Materials Literature
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This paper presents the production process and the results of investigations into the microstructure and magnetic properties of epoxy-bonded iron–gallium (Galfenol) particulate composites. The manufactured composites consist of powdered Fe 80 Ga 20 alloy particles of three different size distributions (ranging from 20…
Lotus leaves are well known to be superhydrophobic and self-cleaning due to the hierarchical roughness of the leaf surfaces. The surfaces with controllable wettability may bring great advantages in a wide variety of applications and have received tremendous attention in recent years. In this review, the fundamental th…
P-type micron size silicon wire (SiW) arrays coated with ZnSe nanoparticles (NPs) exhibiting enhanced photodetection and photocatalytic performances were synthesized. The SiWs were grown by combining catalytic etching with nanosphere lithography methods. ZnSe NPs were coated on SiWs with a chemical bath deposition (CB…
The aim of this study was to establish an in vitro model test system for the analysis of cellular effects of nanoparticles on endothelial cells using the human brain microvascular endothelial cell line HBMEC, a representative of the blood-brain barrier. At first we defined a toxic end point by using superparamagnetic…
Thin films and epitaxial hetero-structures of doped and undoped CeO 2 , and 8 mol% Y 2 O 3 stabilized ZrO 2 (YSZ), were fabricated by pulsed laser deposition on different single crystal substrates. Reflection high energy electron diffraction was used to monitor in situ the growth mechanism of the films. Two distinct g…
Abstract When the well know thermoelectric PbTe is doped with a few percent Tl, the figure of merit, ZT = S 2 σ / κ , is dramatically improved (here S is the Seebeck coefficient, σ the electrical conductivity and κ the thermal conductivity). Tl is a valence skipper with valences of +1 and +3 and replaces Pb(+2) in PbT…
In this study, Cross-Polarization Magic-angle Spinning CP/MAS, 2D Exchange, Centerband-Only Detection of Exchange (CODEX), and Separated-Local-Field (SLF) NMR experiments were used to study the molecular dynamics of poly(ethylene glycol) (PEG) inside Hectorite/PEG intercalation compounds in both single- and double-lay…
Abstract Utilizing a hyperbranched cored ring‐opening polymerization of caprolactone, carbazole peripheral groups are extended to afford electropolymerizable star‐like copolymers. Different arm lengths are obtained on the basis of different degrees of polymerization from the polyethyleneimine core. This is confirmed b…
Abstract A new class of polyesters was prepared by polycondensation of a bile acid, deoxycholic acid, and an oligo(ethylene glycol) ( OEG ) with molar mass ranging from 100 to 1500. The chemical structure and composition of the polyesters were confirmed by 1 H‐NMR , Fourier transform infrared spectroscopy and HPLC ana…
We report a series of investigations of the pH-sensitive magnetic resonance (MR) responses of various surface-functionalized SPIONs (superparamagnetic iron oxide nanoparticles). First, functionalization of ∼12 nm highly monocrystalline SPION cores with three different generations of melamine dendrons was optimized to…
Particulate main-group elements (As 0, Sb 0, Bi 0, Pb 0, Se 0, Te 0 ) and compounds (Bi 4 Te 3, Sb x Bi 1– x with 0 ≤ x ≤ 1) are obtained via photoinitiated reduction under UV irradiation. The synthesis of Bi 0 and Se 0 is exemplarily studied in detail. Here, meso- to micrometer-scaled particles are obtained with mean…
An analysis of phenomena leading to high transmission at a one-dimensional metal grating is presented. It is shown that high resonant transmission can be obtained either for thick or thin gratings for a wide range of filling factors and that the origins of the enhanced transmission are different in each case. We analy…
We report on the synthesis and temperature-dependent magnetic properties observed in an exchange-coupled copper(II) dimer using X/Q-band Electron Paramagnetic Resonance (EPR) spectroscopy (9/34 GHz). It has been found that the zero-field splitting (D) in the dimer changes gradually by a factor close to two in the temp…
When nanoparticles interact with cells, the possible cellular responses to the particles depend on an array of parameters, in both particle and biological aspects. On the one hand, the physicochemical properties of the particles (e.g., material, size, shape, and surface charge) are known to play a key role in particle…
High-quality mass spectrometry data of the oscillatory behavior of CO oxidation on SiO(2) supported Pt-nanoparticles at atmospheric pressure have been acquired as a function of pressure, coverage, gas composition and nanoparticle size. The oscillations are self-sustained for several days at constant temperature, press…
Micron-sized Hall sensors made of epitaxial graphene grown on 4H-SiC(0001) have been fabricated and studied at room temperature using transport and noise spectrum measurements. We report detection of 1-μm Dynal bead with the magnetic moment of ~4×108μB, using a 2-μm epitaxial graphene device. A phase-sensitive AC-DC H…
We developed a model template method mimicking the nanocasting process by introducing cylindrical templates during the quenched molecular dynamics process [Y. Shi, J. Chem. Phys., 2008, 128, 234707] to generate hierarchical nanostructured porous carbons (HNPCs). Bimodal pore size distributions with both mesopores (fro…
The role of anesthesia on magnetic nanoparticle biodistribution among different organs after intravenous injection has been studied in a murine model. Animals were anesthetized by inhalation with isoflurane (0.5% in oxygen) or by intraperitoneal injection with a mixture of ketamine and xylazine. Then, monodisperse dim…
High magnetoelectric (ME) coefficients at room temperature have been found when 2-2 type laminates (one magnetostrictive, the other piezoelectric) made of iron-based Metglas alloys and PVDF piezoelectric polymer are used. Searching for a good ME response of such laminate composites when used at high temperatures, we h…
Remote plasma in situ atomic layer doping technique was applied to prepare an n-type nitrogen-doped ZnO (n-ZnO:N) layer upon p-type magnesium-doped GaN (p-GaN:Mg) to fabricate the n-ZnO:N/p-GaN:Mg heterojuntion light-emitting diodes. The room-temperature electroluminescence exhibits a dominant ultraviolet peak at λ ≈…