Materials Literature
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Newly developed fabrication technique of thermoresponsive surface using RAFT-mediated block copolymerization and photolithography achieved stripe-like micropatterning of poly(N-isopropylacrylamide) (PIPAAm) brush domains and poly(N-isopropylacrylamide)-b-poly(N-acryloylmorpholine) domains. Normal human dermal fibrobla…
Light-emitting diodes [LEDs] are of particular interest recently as their performance is approaching fluorescent/incandescent tubes. Moreover, their energy-saving property is attracting many researchers because of the huge energy crisis we are facing. Among all methods intending to enhance the efficiency and intensity…
We report a detailed high-resolution powder neutron diffraction investigation of the structural behavior of the multiferroic hexagonal polymorph of YMnO${}_{3}$ between room temperature and 1403 K. The study was aimed at resolving previous uncertainties regarding the nature of the paraelectric-ferroelectric transition…
High resolution angle-resolved photoemission measurements have been carried out to study the electronic structure and superconducting gap of the $({\mathrm{Tl}}_{0.58}{\mathrm{Rb}}_{0.42}){\mathrm{Fe}}_{1.72}{\mathrm{Se}}_{2}$ superconductor with a ${T}_{c}=32\text{ }\text{ }\mathrm{K}$. The Fermi surface topology con…
Charging clusters: A hybrid of polyoxometalate (POM) molecules individually adsorbed onto the surfaces of single-wall carbon nanotubes (SWNTs) can be used as a cathode-active material in rechargeable lithium batteries. This POM/SWNT battery exhibited a very high capacity (>300 Ah kg−1) with a short charging/dischargin…
Metastasis is a multistep process that culminates in the spread of cells from a primary tumor to a distant site or organs. For tumor cells to be able to metastasize, they have to locally invade through basement membrane into the lymphatic and the blood vasculatures. Eventually they extravasate from the blood and colon…
Atomistic molecular dynamics simulations of a composite consisting of an ungrafted or a grafted spherical silica nanoparticle embedded in a melt of 20-monomer atactic polystyrene chains have been performed. The structural properties of the polymer in the vicinity of a nanoparticle have been studied. The nanoparticle m…
A novel method of rare-earth cation-assisted ligand assembly has been developed to provide upconversion nanophosphors with T(1)-enhanced magnetic resonance (MR), radioactivity, and targeted recognition properties, making these nanoparticles potential candidates for multimodal bioimaging. The process of modifying the s…
In this Article, we present our findings on the formation of metal sulfide nanocrystals from sulfur-alkylamine solutions. By pulsed field gradient diffusion NMR along with the standard toolbox of 1D and 2D NMR, we determined that sulfur-amine solutions used as a sulfur precursor exist as alkylammonium polysulfides at…
Thermally conductive functionalized multilayer graphene sheets (fMGs) are efficiently aligned in large-scale by a vacuum filtration method at room temperature, as evidenced by SEM images and polarized Raman spectroscopy. A remarkably strong anisotropy in properties of aligned fMGs is observed. High electrical (∼386 S…
The nucleation of graphene on a transition metal surface, either on a terrace or near a step edge, is systematically explored using density functional theory calculations and applying the two-dimensional (2D) crystal nucleation theory. Careful optimization of the supported carbon clusters, C(N) (with size N ranging fr…
A unique combination of low hysteresis, moderate magnetostriction at low magnetic fields, good tensile strength, machinability and recent progress in commercially viable methods of processing iron–gallium alloys make them well poised for actuator and sensing applications. This review starts with a brief historical not…
Ellipsometry is a highly sensitive optical technique for coating characterization but usually presents multiple solutions in many cases. To prevent these, a method with addition of a spectral polarimetric technique is proposed. An initial film dispersion curve, independently of its physical thickness, is then provided…
Abstract A novel pentamethylated norbornadiene (NBD) based dianhydride, α,α′‐bis‐(3,4,5,6,7‐pentamethylcyclopenta‐2,4‐dienyl)meta‐xylene‐1,2‐dianhydride (3), was prepared from α,α′‐bis‐(pentamethylcyclopentadienyl)meta‐xylene (1) and acetylene dicarboxylic acid. The bis‐adduct formed via Diels–Alder reaction afforded…
A new series of four mixed-ligand complexes of oxoperoxomolybdenum(VI) of the general composition [MoO(O2)(ma)(L)]·H2O, where maH = 3-hydroxy-2-methyl-4-pyrone and LH = o-acetoacetanisidide (o-aansH), o-acetoacetotoluidide (o-aatdH), acetylacetone (acacH) or methylactoacetate (macacH), has been synthesized by the inte…
Immersion of oxidized aluminum substrates in ethanol solutions of poly(acrylic acid) (PAA), followed by extensive solvent immersion, results in tenaciously chemisorbed, nanometer scale, controllable thickness films for a wide range of solution concentrations and molecular weights. Atomic force microscope images reveal…
Abstract We report on the preparation, structure, and magnetic properties of amorphous EuZrO 3 , an amorphous ferromagnetic oxide. The samples were prepared in the form of thin film through a pulsed‐laser‐deposition method and their structure was confirmed to be amorphous by X‐ray diffraction and high‐resolution trans…
Semiconductor heterostructures provide a fertile ground for fascinating physical behaviors that are not present in their respective bulk constituents. Here we demonstrate, by combining advanced transmission electron microscopy with atomistic first-principles calculations, that an atomic-scale Ti3SiC2-like bilayer can…
Abstract Two simple methods are described that utilize melt or dilute solution rheology in characterizing transfomations in molecular architecture induced on an originally linear PET during the early stages of reactive extrusion. A plausible senario for the shape variation and relative difficulty of the new polymers f…
Three new polyoxoniobates constructed from Lindqvist-type [Nb6O19]8− and copper–amine complexes, [Cu(1,2-dap)2]{[Cu(1,2-dap)2]2[Nb6O19H2]} · 10H2O (1), [Cu(1,3-dap)2]2{[Cu(1,3-dap)]2[Nb6O19]} · 10H2O (2), and [Cu(en)2]0.5{[Cu(en)2]2[Nb6O19H3]} · 12H2O (3) (1,2-dap = 1,2-diaminopropane, 1,3-dap = 1,3-diaminopropane, an…