Materials Literature
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Functionalizing nanotubes: An easy method is developed to functionalize boron nitride nanotubes. Hydrogen peroxide is used to oxidize the surface of pristine BN nanotubes to get hydroxylated BN nanotubes, which are chemically active for further functionalization. The Figure shows hydroxylated BN nanotubes can be well…
The effect of surface functionalisation of bacterial cellulose nanofibrils (BC) and their use as reinforcement for polylactide (PLLA) nanocomposites was investigated. BC was functionalised with various organic acids via an esterification reaction. This rendered the otherwise hydrophilic BC hydrophobic and resulted in…
Electromagnetic cloaks are devices that make objects undetectable for probing with electromagnetic waves. The known realizations of transformational-optics cloaks require materials with exotic electromagnetic properties and offer only limited performance in narrow frequency bands. Here, we demonstrate a wideband and l…
One potential cancer treatment selectively deposits heat to the tumor through activation of magnetic nanoparticles inside the tumor. This can damage or kill the cancer cells without harming the surrounding healthy tissue. The properties assumed to be most important for this heat generation (saturation magnetization, a…
High-performance antireflective and antifogging surfaces are fabricated on planar silica substrates and planconvex lenses. Such surfaces dramatically suppress reflection over a large range of wavelengths and a large field of view. Additionally, the ARS surfaces exhibit high-quality superhydrophilic properties. For ant…
An optical microscope-focused laser beam technique was employed to effectively microstructure uniform patterns on graphene oxide nanosheets in a fast and controlled manner.
Abstract Optical absorption of tris thiourea zinc sulphate (ZTS) single crystals has been measured and its direct band gap was found to be 3.6 eV. Theoretical calculations were carried out to determine the linear optical constants such as extinction coefficient and refractive index. Further the optical nonlinearties o…
Silks play a crucial role in the survival and reproduction of many insects. Labial glands, Malpighian tubules, and a variety of dermal glands have evolved to produce these silks. The glands synthesize silk proteins, which become semicrystalline when formed into fibers. Although each silk contains one dominant crystall…
A single-layer graphene–CdS quantum dot nanocomposite is synthesized by a one-step reaction from graphene oxide, and thus avoids the low-yield production and the aggregation of single-layer graphene sheets. This new graphene-based material shows promising optoelectronic properties. Picosecond ultrafast electron transf…
PbO–As2O3 glasses mixed with different concentrations of TiO2 (ranging from 0 to 1.0 mol%) were crystallized. The samples were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy (EDS) techniques. Studies were extended to optical absorption, IR, ESR, luminescence and mag…
We present a generalized Peierls–Nabarro model for curved dislocations incorporating directly the Peierls energies for both straight dislocations and dislocation kinks. In our model, the anisotropic elastic energy is calculated efficiently using the discrete Fourier transform on the discrete lattice sites of the slip…
Abstract Ultraschalldurchflussreaktoren können als Alternative zu Rührkesseln bei der Fällung angesehen werden. Um die Abläufe in Ultraschalldurchflussreaktoren besser verstehen zu können, wurde die Mikromischung im Reaktor näher untersucht. Hierzu wurde die Iodid‐Iodat‐Reaktion nach Villermaux verwendet. Als verfahre…
High-temperature Raman spectroscopy has been applied to investigate the melt structure near the BiB3O6 (BIBO) crystal–melt interface. Based on the experimental results, the crystal growth mechanism was proposed. (BOØ)n (Ø = bridging oxygen atom) chains and free Bi3+ cations present in the BIBO bulk melt act as the cry…
Tungstate phosphor synthesized by a polyol method exhibits characteristic emission of Tm 3+ in the blue region when excited either by ultraviolet light or by a low-voltage electron beam. The emission at 453 nm predominates in both spectra, which is attributed to the exceptionally large probability of transition 1 D 2…
A wide-range doping was achieved by a high-pressure method for ${\text{TbFeAsO}}_{1\ensuremath{-}\ensuremath{\delta}}$ from ``underdoped'' to ``overdoped'' superconducting compositions throughout the optimized superconductivity (${T}_{\text{c}}$ of 44 K). ${T}_{\text{c}}$ vs $\ensuremath{\delta}$ shows a dome-shaped f…
Mechanical stimulation has been shown to dramatically improve mechanical and functional properties of gel-derived tissue engineered blood vessels (TEBVs). Adjusting factors such as cell source, type of extracellular matrix, cross-linking, magnitude, frequency, and time course of mechanical stimuli (among many other fa…
Developing steps in designing a system for predicting garment appearance quality are presented. The articles of clothing investigated are ladies' jackets and the accent is given to subjective evaluation of individual factors of garment appearance quality. A group of semi-skilled evaluators and a group of experts in th…
Band alignment
In this paper, the regulating role of CoOx on deleterious Cl − over PdO/SiO 2 for CO oxidation has been thoroughly studied. By comparing the catalyst prepared from Pd(NO 3 ) 2 and PdCl 2, the deleterious effect of Cl − has been confirmed. The addition of CoOx leads to the significant temperature-dependent variation of…
Abstract A review is presented here of our previous contributions concerning the production of ultrapure hydrogen through the dry reforming of methane conducted in a membrane reactor. The reaction equilibration ratio is the criterion to compare the catalytic performance of the La‐based catalysts used in these studies.…