Materials Literature
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The surface-enhanced Raman excitation profiles (REPs) of rhodamine 6G (R6G) on Ag surfaces are studied using a tunable optical parametric oscillator excitation source and versatile detection scheme. These experiments afford the ability to finely tune the excitation wavelength near the molecular resonance of R6G (i.e.,…
1. Glassy dynamics of liquids 2. Correlation functions 3. Elements of liquid dynamics 4. Foundations of the mode-coupling theory 5. Extensions of the mode-coupling theory 6. Asymptotic relaxation laws Appendices
Azido has been one of the well used bridging ligands in the construction of magnetic molecule materials, which has stimulated considerable interest in magnetochemistry. This tutorial review is concentrated on the study of azido metal compounds with their magnetochemistry and consists of eight main sections. The first…
Structural disulfide bonds are a typical feature of secretory proteins and are often required for protein folding and stability. Formation of a disulfide bond from a cysteine pair in a newly synthesized protein is a redox reaction that requires the interaction of the folding protein with an oxidant ...
A series of Ni 2+ −Co 2+ −Fe 2+ −Fe 3+ −SO 4 2− layered double hydroxide precursors with different Ni/Co ratios have been synthesized by a method involving separate nucleation and aging steps. After calcination at 900 °C, the corresponding Ni 1- x Co x Fe oxides were obtained. Vibrating sample magnetometry indicated t…
A photon-energy-dependent experimental study of the ${L}_{2,3}{M}_{2,3}{M}_{2,3}$ Auger transitions in argon clusters is presented, and features without atomic counterparts are observed in the spectra up to photon energies at least $30\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ above the ${L}_{2,3}$ threshold. We propose…
We report a comprehensive study of transport, magnetotransport, and magnetic properties of single crystals of ${\text{BaVSe}}_{3}$. The paramagnetic metal-ferromagnetic metal transition at 43 K was followed as a function of pressure by measuring the electrical resistivity and the thermoelectric power. The exponent of…
Galvanic cells with CaF 2 single crystal as electrolyte were utilized to determine the thermodynamic quantities of the solid-state process: δNdNi 5 (μm) + MWCNT = {MWCNT−[NdNi 5 (nm)] δ } where multiwalled carbon nanotubes (MWCNT) react with NdNi 5 which is the catalyst of the chemical vapor deposition (CVD) synthesis…
A new polymerization technique that allows for the first-ever synthesis of poly(phenylenedicyanovinylene)s (PPCN2Vs) is described. PPCN2Vs, with their high electron affinities and structural versatility, seem ideally suited to address the need for new n-type polymers. Remarkably the polymers presented herein become mo…
We discuss molecular dynamics simulations for several types of polymeric liquid crystals. Dendrimers with a variety of mesogenic attachments are studied in isotropic, nematic and smectic A solvents, with an emphasize on the coupling between molecular shape and the structure of the phase. The structure and dynamics of…
We investigated the magnetic and ferroelectric properties of c-axis oriented orthorhombic phase HoMnO(3) (o-HMO in Pbnm symmetry setting) thin films grown on Nb-doped SrTiO(3)(001) substrates. The o-HMO films exhibit an antiferromagnetic ordering near 42 K, irrespective of the orientation of the applied field. However…
A presentation about natural fibre composites
Abstract The tribological behavior of epoxy/polyurea composite under dry friction was investigated. The worn surface morphologies of epoxy and epoxy/polyurea composite have been analyzed using scanning electron microscopy (SEM), and the functional group of epoxy and epoxy/polyurea composite before and after wear have…
A novel approach based on Coulomb explosion has been developed to separate single-walled carbon nanotubes (SWNTs) from their bundle. With this technique, we can readily separate a bundle of SWNTs into smaller bundles with uniform diameter as well as some individual SWNTs. The separated SWNTs have a typical length of s…
A novel rheological technique was developed to synthesise Gd substituted Zn–Cu–Cr ferrites, Zn 0·6 Cu 0·4 Cr 0·5 Gd x Fe 1·5−x O 4 ( x=0·00, 0·02, 0·04, 0·06, 0·08) powders. The effects of the Gd substitution on the structural and magnetic properties of the as prepared Zn–Cu–Cr ferrites were investigated. The microstr…
This article describes how a fiber-optic turbidity probe may be used as an inferential sensor to aid in the control of commercial-scale batch crystallizations. The discussion focuses on several unseeded crystallization examples involving cooling or cooling plus addition of antisolvent. In a typical control scheme, the…
Co30Fe70 nanocrystallites have been synthesized by alkalide co-reduction of Co2+ and Fe3+. As produced, the material consists of highly pyrophoric 4.0 nm nanocrystals with a narrow (<12%) size distribution, that are superparamagnetic with an average blocking temperature <TB> of ∼20 K prior to removal of the by-product…
Photochemical processes leading to the photoinduced anisotropy and the excellent photoaligning properties of bis-methacrylic polymers are discussed. Comparing the data for bis-methacrylic polymers and a series of model compounds, we conclude that Fries rearrangements and crosslinking reactions taking place in bis-meth…
Small-angle X-ray scattering has been used to investigate the nanostructures in precipitated phases of carboxymethylcellulose/oppositely charged C(n)TAB surfactants mixtures in interaction with bivalent copper ions. In copper-free precipitates, a transition from a 2D hexagonal phase H(I) to a micellar cubic surfactant…
As the main influencing factors for instability of film lines are widely used in microelectromechanical systems, buckle-driven delamination and electromigration of film lines on polymer substrate under electrical loading are reported in this letter. The critical buckling condition is obtained through Euler formula. In…