Materials Literature
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We studied the emission of the O 2 molecules embedded in fumed silica (amorphous silicon dioxide) nanoparticles differing for diameters and specific surface. By using a 1064 nm laser as a source we recorded both the O 2 emission and the Raman signal of silica. Our experimental data show that the O 2 emission/Raman sig…
Von der Nano- zur Makroskala: Die Immobilisierung eines photo- und redoxaktiven 9,10-Di(1,3-dithiol-2-yliden)-9,10-dihydroanthracen-basierten Dipeptids (1) auf einwandigen Kohlenstoffnanoröhren (SWCNTs) liefert eine hohe Selbstausrichtung der 1/SWCNTs (siehe Bild). Die Anordnung der 1/SWCNTs ist der Schlüssel zur Stab…
Three methods to fabricate continuous FePt films with graded magnetic anisotropy for bit patterned media (BPM) were evaluated. Continuous FePt films with surface roughness of less than 0.3 nm were achieved in continuous FePt hard magnetic films, FePt/Fe exchange coupled composite (ECC) films and FePt/Fe based graded f…
The dramatic slowdown of the structural relaxation at the glass transition is one of the most puzzling features of glass dynamics. Single molecule orientational correlation times show this strong Vogel-Fulcher-Tammann temperature dependence typical for glasses. Through statistical analysis of single molecule trajector…
FePt bit patterned media (BPM) was fabricated with a self-assembled polymer mask with a feature size of 12 nm pitch (equivalent to 5 Tdots/in2). A 3.5 nm FePt film with high c-axis crystal orientation was prepared for the magnetic recording layer. A solvent vapor annealing process was applied for obtaining uniform dir…
Micropatterns of the nanostructured aluminum oxide (NAO) with sizes from 5 to 200 μm have been successfully fabricated on the indium tin oxide (ITO) glass substrate by simply combining a lift-off process and a one-step anodization process for the first time. The detection of fluorescent dyes and biomolecules tagged wi…
Materials with broken inversion symmetry are of great interest for their exotic electronic properties but are relatively rare. We show here that even if a material is inversion-symmetric in the bulk form, in epitaxial thin films of the same compound the crystallographic unit cell can be quite asymmetric. To demonstrat…
Abstract One of the widely accepted uses of ordered mesoporous materials is as supports of enzymes for biotechnological applications. Enzymes have been trapped, anchored, or encapsulated in organized porous networks of the mesoporous range (2–50 nm). The reactivity of the surface of mesoporous materials has enabled th…
A detailed structural disorder investigation of Prussian blue analogues M 1.5 [Cr(CN) 6 ]· z H 2 O (M = Fe and Co) has been done by carrying out a reverse Monte Carlo (RMC) simulation on the powder neutron diffraction data. X-ray diffraction, infrared spectroscopy, Mössbauer spectroscopy, and dc magnetization measurem…
A study about the size-dependence of the hyperpolarizability-enhancement observed in metal-functionalized finite graphene species is presented. The reported ab initio and density functional results suggest that edge-passivation of graphene fragments with metallic agents (in this case Li) triggers an impressive enhance…
Abstract Interest regarding the WGS process has grown significantly, because of the recent progression in fuel cells as a clean technology for power generation. Due to the large volume and cost of WGS conventional two‐stage reactors, and also problems related to pyrophoricity and lengthy reduction of customary catalys…
Abstract Since electric cables play important roles such as power supply and information transmission, their degradation may cause serious problems. We have been trying to monitor the degradation of cable insulation by measuring the magnitude and phase angle of the impedance as a function of frequency in a very wide f…
Recent advances in nanostructured materials have spurred the development of improved thermoelectric (TE) devices. Performances of these systems are strongly linked to their thermal conductivities. Accurate measurement techniques of thermal parameters are therefore required to assess the efficiency of new thermoelectri…
A series of L-cysteine-derived double hydrocarbon chain amphiphilic gelators L-(3-alkyl-carbamoylsulfanyl)-2-(3-alkylurido)propionic acid with different hydrocarbon chain lengths (C6-C16) was designed and synthesized. These gelators efficiently gelate only aromatic solvents. The gelation ability increased with the inc…
The use of ionic self-assembly, a facile non-covalent approach, to access non-conventional block copolymer morphologies, including tetragonal and helical structures, from a combination of polyferrocenylsilane diblock copolymer polyelectrolytes and AOT-based surfactants, is described.
Aluminum nitride (AlN) nanoparticles were firstly treated with a silane coupling agent, γ‐aminopropyl‐triethoxysilane (γ‐APS), to introduce amine groups (AlN‐APS), then grafting of the hyperbranched aromatic polyamide started from the modified surface (AlN‐HBP). The surface modified AlN nanoparticles were characterize…
In this research, the effect of heat treatment on the machinability of α/ β (Ti54M) and β (Ti10-2-3) titanium alloys was investigated experimentally for the as-received, annealed and solution-treated plus aged conditions. Forces and temperature, that is, life of the cutting tool, are mainly influenced by variation in…
Analytical and equivalent circuit models are presented to elucidate the balance of powers in scattering processes. Specifically, closed-form expressions of the associated maximal extracted, scattered, absorbed and reactive powers are formulated. The circuit model then helps to characterize in a straightforward manner…
Phase structures and transitions of a series of side-chain liquid crystalline polyacetylene (SCLCPA) with a short spacer of three methylene units and different lengths of alkyl tails, namely, poly(5-{[(4′-alkyl-4-biphenylyl)carbonyl]oxy}-1-pentyne) (P-3, m, m is the number of the carbon atoms in the alkyl tail, m = 5,…
By systematically investigating the light emission and scattering properties of arrays of Au nanoparticles with varying size and separation, we demonstrate tunability and control of metal photoluminescence and unveil the critical role of near-field plasmonic coupling for the engineering of active metal nanostructures.…