Materials Literature
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The radiative and nonradiative decay rates of lissamine dye molecules, chemically attached to differently sized gold nanoparticles, are investigated by means of time-resolved fluorescence experiments. A pronounced fluorescence quenching is observed already for the smallest nanoparticles of 1 nm radius. The quenching i…
Small-angle x-ray scattering (SAXS) measurements have been performed to investigate particle morphology during in situ hydrogen evolution from a 1000-\AA{} epitaxial Nb film on $(112\ifmmode\bar\else\textasciimacron\fi{}0)$ sapphire initially loaded to saturation with hydrogen. The SAXS intensity follows the plate or…
Abstract From a rheological study of emeraldine base (EB)/ N ‐methyl‐2‐pyrrolidinone (NMP)/2‐methyl‐aziridine (2MA) solutions, a correlation between the solution concentration and solution viscosity was found. We investigated the rheokinetic mechanism of the EB dissolution process and determined the reaction rate, act…
The γ-brass type phase Pt2Zn11—δ (0.2 < δ < 0.3) was prepared by reaction of the elements in evacuated silica ampoules. The structures of crystals grown in the presence of excess zinc or alternatively excess platinum were determined from single crystal X-ray diffraction intensities and confirmed by Rietveld profile fi…
For the enhancement of the compatibility of fluoropolymers with other materials radiation modification is applied, for which irradiation with high-energy electrons provides an efficient and flexible possibility. Poly(tetrafluoroethylene) (PTFE) is known to predominantly undergo chain scission under irradiation. To cou…
Magnetic domain structures of $\mathrm{N}{\mathrm{d}}_{\mathrm{1}\mathrm{/}\mathrm{2}}\mathrm{S}{\mathrm{r}}_{\mathrm{1}\mathrm{/}\mathrm{2}}\mathrm{M}\mathrm{n}{\mathrm{O}}_{\mathrm{3}}$ were investigated by means of low-temperature Lorentz electron microscopy. On cooling, magnetic domain walls started to appear at 2…
We have evidenced by small-angle neutron scattering at low temperature the coexistence of ferromagnetism (F) and antiferromagnetism (AF) in ${\mathrm{P}\mathrm{r}}_{0.67}\mathrm{C}{\mathrm{a}}_{\mathrm{0.33}}\mathrm{M}\mathrm{n}{\mathrm{O}}_{\mathrm{3}}$. The results are compared to those obtained in ${\mathrm{P}\math…
An ordered surface structure formed after exposure of the ${\mathrm{HfB}}_{2}(0001)$ surface at $800\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ to ${\mathrm{SiH}}_{4}(g)$ followed by annealing at $900\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ has been characterized experimentally with low-energy electron diffra…
NH4[Hg3(NH)2](NO3)3 (1) und [Hg2N](NO3) (2) werden aus ammoniakalischen Lösungen von Hg(NO3)2 bei Raumtemperatur bzw. hydrothermal bei 180 °C in Form von farblosen bzw. dunkelgelben bis hellbraunen Einkristallen erhalten. Die Kristallstrukturen {NH4[Hg3(NH)2](NO3)3: kubisch, P4132, a = 1030, 4(2) pm, Z = 4, Rall = 0,…
Nanometer-scale thin films of rhodium supported on glassy carbon (nm-Rh/GC) were prepared by electrochemical deposition using cyclic voltammetry. STM studies demonstrated that the Rh film is made of layered crystallites of an average size 230 nm (l) × 90 nm (w) × 10−30 nm (h). In situ FTIR spectroscopic investigations…
The binary collision approximation (BCA) grounded on molecular dynamics results is used to investigate the influence of the range and stiffness of interatomic potentials on the replacement collision sequence (RCS) length and frequency distributions as well as on the displacement cascade expansion and density. Differen…
Hydrogen bonding between early and late transition metal complexes is proposed as a strategy to obtain ferromagnetic interactions based on a theoretical study using density functional calculations.
The interactions of charged particles with cylindrical tubules are studied within the framework of the dielectric theory. Elementary excitations on a tubule are modeled by an infinitesimally thin layer of free-electron gas, uniformly distributed over the surface of the tubule. The dielectric function of such a system,…
Understanding the blue shift in the photoluminescence (PL) of the nanosolid near the lower end of the size limit ( D < 5 nm) seems difficult with the currently available models. This challenges are not simply numerical convergency but importantly new physics hiding behind. We examined hereby the PL blue shift of Si na…
This paper presents a review of the electronic, magnetic and spectroscopic properties of manganese (Mn)-based nanostructures. In the last few years a variety of techniques have been used to prepare mesoscopic transition-metal islands and novel effects associated with the electronic structure in nanoscale systems have…
The encapsulation of metal atoms within Si-based cage clusters leads to stable metal-encapsulated Si cage clusters (Si-cc). The present work investigates the effect of encapsulation of transition metal atoms (TMAs). We show that the filling factor of the d-band of the TMA is the dominant factor determining the structu…
The walls of vanadium oxide nanotubes (VOx-NTs) are built up by vanadate layers between which the structure-directing template, either a primary amine or a diamine with long alkyl chain, is located. The feasibility of various exchange reactions under preservation of the tubular morphology indicates a high structural f…
Oxygen deficient indium−tin-oxide (ITO) nanofibers have been synthesized by using a simple thermal evaporation−oxidation method through a VLS crystal growth mechanism from Sn-rich In−O−Sn ternary alloys droplets.
Thin films of the extracellular matrix protein, collagen, were prepared by adsorbing native or heat-denatured type I collagen onto hexadecanethiol self-assembled monolayers. The resulting films were characterized by atomic force microscopy, ellipsometry, and light microscopy. Denatured collagen formed a topographicall…
A layered manganese oxide nanocomposite (PDDAMO) with poly(diallyldimethylammonium chloride), PDDA, incorporated between manganese oxide sheets, was synthesized by a delamination/reassembling process. The product was characterized by powder X-ray diffraction, elemental analysis, thermal analysis, FT-IR spectroscopy, a…