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。
Lines of ∼20nm half-pitch were generated on silicon surface using a self-assembled organosilicate nanostructure. A mixture of a poly(styrene-b-ethylene oxide) (PS-b-PEO) with an organosilicate precursor that is selectively miscible with PEO was used to create lamellar phase whose orientation was controlled perpendicul…
In this letter we propose a preparation method of the metal organic charge transfer complex Cu-tetracyanoquinodimethane (CuTCNQ) for use in nonvolatile organic memories. The method, consisting in current controlled oxidation of a Cu electrode in LiTCNQ saturated acetonitrile, is attractive because CuTCNQ growth is lim…
We report an alternative method combining dielectrophoresis and impedance spectroscopy to provide rapid, accurate measurement of dielectrophoretic collection of single-walled carbon nanotubes (SWNTs) in real time. We analyzed a Triton X-100 suspension of mixed SWNTs to measure their precise dielectrophoretic collectio…
We propose a new theoretical scheme for the binary phase diagrams of crystal-liquid crystal mixtures by a combination of a phase field model of solidification, the Flory-Huggins theory for liquid-liquid mixing and Maier-Saupe-McMillan (FH-MSM) model for nematic and smectic liquid crystal orderings. The phase field the…
Abstract Summary: Melt elasticity of a series of conventional and metallocene‐catalyzed PEs is investigated. The samples show very noticeable differences in their molecular architecture, including a variable degree of LCB and MWD. Four parameters ( De , RSI, recoverable shear and steady state compliance), determined t…
We observed that the SrMg2(PO4)2:Eu phosphor could emit long life phosphorescence with the excitation light whose wavelength was shorter than 420nm, however, when La, Ce, or Gd was codoped, the wavelength of the excitation light to cause the phosphorescence had a redshift of 40nm. A possible mechanism and related disc…
Optical and morphological properties of fluorocarbon films (CFx) deposited on Si substrates from CHF3 in a reactive ion etcher were studied by spectroscopic ellipsometry (SE). The study has led for 0.3–1.5μm thick films to a thickness-independent, roughnessless, apparently nongraded two-layer model that requires the C…
The lattice dynamical results of silicon nanostructures with all three different degrees of confinement (nanoslabs, nanowires, nanodots) are systematically analysed and presented using an adiabatic bond charge model. In the direction of propagation of these structures, it is found that the phonon branches change from…
We describe the first demonstration of PbTe-based, cross-plane quantum-dot superlattice (QDSL) unicouple thermoelectric generator devices fabricated from nanostructured, thick-film materials (∼100μm). Both n- and p-type QDSL materials were investigated. With ∼220K temperature difference across small thermoelements (∼9…
We have chemically modified metal nanoslit array surfaces with alkanethiol self-assembled monolayers and have characterized the resulting spectral shift of optical transmission. Adsorption of a self-assembled monolayer (1.5nm thick) on a silver nanoslit array (slit width of 30–50nm and grating period of 360nm) is foun…
Low temperature photoluminescence spectra of synthetic $\mathrm{PbS}$ crystals having the natural isotopic abundance (95% $^{32}S$) are compared with crystals grown using 99% $^{34}S$. An anomalous decrease in the band gap energy of $6.5\ifmmode\pm\else\textpm\fi{}2\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath…
The Hugoniot and critical shear strength of shock-compressed metals can be obtained directly from molecular dynamics simulations without recourse to surface velocity profiles and their analyses. Results from simulations in aluminum containing an initial distribution of microscopic defects are shown to agree with exper…
We study the effect of vacancies and charged impurities on the performance of carbon nanotube transistors by self-consistently solving the three-dimensional Poisson and Schrödinger equations. We find that a single vacancy or charged impurity can decrease the drive current by more than 25% from the ballistic current. T…
CdTe-coated magnetic polystyrene nanospheres (MPN) were prepared via a stepwise electrostatic self-assembly approach, and the conjugation of epidermal growth factor (EGF) to the MPN/CdTe core–shell nanocomposites was prepared by using 1-ethyl-3(3-dimethylamino propyl)-carbodiimide (EDC) as a cross-linking reagent. The…
Nanodiamond films were deposited using different microwave plasma chemical vapor deposition schemes following several nucleation pretreatment methods. The nucleation efficiency and the films structure were investigated using scanning and transmission electron microscopy and Raman spectroscopy. C2 dimer growth (CH4 and…
Individual single-wall carbon nanotubes (SWNTs) exhibited continuous-wave stimulated Raman scattering (SRS). The Raman gain is a few orders higher, and the threshold power is a few orders lower, than values ever reported for other bulk materials and is explained as the result of both the large nonlinear property and e…
The K-shell jump ratio, jump factor and the ratio of total to K-shell photoelectric cross section at K edge have been determined for Hf, Ta, Au and Pb by adopting a novel method. In this method, continuous external bremsstrahlung (EB) photons are produced in a thin nickel elemental converter by beta particles from a 9…
Poly (vinyl alcohol) (PVA) and L-lactic acid (LA) were compounded to get biodegradable polymeric film with useful mechanical, thermal, and bacteriostatic properties for possible medical or packaging applications. Samples with various concentrations of LA were prepared by using the solvent cast technique and characteri…
In this paper we discuss continuum models of phase separation in polymer solutions, with emphasis on the thermodynamic foundation of these models. We demand that these models obey a free energy dissipation relation, which in the present context plays the role of the second law of thermodynamics, since the system is is…
We correlate topography and diffraction measurements to demonstrate that grain orientation profoundly influences polishing rates in polycrystalline diamond synthesized by chemical vapor deposition. Grains oriented with {111} or {100} planes perpendicular to the surface normal polish at significantly lower rates compar…