Materials Literature
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Al-doped ZnO (AZO) thin films were grown by atomic layer deposition (ALD) for use as transparent conductive oxides on high aspect ratio Si microrod arrays. The ALD-deposited AZO films showed high optical transmittance and electrical conductivity despite their polycrystalline structures and resulted in a superior confo…
Peapods present a model system for studying the properties of dimensionally constrained crystal structures, whose dynamical properties are very important. We have recently studied the rotational dynamics of C(60) molecules confined inside single walled carbon nanotube (SWNT) by analyzing the intermediate frequency mod…
A novel observation method is proposed to study the streamer-leader propagation processes of long air-gap positive discharges. Experiments of 3-12 m air-gap discharges have been conducted in this paper. The observed images could clearly and particularly describe the characteristics of the positive streamer-leader prop…
Poly( l -lactic acid) (PLLA) pellets were degraded in a batch reactor under hydrothermal conditions of aqueous sodium hydroxide solution, from 343 to 453 K, compared to water in the absence of NaOH. Over an entire range of conversion, components solubilized from PLLA mainly consisted of l -lactic acid (LLA) in the pre…
Abstract Wood/plastic composites (WPCs) can absorb moisture in a humid environment due to the hydrophilic nature of the wood in the composites, making products susceptible to microbial growth and loss of mechanical properties. Co‐extruding a poly(vinyl chloride) (PVC)‐rich cap layer on a WPC significantly reduces the…
A solid-stabilized multiple w/o/w or o/w/o emulsion was prepared in a two-step process. Various nanocomposite polymer microspheres with multihollow armored closed pores were fabricated easily by suspension polymerization of the multiple Pickering stabilized emulsions.
Monitoring of environmental pollutants has become increasingly important due to concern over potential health and environmental impact inflicted by these chemicals. In this contribution, we focus on the development of an all-plastic biosensor comprising laminated single-walled carbon nanotubes as the active element an…
We report here the development of a very flexible synthetic approach to generate core−shell nanoparticles below 100 nm diameter, whereby thin polymer shells are synthesized under nonaqueous conditions in a variety of organic solvents with diverse properties. This facilitates incorporation of a wide range of functional…
The ditopic carbohydrazide and thiocarbohydrazide based ligands H₂L1 and H₂L2 react with Co(II)(OAc)₂ to produce the homoleptic Co(II) molecular rectangles 1 and 2, containing either a mixture of high spin and low spin Co(II) sites or exclusively low spin Co(II) centers, respectively, with two mono-deprotonated ligand…
We show that previously measured small Fermi-surface pockets within the antiferromagnetic phase of ${\text{SrFe}}_{2}{\text{As}}_{2}$ and ${\text{BaFe}}_{2}{\text{As}}_{2}$ are consistent with a Dirac dispersion modulated by interlayer hopping, giving rise to a Dirac point in $k$ space and a cusp in the magnetic field…
Ba 1− x − y Sr y Ca x TiO 3 (BSCT, y =0, x =0–1; y =0.05, x =0–0.95; y =0.1, x =0–0.9; y =0.13, x =0–0.87; and y =0–0.20, x =0.5− y /2) ceramics were prepared using the solid‐state reaction method in this paper. Their structural and dielectric properties were characterized. The results of refined X‐ray diffractometer…
Using optical and scanning electron microscopies, dynamic mechanical analysis, and differential scanning calorimetry, this study investigated effects of tacticity in PMMAs on the phase behavior in three pairs of binary blends comprising any two of isotactic-, syndiotactic-, and atactic-PMMAs. Miscibility was confirmed…
The negative thermal expansion (NTE) and correlated magnetic and electrical transport properties of Mn 3 Ga x Si 1− x N were investigated. For pure Mn 3 GaN, there is a large NTE effect corresponding to the antiferromagnetic to paramagnetic transition. Very interestingly, when partial Ga was replaced by Si, the NTE pr…
Jump to it! 2D IR pressure-jump spectroscopy of adsorbed CO can be used to assess the accessibility and location of platinum nanoparticles supported on a zeolite and investigate the behavior of Pt atoms after thermal treatment (activation, catalytic reaction, sintering). Different Pt nanoparticle sintering mechanisms…
In this study, mesoporous or colloidal silica particles were incorporated into polystyrene matrices via melt blending or by styrene polymerization initiated from the particle surface. The relationships between the surface morphology of filler particles in polymer composites and their thermomechanical properties were i…
A straightforward method is presented for the preparation of homogeneous as well as structured polymer brushes on SiC substrates. The self-initiated photografting and photopolymerization (SIPGP) of styrene and N, N -dimethylaminoethyl methacrylate (MAEMA) allows the preparation of polymer brush layers directly and sel…
We show that the width of the longitudinal magnetoconductivity peaks in graphene related to the $N=1$ Landau level displays a power-law type temperature dependence, $\ensuremath{\Delta}\ensuremath{\nu}\ensuremath{\propto}{T}^{\ensuremath{\kappa}}$, with $\ensuremath{\kappa}=0.37\ifmmode\pm\else\textpm\fi{}0.05$. Simil…
Two different Pd complexes are supported on the mercaptopropyltrimethoxy silyl-functionalized mesoporous material KIT-6 and their activity in the Suzuki−Miyaura cross coupling reaction is examined. Remarkably, these materials show a much greater recyclability than the corresponding SBA-15-based materials, which lose a…
Zwitterionomers containing less than 13 mol % zwitterion functionality were synthesized using free radical copolymerization of n -butyl acrylate (nBA) and sulfobetaine monomers. X-ray scattering results revealed a two-phase morphology, which is typical of random ionomers with an ionomer peak at q ∼1.5 nm −1 . Swelling…
The liquid-liquid phase separation of a binary solvent can be arrested by colloidal particles trapped at the interface [K. Stratford, Science 309, 2198 (2005)]. We show experimentally that the colloidal network so formed can remain stable after fully remixing the liquids, creating a new type of gel in which colloids i…