Materials Literature
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Fluoride clusters of lanthanoids can be prepared in organic solvents by metathetical reactions of Ln(SePh)3 with NH4F. The first products of these reactions, [(py)24Ln28F68(SePh)16] (Ln=Pr, Nd; py=pyridine; see structure), are currently the largest discrete lanthanoid clusters ever isolated. Emission experiments on th…
Abstract An efficient and highly selective synthesis of 2‐arylbenzimidazoles by condensation of a wide range of aryl aldehydes bearing electron‐donating or ‐withdrawing substituents and phenylenediamines in a single pot using a catalytic amount of ( meso ‐tetrakis( o ‐chlorophenyl)porphyrinato)iron(III) chloride (5 mo…
Ex situ synthesis is the key: Palladium nanoparticles having a narrow size distribution around 3.6 nm have been synthesized in a liquid phase and then loaded onto a carbon support with an overall efficiency of 85 %. The resulting nanoparticles, which retained their size and morphology, were exceptionally active and se…
The growth of bacterial-cellulose nanofibrils on the surfaces of micrometer-scale natural fibers provides a route to a new class of hierarchical, renewable, degradable composites. The nanofibrils improve the interaction between the primary fibers and the matrix, leading to improved mechanical properties and water resi…
The Co(III)--salen-catalyzed (salen=N,N'-bis(salicylidene)ethylenediamine dianion) hydrolytic kinetic resolution (HKR) of racemic epoxides has emerged as a highly attractive and efficient method of synthesizing chiral C(3) building blocks for intermediates in larger, more complex molecules. HKR reaction rates have dis…
Raman spectroscopic investigations are carried out on one-dimensional nanostructures of InN,such as nanowires and nanobelts synthesized by chemical vapor deposition. In addition to the optical phonons allowed by symmetry; A1, E1 and E2(high) modes, two additional Raman peaks are observed around 528 cm-1 and 560 cm-1 f…
Rough and clean: The physical interaction and self-assembly of oligo(p-phenylenevinylene)s (OPVs) on carbon nanotubes (CNTs) allow the dispersion of the latter in organic solvents. This well-dispersed nanocomposite can be coated on to glass, metal, and mica surfaces to give superhydrophobic self-cleaning surfaces with…
Dynamical Coherent-Potential Approximation (CPA) to correlated electrons has been extended to a system with realistic Hamiltonian which consists of the first-principles tight-binding Linear Muffintin Orbital (LMTO) bands and intraatomic Coulomb interactions. Thermodynamic potential and self-consistent equations for Gr…
The physics of the "Pi" phase shift in ferromagnetic Josephson junctions enables a range of applications for spin-electronic devices and quantum computing. In this respect our research is devoted to the evaluation of the best materials for the development and the realization of the quantum devices based on superconduc…
Abstract This article presents a comprehensive review of recent progress of research dedicated to low‐dimensional nanomaterials constructed from functional low‐molecular‐weight organic compounds, whose optoelectronic properties are fundamentally different from those of their inorganic counterparts. After introducing t…
Composite ceramic materials reinforced with carbon fibers are interesting materials because of their excellent mechanical and thermo-physical properties, which make them appropriate for many applications, including re-entry shields, rocket nozzles, disc brakes, and prosthetic devices. For all these purposes, many diff…
Phonon of the single-wall MS2 (M = Mo,W) nanotubes with diameters up to 50 nm are systematically calculated using the full symmetry implemented valence-force-field model. Infrared and Raman active modes are singled out by the symmetry, and their applications in the experimental sample characterization are discussed. R…
The present investigation deals with the synthesis of N-doped aligned bamboo-shaped carbon nanotubes (CNx) by chemical vapour deposition of monoethanolamine/ferrocene mixture on quartz substrate over the temperature range 700–900 °C. All nanotubes exhibited bamboo-like morphology with transverse carbon bridges forming…
A method for the experimental determination of the absolute efficiency of wavelength dispersive spectrometers was developed, based on the comparison of spectra measured with a wavelength dispersive system and with an energy dispersive spectrometer. The aim of studying this parameter arises because its knowledge is nec…
Purpose The objective of this paper is to develop an actuation system utilizing smart materials such as shape memory alloys (SMA) to control the position of an aircraft's flaps. Design/methodology/approach The proposed smart wing consisted of SMA springs that were fixed at one end to the wing box toward the leading ed…
Lactide-co-glycolide-based functionalized nanoparticles (NPs), because of their high surface areas for conjugation and biodegradability, are attractive as carriers for stabilization and sustained delivery of therapeutic agents and protein drugs. The objective of this work was to compare the release characteristics of…
The zinc-doped maghemite nanoparticles were prepared using ultrasonic radiation. As a precursor, a suspension of maghemite in an alkaline aqueous solution of zinc nitrate at pH = 9 was sonicated. They were investigated by x-ray diffraction, Mössbauer spectroscopy, high-resolution electron microscopy (HREM), and superc…
We report a new organic−inorganic hybrid templating approach to synthesize micrometers-long, 50−230 nm diameter single-crystal nanorods of lead telluride. Lead telluride nanorods were synthesized using tellurium nanotubes as consumable templates. The nanorod aspect ratio is tunable by altering the reaction parameters…
Carbon nanotubes and carbon nanospheres have been selectively synthesized in a polypropylene matrix by simply altering the catalyst precursor. When a mixture of ferrocene and cobalt (II) acetate was added to the polypropylene, well-dispersed carbon nanotubes were produced. When only cobalt (II) acetate was added, howe…
A new and facile method involving an ion milling technique to fabricate silver nanoplates with different thicknesses is introduced. The thickness of the silver nanoplates can be tuned from 70 to 10 nm by controlling the ion milling time. The experimental and calculated results demonstrate that this thickness control a…