Materials Literature
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We measured noninvasively step velocities of elementary two-dimensional (2D) islands on {110} faces of tetragonal lysozyme crystals, under various supersaturations, by laser confocal microscopy combined with differential interference contrast microscopy. We studied the correlation between the effects of protein impuri…
Flower-like crystalline morphologies of palladium (Pd) nanoparticles (NPs) were synthesized in the aqueous phase at room temperature by using strongly hydrophobic surfactants as capping/stabilizing agents following the seed-growth method. Small Pd seeds were synthesized first and then used as nucleating centers for th…
The adsorption and dissociation of CO have been calculated on the (100) surfaces of the body-centered cubic transition metals Fe, Mo, Cr, and W and the alloys Fe 3 Mo and Fe 3 Cr using density functional theory for two CO coverages, 0.25 and 0.5 ML. A complete analysis of the vibrational frequencies was performed to c…
The surface plasmon dispersion of gold films with and without chemisorbed, alkane thiol self-assembled monolayers (SAMs) has been investigated using high resolution electron energy loss spectroscopy (HREELS). For a bare Au(111) film, the surface plasmon energy (2.49 eV at the zone center) shows a positive dispersion.…
Abstract Zinc oxide nanowires with two distinct morphologies were synthesized on silicon substrates using a simple thermal evaporation and vapor transport method in an oxidizing environment. The as‐synthesized nanowires were coated with gold to allow excitation of surface plasmons over a broad frequency range. SERS st…
The synthesis, X-ray diffraction, photoluminescence, TGA/DTA and FTIR techniques in Dy(3+) activated Na(2)Sr(PO(4))F phosphor are reported in this paper. The prepared phosphor gave blue, yellow and red emission in the visible region of the spectrum at 348 nm excitation. CIE color co-ordinates of Na(2)Sr(PO(4))F:Dy(3+)…
The end groups of bacterial poly(3-hydroxybutyrate) (PHB) were analyzed by 1 H and 31 P NMR spectroscopy and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). A PHB component having a molecular weight around 200 000 Da was broken down into low-molecular-weight oligomers by ac…
Patterned macroporous titania (TiO2) materials have been synthesized via a shear-aligned rigid crystalline surfactant mesophase. The macropores inherit the hexagonal geometry of the water channels of the template. Scanning electron microscopy (SEM) and cut-section transmission electron microscopy (TEM) images show tha…
We present a fully ab initio ultrafast spin manipulation calculation in two-magnetic-center clusters with CO attached to one of the magnetic centers. CO serves as an experimental marker for certain magnetic states between which spin flip and transfer can be achieved. The predicted spin-state-dependent CO vibrational f…
Previous studies have demonstrated that epidermal growth factor (EGF) can promote tissue regeneration effectively. The aim of the present study was to combine a collagen-binding domain (CBD) with native EGF (NAT-EGF) to form a fusion protein, aiming at that it could bind to collagen scaffolds specifically. This approa…
The present study examines the interaction of amine- and carboxyl- PEG core/shell quantum dots (QDs) with metal resistant bacterium Cupriavidus metallidurans CH34. The evolution of the number of QDs, their hydrodynamic radius, diffusion coefficients, and single particle fluorescence were characterized before and durin…
A novel Nd(3+)-doped lead fluorosilicate glass (NPS glass) is prepared by a two-step melting process. Based on the absorption spectrum a Judd-Ofelt theory analysis is made. The emission line width of NPS glass is 44.2 nm. The fluorescence decay lifetime of the (4)F(3/2) level is 586+/-20 microsec, and the stimulated e…
The problem of Andreev reflection between a normal metal and a multiband superconductor is addressed. The appropriate matching conditions for the wave function at the interface are established on the basis of an extension of quantum waveguide theory to these systems. Interference effects between different bands of the…
In situ observations of the domain evolution and the polarization rotation under bipolar cyclic and static electric fields are carried out for [001]-oriented $68\text{Pb}({\text{Mg}}_{1/3}{\text{Nb}}_{2/3}){\text{O}}_{3}\text{\ensuremath{-}}32{\text{PbTiO}}_{3}$ (PMN-32PT) single crystal which is located at the morpho…
The electronic structures of $\text{Ba}{(\text{Fe},\text{Ru})}_{2}{\text{As}}_{2}$ and $\text{Sr}{(\text{Fe},\text{Ir})}_{2}{\text{As}}_{2}$ are investigated using density functional calculations. We find that these systems behave as coherent alloys from the electronic structure point of view. In particular, the isoel…
Motivated by pressure experiments on CaFe 2 As 2 , we propose a scenario based on local-moment physics to explain the simultaneous disappearance of magnetism, reduction of the unit cell volume, and decrease in resistivity. In this scenario, the low-pressure magnetic phase derives from Fe moments, which become screened…
Using femtosecond pump-probe spectroscopy with pulse-shaping techniques, one can generate and detect coherent phonons in chirality-specific semiconducting single-walled carbon nanotubes. The signals are resonantly enhanced when the pump photon energy coincides with an interband exciton resonance, and the analysis of s…
In scope of this paper, dielectric and electro-optic properties of planar aligned ferroelectric liquid crystals/carbon nanotubes dispersions were investigated. It is demonstrated that even a small concentration of nanotubes greatly affects the performance of the liquid crystal cells. The obtained experimental results…
In the present work, coated tungsten carbide tool inserts of ISO P-40 grade were subjected to deep cryogenic treatment at −176°C. Turning studies were conducted on AISI 1040 workpieces using both untreated and deep cryogenic treated tungsten carbide cutting tool inserts. The turning performance was evaluated in terms…
The nature and value of the order parameters (OPs) in the superconducting Fe-based oxypnictides ${\text{REFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ ($\text{RE}=\text{rare}$ earth) are a matter of intense debate, also connected to the pairing mechanism which is probably unconventional. Point-contact Andreev-reflection…