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 LaAlO3/SrTiO3 interface provides a unique platform for controlling the electronic properties of the superconducting semiconductor SrTiO3. Prior investigations have shown that two-dimensional superconductivity can be produced at the LaAlO3/SrTiO3 interface and tuned electrostatically. The recently demonstrated reve…
Abstract We now describe the finding that a copolymer of 9,9-dioctylfluorenyl-2,7-diyl and bipyridine (BPy) can extract in “one-pot” ≈96–97%-enriched (6,5)-SWNTs in m-xylene and p-xylene not containing metallic SWNTs, which was revealed by vis–near IR absorption, photoluminescence, and Raman spectroscopies.
In this work we describe a method for fabricating optical filters using multilayered porous silicon 1D photonic structure. An electrochemical cell is constructed to control the porosity of variable layers in p-type Si wafers. Porous silicon multilayered structures are formed of λ/4 (or multiples) thin films tha…
The conductive atomic force microscopy provided a local characterization of the dielectric heterogeneities in CaCu3Ti4O12 (CCTO) thin films deposited by MOCVD on IrO2 bottom electrode. In particular, both techniques have been employed to clarify the role of the inter- and sub-granular features in terms of conductive a…
This study develops an efficient mode solver based on pseudospectral eigenvalue algorithm to analyze liquid crystal waveguides with full 3 × 3 anisotropic permittivity tensors. Present formulation yields a cubic eigenvalue matrix equation with an eigenvalue of the propagation constant, and they are solved using an ite…
Abstract Zur Steuerung von Batch‐Kristallisationen ist die Kenntnis der zeitabhängigen Größenverhältnisse in gerührten Systemen von entscheidender Bedeutung. Mit dem Grundgedanken der Echtzeitanalyse von Kristallisationskinetiken wird in diesem Beitrag am Beispiel eines inerten, partikulären Modellstoffsystems die mög…
Abstract Er‐doped ZnO nano‐ and microstructures have been grown by thermal treating of compacted mixtures of ZnO and Er 2 O 3 powders and their optical properties have been studied by cathodoluminescence (CL). Annealing the pressed samples leads to the growth of nanoneedles and nanoneedle networks, as well as rods. CL…
This paper presents the calculated and experimental interference colors of liquid crystal (LC) films due to the optical retardation of two orthogonal electromagnetic components at different surface anchoring conditions and applied voltages. We simulate the deformation of LC director using finite element method and con…
Abstract We report Ge nanocrystals (NCs) based dual functional light emitting and metal insulator semiconductor (MIS) flash memory devices, fabricated by rf sputtering. Transmission electron micrographs revealed the formation of spherically shaped Ge NCs. We have observed broad electroluminescence (EL) around 760 nm,…
It is often assumed that single-walled carbon nanotubes grown via catalytic chemical vapor deposition are free of defects, particularly when suspended over a trench. Here we show that semiconducting nanotubes grown in this manner can contain a surprisingly large number of states within the band gap. High-resolution ph…
A lubrication model is used to study the dynamics of nanoscale droplets on wettability gradient surfaces. The effects of the gradient size, size of the nanodroplets and the slip on the dynamics have been studied. Our results indicate that the position of the center of mass of the droplets can be well described in term…
This study proposes in situ optical microspectroscopy as a means for the investigation of particle growth and metal transport in nanocomposite systems based on the temperature- and time-dependent optical response of the material. The technique has been successfully employed for the real-time monitoring of the growth o…
We performed a systematic investigation of the physical properties of CeFeAs${}_{1\ensuremath{-}x}$P${}_{x}$O${}_{0.95}$F${}_{0.05}$ (0 $\ensuremath{\leqslant}x\ensuremath{\leqslant}$ 1) by measuring electrical resistivity, magnetization, and specific heat. Superconductivity (SC) was observed in a wide range of P dopi…
In the present work, we show that a porous alumina template can easily be filled with magnetic nanoparticles and then be sealed by a hot water treatment (by forming an aluminium oxyhydroxide (AlOOH) sealant layer). The porous layer then can be separated from the substrate by an etch to form free magnetic AlOOH nano-ca…
Inelastic neutron scattering was used to study a quantum $\mathcal{S}=1/2$ antiferromagnetic Heisenberg system--- Bis(2-amino-5-fluoropyridinium) Tetrachlorocuprate(II). The magnetic excitation spectrum is shown to be dominated by long-lived excitations with an energy gap of $\ensuremath{\Delta}=1.07$(3) meV. The meas…
Hydrothermal synthesis (and other soft chemistry based thermal conversion routes) has emerged as one of the thriving methods for high quality one-dimensional (1D) nanostructures. However, it is still a great challenge to repair the pores and preserve the 1D morphology during the thermal conversion. The effects of the…
Filling the pores: A two-layer anodized alumina template consists of two sorts of parallel pores—through-pores and capped-pores. By selectively filling only the through-pores by various techniques, and then wet-chemically etching the walls between the capped-pores, a generic synthetic approach to alumina-sheathed nano…
We investigate field enhancements in two-dimensional 800 nm periodic arrays of (108–121 nm deep) V-grooves (opening angles 38°–75°) fabricated using focused ion beam milling in a 190 nm thick gold film on top of a fused silica substrate. Simulated and experimental reflectio…
The EtMe(3)P and EtMe(3)Sb triangular organic salts are distinguished from other Pd[(dmit)(2)] based salts, as they display valence bond and no long-range order, respectively. Under pressure, a superconducting phase is revealed in EtMe(3)P near the boundary of valence bond order. We use slave-rotor theory with an enla…
A series of thermo-responsive shape memory polymers were developed from commercially available polyalkenamer by balancing competitive crystallinity and elasticity via a monofunctional peroxide based crosslinking process. The main thermomechanical and shape memory properties of covalently crosslinked samples were chara…