Materials Literature
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Abstract Monte Carlo simulations were carried out to investigate the adsorption of semiflexible chains from a semidilute solution to substrates with periodic stripes of width w . The chains are made of fused N = 10 monomers of diameter σ interacting with each other through excluded volume interactions and with the str…
The time-dependent generalized unrestricted Hartree-Fock (TDGUHF) method combined with a two-component quasi-relativistic Hamiltonian generated from the Douglas-Kroll-Hess (DKH) transformation was developed to calculate frequency-dependent molecular magnetizabilities, which are the linear response quantity of a molecu…
The fact that the elastic constant for bending a layer of smectic- C liquid crystal along its c director differs from the value for bending in the perpendicular direction has recently been shown to give rise to interactions between distant layers. The effect of this entropy-induced interaction is to favor a parallel o…
Zwischen den Zeilen: Funktionalisierte einwandige Kohlenstoffnanoröhren (SWNTs) können in der hexagonalen kolumnaren Mesophase diskotischer Flüssigkristalle (DLCs) eingelagert werden. Die thermophysikalischen Eigenschaften von SWNT-DLC-Kompositen sprechen für einen Einschluss der SWNTs in die supramolekulare DLC-Struk…
Abstract The series of supramolecular complexes (Hg 6 As 4 )(CdCl 6 )Hg 0.5 ( 1 ), (Hg 6 As 4 )(HgCl 6 )Hg 0.5 ( 2 ), (Hg 6 As 4 )(CdBr 6 ) ( 3 ), and (Hg 6 Sb 4 )(CdI 6 )Hg 0.6 ( 4 ) has been prepared by a solid‐state reaction and their crystal structures determined by single‐crystal X‐ray diffraction. All these comp…
Die vorhergesagten endohedralen ikosaedrischen Cluster Pu@Pb12 (siehe Bild; Pu blau, Pb gelb) und [Am@Pb12]+ haben ein äußeres 32-Elektronensystem, das formal besetzten 7s-, 7p-, 6d- und 5f-Actinoidorbitalen entspricht, von denen jedes mit einem 6p-basierten Pb-Orbital des [Pb12]2−-Käfigs wechselwirkt. Diese Untersuch…
The polymorphism of a new organosiloxane tetrapode compound with cyano terminal polar groups was characterized by means of polarizing optical microscopy and x-ray diffraction. The compound exhibits smectic- A and smectic- C phases with a partial bilayer arrangement due to a certain degree of head-to-head association o…
Ein einfacher Lösungsprozess unter Umgebungsbedingungen an Luft ohne Hilfe durch ein Tensid, einen Katalysator oder ein Templat ergab Einkristallmikroröhren mit rechteckigen Querschnitten aus [2-(p-Dimethylaminophenyl)ethenyl]phenylmethylenpropandinitril (DAPMP). Die DAPMP-Mikroröhren (siehe REM-Aufnahmen) zeigen ausg…
The orientation of a ${\mathrm{C}}_{70}$ fullerene molecule encapsulated in a single-walled carbon nanotube (SWCNT) depends on the tube radius. First we confirm that chirality effects do not affect the orientation as well by comparing discrete atomistic calculations with the results of a continuous tube approximation…
We report on the measurement of the Raman intensity of radial breathing modes of a relatively large diameter range of single-walled carbon nanotubes (SWNTs) by confocal Raman scattering. Statistical data analysis yielded an intensity distribution within the excitation width of the single laser line at $2.33\phantom{\r…
The metamagnetic-like transitions and giant magnetocaloric effect were observed with the magnetic field applied parallel to the $a$ and $c$ axes, but not the $b$ axis in a ${\mathrm{Tb}}_{5}{\mathrm{Si}}_{2.2}{\mathrm{Ge}}_{1.8}$ single crystal. The in situ x-ray powder diffraction study indicates that these metamagne…
Bottom-up- und Top-down-Nanofertigung: Ein fluoreszierendes organisches Molekül mit einem Selbstorganisationsmodulator ordnet sich in situ durch dampfgetriebene Selbstorganisation in photochemisch abgegrenzten Bereichen einer Polymermatrix (siehe Bild; PAG: Photosäurebildner) zu stark fluoreszierenden Nanokügelchen mi…
To investigate multishell models of multiwalled carbon nanotubes, we consider the buckling of a pair of graphene layers interacting by van der Waals forces. The layers are modeled as continuum sheets whose interaction is determined by a Lennard-Jones interatomic potential. Important in our treatment is the effect of n…
Abstract Thermal degradation behavior of a biodegradable polymer (PBS) has been investigated by conventional and MTGA methods. The kinetic parameters of degradation were calculated by a general analytical solution and by the Coats‐Redfern, Ozawa, Horowitz‐Metzger, and MTGA methods. The results reveal that the reaction…
Human fibrinogen (Fg) and albumin (HSA) were labeled with (3)H and (14)C, respectively. Dual counting allowed the adsorbed amount of the two proteins to be determined simultaneously. Single adsorption, adsorption of the two proteins in competition, but also exchange (substitution by molecules of the same nature) and d…
The opposite orientation of the ester spacers in the rodlike ligands L 4C12 (benzimidazole-OOC-phenyl) and L 5C12 (benzimidazole-COO-phenyl) drastically changes the electronic structure of the aromatic systems, without affecting their meridional tricoordination to trivalent lanthanides, Ln(III), and their thermotropic…
Abstract Antimicrobial films of 25 and 70¯m thickness, incorporated with 7 and 3% sorbic acid, respectively, were layered with pastry dough without additive and evaluated for sorbic acid migration and antimicrobial efficiency. Pastry dough containing potassium sorbate layered with low‐density polyethylene films (LDPE)…
Abstract In this Review, we discuss the rich anisotropic properties of the ferromagnetic semiconductor (Ga,Mn)As, and their implications in transport studies. We review the various sources and types of anisotropy seen in the material, discuss its magnetization reversal process, and demonstrate how basic transport prop…
Abstract In this article, electrospinning technique has been demonstrated for the synthesis of ultra‐low dielectric constant polyimide fiber membranes. Poly(amic acid) fiber membranes have been prepared as precursor. After the treatment of thermal imidization, ultra‐low dielectric constant polyimide fibers membranes c…
We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy on high-quality single crystals of graphite to elucidate the character of low-energy excitations. We found evidence for a well-defined quasiparticle (QP) peak in the close vicinity of the Fermi level comparable to the nodal QP in high-T(c…