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。
Abstract The properties and morphologies of UV‐cured epoxy acrylate (EB600) blend films containing hyperbranched polyurethane acrylate (HUA)/hyperbranched polyester (HPE) were investigated. A small amount of HUA added to EB600 improved both the tensile strength and elongation at break without damaging its storage modu…
The tensile deformation process of individual single-walled carbon nanotubes (SWCNTs) was in situ observed with measurements of the mechanical properties by transmission electron microscopy combined with the functions of scanning probe microscopy. The values of Young's modulus, tensile stress and strain at the fractur…
Abstract Amorphous stoichiometric thin films of TeO 2 have been successfully grown by reactive rf‐sputtering deposition. The proper choice of deposition parameters such as the rf power, the Ar/O 2 composition and pressure of the sputtering gas, the substrate temperature, enabled us to obtain TeO x films of different t…
Abstract In this work we report on the growth of CdS and ZnS semiconductor nanocrystals embedded in a polymeric matrix (polystyrene) by synthesizing a metal thiolate precursor and its subsequent thermolysis at about 300 °C after dispersion in the polymer. The crystallinity, shape and size of the metal sulfide nanocrys…
We report on the effects of the coupling of nematic order and elasticity in anisotropic lyotropic gels consisting of large nematic domains of surfactant coated single wall carbon nanotubes embedded in a cross-linked N-isopropyl acrylamide polymer matrix. We observe the following striking features: (i) undulations and…
A dependency of quantum efficiency of nn/sup +/pp/sup +/ silicon complementary metal-oxide-semiconductor integrated light-emitting devices on the current density through the active device areas is demonstrated. It was observed that an increase in current density from 1.6/spl times/10/sup +2/ to 2.2/spl times/10/sup +4…
We demonstrate an optical method for detecting specific binding events in an oligo deoxyribonucleic acid (DNA) chip using an anchoring transition of a nematic liquid crystal (NLC) as a result of DNA hybridization. A homeotropic orientation of the NLC supported by oligoDNA changes to a random planar orientation after h…
Mixture of single-crystalline MnO and Mn3O4 nanowires was synthesized by thermal evaporation of MnCl2 powders. The diameter is 50–100nm, the length is about 20μm, and the growth direction is uniformly [100] for both cubic MnO and tetragonal Mn3O4 nanowires. The temperature-dependent magnetization and magnetic hysteres…
We report a simple but powerful method for engineering multi-walled carbon nanotubes (MWNTs) by using manipulation by an atomic-force microscope. The successive shell-by-shell extraction process of ultralong MWNTs allows the exposure of the innermost single-walled carbon nanotubes (SWNTs), which have diameters as smal…
Wet-etching of amorphous Ge2Sb2Te5 films was studied by ICP and XPS spectrometries. It is thought that wet-etching arises from chemical etching that starts with bond breakages, oxidation of each element and subsequent dissolution of the resultant oxides. The Ge element debonds more easily from the Ge–Sb–Te matrix than…
Using an effective potential approach, we present a replica instanton theory for the dynamics of entropic droplets in glassy systems. Replica symmetry breaking in the droplet interface leads to a length scale dependent reduction of the droplet surface tension and changes the character of the dynamical heterogeneity an…
Abstract 0.1–0.3 mm thick entanglements of quasi‐one‐dimensional semiconducting Tin dioxide nanocrystals, in form of nanowires and nanobelts, are successfully grown by low cost Chemical Vapour Deposition directly on large area (100 mm 2 ) Al 2 O 3 , SiO 2 and Si substrates. Their lateral size ranges from 50 to 700 nm…
Cryopreservation is a pivotal process in cellular engineering for creating a continuous source of generated functional cell lines and for the convenience of various medical treatments that involve cell culture. FBS (fetal bovine serum) supplemented with 10% (v/v) DMSO is extensively used as a freezing medium for mamma…
Abstract One‐dimensional (1D) nanostructures of CdSe have been found to exhibit morphologies of nanowires, nanobelts, and nanosaws, but their synthesis is by trial and error. To meet the needs of large‐scale, controlled, and designed synthesis of nanostructures, it is imperative to systematically find experimental con…
Single-crystal synchrotron x-ray diffraction measurements in strong magnetic fields have been performed for magnetoelectric compounds $\mathrm{Gd}\mathrm{Mn}{\mathrm{O}}_{3}$ and $\mathrm{Tb}\mathrm{Mn}{\mathrm{O}}_{3}$. It has been found that the $\mathbit{P}\ensuremath{\Vert}a$ ferroelectric phase induced by the app…
Electron transport through Si-C bound alkyl chains, sandwiched between n-Si and Hg, is characterized by two distinct types of barriers, each dominating in a different voltage range. At low voltage, current depends strongly on temperature but not on molecular length, suggesting transport by thermionic emission over a b…
An experimental evidence of subwavelength imaging with a "lens", which is a uniaxial negative permittivity wire medium slab, is reported. The slab is formed by gratings of long thin parallel conducting cylinders. Taking into account the anisotropy and spatial dispersion in the wire medium we theoretically show that th…
Ca Cu 3 Ti 4 O 12 ceramics has been prepared by the conventional solid-state reaction method under different sintering conditions. Dielectric properties have been investigated in the temperature range of 25–350°C within the frequency range of 40Hz–10MHz. It has been found that both the dielectric constants and the gra…
The present study reports clear evidence and physical significance of an interband transition due to the transition from the d band to an empty state in the conduction band in the optical absorption spectra of Au nanoparticles. The optical absorption due to interband transitions has been observed to dominate the plasm…
Photoinduced charge separation is a fundamental step in photochemical energy conversion. In the design of molecularly based systems for light-to-chemical energy conversion, this step is studied through the construction of two- and three-component systems (dyads and triads) having suitable electron donor and acceptor m…