Materials Literature
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Surface enhanced resonance Raman spectroscopy (SERRS) is a powerful molecular sensing tool that can be applied to a number of applications in the field of molecular diagnostics. We demonstrate that by using electron beam lithography to manipulate the nanoscale geometry of Ag split-ring resonators we can tune their opt…
Three catalytic oxidation reactions have been studied: The ultraviolet (UV) light induced photocatalytic decomposition of the synthetic dye sulforhodamine B (SRB) in the presence of TiO(2) nanostructures in water, together with two reactions employing Au/TiO(2) nanostructure catalysts, namely, CO oxidation in air and…
We use the functional renormalization group to analyze the phase diagram of a four-band model for the iron pnictides subject to band interactions with certain ${A}_{1g}$ momentum dependence. We determine the parameter regimes where an extended $s$-wave pairing instability with and without nodes emerges. For electron d…
Self-resonance in the atomic vibration occurs when the average wavelength of the phonon thermal vibration is equivalent or harmonic of the diameters of the atoms. It is suggested that applying pressure at temperature corresponding to the self-resonance should effectively reduce the number of vacancies. This theoretica…
On the basis of the spin-polarized density functional theory calculations, we demonstrate that partially open carbon nanotubes (CNTs) observed in recent experiments have rich electronic and magnetic properties which depend on the degree of the opening. A partially open armchair CNT is converted from a metal to a semic…
Influence of Cd and Se atoms on the quantum efficiency of photon emission through EL2 defects in gallium arsenide single crystals has been investigated. A comparative technique of impurity diffusion in vacuum and arsenic atmospheres has been used. The change character and extent of the photon emission quantum efficien…
While it has been shown that scandium (Sc) can be used for making high-quality Ohmic contact to the conduction band of a carbon nanotube (CNT) and thus for fabricating high-performance n-type CNT field effect transistors (FETs), the cost for metal Sc is currently five times more expensive than that for gold and one th…
A discrete dysprosium cubane has been prepared and structurally characterized. Slow relaxation of magnetization in this complex is observed, which may stimulate further investigations into the dynamics of magnetization in lanthanide clusters with different topologies.
Sensitized red-to-blue upconversion with a record 0.8 eV anti-Stokes shift has been achieved utilizing platinum(II) tetraphenyltetrabenzoporphyrin (PtTPBP) as the triplet sensitizer and perylene as the energy acceptor/annihilator in deaerated benzene. Selective 635 nm excitation of PtTPBP results in the observation of…
The control of magnetization via the application of an electric field, known as magnetoelectric coupling, is among the most fascinating and active research areas today. In addition to fundamental scientific interest, magnetoelectric effects may lead to new device concepts for data storage and processing. There are sev…
Low strain hardening has hitherto been considered an intrinsic behavior for most nanocrystalline (NC) metals, due to their perceived inability to accumulate dislocations. In this Letter, we show strong strain hardening in NC nickel with a grain size of approximately 20 nm under large plastic strains. Contrary to commo…
The capacity to biomineralize is closely linked to the rapid expansion of animal life during the early Cambrian, with many skeletonized phyla first appearing in the fossil record at this time. The appearance of disparate molluscan forms during this period leaves open the possibility that shells evolved independently a…
The use of nanoparticles--particles with size approximately 1-100 nm is increasing worldwide. This is particularly the case for applications of titanium dioxide nanoparticles (nano-TiO(2)) in consumer products, which have expanded at a fast rate in the last decade. The properties of nano-TiO(2) differ significantly fr…
Look, no hands! Non-supported macroscopic aerogels are fabricated from platinum, gold, and silver, and from bimetallic mixtures of gold/silver and platinum/silver. The hydrogels and aerogels consist of voluminous porous networks of particles or wires that are only a few nanometers thick. These entirely new structures…
This study reports the result of an investigation into the effects of chiral vector of carbon nanotubes (CNTs) and modulus of matrix on the interfacial stresses of CNT-reinforced composites. Based on the molecular structural mechanics approach, the assumption that CNTs and matrix are perfectly bonded to each other, an…
Abstract A new monomer, N,N ′‐bis(4‐phenoxybenzoyl)‐ p ‐phenylenediamine (BPBPPD), was prepared by the condensation of p ‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N ‐dimethylacetamide (DMAc). Novel aromatic poly(ether amide amide ether ketone ketone)s (PEAAEKKs) were synthesized by electrophilic Friedel–Cr…
Stellated Au/Ag nanoparticles have been synthesized in ascorbic acid in the presence of CTAB using Ag nanoparticles as seeding points. The composition of the materials obtained has been characterized by EDX. High-resolution transmission electron microscopy has been employed to analyze the structure of the nanoparticle…
ABSTRACT In this work, the addition of different amounts of chitosan during cheese making, combined with modified atmosphere packaging (MAP) was used to prolong the shelf life of stracciatella cheese. On the packaged cheese stored at 4C microbiological, pH, gas composition and sensorial changes were monitored over an…
We observe a seemingly complex magnetic field dependence of the dielectric constant of hexagonal YbMnO(3) near the spin ordering temperature. After rescaling, the data taken at different temperatures and magnetic fields collapse on a single curve describing the sharp anomaly in nonlinear magnetoelectric response at th…
Abstract UV‐curable fluorinated organic–inorganic hybrid coatings were prepared by the sol–gel technique. Perfluorinated urethane modified alkoxysilane was synthesized by the reaction between perfluoro alcohol and 3‐isocyanatopropyltrimethoxysilane. The prepared formulations were applied onto poly(methyl methacrylate)…