Materials Literature
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The fabrication and performances of cantilevered probes with reduced parasitic capacitance starting from a commercial Si3N4 cantilever chip is presented. Nanomachining and metal deposition induced by focused ion beam techniques were employed in order to modify the original insulating pyramidal tip and insert a conduct…
The pure Fano-effect in angle-integrated valence-band photo-emission of ferromagnets has been observed for the first time. A contribution of the intrinsic spin polarization to the spin polarization of the photo-electrons has been avoided by an appropriate choice of the experimental parameters. The theoretical descript…
We investigate the effect of anisotropy and weak dipolar interactions on the magnetization of an assembly of nanoparticles with distributed magnetic moments, i.e., assembly of magnetic nanoparticles in the one-spin approximation, with textured or random anisotropy. The magnetization of a free particle is obtained eith…
Effects of side reactions during the formation of high quality colloidal nanocrystals were studied using ZnO as a model system. In this case, an irreversible side reaction, formation of esters, was identified to accompany formation of ZnO nanocrystals through the chemical reaction between zinc stearate and an excess a…
Following our previous papers on the mechanism of ε-caprolactone (CL) and l, l -lactide (LA) polymerization initiated by tin(II) octoate [(tin(II) bis(2-ethylhexanoate), (Sn(Oct) 2 )] in the presence of the hydroxyl-group-containing compounds [H 2 O, alcohols or hydroxy-carboxylic acids (ROH)] the present work shows t…
A DPD model of PEO-based block copolymer vesicles in water is developed by introducing a new density based coarse graining and by using experimental data for interfacial tension. Simulated as a membrane patch, the DPD model is in excellent agreement with experimental data for both the area expansion modulus and the sc…
In this paper we reported, to the best of our knowledge, the first deposition of highly oriented thin films (with thickness of about 90 nm) of NdCoO3 and Nd0.8Sr0.2CoO3 cobaltites on single-crystalline STO and LAO substrates. Our investigation has shown that highly oriented single phase thin films of NCO and NSCO can…
We propose how to control the THz radiation generated by fast moving Josephson vortices in spatially modulated (either along the c-axis or the ab-plane) samples of Bi-2212 and related superconducting compounds. We show that the JVs moving in a subset of weaker junctions can generate out-of-ab-plane and outside-the-con…
Sol–gel switching is triggered by counteranion guest exchange. The secondary structures of reversible coordination polymers can interconvert from a folded helical conformation (gel) into an unfolded zigzag conformation (sol) and back again in aqueous media (see picture).
Traditionally, SWNTs have been prepared by electric arc-discharge, laser ablation, or chemical vapor deposition (CVD) methods, yielding tubes of various diameter and length distributions. However, without exception, as-prepared SWNTs are contaminated with a number of impurities, decreasing the overall yield of usable…
Upon decreasing temperature or increasing pressure, a noncrystallizing liquid will vitrify; that is, the structural relaxation time, taualpha, becomes so long that the system cannot attain an equilibrium configuration in the available time. Theories, including the well-known free volume and configurational entropy mod…
We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying the aspect ratio of the nanoparticle allows control over the electron-hole overlap (radiative rate), and external electri…
Summary form only given. The complete presentation was not made available for publication as part of the conference proceedings.
Abstract The reaction of arsenic, arsenic trichloride and AlCl 3 with sulfur or selenium, respectively, in closed glass ampoules at 80 °C leads to melts from which on slow cooling to 50 °C (As 3 S 5 )[AlCl 4 ] and (As 3 Se 4 )[AlCl 4 ] can be obtained in the form of yellow and red crystals. The crystal structures ((As…
Abstract An unprecedented one‐dimensional chainlike compound with green fluorescent emission, (H 3 O)[Ag 3 (2,2′‐bpy) 2 (phnz) 2 (β‐Mo 8 O 26 )] (bpy = bipyridine, phnz = phenazine) has been synthesized under hydrothermal conditions. The compound is constructed from β‐octamolybdate clusters linked through two kinds of…
A thorough investigation of the relaxational dynamics in the recently discovered multiferroic $\mathrm{Cd}{\mathrm{Cr}}_{2}{\mathrm{S}}_{4}$ showing a colossal magnetocapacitive effect has been performed. Broadband dielectric measurements without and with external magnetic fields up to $10\phantom{\rule{0.3em}{0ex}}\m…
Abstract A new iron(II) orthophosphate K[Fe(PO 4 )] has been obtained by hydrothermal synthesis and its crystal structure was determined by single‐crystal X‐ray diffraction: space group P 2 1 / n , Z = 8, a = 9.6199(10), b = 8.6756(8), c = 10.8996(13) Å, β = 115.577(8)° at 193 K, R = 0.023. Fe II shows coordination nu…
Compositional variations across ferroelectric bilayers result in broken spatial inversion symmetry that can lead to asymmetric thermodynamic potentials. For the case of insulating materials, ferroelectric multilayers will self-pole due to the electrostatic coupling between the layers. Polarization-graded ferroelectric…
Abstract About Lanthanide Oxotantalates with the Formula MTaO 4 (M = La – Nd, Sm – Lu) Besides being a by‐product of solid state syntheses in tantalum ampoules the lanthanide(III) oxotantalates of the formula MTaO 4 can be easily prepared by sintering lanthanide sesquioxide M 2 O 3 and tantalum(V) oxide Ta 2 O 5 with…
Deformational behavior in freely suspended polymer nanomembranes with embedded carbon nanotubes has been investigated by in-situ monitoring of resonance Raman scattering (see Figure). A two-stage deformational process, with bending and buckling of the nanotubes at low deflections followed by along-axis stretching at h…