Materials Literature
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Two polypyridyl ruthenium complexes, bis[4-(N,N'-diphenylamino)phenyl-2,2':6',2''-terpyridine]ruthenium(II) (1) and bis[4'-(4-{2-[4-(N,N'-diphenylamino)phenyl]ethylene}phenyl)-2, 2':6',2''-terpyridine]ruthenium(II) (2), have been synthesized. They possess an extended conjugation and strongly coupled electronic states.…
We present detailed (57)Fe Mössbauer effect spectroscopy (MS) measurements at various temperatures for Ba(Fe(1-x)Ni(x))(2)As(2). The isomer shift values for all samples are in the range of 0.42 ± 0.02 mm s(-1), indicating a typical metallic state of divalent Fe ions. The MS spectra of the magnetic samples (up to x = 0…
Cellulose, the most widespread biopolymer, is known to occur in a wide variety of living species from the worlds of plants and microbial sources like bacteria. Bacterial cellulose produced by Gluconacetobacter xylinus in the form of long fibers can be acid hydrolyzed under controlled conditions to obtain nanocrystals.…
Linear assembles of BN nanosheets (LABNs) were fabricated in polysiloxane/BN nanosheet composite film under a high DC electric field. The hexagonal BN nanosheets were dispersed by sonication in a prepolymer mixture of polysiloxane followed by a high-speed mixing. The homogeneous suspension was cast on a spacer of micr…
High-pressure experiments on the $R{\text{NiO}}_{3}$ perovskites with smaller rare-earth ${R}^{3+}$ ions complete our study of the crossover from itinerant to localized $e$-electron behavior associated with the low-spin $\text{Ni}(\text{III}):{t}^{6}{e}^{1}$ ion. By measuring second-sintered samples in a multianvil mo…
A nonemulsion method to prepare spherical, monodisperse nanoparticles of bridged polysilsesquioxanes was developed. This is the first method to fabricate uniform spherical bridged polysilsesquioxanes from monomers with low to moderate hydrophilicity. The average particle size can be systematically controlled from ∼20…
Reported are the synthesis, the structural characterization, and the electronic band structures of two new Zintl phases: BaGa2P2 and BaGa2As2. Both compounds are isoelectronic and isotypic and crystallize in a monoclinic system with a new structure type (Pearson symbol mP20). The structures have been established by si…
The H(NH(2)BH(2))(n)H oligomers are possible products from dehydrogenation of ammonia borane (NH(3)BH(3)) and ammonium borohydride (NH(4)BH(4)), which belong to a class of boron-nitrogen-hydrogen (BNH(x)) compounds that are promising materials for chemical hydrogen storage. Understanding the kinetics and reaction path…
Optimum spinning machine parameter selection among feasible alternatives with different significance is a multi-criteria decision-making problem. Statistical analysis is a conventional method that is used in such a problem. However, the preferences of the producer about the yarn properties needed to obtain an end prod…
We introduce a three-parameter step-response function which is based on a generalization of the Cole-Davidson (CD) and Kohlrausch (K) functions, and which provides a highly flexible susceptibility description for viscous liquids. A second parameter α characterizing the overall width, in addition to a parameter β deter…
Long-time dynamical decoupling and quantum control of qubits require high-precision control pulses. Full characterization (quantum tomography) of imperfect pulses presents a bootstrap problem: tomography requires initial states of a qubit which cannot be prepared without perfect pulses. We present a protocol for pulse…
We report on the coexistence of magnetic and superconducting states in ${\text{CeFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ for $x=0.06(2)$, characterized by transition temperatures ${T}_{m}=30\text{ }\text{K}$ and ${T}_{c}=18\text{ }\text{K}$, respectively. Zero-field and transverse-field muon-spin-relaxation measurem…
Electron spin relaxation dynamics in colloidal ZnO quantum dots containing additional delocalized conduction band electrons (n-type) have been studied using electron paramagnetic resonance (EPR) spectroscopy. Variation of the 67 Zn ( I = 5/2) nuclear isotope content within the quantum dots allows the effects of the el…
In order to obtain the favoured material properties for a particular application, it is important to know how the material performance changes with the filler content under given loading conditions. In this study, a series of bamboo fiber reinforced epoxy composites are fabricated using conventional filler (aluminium…
We report the fabrication of and investigations into the dielectric and thermal properties of epoxy/boron nitride nanotube (BNNT) composites. It was found that BNNT fillers can effectively adjust the dielectric constant of epoxy. Moreover, the thermal conductivity of epoxy was improved by up to 69 % with 5 wt % BNNTs.…
In this work we report a one-step method for the fabrication of poly(ethylene glycol) PEG-like chemical gradients, which were deposited via continuous wave radio frequency glow discharge plasma polymerization of diethylene glycol dimethyl ether (DG). A knife edge top electrode was used to produce the gradient coatings…
A detailed spectroscopic study of the upconversion properties in ${\text{Mn}}^{2+}{\text{-Yb}}^{3+}$ codoped ${\text{LaMgAl}}_{11}{\text{O}}_{19}$ is presented. Pulsed and continuous-wave infrared excitation in the ${^{2}\text{F}}_{7/2}\ensuremath{\rightarrow}{^{2}\text{F}}_{5/2}$ ${\text{Yb}}^{3+}$ absorption peaks i…
The electrochemistry and the electrogenerated chemiluminescence (ECL) of the BODIPY species (2,6-diethyl-1,3,5,7-tetramethyl-8- n -pentyl-4,4-difluoro-4-bora-3a,4a-diaza- s -indacene, i.e., B 8 - n -pentyl), an aromatic monomer (B 8 -phenyl), and a closely related dimer were examined. The B 8 - n -pentyl species with…
The unique features of axial, torsional, transverse and radial breathing vibrations are captured for armchair and zigzag singlewalled boron nitride nanotubes (BNNTs) based on molecular mechanics simulations and continuum mechanics theories. Equivalent Young's modulus 1 TPa and shear modulus 0.4 TPa are obtained indepe…
Rice husk, a form of biomass material, is a potential source of renewable energy. Recovering silica from rice husk is an important element in manufacturing high value-added products and ensures efficient utilization of a bioresource. This paper describes the kinetics and characteristics of silica prepared from rice hu…