Materials Literature
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Single crystals of CeFeAsO, large enough to study the anisotropy of the magnetic properties, were grown by an optimized Sn-flux technique. The high quality of our single crystals is apparent from the highest residual resistivity ratio (RRR)≈12, reported among undoped R FeAsO compounds ( R =rare earth) as well as sharp…
A recently developed atomistic method capable of calculating the fragile (non-Arrhenius) temperature behavior of highly viscous liquids is further tested by studying a model of SiO(2), a glass former well known for its Arrhenius temperature behavior (strong). The method predicts an Arrhenius temperature variation, in…
The nanoscale spatial organization of collagen fibrils as major constituents of extracellular matrices is believed to be crucial for neurite guidance in neural development and repair. To systematically study the influence of collagen fibril alignment, length, and density on human neuronal cell behavior, we used our no…
Nano-fibrous scaffolds which could potentially mimic the architecture of extracellular matrix (ECM) have been considered a good candidate matrix for cell delivery in tissue engineering applications. In the present study, a semicrystalline diblock copolymer, poly(epsilon-caprolactone)-block-poly(L-lactide) (PCL-b-PLLA)…
Abstract Herein, we perform a comparative study on the addition of azomethine ylides to graphene, carbon nanotubes, C 60 , ethene, pyrene and a C 48 H 18 hydrocarbon. The calculated binding energies and free energy corrections suggest that the addition of azomethine ylide to perfect graphene is not spontaneous (ΔG >…
We report on the use of highly transmissive single-walled carbon nanotube (SWNT) films as electrodes in electrochromic devices that employ a dual n - and p -type dopable donor−acceptor polymer, poly[5,8-bis-(3-dihydro-thieno[3,4- b ][1,4]dioxin-5-yl)-2,3-diphenyl-pyrido[3,4- b ]pyrazine], or poly(bisEDOT-PyrPyr-Hx 2 )…
Five new, unsymmetrical 1,4-distyryl-2,5-bisphenylethynylbenzenes (cruciforms, XF) have been prepared by a sequential Horner reaction of the bisphosphonate of 2,5-diiodo-1,4-xylene with two different aromatic aldehydes. The obtained diiodide was coupled to phenylacetylene under Sonogashira conditions with (Ph(3)P)(2)P…
A general and versatile method for the functionalization and subsequent modification of single dispersed magnetite nanoparticles by direct reaction of alkoxysilanes on the particle surface is reported. Our data supports the formation of a dense monolayer that is controlled by sterical needs. By selecting the functiona…
The magnetoelectric response and its quantum relaxation phenomenon have been investigated for a single crystal of yttrium iron garnet. The electric-dipole moments, built in by excess localized electrons forming ${\text{Fe}}^{2+}$ sites, never freeze even at the lowest temperature and relax through a quantum tunneling…
Mesoscopic tubular potential is developed for the description of the van der Waals interaction between straight single-walled carbon nanotubes (CNTs) of arbitrary length and orientation. The potential is formulated within a general continuum description of the van der Waals intertube interactions based on the integrat…
Abstract An improved strategy to synthesize oligo(ethylene glycol)‐based secondary generation (G2) dendron is presented. The overall synthesis efficiency increased by 50% when comparing to the previous method, and the product purification by column chromatography becomes much easier. Based on this approach, the synthe…
We describe here a general synthesis approach for the preparation of new families of misfit layer compounds and demonstrate its effectiveness through the preparation of the first 64 members of the [(PbSe) 0.99 ] m (WSe 2 ) n family of compounds, where m and n are integers that were systematically varied from 1 to 8. T…
Abstract Poly( L ‐lactide) (PLLA)/multiwall carbon nanotube (MWNT) composites were prepared by the solvent‐ultrasonic‐casting method. Only very low concentrations of MWNTs (<0.08 wt %) were added in the composites. Isothermal and nonisothermal crystalline measurements were carried out on PLLA/MWNT composites to inv…
Abstract A series of poly(amino (meth)acrylate) brushes, poly(2‐(dimethylamino)ethyl methacrylate) (PDMAEMA), poly(2‐(diethylamino)ethyl methacrylate) (PDEAEMA), poly(2‐(dimethylamino)ethyl acrylate) (PDMAEA), poly(2‐( tert ‐butylamino)ethyl methacrylate) (PTBAEMA), has been synthesized via surface‐confined controlled…
A comprehensive electron energy-loss spectroscopy study of niobium (Nb) and stable Nb-oxide phases (NbO, NbO2, Nb2O5) was carried out. In this work (Part I), the plasmons and energy-loss near-edge structures (ELNES) of all relevant Nb edges (Nb-N2,3, Nb-M4,5, Nb-M2,3, Nb-M1, and Nb-L2,3) up to energy losses of about 2…
Nanodiamonds (NDs) have versatile applications in electro-optical devices, sensors, and biomedicine. Owing to the difficulty in activation of the inert sp(3) C-H bonds on the surface of NDs, it is not trivial to modify the surface functionalities on NDs. A few functionalization methods have been reported in the litera…
Development of a p-type TCO to rival the high-performance n-type TCOs presently utilized in many applications is one of the grand challenges for materials scientists. However, most of the p-type TCOs fabricated to date have suffered from limited hole mobilities, low conductivities, and indirect band gaps. Recently, [C…
In this paper, Co-Al layered double hydroxide (LDH) and montmorillonite (MMT) have been exfoliated into charged single layers in the solvent of formamide and water, respectively. The structures of individual layers of LDH and MMT were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The dela…
By rational design of the FeO(111)/Pt(111) inverse model catalyst and the control experiments, we report for the first time direct experimental evidence for the interfacial CO(ads) + OH(ads) reaction to produce CO(2) at the Pt-oxide interface at low temperatures, providing deep insights into the reaction mechanism and…
The origin of magnetism in undoped MgO has been studied based on density functional theory. It is shown that Mg vacancies can induce local moments in MgO while O vacancies cannot irrespective of the concentration. The origin of the local magnetic moments comes from the partially occupied ${e}_{g\ensuremath{-}}$ and ${…