Materials Literature
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We find that plasma immersion ion implantation of polymer surfaces enhances their autohesive bond strength when pressed together by more than a factor of five. Both polymerising (CH4/O2) and nonpolymerising (Ar) plasmas are effective. There is currently no satisfactory theory for predicting this remarkable phenomenon.…
We have developed an effective model to investigate the energetic stability of hydrogenated group-IV nanostructures, followed by validations from density-functional theory calculations. The Hamiltonian of ${X}_{m}{\text{H}}_{n}$ ($X=$ C, Si, Ge, and Sn) is expressed analytically by the atom numbers ($m$, $n$) and the…
Thermodynamic parameters for the complexation of Eu(3+) with pyromellitic acid (1,2,4,5-benzenetetracarboxylic acid, BTC) as a model system for polymerizable metal-complexing humic acids were determined using temperature-dependent time-resolved laser-induced fluorescence spectroscopy (TRLFS) and isothermal titration c…
Measurements of the resistive properties and the lattice parameters of a (LaVO3)[6 unit cells]/(SrVO3)[1 unit cell] superlattice between 10 K and room temperature are presented. A low temperature metallic phase compatible with a Fermi liquid behavior is evidenced. It disappears in the vicinity of a structural transiti…
We report on the interplane $c$-axis electronic response of ${\mathrm{FeTe}}_{0.55}{\mathrm{Se}}_{0.45}$ investigated by infrared spectroscopy. We find that the normal-state $c$-axis electronic response of ${\mathrm{FeTe}}_{0.55}{\mathrm{Se}}_{0.45}$ is incoherent and bears significant similarities to those of mildly…
The reactions of titanium oxide molecules with dinitrogen have been studied by matrix isolation infrared spectroscopy. The titanium monoxide molecule reacts with dinitrogen to form the TiO(N(2))(x) (x = 1-4) complexes spontaneously on annealing in solid neon. The TiO(η(1)-NN) complex is end-on bonded and was predicted…
We demonstrate by experiments and numerical simulations that the low-temperature current-voltage characteristics in diffusive bilayer graphene (BLG) exhibit a strong superlinearity at finite bias voltages. The superlinearity is weakly dependent on doping and on the length of the graphene sample. This effect can be und…
X-ray elemental mapping and X-ray spectrum imaging are powerful microanalytical tools. However, their scope is often limited spatially by the raster area of a scanning electron microscope or microprobe. Limited sampling size becomes a significant issue when large area (>10 cm²), heterogeneous materials such as concret…
Abstract Ternary polymer blends of 80/10/10 (wt/wt/wt) polyamide6 (PA6)/polypropylene (PP)/acrylonitrile‐butadiene‐styrene (ABS), PP/PA6/ABS, and ABS/PP/PA6 were prepared in the presence of multiwalled carbon nanotubes (MWCNTs) by melt‐mixing technique to investigate the influence of MWCNTs on the phase morphology, el…
We report an observation of anomalous anisotropic magnetoresistance (AMR) in bilayered La1.2Sr1.8Mn2O7 single crystals. A giant AMR is found to be 80% under a magnetic field of 1 T near the metal-insulator transition temperature, where AMR is defined as AMR=[ρ(H⊥c)−ρ(H∥c)]/ρ(H⊥c)×100%, and ρ(H⊥c) and ρ(H∥c) are the re…
The band structures of zigzag graphene nanoribbons under uniaxial strain are investigated within the mean-field Hubbard model. In addition to the intrinsic gap modification, the strain can induce two additional gaps in the conduction and valence bands when the compressive strain along the armchair direction or the ten…
Aligned polyaniline (PANI) belts doped with dodecatungstosilic acid (H 4 SiW 12 O 40, abbreviated as SiW 12 ) are synthesized by interfacial control method without surfactants or templates. The structure and morphology of the PANI are characterized by Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD)…
Abstract A new tetrakis 4‐(2,5‐di‐2‐thiophen‐2‐yl‐pyrrol‐1‐yl) substituted nickel phthalocyanine (NiPc‐SNS) was synthesized and characterized by elemental analysis, Fourier Transform Infrared (FT‐IR), and UV–vis spectroscopies. The electrochemical polymerization of this newly synthesized NiPc‐SNS was performed in dich…
First-principles calculation was used to study the structural and electronic features of the low-dimensional oxide structure, SrTiO${}_{3}$/Sr${}_{1\ensuremath{-}x}$La${}_{x}$TiO${}_{3}$ ($x$ $=$ 0.25) superlattices, constructed by submonolayer low-dimensional La doping into SrTiO${}_{3}$. We demonstrate a dimensional…
Poly(ε-caprolactone) (PCL) is biocompatible, non-immunogenic and non-toxic, and slowly degrades, allowing sufficient time for tissue regeneration. PCL has the potential for application in bone and cartilage repair as it may provide the essential structure required for bone regeneration, however, an ideal scaffold syst…
Band excitation piezoresponse force microscopy enables local investigation of the nonlinear piezoelectric behavior of ferroelectric thin films. However, the presence of additional nonlinearity associated with the dynamic resonant response of the tip-surface junction can complicate the study of a material’s nonlinearit…
Abstract This study presents a very simple method to fabricate organic–inorganic asymmetric colloid spheres. In this approach, when silica particles are used as the Pickering emulsifier to stabilize the monomer droplets (styrene) in water via acid–base interaction between silica particles and auxiliary monomer (1‐viny…
We have investigated by means of ab initio calculations the structural and electronic properties of hydrogenated graphene structures with distinct grain boundary defects. Our total energy results reveal that the adsorption of a single H is more stable at defect. Further total energy calculations indicate that the adso…
The effect of precursors, such as copper nitrate, acetate, and chloride, on the bifunctional Cu–ZnO/γ-Al 2 O 3 catalysts was investigated for the direct dimethyl ether (DME) synthesis from syngas. The catalysts were characterized by measuring the reducibility and the surface area of metallic copper, together with thei…
Thermoelectric properties of the layered cobalt oxide system Li${}_{x}$CoO${}_{2}$ were investigated in a wide range of Li compositions, 0.98 \ensuremath{\geqslant} $x$ \ensuremath{\geqslant} 0.35. Single-phase bulk samples of Li${}_{x}$CoO${}_{2}$ were successfully obtained through electrochemical deintercalation of…