Materials Literature
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Parametrization models of optical constants, namely Tauc–Lorentz (TL), Forouhi–Bloomer (FB) and modified FB models, were applied to the interband absorption of amorphous carbon films. The optical constants were determined by means of transmittance and reflectance measurements in the visible range. The studied films we…
This paper investigates the interaction between Si nanoclusters (Si-nc) and Er in $\mathrm{Si}{\mathrm{O}}_{2}$, reports on the optical characterization and modeling of this system, and attempts to clarify its effectiveness as a gain material for optical waveguide amplifiers at $1.54\phantom{\rule{0.3em}{0ex}}\ensurem…
Transparent inorganic UV-protective coatings are prepared by an epoxide-derived sol-gel route at low temperature. The obtained coatings show high transparency in visible range and highly efficient absorption in the whole UV range, which makes them ideal candidates for the protection against UV radiation.
Various XnY(3-n)Al-hydrotalcite-like compounds (HTlcs) were synthesized by the constant pH coprecipitation method with the (X2+ + Y2+)/Al3+ molar ratio fixed at 3.0. Well-mixed oxides Xn,Y(3-n)AlO were derived from corresponding HTlcs precursors upon calcination. Physicochemical characterization with X-ray diffraction…
BACKGROUND: Gadolinium (Gd)-based magnetic resonance contrast agents (GBMCA), including gadodiamide, have been identified as the probable causative agents of the serious disease, nephrogenic systemic fibrosis (NSF). OBJECTIVES: To investigate retained Gd-containing deposits in skin biopsies from patients with NSF and…
Corroding metals made of magnesium alloys represent a new class of degradable implants for musculoskeletal surgery. These implants may be associated with skin sensitizing reactions because of the release of metal ions. This study was conducted to compare the sensitizing potential of four different magnesium alloys (AZ…
A new nonlinear optical crystal BaTeMo 2 O 9 was grown from the TeO 2 −MoO 3 flux system with sufficient size (30 × 23 × 18 mm 3 ) and optical quality that allowed the characterization of its properties. It crystallizes in the noncentrosymmetrical system, space group P 2 1 (no. 4), with a = 5.5346 Å, b = 7.4562 Å, c =…
Conventional glasses based on oxides have a transparency limited by phonon absorption in the near IR region and have a limited interest for analyzing information located far beyond the visible. The IR spectral domain is nevertheless of prime interest, since it covers fundamental wavelength ranges used for thermal imag…
We give a complete characterization of the possible response matrices at a fixed frequency of n-terminal electrical networks of inductors, capacitors, resistors and grounds, and of n-terminal discrete linear elastodynamic networks of springs and point masses, both in the three-dimensional case and in the two-dimension…
Measurements of the temperature of Mo shocked to ~60 GPa and then released to ~28 GPa were previously attempted using high explosive driven flyer plates and pyrometry. Analysis of the radiance traces at different wavelengths indicates that the temporal evolution of the radiance can be explained by a contribution from…
Heat capacity of polycrystalline R2Ti3Ge4 (R = Gd, Tb and Er) compounds (Orthorhombic, Sm5Ge4-type, Space group Pnma) has been studied in the temperature range of 1.8 K to 300 K in various applied magnetic fields. The compounds with magnetic lanthanide elements show interesting low field magnetism intrigued by possibl…
Extended x-ray absorption fine-structure (EXAFS) measurements have been carried out on Ni$_{50}$Mn$_{35}$Sn$_{15}$ in the austenitic and martensitic phase. The temperatures associated with structural and magnetic phase transformations are obtained from magnetization measurements. The system orders ferromagnetically be…
The measured low initial sticking probability of oxygen molecules at the Al(111) surface that had puzzled the field for many years was recently explained in a non-adiabatic picture invoking spin-selection rules [J. Behler et al., Phys. Rev. Lett. 94, 036104 (2005)]. These selection rules tend to conserve the initial s…
We propose a scheme for calculation of linear optical response of current-carrying molecular junctions for the case when electronic tunneling through the junction is much faster than characteristic time of external laser field. We discuss relationships between nonequilibrium Green function (NEGF) and time-dependent de…
Momentum-transfer (q) dependent non-resonant inelastic x-ray scattering measurements were made at the N4,5 edges for several rare earth compounds. With increasing q, giant dipole resonances diminish, to be replaced by strong multiplet lines at lower energy transfer. These multiplets result from two different orders of…
Well-aligned ZnO nanowires (NWs) with tunable n-type conductivity are synthesized by introducing Ga2O3 as a dopant source in thermal evaporation. The crystallographic orientation of the NWs depends on the dopant content. Electrical transport property measurements on single nanowires verify that the resistivity of ZnO…
A comparative study of the magnetic and electron paramagnetic resonance (EPR) parameters of bulk and Co3O4 nanoparticles (NP), synthesized by a sol–gel process, is presented. Both samples possess the cubic phase with a slightly lower (by 0.34%) lattice parameter for the Co3O4 NP. The average crystallite size D = 17 nm…
Uniformly doped crystalline organic nanorods and nanowires are prepared by adsorbent-assisted physical vapor deposition. The emission color of the binary 1D nanomaterials can be controlled – and made to approach white light (see figure) – by changing the doping content, which is ascribed to intermolecular fluorescence…
We present a theoretical analysis of magnetic toroidal moments in periodic systems, in the limit in which the toroidal moments are caused by a time and space reversal symmetry breaking arrangement of localized magnetic dipole moments. We summarize the basic definitions for finite systems and address the question of ho…
The generation of “nanograss” surfaces, where the surface chemistry of nanorough silicon is precisely adjusted by the photochemical immobilization of polymeric thin films, is reported. The wetting properties of the surfaces can range from superwetting to impaled drops and superhydrophobicity. Superhydrophobic nanogras…