Materials Literature
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Pluronic hydrogel nanoparticles cross-linked with poly(ethylenimine) (PEI) were synthesized by a modified emulsification/solvent evaporation method. Pluronic F-127 preactivated at the terminal group with p-nitrophenyl chloroformate was dissolved in dichloromethane, and the organic solution was emulsified in deionized…
Biodegradable polymeric nanofibres produced by electrospinning have been used as scaffolds for tissue engineering. Before these nanofibrous scaffolds can be implanted into the human body, it is important to know if the individual nanofibres are strong enough to withstand the forces exerted by the cells as they grow an…
(1 − x )Na 0.5 Bi 0.5 TiO 3 − x K 0.5 Bi 0.5 TiO 3 (NKBT100 x ; x being the mole ratio) piezoelectric ceramics were prepared by a conventional solid reaction method. The microstructure and ferroelectric properties of NKBT100 x solid solution ceramics with compositions of Na 0.5 Bi 0.5 TiO 3 (NBT)-rich and K 0.5 Bi 0.5…
The ion-bombardment induced evolution of intermixing is studied by molecular dynamics simulations and by Auger electron spectroscopy depth profiling analysis (AESD) in Cu/Co multilayer. It has been shown that from AESD we can derive the low-energy mixing rate and which can be compared with the simulated values obtaine…
A semi-empirical equation of state is presented for the liquid rubidium metal. The Lennard-Jones (8.5-4) potential model, which originally has been derived for liquid cesium metal, is found to be suitable for modeling of liquid rubidium metal as well. By applying the experimental PVT data of compressed liquid metal in…
We report on the magnetocaloric properties of two molecule-based hexacyanochromate Prussian blue analogs, nominally ${\mathrm{CsNi}}^{II}[{\mathrm{Cr}}^{III}(\mathrm{CN}{)}_{6}]∙({\mathrm{H}}_{2}\mathrm{O})$ and ${\mathrm{Cr}}_{3}^{II}[{\mathrm{Cr}}^{III}(\mathrm{CN}{)}_{6}{]}_{2}∙12({\mathrm{H}}_{2}\mathrm{O})$. The…
Abstract Durch die Verknüpfung anorganischer und organischer Bausteine mithilfe der templatgesteuerten Synthese gelangt man zu einer neuen Materialklasse, den mesoporösen organisch‐anorganischen Hybridmaterialien, die sich durch große spezifische Oberflächen sowie Porengrößen zwischen 2 und 15 nm auszeichnet. Das Einb…
Finding materials suitable for soft tissue replacement is an important aspect for medical devices design and fabrication. There is a need to develop a material that will not only display similar mechanical properties as the tissue it is replacing, but also shows improved life span, biocompatibility, nonthrombogenic, a…
Abstract Significant advances have recently been made in the development of functional polymers that are able to undergo light‐induced shape changes. The main challenge in the development of such polymer systems is the conversion of photoinduced effects at the molecular level to macroscopic movement of working pieces.…
Single-walled carbon nanotube (SWNT)-polymer composites have been fabricated to evaluate the electromagnetic interference (EMI) shielding effectiveness (SE) of SWNTs. Our results indicate that SWNTs can be used as effective lightweight EMI shielding materials. Composites with greater than 20 dB shielding efficiency we…
Mesoporous organic-inorganic hybrid materials, a new class of materials characterized by large specific surface areas and pore sizes between 2 and 15 nm, have been obtained through the coupling of inorganic and organic components by template synthesis. The incorporation of functionalities can be achieved in three ways…
Introduction The aims of this chapter are to develop an appreciation of the adaptive requirements of phytoplankton for pelagic life and to demonstrate the consequences of its embedding in the movements of the suspending water mass. The exploration begins by dismissing the simplistic notion that the essential requireme…
We present a first-principles investigation of the lattice dynamics and thermodynamical properties of a complex hydride ${\mathrm{NaAlH}}_{4}$, a promising material for hydrogen storage. The calculations are performed within the density-functional-theory framework and using a linear response theory. Calculations of th…
Cooler than ice: The structural and thermodynamic properties of high-density amorphous ice (HDA) prepared from two different starting materials, cubic ice and hexagonal ice, are compared. The resulting HDA states, have similar densities, however as shown by X-ray structure factors (see figure) and differential scannin…
Microsecond relaxation dynamics in a cavitating surface layer of bulk water superheated by a TEA CO(2) laser was studied using contact broadband photoacoustic spectroscopy. Damped nanosecond and microsecond oscillatory pressure-tension cycles recorded by an acoustic transducer are related to oscillations of steam bubb…
We present a theoretical investigation of the magnitude and temperature variation of the recently measured [Phys. Rev. B 66, 045302 (2002)] thermal conductivity of undoped and doped $\mathrm{GaAs}$ nanobeams of cross sections $100\phantom{\rule{0.3em}{0ex}}\mathrm{nm}\ifmmode\times\else\texttimes\fi{}250\phantom{\rule…
We synthesized single-crystalline samples of monoclinic ${\mathrm{BaIrO}}_{3}$ using a molten flux method, and measured their magnetization, resistivity, Seebeck coefficient, and nonlinear voltage-current characteristics. The magnetization rapidly increases below the ferromagnetic transition temperature ${T}_{\mathrm{…
Abstract Polymerization of propylene was carried out by using MgCl 2 .EtOH.TiCl 4 .DIBP.TEA.cHMDMS catalyst system in n ‐heptane, where MgCl 2 , EtOH, TiCl 4 , DIBP (diisobutyl phthalate), TEA (triethyl aluminum), and cHMDMS (cyclohexyl methyl dimethoxy silane) were support, ethanol for alcoholation, catalyst, externa…
Alles unter Kontrolle: In Gegenwart des künstlichen doppelt-hydrophilen Blockcopolymers Polyethylenglycol-b-poly(L-glutaminsäure) kristallisieren aus einer Mischung von N,N-Dimethylformamid und Wasser hoch monodisperse Vaterit-Mikrokügelchen (siehe Bild). Änderungen des Lösungsmittelverhältnisses beeinflussen die Morp…
AIMS: Knowledge of the species composition of complex bacterial communities is still very limited. The main objectives of this study were to identify medium-chain-length polyhydroxyalkanoates (mcl-PHAs)-producing bacteria from activated sludge fed with methanol as well as to characterize their PHA operon. METHODS AND…