Materials Literature
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Introduction An emulsion is a system of dispersed droplets of one immiscible liquid in another. Simple emulsions are either oil-in-water (o/w) or water-in-oil (w/o). Emulsions can be defined as colloidal systems, although emulsion droplets are usually larger than the range specified for a colloidal system, i.e. diamet…
We present results from first-principles calculations of ternary transition metal carbides in the ${M}_{3}\mathrm{Si}{\mathrm{C}}_{2}$ series (where $M=\text{early}$ transition metal). We predict structural and mechanical properties of these new ${M}_{\mathrm{N}+1}A{X}_{\mathrm{N}}$ phases. The bulk modulus of the ter…
We perform extensive Potts model simulations of three-dimensional dry foam coarsening. Starting with 2.25 million bubbles, we have enough statistics to fulfill the three constraints required for the study of statistical scale invariance: first, enough time for the transient to end and reach the scaling state; then, en…
The structural and energetic properties of the $\mathrm{Pb}\mathrm{Te}∕\mathrm{Cd}\mathrm{Te}(100)$, (110), and (111) interfaces are investigated using an ab initio pseudopotential method within a slab approximation. A scheme is proposed to calculate interface energies for polar faces with a resulting dipole moment. T…
The worm turns: Carbon nanotubes (CNTs) are encapsulated within predesigned, wormlike, hollow silica capsules (see image). The preparation strategy comprises a two-step process; silica coating of the CNTs is followed by selective dissolution from the inside out. The silica coating involves the initial deposition of a…
Reduction of interior noise in modern automobiles is an important issue in the automobile industry. Textiles are one solution, as they can provide passive sound absorption in upholstery, headliners and other interior parts. Nonwovens have also been used, but they have a lesser aesthetic appearance and drapability comp…
The results of a detailed theoretical investigation of the phase behavior of A m - b -(B- b -A) n multiblock copolymer melts are presented for the special case of m = 20 and n = 10. The presence of two strongly different molecular length scales results in the formation of a large-length-scale lamellar structure of alt…
A racemic liquid of opposite enantiomers usually crystallizes as a racemic compound (racemate), rarely as a conglomerate, and even more rarely as a solid solution. We discovered a Type II solid solution (mixed crystal) of the enantiomers of the chiral drug tazofelone (TZF) by seeding its racemic liquid with enantiomer…
Hexagonal boron nitride ($h$-$\mathrm{BN}$) monolayer adsorption on the $\mathrm{Ni}\phantom{\rule{0.3em}{0ex}}(111)$ surface has been studied within the framework of both the local density (LDA) and generalized gradient approximations (GGA) of density functional theory. Experimental results for the nature of the adso…
Surface topography and work function maps were simultaneously obtained for Pt-evaporated titanium dioxide (TiO(2)) surfaces by using a Kelvin probe force microscope (KPFM). Platinum clusters with diameters of 2-3 nm and heights of 0.2-0.4 nm were obtained on rutile TiO(2)(110)-(1 x 1) surfaces. The work function on th…
Eight samples with nominal stoichiometry Ba 8 Cu 6 - x Ge 40+ x, x = 0−0.7, have been synthesized with a new method involving Ba 6 Ge 25 as an intermediate step. The new route provides fine control of the Cu:Ge ratio and allows systematic studies of the changes in the transport properties as a function of x . Resistiv…
Deposition of silver nanoparticles directly onto a Rhodamine Red monolayer covalently bound to glass is found to increase the photoluminescence by as much as 20 times depending on excitation wavelength and nanoparticle density. At the same time, the excited state lifetime is reduced by more than a factor of 2, the flu…
Studies on MnAs, and in particular of its magnetostructural phase transition, have a long history. As a promising material for ferromagnet/semiconductor hybrid structures with new challenges for solid state physics and electronic engineering, MnAs thin films recently came again into the focus of interest. This review…
Lichtgetriebene metallorganische Katalyse: Intramolekularer Photoelektronentransfer im Heterodimetallkomplex 1 ermöglicht die photokatalytische Produktion von Wasserstoff und die selektive Hydrierung von Tolan zu cis-Stilben (siehe Schema). Das {(4,4-di-tert-butyl-2,2-bipyridin)2Ru}-Fragment wirkt dabei als photoaktiv…
We report on the nanoscale structure and solvent-induced phase behavior of two, nearly similar π-conjugated hairy-rod polymers, branched side chain poly[9,9-bis(2-ethylhexyl)fluorene-2,7-diyl] (PF2/6) and linear side chain poly[9,9-dioctylfluorene-2,7-diyl] (PFO or PF8), in good and bad (or poor) solvents deuterated t…
We have used primarily temperature-programmed desorption (TPD) and infrared reflection-absorption spectroscopy (IRAS) to investigate CO adsorption on a Au(211) stepped single-crystal surface. The Au(211) surface can be described as a step-terrace structure consisting of three-atom-wide terraces of (111) orientation an…
Abstract Analytical measurements at the single molecule level under ambient conditions have become almost routine in the past few years. The application of this technology to fundamental studies of heterogeneity in biomolecular structure and dynamics, chemical and biological reaction kinetics and photophysics provides…
Materials that permit control over the release of DNA from the surfaces of topologically complex implantable devices, such as intravascular stents, could contribute to the development of new approaches to the localized delivery of DNA. We report the fabrication of ultrathin, multilayered polyelectrolyte films that per…
Free-standing Ag2V4O11 nanorings and microloops have been synthesized by a simple hydrothermal process without any template or surfactant. The Ag2V4O11 nanorings and microloops have preferred growth direction along the [30] plane and are formed by the self-rolling of Ag2V4O11 nanobelts.
We have investigated properties of chemically modified boron nitride nanotubes (BNNTs) with NH(3) and four other amino functional groups (NH(2)CH(3), NH(2)CH(2)OCH(3), NH(2)CH(2)COOH, and NH(2)COOH) on the basis of density functional theory calculations. Unlike the case of carbon nanotubes, we found that NH(3) can be…