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。
Experimental data on the fragmentation of copper shaped-charge jets are presented and the techniques used for data processing are described. A combined numerical/analytical analysis is designed to describe shaped-charge jet breakup. The method overcomes drawbacks from exclusively numerical or analytical analyses, such…
In this study, Antheraea pernyi silk fibroin (Ap-SF) films were incubated with Protease Type XXI from Streptomyces griseus, at 37 degrees C, to investigate the degradation behavior in an in vitro model system. The enzyme-resistant fractions of Ap-SF films and the soluble peptides formed by proteolytic degradation were…
The dc and ac conductivity of polycrystalline SeSm 0.005 bulk samples have been measured under vacuum in the temperature range 363–93 K. The samples displayed dielectric dispersion in the frequency range 50 Hz–80 kHz. The calculated values of the exponent s of the function σ = A ω s showed that correlated barrier hopp…
The Gemant-DiMarzio-Bishop model, which connects the frequency-dependent shear modulus to the frequency-dependent dielectric constant, is reviewed and a new consistent macroscopic formulation is derived. It is moreover shown that this version of the model can be tested without fitting parameters. The reformulated vers…
A ${\mathrm{Mn}}_{4}$ single-molecule magnet (SMM), with a well-isolated spin ground state of $S=9∕2$, is used as a model system to study Landau-Zener (LZ) tunneling in the presence of weak intermolecular dipolar and exchange interactions. The anisotropy constants $D$ and $B$ are measured with minor hysteresis loops.…
The electrochemical polymerization of 3,4-ethylenedioxythiophene (EDOT) in a water solution of hydroxypropyl cellulose (HPC) as a polymer lyotropic liquid crystal (LC) gives poly EDOT*/HPC hybrid (PEDOT*/HPC) as an optically active polymer. Circular differential interference contrast (C-DIC) microscopy of the polymer…
PURPOSE: The incorporation of doxorubicin in long-circulating sterically stabilized liposomes (SSL-DXR) alters the pharmacokinetics and biodistribution of doxorubicin and therefore has the potential to alter the pharmacologic properties of doxorubicin. Previously, we showed that repetitive administration of SSL-DXR al…
We present a quantitative, systematic study of the effect of magnetostriction on the dynamical properties in NiFe alloys. Both the ferromagnetic resonance frequency and the damping times are correlated to the magnetostriction. In addition, we find that the Gilbert damping parameter varies by more than 100% over the ra…
High sensitivity and fast calorimeters based on silicon nitride thin-film technology are used to study thermal properties of sub-micron samples and transition kinetics on a millisecond time scale. A commercially available thin-film sensor was utilized in our previous works for fast-scanning calorimetric measurements.…
Electrostatic glue: Chiral anionic molecular squares are generated by linking four spiro-biscatecholate ligands with boron centers. Through ionic interactions and hydrogen bonding, substituted ammonium ions facilitate the stacking of the anionic squares into infinite nanotubes (see picture; green B, black C, blue N, r…
In this study we report the effect of sintering temperature on the low field magnetotransport properties of La 0.7 Ca 0.3 MnO 3 manganite synthesized through polymeric precursor route.The La 0.7 Ca 0.3 MnO 3 has been sintered at 600 o C (S6), 700 o C (S7), 800 o C (S8), 900 o C (S9) and 1000 o C (S10).XRD confirms tha…
To clarify the effect of surface passivation on the optical properties of nanocrystalline porous silicon (PS), the photoluminescence (PL) characteristics of PS have been investigated by employing a high-pressure water vapor annealing (HWA). PS samples with various porosities were prepared on (100)-oriented p-type (4Ωc…
The effect of electrolyte (NaHCO3) concentration on the adsorption of poly-DADMAC (poly-diallyldimethylammonium chloride) onto cellulosic fibers with different charge profiles was investigated. Surface carboxymethylated fibers were obtained by grafting carboxymethyl cellulose (CMC) onto the fiber surface and bulk carb…
Magnetic properties of lithium ferrite nanoparticles of size in the range of 4–50nm, synthesized by a low-temperature method, have been evaluated. A broad maximum at ∼220K in the temperature variation of the zero-field-cooled magnetization as well as the ac susceptibility and divergence of the zero-field-cooled and fi…
We present shear mechanical and dielectric measurements taken on seven liquids: triphenylethylene, tetramethyltetra-phenyltrisiloxane (Dow Corning 704 diffusion pump fluid), polyphenyl ether (Santovac 5 vacuum pump fluid), perhydrosqualene, polybutadiene, decahydroisoquinoline (DHIQ), and tripropylene glycol. The shea…
To cap it all off: Colloidally stable hydrophilic 1D CdTe nanostructures (see picture) have been easily prepared under aqueous conditions in the presence of capping thiol ligands. The present methodology shows a strong dependence on the concentration of the precursors and the molecular structure of the ligand.
The structural, electrical and optical properties of RF sputtered In 2 O 3 : Sn (ITO) thin films and the effect of post-deposition annealing have been studied. The thickness ranges from 225 to 862 nm. X-ray diffraction, scanning electron microscopy (SEM) and atomic force microscopy (AFM) experiments were performed to…
Suspendiert: Schwach hydrophobe Siliciumoxid-Partikel stabilisieren Emulsionen, indem sie dicht gepackte Monoschichten an der Grenzfläche der Tröpfchen bilden, die als sterische Barriere gegen Koaleszenz wirken. Dagegen stabilisieren stark repulsive Partikel Emulsionen durch spontane Organisation in dichten Monoschich…
In order to gain some insight on the electronic relaxation mechanisms occuring in diamond under high intensity laser excitation and/or VUV excitation, we studied experimentally the pulsed conductivity induced by femtosecond VUV pulses, as well as the energy spectra of the photoelectrons released by the same irradiatio…
We reconsider the long-standing problem of the effect of spin fluctuations on the critical temperature and isotope effect in a phonon-mediated superconductor. Although the general physics of the interplay between phonons and paramagnons has been rather well understood, the existing approximate formulas fail to describ…