Materials Literature
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The local electronic structure of the SrO-terminated SrTiO${}_{3}$(001) surface was explored using scanning tunneling microscopy. At low bias voltages in the empty states, a unidirectional structure with a periodicity of three unit cells, superimposed on a $c(2\ifmmode\times\else\texttimes\fi{}2)$ reconstructed struct…
A novel magnesium phosphate cement made from magnesia and potassium phosphate was studied. The objective of the study was to examine the basic characteristics and cementing mechanism of the cement. The effect of magnesia content on setting time, temperature rise during initial reaction and strength development of the…
Hydrogels are three-dimensional networks of crosslinked hydrophilic polymers widely used for protein delivery and tissue engineering. To be eligible for in vivo applications, the hydrogels should not evoke an adverse tissue response. In this study the angiogenic and inflammatory responses in vivo after implantation of…
The isolated pyridine-Ag(+)-pyridine unit (Py-Ag(+)-Py) is employed as a model system to characterize the recently observed Ag(+)-mediated base pairing in DNA oligonucleotides at the molecular level. The structure and infrared (IR) spectrum of the Ag(+)-Py(2) cationic complex are investigated in the gas phase by IR mu…
Wechselnde Spinzustände : Wenn für das Metallzentrum in einem Übergangsmetallkomplex mehrere Spinzustände möglich sind, kann das die Reaktivität des Komplexes beeinflussen. In solchen Fällen ist bei der Interpretation von experimentellen und theoretischen Befunden Vorsicht angebracht.
Multiwalled carbon nanotubes (MWCNTs) were synthesized by catalytic chemical vapor deposition method using Fe/Co catalyst over CaCO 3 support and acetylene gas as a carbon precursor in the temperature range of 650–800°C, and were modified with Preyssler anion nanostructures via impregnation method. The existence of na…
Abstract Zinc oxide (ZnO) thin films were deposited on sapphire (0001) substrates at room temperature by radiofrequency (RF) magnetron sputtering at oxygen gas contents of 0%, 25%, 50% and 75%, respectively. The influence of oxygen gas content on the structural and optical properties of ZnO thin films was studied by a…
Guided mode resonance (GMR) filters are highly functional micro-optics capable of narrowband spectral filtering. GMR devices have previously been demonstrated on flat substrates using a wide range of materials and configurations. In this Letter, we apply a soft lithographic technique followed by the deposition of diel…
The promise of biomimetic smart structures that can function as sensors and actuators in biomedicine is enormous. Technological development in the field of stimuli-responsive shape memory polymers have opened up a new avenue of applications for polymer-based synthetic actuators. Such synthetic actuators mimic various…
Abstract ETFE, PE, and PP surfaces were functionalized by a procedure involving the activation of the substrates with cold, atmospheric‐pressure helium plasma, formation of surface‐bound peroxides in air, and subsequent grafting of polymer brushes from these initiators by means of free‐radical polymerization. Strategi…
Ferromagnetic absorption spectra of ɛ-AlxFe2-xO3 powders with various x parameters and densities were obtained using free space quasi-optical spectrometer. Two absorption peaks located at around 95 and 105 GHz have been found. The 95 GHz absorption corresponds to x parameter value of 0.66; while the 105 GHz absorption…
Nicht zuletzt vor dem Hintergrund der potenziellen Risiken für eine nephrogene systemische Fibrose (NSF) nach Applikation von gadoliniumhaltigem Kontrastmittel hat die kontrastmittelfreie MR-Angiografie (Non-KM-MRA) in den letzten Jahren wieder zunehmend an Bedeutung gewonnen. Neben den bereits etablierten Time-Of-Fli…
3-Aminopropyl functionalized silica is synthesized directly using cationic fluorinated surfactants (C 6 F 13 C 2 H 2 NC 5 H 5 Cl (HFOPC) and C 8 F 17 C 2 H 2 NC 5 H 5 Cl (HFDePC)) and a hydrocarbon surfactant (C 16 H 33 N(CH 3 ) 3 Br (CTAB)) as templates. The resulting 3-aminopropyl functionalized silica has a two-dim…
We discuss a model for the evolution of a mushy zone which forms during the solidification of a binary alloy cooled from below in a tank with finite height. Our focus is on behaviours of the system that do not appear when either a semi-infinite domain or negligible solute diffusion is assumed. The problem is simplifie…
Abstract The α–β phase transformation behavior of Zr‐2.5Nb (in mass%) has been characterized in real time during an in situ neutron diffraction experiment. The Zr‐2.5Nb material in the current study consists, at room temperature, of α‐Zr phase ( hcp ) and two β phases ( bcc ), a Nb rich β‐Nb phase and retained, Zr ric…
This study presents the synthesis and physical characterization of a series of structurally well-defined star-shaped poly(lactic acids). Polymer stars are prepared from a series of multifunctional alcohol cores including flexible polyols pentaerythritol and dipentaerythritol (four-armed and six-armed cores, respective…
We performed a systematic magneto-optical Kerr spectroscopy study of Ga${}_{1\ensuremath{-}x}$Mn${}_{x}$As with varying Mn densities as a function of temperature, magnetic field, and photon energy. Unlike previous studies, the magnetization easy axis was perpendicular to the sample surface, allowing us to take remanen…
Abstract The microstructure and mechanical properties of Mg‐Zn‐Ho‐Zr alloys have been investigated in detail. The grain size of the as‐cast Mg‐Zn‐Ho‐Zr alloy was greatly decreased by the addition of Ho, and the grain growth during solution treatment was suppressed by Mg‐Zn‐Ho phases formed at grain boundaries. These t…
This work discusses the thermodynamic analysis of integrated gasification fuel cell plants, where a simple cycle gas turbine works in a hybrid cycle with a pressurized intermediate temperature–solid oxide fuel cell (SOFC), integrated with a coal gasification and syngas cleanup island and a bottoming steam cycle (refle…
Abstract Siliciumdioxidnanopartikel verfügen über besondere Eigenschaften, z. B. eine geringe Toxizität, und stellen eine vielseitige Plattform für die Nanotechnologie dar. Ein geeignetes Design oder eine geeignete Derivatisierung führen zu selbst unter physiologischen Bedingungen stabilen Kolloiden und ermöglichen ve…