Materials Literature
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The magnetism of the Fe/Cr/Sn/Cr multilayers was studied by first-principles functional theory. The calculations by LAPW and SKKR methods showed that two solutions exist in the $Fe_9/Cr_{14}/Sn/Cr_2$ system. One of them is originated from the antiferromagnetic order in the bulk Cr, and the other is connected with inco…
You only need eyes to appreciate the color change that occurs in a polymer matrix when the bistable rotaxane shown is switched between its ground-state (green) and metastable-state (red) co-conformers. Not only is an electrochromic device within reach, but a universal switching mechanism seems to be on the cards.
A new contrast agent for MRI based on recombinant HDL-like nanoparticles has been prepared. It shows a great potential as a contrast agent for atherosclerotic plaques in a relative short time (24 h post-injection) as it is selective for the plaques and is an endogenous molecule. It also can distinguish between differe…
The elastic constants of the ${\mathrm{Ti}}_{1\ensuremath{-}x}{X}_{x}$ ($X=\mathrm{V}$, Nb, Ta, Mo, and W) and ${\mathrm{Zr}}_{1\ensuremath{-}x}{X}_{x}$ ($X=\mathrm{Nb}$ and Mo) binary alloys were calculated for $x=0.0$, 0.25, 0.5, 0.75, and 1.0 by the ultrasoft pseudopotential method within the generalized gradient a…
Abstract The effect of selected borates [i.e., tri(hydroxypropyl) borate (BTHP), tri[(3‐chloro‐2‐hydroxy‐1‐propoxy)propyl] borate (BTClHPP), and tri[(3‐chloro‐2‐hydroxy‐1‐propoxy)‐1‐methylethyl] borate (BTClHPME)] on the heat and thermal properties of the rigid polyurethane–polyisocyanurate foams was investigated. Inc…
Abstract Polymer films developed for distance detection, containing dye‐coated silver particles for ultra‐sensitive analysis using surface‐enhanced resonance Raman scattering (SERRS), identified the need for effective SERRS labels that interact strongly with the metal surfaces. Many dyes that are currently used for SE…
Abstract A series of alternating aliphatic poly(amide‐ester)s, derived from dicarboxylic acid and aminoalcohols, were obtained by polycondensation in melt. All poly(amide‐ester)s were characterized by FTIR and 1 H/ 13 C‐NMR spectroscopies. The synthesized polymers showed an inherent viscosity ranging from 0.4 to 1.0 d…
nu-Dysprosium borate (nu-DyBO(3)) was synthesized under conditions of high temperature and pressure in a Walker-type multi-anvil apparatus at 3 GPa and 1323 K. The compound is isotypic with the already known nu-samarium and nu-europium orthoborates.
A new type of atomization interference, caused by traces of oxygen in gases supplied to the atomizer, has been identified in three different types of miniature flame hydride atomizer for atomic fluorescence spectrometry, namely argon–hydrogen diffusion flame (MDF), flame-in-gas shield (FIGS) and double flame (DF), whi…
Phasenänderungen erhellt: Die Absorption von Röntgenphotonen löst in dem gemischtvalenten Mn/Fe-Cyanid Rb0.7MnII1.15[FeIII(CN)6]⋅2 H2O über einen großen Temperaturbereich interne Charge-Transfer-Prozesse aus. Dabei treten kontinuierliche wie abrupte Phasenänderungen auf (siehe Schema; HS=high spin, LS=low spin). Da di…
Eine hellere Zukunft für Silole: Lumineszierende Silolchromophore mit den höchsten Quanteneffizienzen für vollständig substituierte monomere Silole entstehen durch Variation der sterischen Eigenschaften der Substituenten. Behandelt man die 1,1-Dimethylsilole bei Raumtemperatur mit Bu4NF (TBAF) in THF, werden sie schne…
Recently, the Istituto di Metrologia 'G Colonnetti' (IMGC) and the National Metrology Institute of Japan (NMIJ) reported joint measurements of the (220) lattice plane spacing of Si. These measurements were carried out at both the IMGC and the NMIJ to resolve a discrepancy between previous determinations. It has been f…
Single crystals of anhydrous dimercury(I) monofluorophosphate(V), Hg(2)PO(3)F (1), were obtained by cooling diluted aqueous Hg(2)(NO(3))(2) and (NH(4))(2)PO(3)F solutions from 85 degrees C to room temperature. Compound 1 crystallizes with eight formula units in the orthorhombic space group Ibam (No. 72) and lattice pa…
Abstract The structural changes of nitrile rubber in both the presence and the absence of polyfunctional monomers, such as trimethylolpropane triacrylate (TMPTA), tripropyleneglycol diacrylate (TPGDA), and trimethylolmethane tetraacrylate (TMMT), at different doses of electron beam irradiations, were investigated with…
Abstract With anionic waterborne polyurethane (WPU) as a plasticizer and ethylene glycol diglycidyl ether (EGDE) as a crosslinker, we successfully prepared crosslinked soy protein isolate (SPI) plastics. Anionic WPU was mixed with SPI and EGDE in an aqueous dispersion at room temperature. The mixed aqueous dispersion…
The anisotropy splitting in the ground state of the single-molecule magnet ${\mathrm{Mn}}_{4}{\mathrm{O}}_{3}\mathrm{Br}{(\mathrm{O}\mathrm{Ac})}_{3}{(\mathrm{dbm})}_{3}$ is studied by inelastic neutron scattering as a function of hydrostatic pressure. This allows a tuning of the anisotropy and thus the energy barrier…
Variable-temperature spectroscopic and crystallographic studies on the chromium(II) Tutton's salts, (MI)2Cr(X2O)6(SO4)2, where MI = ND4+, Rb+, or Cs+, and X = H or D, are reported. Inelastic neutron scattering (INS) and multifrequency EPR experiments facilitate a rigorous definition of the ground-state electronic stru…
We investigate a disordered single-walled carbon nanotube (SWCNT) in an effective-medium supercell approximation (EMSCA). The first type of disorder that we consider is the presence of vacancies. Our results show that the vacancies induce some bound states on their neighbor host sites, leading to the creation of a ban…
Inherent structures give insight into the structural changes that accompany the glass transition. Here, we present data on the energetics and configurations of inherent structures for various compositions in the NaCl−CsCl system, which are dominated by long-range ionic interactions. By choosing these compositions so a…
In general, matter is broadly divided info three groups, %lids, Liquids and Gases. When solid is heated it First melts into liquid and on further heating moves to gaseous state. Some materials exhibit interesting intermediate between solid and fiquid called liquid crystals. Liquid crystals (ICs) ore defined as •conden…