Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The derivative-based analysis for detecting regions of the validity of the Vogel-Fulcher-Tammann (VFT) dependence for superpressed and supercooled liquids is discussed. For the temperature $(T)$ path the analysis introduced by Stickel et al. [J. Chem. Phys. 104, 2043 (1996); J. Chem. Phys. 107, 1086 (1997)] is recalle…
The aggregation in conjugated polyelectrolytes (CPs) can be effectively reduced by the formation of CP/nanoparticle assemblies. The photophysical properties of various nanoassemblies were studied by means of UV-visible and fluorescence spectroscopy in solution and as thin films. The dissociation of the polymer chains…
The isotropic-nematic spinodals of solutions of rigid spherocylindrical colloids with various shape anisotropies L/D in a wide range from 10 to 60 are investigated by means of Brownian dynamics simulations. To make these simulations feasible, we developed a new event-driven algorithm that takes the excluded volume int…
Electrospun ZnO nanofibers were obtained by calcinating PVA/Zinc Acetate composite fibers at various temperatures. Atomic Force Microscopy (AFM) revealed that the ZnO fibers have diameters in the range of 100-200 nm. The fibers were characterized by FT- IR, TGA-DTA, and XRD studies. The XRD results showed that the cry…
The effect of sonication during chitin extraction from freshwater prawn shells on yield, purity, and crystallinity of chitin was investigated. Dry prawn shells were suspended for 4 h in 0.25 M HCl at 40 degrees C while they were sonicated for 0, 1, and 4 h. Demineralized shells were lyophilized, resuspended in 0.25 M…
Sprossenwand: Bei der konzertierten Selbstorganisation eines α,ω-Bis(triphenylentetrahydroxy)disiloxans durch π-Stapelwechselwirkungen und Wasserstoffbrücken entsteht ein supramolekularer Kanal, in dem die Silanolgruppen zwischen zwei hydrophoben Säulen eingekeilt sind. Die gerichtete Polykondensation führt zu einem l…
Abstract The further use of di‐2‐pyridyl ketone [(2‐py) 2 CO] innickel( II ) acetate chemistry has been investigated. Various synthetic procedures have led to the synthesis ofcomplexes [Ni 4 (O 2 CMe) 2 {(2‐py) 2 C(OH)O} 4 (H 2 O) 2 ](ClO 4 ) 2 ( 1 ), [Ni(O 2 CMe){(2‐py) 2 C(OH) 2 }{(2‐py) 2 CO}](ClO 4 ) · H 2 O ( 2·…
Paclitaxel is one of the best antineoplastic drugs found in nature in the past decades, which has excellent therapeutic effects against a wide spectrum of cancers. Because of its high hydrophobicity, Cremophor EL has to be used as adjuvant in its clinical dosage form (Taxol), which has been found to cause serious side…
The susceptibility spectra of ten molecular glass formers are completely interpolated by an extension of the generalized gamma distribution of correlation times. The data cover at least 15 decades in frequency and the interpolation includes both alpha peak and excess wing. It is shown that the line shape parameters an…
On the rung way: Concerted self-organization of an α,ω-bis(triphenylenetetrahydroxy)disiloxane through π–π-stacking and H-bonding interactions generates a supramolecular channel in which silanol groups are entrapped between two hydrophobic columns. Ordered polycondensation leads to a high-molecular-weight, soluble, la…
Electrosynthesis of zinc oxide has been performed in track etched polymer membranes to yield nanorods of defined diameter and controlled length. The electrodeposition process involves two steps: (i) electroreduction of either hydrogen peroxide or nitrate ions to alter the local pH within the pores and (ii) precipitati…
We investigated the optical properties of isolated single aggregates of Ag nanoparticles (Ag nanoaggregates) on which rhodamine 6G molecules were adsorbed to reveal experimentally a correlation among plasmon resonance Rayleigh scattering, surface-enhanced resonance Raman scattering (SERRS), and its background light em…
Electron-electron correlations affect the band gap of half-metallic ferromagnets by introducing nonquasiparticle states just above the Fermi level. In contrast with the spin-orbit coupling, a large asymmetric nonquasiparticle spectral weight is present in the minority-spin channel, leading to a peculiar finite-tempera…
Abstract Highly crystalline polyaniline (PANI) nanotubes and nanofibers ca. 80–170 nm in diameter are successfully prepared by a “micelle soft‐template” method in the presence of dicarboxylic acids dopants with different numbers ( n ) of –CH 2 – groups ( n = 0–4). It is found that the diameter of the nanostructures in…
Tetracyanoethylene (TCNE) undergoes numerous reactions and is reported to exist in many structural motifs. Identification of these forms and motifs can be challenging. Nonetheless, the number of nu(CN) absorptions and their frequencies provide insight with respect to the specific forms and charge on the TCNE fragment.…
The dynamics of crystal surfaces in the presence of electromigration is analyzed. From a phase field model with a migration force which depends on the local geometry, a step model with additional contributions is derived in the kinetic boundary conditions. These contributions trigger various surface instabilities, suc…
An experiment which describes the quantum states of neutrons in magnetic thin films and superlattices is reviewed.
Electronic states localized at domain walls between ferromagnetically ordered phases in two-dimensional electron systems are generated by moderate spin-orbit coupling. The spin carried by these states depends on the slope of the magnetic background at the domain wall. The number of localized states is determined by a…
We investigated the conducting properties of functionalized single wall nanotubes (SWNTs) with a finite addend concentration. Robust differences are found between monovalent and divalent additions. For the former a small number of addends can significantly disrupt the ballistic conductance of nanotubes near the Fermi…
We report a temperature-dependent Raman scattering investigation of the multiferroic material bismuth ferrite ${\mathrm{BiFeO}}_{3}$ (BFO). The observed loss of the Raman spectrum at the ferroelectric Curie temperature ${T}_{C}$ should be in agreement with a cubic $Pm\overline{3}m$ structure of the high-temperature pa…