Materials Literature
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Abstract A new silicon‐containing spiroorthoester, 1,4,6‐trioxaspiro [4,4]‐2‐nonylmethyl 3‐trimethylsilyl propionate (SOESi), was synthesized with good yield by an esterification reaction with a previously synthesized 2‐hydroxymethyl‐1,4,6‐trioxaspiro [4,4] nonane (SOEOH) and trimethylsilyl propionic acid. The struc…
Thermoinduced surface orientation behaviors were studied in situ by Fourier transform infrared spectroscopic (FTIR) measurements along with attenuated total reflection (ATR) and transmission methods during the cold crystallization of melt-quenched amorphous poly(pentamethylene 2,6-naphthalate) (PPN) film. The chain in…
The interfacial behavior of poly(isoprene-b-methyl methacrylate) diblock copolymers (PI-b-PMMA), with similar PMMA blocks but differing in the percentage of PI segments, SP19 (5% PI) and SP38 (52% PI), was studied at the air-water interface. The surface pressure-area (pi-A) isotherms, compression-expansion cycles, and…
The main aim of the present work is to show, for the case of glycerol, the connection between the macroscopic fragility parameter, defined as m = (d log eta)/(d(Tg/T))|T=Tg+, and the average number of H-bonds per molecule. Furthermore, the relation between the macroscopic and microscopic definitions of fragility, whic…
The hexaferrite system ${({\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x})}_{2}{\mathrm{Zn}}_{2}{\mathrm{Fe}}_{12}{\mathrm{O}}_{22}$ possesses a rich magnetic phase diagram and for strontium content $x=0.75$ exhibits a magnetoelectricity, the existence of which is intimately connected to the noncollinear arrangement…
The first hyperpolarizability of two tungsten-carbonyl complexes, tungsten pentacarbonyl pyridine and tungsten pentacarbonyl trans-1,2-bis(4-pyridyl)-ethylene, has been studied by the high-level TDDFT method. The consideration of the solvent effect and intermolecular pi-pi weak interaction in the calculations quantita…
The valley-orbit splitting in silicon quantum dots with shallow donors has been theoretically studied. In particular, the chemical-shift calculation was carried out within the frames of $\mathbf{k}∙\mathbf{p}$ approximation for single- and many-donor cases. For both cases, the great value of the chemical shift has bee…
In this paper we present a novel and facile method to fabricate polystyrene/nickel (PS/Ni) nanocomposite spheres. In this approach, the negatively charged PS colloids bearing −COOH groups on the surfaces were used as templates, and the Ni 2+ ions and a small amount of Ag + ions were then adsorbed onto the surfaces of…
Small-angle neutron scattering (SANS), cryogenic transmission electron microscopy (cryo-TEM), and dynamic light scattering (DLS) were used to study the metal-dependent phase behavior of microbially produced surfactants-marinobactins B, D, and E (MB, MD, and ME). Marinobactins A-E are siderophores that facilitate Fe(II…
Aqueous-organic two-phase systems are important tools in organic synthesis to enable reactions that employ compounds with incompatible solubilities. For technical application, different strategies have been developed to prevent coalescence without vast energy input and deactivation of sensitive compounds. A particular…
CgNa (Condylactis gigantea neurotoxin) is a 47-amino-acid- residue toxin from the giant Caribbean sea anemone Condylactis gigantea. The structure of CgNa, which was solved by 1H-NMR spectroscopy, is somewhat atypical and displays significant homology with both type I and II anemone toxins. CgNa also displays a conside…
Recently it was discovered that a total of $5.6\phantom{\rule{0.3em}{0ex}}\mathrm{wt.}\phantom{\rule{0.2em}{0ex}}%$ ${\mathrm{H}}_{2}$ could be released from the 1:2 mixture of lithium amide and magnesium hydride at temperatures as low as $150\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. W…
In this work, we performed a detailed study of the Raman spectra of double-wall carbon nanotube (DWNT) bucky paper samples. The effects of ${\mathrm{H}}_{2}\mathrm{S}{\mathrm{O}}_{4}$ doping on the electronic and vibrational properties of the DWNTs are analyzed and compared to the corresponding effects on single-wall…
Water plays an important role in the structure and function of biomolecules. Water confined at the nanoscale usually exhibits phenomena not seen in bulk water, including the ice-like ordering structure on the surfaces of many substrates. We investigate the behaviour of protein folding in which the proteins are assumed…
Abstract Poly[di(2,5‐dimercapto‐1,3,4‐thiadiazole)]‐metal complexes of Co(II), Ni(II), Cu(II), and Zn(II) were synthesized by the reaction of 2,5‐dimercapto‐1,3,4‐thiadiazole (6.6 mmol) with anhydrous cobalt, nickel, copper, and zinc chlorides (3.3 mmol) in absolute ethanol under reflux for 24 h. The products were cha…
This article reports the modification of Al2O3/GaAs surfaces with multifunctional soft materials. Siloxane elastomers were covalently bound to dopamine-modified Al2O3/GaAs semiconductor surfaces using MPt (M = Fe, Ni) nanoparticles. The sizes of the monodisperse FePt and NiPt nanoparticles were less than 5 nm. The sur…
Alternating poly(m-p-aniline) can be oxidized to radical cations with spins S = 1/2. For high spin density, ferromagnetic spin interaction is observed, and some of the generated radical cations are found to be in a ground triplet state.
In the present study 3D finite element (FE) analysis has been used to evaluate Young's modulus, shear modulus and coefficient of thermal expansion (CTE) of single-walled carbon nanotubes (SWCNTs). Both armchair and zigzag SWCNTs have been analyzed and some important observations have been made in regard to dependence…
Abstract Using a complementary pair of simple alkylthiolates with hydrogen‐bonding moieties, functionalized Au 55 clusters could be selectively deposited onto self‐assembled monolayers on gold that carry the opposite functionality. The deposition can be readily controlled by the medium in which the clusters are dissol…
A tunable near-field superlens (NFSL) from metal-dielectric composites has advantages over that one from bulk metal. In this paper, we realize the tunable NFSL by tuning the shape of granular inclusions. It is found that the tunability of NFSL can be enhanced by adjusting both the volume fraction and the particles' sh…