…
Visible light photoredox catalysis was combined with immersion particle lithography to prepare polynitrophenylene organic films on Au(111) surfaces, forming a periodic arrangement of nanopores. Surfaces masked with mesospheres were immersed in solutions of p-nitrobenzenediazonium tetrafluoroborate and irradiated with…
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We report on the marked improvements in key device characteristics of single walled carbon nanotube (SWCNT) field-effect transistors (FETs) by coating the active semiconductor with a fluoropolymer layer such as poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE). The observed improvements include: (i) A reduction…
An electric-field pulses driven magnetoelectric memory cell in a single layered ferromagnetic thin film was fabricated by direct-current magnetron sputtering Ru/Fe65Co35 on ferroelectric (110) [Pb(Mg1/2 Nb2/3)O3]0.68-[PbTiO3]0.32 (PMN-PT) substrates. The magnetization in the orthogonal directions can be reset by the p…
Highly reduced surface reconstructions of BaTiO3 (001) have been found to be composed of a TiO2 surface covered with Ti adatoms occupying surface interstitial sites. We predict the reactivity of these highly oxophilic and reduced surface Ti species through density functional theory, where we calculate the adsorption o…
Gold nanorods (GNRs) have recently been widely studied due to their unique optical and electronic properties which are dependent on their shape, size, and aspect ratio. Seed-mediated growth method has become the most widely method for the synthesis of GNRs due to its advantages of simplicity of procedure, high yield o…
High Resolution Image Download MS PowerPoint Slide Conducting polymers with redox active pendant groups show properties typical of both conducting polymers (i.e., capacitive charging and intrinsic conductivity) and redox polymers (i.e., electrochemical surface response at the formal potential of the pendant groups). T…
We investigate the topological transition in metamaterials considering a structure composed of the uniaxial electric scatterers. Our study is based on the discrete dipole model, which allows us to take into account the effects of spatial dispersion in the structure. The nonlocal effects lead to the existence of the tr…
Melamine polyphosphate (MPP) and halloysite nanotubes (HNT) were introduced to polyamide 6 (PA6) by melt blending in order to improve the fire resistance. PA6 composite containing 12% flame retardants with good spinnability was obtained. The flammability of PA6 composite was characterized by limiting oxygen index (LOI…