Materials Literature
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Abstract Controllable synthesis of novel sandwiched polyaniline (PANI)/ZnO/PANI free‐standing nanocomposite films is reported via spin coating of ZnO quantum‐dot interlayer on PANI base layer and then PANI surface layer on the ZnO interlayer. The thickness of the ZnO interlayer and the PANI surface layer can be easily…
We report on the Seebeck coefficient of quantum confined electron gases in GdTiO3/SrTiO3 heterostructures. These structures contain two-dimensional electron gases with very high sheet-carrier concentrations on the SrTiO3-side of the interface due to intrinsic interface doping. While the sheet carrier concentrations ar…
We measured the negative normal stress differences in graphene (0.5 wt. %)/polycarbonate composites during shear flow. The Peclet number in graphene/PC melt is estimated to be 105 ∼ 108, indicating the graphene sheets are non-Brownian. The negative normal stress is related with the deformations of gel-like structure o…
Oxidative stress is a major factor contributing to endothelial cell damage. Single-wall carbon nanotubes (SWCNTs) have oxidative properties; however, the oxidative effects of SWCNTs on endothelial cells are not fully understood. In the present study, we investigated the effects of oxidative stress induced by SWCNTs on…
In this letter a concept of a simple dual-band (DB) composite right/left-handed (CRLH) metamaterial is presented and discussed. This DB-CRLH concept is based on the combination of a conventional CRLH unit-cell with two conventional right-handed transmission-line sections. The equations required for analysis of such st…
Zinc-doped copper oxide (CuO:Zn) nanowires (NWs) with Cu and Zn layers were grown by thermal oxidation on a glass template in ambient air. The Zn content in the CuO NWs was approximated 9.9%. Field emitters using these CuO:Zn NWs were also fabricated on the glass substrate and compared with those using NWs composed of…
Oriented single-crystals of trippkeite (CuAs 2 O 4 ) and an isostructural mineral schafarzikite (FeSb 2 O 4 ) were investigated by polarized Raman spectroscopy. The internal vibrations, i.e. the stretching and bending modes, of trippkeite occur between 250 and 850 cm -1 , and those of schafarzikite between 200 and 750…
The ability to monitor corrosion on a nanometer scale is a powerful tool for a fundamental understanding of surface chemical processes. Nanoscale chemical images of individual bare and alumina-coated zinc oxide nanowires (NWs) were recorded using tip-enhanced second harmonic generation (SHG) spectroscopy before and af…
The work is based on the experimental activities developed to investigate the behavior of fiber metal laminate (FML) materials used for very critical structural components, such as leading edge panels that must satisfy a series of requirements defined in terms of structural resistance, applying impact loads at differe…
Abstract Methods to make polymer composites comprise melt and solution blending, but in the particular case of polyolefins they are not appropriate due to the weak interfacial adhesion. In the present work, in situ blended (ISB) together with in situ polymerization (ISP) processes have been employed and compared using…
Charge fluctuations along the quasi-1D frameworks of M(x)V(2)O(5) bronzes have evinced much recent interest owing to the manifestation of colossal metal-insulator transitions and superconductivity. Depending upon the nature of the intercalating cation (M), distinctive geometries of the V(2)O(5) framework are accessibl…
Abstract Functionalized polymeric nanocarriers have been recognized as drug delivery platforms for delivering therapeutic concentrations of chemotherapies. Of this category, star‐shaped multiarm polymers are emerging candidates for targeted delivery of anticancer drugs, due to their compact structure, narrow size dist…
Hybridization state mapping with atomic resolution was demonstrated using electron energy loss spectroscopy combined with scanning transmission electron microscopy. The O 2p states hybridized with Sn 5s and Cu 3d in a layered double perovskite La2CuSnO6 were individually distinguished by significant contrast differenc…
Abstract Inspired by the stability at high temperature and the high mechanical strength of boron nitride nanotubes (BNNTs), the effect of temperature on the compressive buckling of BNNTs has been investigated in this paper. Molecular dynamics (MD) simulations of BNNTs subjected to high temperatures (up to 3000 K) were…
While the high sensitivity of plasmonic metal nanoparticles in Surface-Enhanced Raman Spectroscopy (SERS) is well established, applications of SERS in the selective identification of trace quantities of targeted molecules in a mixture of species remain to be a challenge. In this contribution, we demonstrate the design…
Abstract A two‐step method was used in this article to synthesize a novel biodegradable polyurethane (PU) composed by L ‐lysine ethyl ester diisocyanate (LDI) hard segment, poly(ε‐caprolactone) diols (PCL‐diol) soft segment and 1,4:3,6‐dianhydro‐ D ‐sorbitol (isosorbide) chain extender. FTIR, 1 H‐NMR results revealed…
Inorganic nanomaterials and particles with enhanced optical, mechanical, or magnetic attributes are currently being developed for a wide range of applications. Safety issues have developed however concerning their potential cyto- and genotoxicity. For in vivo and in vitro experimentations, recent developments have hei…
We theoretically demonstrate that the energy gaps of graphene quantum dots (GQDs) can be easily tuned by applying opposite electrostatic potentials to the two equally divided parts of them. This control of energy gaps by such an external electrostatic potential can be realized in various sizes or shapes of GQDs. We pr…
We characterize the terahertz detection mechanism in antenna-coupled metallic single-walled carbon nanotubes. At low temperature, 4.2 K, a peak in the low-frequency differential resistance is observed at zero bias current due to non-Ohmic contacts. This electrical contact nonlinearity gives rise to the measured terahe…
Bi-layer hybrid biocomposites were fabricated by hand lay-up technique by reinforcing oil palm empty fruit bunch (EFB) and jute fibre mats with epoxy matrix. Hybrid composites were prepared by varying the relative weight fraction of the two fibres. The physical (void content, density, dimensional stability), and chemi…