Materials Literature
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Gd 5 ( Si x Ge 1 − x ) 4 exhibits a field induced first order phase transition from a monoclinic paramagnetic to an orthorhombic ferromagnetic at temperatures above its Curie temperature for 0.41≤x≤0.51. The field required to induce the transition increases with temperature. This field induced first order phase transi…
Abstract We succeeded in observing the similar solid‐state NMR spectra ( 1 H‐magic‐angle spinning NMR spectra) of fluoroalkyl end‐capped N ‐(1,1‐dimethyl‐3‐oxobutyl)acrylamide oligomer [R F ‐(DOBAA) n ‐R F ]/silica gel nanocomposite before and even after calcinations at 800°C. This finding suggests that R F ‐(DOBAA) n…
Chemical vapor deposition of bis(ethylcyclopentadienyl)manganese, (EtCp) 2 Mn, was performed on a patterned interconnect structure to obtain a thin conformal layer with a good diffusion barrier property for advanced Si devices. Deposition of (EtCp) 2 Mn on SiO 2 formed a conformal layer of Mn oxide within a contact ho…
This paper reports on the directed monolayered assembly of 2 nm colloidal gold nanoparticles onto charge patterns written by atomic force microscopy (AFM) on poly(methylmethacrylate) thin films with a sub-100-nm spatial resolution. The impact of key experimental parameters (surface potential of charge patterns, immers…
Phenanthrenequinone (PHQ) is a photoproduct of phenanthrene, one of the most prevalent polycyclic aromatic hydrocarbons in the environment. Phenanthrenequinone is a compound of substantial interest, because its toxicity can be much greater than its parent chemical to aquatic organisms. The toxicity mechanisms of PHQ t…
Au and Pt nanoparticle distributions within hierarchically ordered mesoporous TiO2 were explored using a combination of techniques including ellipsometric porosimetry (EP) and X-ray photoelectron spectroscopy (XPS). EP studies were used to examine adsorbate-TiO2 interactions and the influence of adsorbate polarity upo…
Configuration interaction calculations have been applied to the study of the magnetic coupling in bis-nitronyl nitroxide radicals with benzene bridges. Molecular orbitals obtained with different localization schemes have been considered in the generation of the CI space, with the aim of investigating the role played b…
Abstract Polymer composites consisting of poly(butylene succinate) (PBS) as matrix and corn starch (CS) or cellulose filler (CF) with a small amount of furfural (FR) from biomass were prepared by a hot‐pressing method at 120°C from a powder mixture. Mechanical properties of the composites' films were investigated usin…
This work reports a systematic study of the aggregation behavior and structural properties of micelles formed by a selectively deuterated h -polystyrene- d -polybutadiene ( h -PS10- d -PB10, where 10 denotes the approximate block molecular weight in kilograms per mole) block copolymer in a series of n -alkanes, C n H…
CoFe 2 O 4 nanoparticles prepared by chemical coprecipitation method in a magnetic field exhibit novel magnetic properties. The average particle diameter was about 2 nm and larger depending on the post annealing temperature. Magnetization measurements indicate that smaller nanoparticles are superparamagnetic above the…
X-ray vision: Single-crystal XRD experiments (see picture) reveal the excited-state structure of the photomagnetic heterobimetallic title complex. The system shows a decrease in all the iron-ligand bond lengths, suggesting that photoexcitation involves a ligand-to-metal charge transfer or a change in the superexchange…
o-terphenyl is one of the organic liquids in which a fast mode of crystal growth is activated near the glass transition temperature T(g) and continues deep in the glassy state. This growth mode, termed glass-crystal (GC), is not limited by molecular diffusion in the bulk liquid, in contrast to the diffusion-controlled…
We demonstrate high-efficiency ultraviolet (UV) laser generation in a nonlinear optical crystal BaAlBO3F2 (BABF); 355 nm UV light was generated by using a type I BABF crystal as a sum-frequency mixing of the fundamental light and the second harmonic from a picosecond Nd:YAG laser operated at a repetition rate of 10 Hz…
Using an in situ Diels−Alder (DA) “click chemistry” strategy for reactions between anthracene and maleimide functional groups, two prototypes of novel nonlinear optical (NLO) side-chain polymers ( PMI-A7 and PMI-B7 ) containing highly hyperpolarizable but chemically sensitive phenyltetraene-based chromophores were syn…
Here we report synthesis of CdSe quantum dots (QDs) by evaporation of bulk CdSe using the solvated metal atom dispersion method (SMAD), followed by reflux in toluene and in t -butyltoluene (TBT). The as-prepared SMAD product exhibits broad photoluminescence spectra (PL), but upon reflux in toluene or t -butyltoluene,…
The exchange-coupling constants in dinuclear 1,1-azidonickel(II) complexes and in one tetranuclear complex have been analyzed by using electronic structure calculations based on density functional theory. The calculated J values show a correlation with the Ni-N-Ni angle; however, the available experimental data do not…
Relaxation enthalpies in the vicinity of glass transitions were recorded on the basis of the heat capacity curves measured in nine glass-forming molecular liquids and solutions in the well defined cooling and subsequent heating cycles. It is observed that enthalpy hysteresis in the cooling/heating cycles is less signi…
The dielectric and magnetic properties and their correlations were investigated in polycrystalline perovskite ${\text{LaCoO}}_{3\ensuremath{-}\ensuremath{\delta}}$. The intrinsic bulk and grain-boundary (GB) dielectric relaxation processes were deconvoluted using impedance spectroscopy between 20 and 120 K, and resist…
Abstract Debye temperatures and Grueneisen parameters of chain TlSe and TlInSe 2 were calculated using our earlier obtained ab‐initio results on phonon band structure and existed experimental data on thermal expansion coefficient. For both compounds, the values of heat capacity at constant volume (C v ) were found to…
Abstract In this article, epoxidized carbon nanotubes (CNTs) are used to modify current epoxy resins. The produced epoxy groups on the nanotube surface significantly enriched nanotube chemistry and made them soluble in the organic solvents. Atomic force microscopy characterization indicated that epoxidized nanotubes w…