Materials Literature
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Surface modifications of implants are frequently done using bioactive peptides. However, immune cells such as macrophages might evoke a rejection of an implant due to an undesired activation by the materials. Here, the influence of different strategies for peptide immobilization onto (poly)-vinylidene fluoride (PVDF)…
ABSTRACT Poly (butylene succinate‐co‐cyclohexanedimethylene succinate) (PBCSs), which are composed of various amounts of cyclohexanedimethylene succinate (CS) with butylene succinate (BS) were synthesized via polycondensation. The composition of PBCSs was analyzed by a 1H‐nuclear magnetic resonance (1H‐NMR). Crystalli…
Here we present a Brownian ratchet based on plasmonic interactions. By periodically turning on and off a laser beam that illuminates a periodic array of plasmonic nanostructures with broken spatial symmetry, the random thermal motion of a subwavelength dielectric bead is rectified into one direction. By means of the m…
Mixed phase TiO2 thin films of rutile and anatase type crystal orientations were deposited on Si substrates by pulsed laser deposition (PLD) technique. When annealed at 800°C at 1 mbar oxygen pressure for 3 h, the deposited films transform into a single phase of rutile type. Structural and morphological studies of the…
Abstract In this study, the characterization and growth kinetics of chromium carbide layer coated on AISI D3 cold-work tool steel by pack method thermo-reactive diffusion process in solid medium were carried out. Coatings were performed by using ferro-chromium powder as Cr source at 950, 1 000, 1 050 and 1 100 °C for…
Channel thickness of thin-film transistors (TFTs) having amorphous In-Ga-Zn oxide channels has been optimized based on the device performance characteristics including output characteristics, transfer characteristics, and bias stress stability. The device performance initially improved as the channel thickness increas…
Using density functional theory and non-equilibrium Green's function method, we investigated the magnetic and transport properties of small organic titanium-benzene sandwich clusters TinBzn+1 (n = 1-3). The results show that TiBz2 is nonmagnetic while Ti2Bz3 and Ti3Bz4 are ferromagnetic, and our prediction is in agree…
The high speed milling of silicon carbide was discussed by using flat end-mill 2 mm in diameter diamond coated tool. Ultra-precision high speed spindle attachment was used to achieve cutting tool rotation speed as high as 50,000 rpm. Special fixture was designed to minimize the chatter on work-piece surface during the…
Kopplung mit Schalter: Die Konkurrenz zwischen Ladungstrennung und -rekombination in künstlichen Photosynthesesystemen kann durch Verwendung einer photochromen dynamischen Brücke kontrolliert werden. Das lichtinduzierte Öffnen und Schließen der Brücke vermittelt die elektronischen Kopplung in Donor(D)-Akzeptor(A)-Paar…
Patent retrieval plays a very important role in product innovation design. However, current patent retrieval approaches lack semantic comprehension and association, and usually cannot capture the implicit useful knowledge at a semantic level. In order to improve the traditional patent search, this paper proposes a nov…
Glucose transport in Pseudomonas putida CSV86 is mediated via a periplasmic glucose-binding protein (GBP)-dependent putative glucose ABC transporter. Here we describe a homology model and functional characterization of GBP from CSV86 (ppGBP). A whole-cell [(14)C]-glucose uptake study revealed that glucose is transport…
The preparation of the homoleptic MM quadruply bonded complexes Mo2(O2CC6H4-p-X)4, where X = C≡C-H (I) or C≡N (II), is reported along with the solution characterization data and electronic structure calculations employing density functional theory. The compounds are colored orange (I) and red (II) due to the metal-to-…
A selective and efficient method of oxidizing benzyl alcohols to benzaldehydes and methyl benzoates by using 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) as oxidant is developed. One-step conversion of benzyl alcohols to methyl benzoates in methanol at room temperature for 12 hours is achieved without any catalysts. More…
The interactions of titania with water molecules were studied via photoelectron spectroscopy and density functional calculations of TiO(OH)2(-) and Ti(OH)4(H2O)n(-) (n = 0-5) clusters which are corresponding to the TiO2(H2O)(-) and TiO2(H2O)n+2(-) (n = 0-5) systems, respectively. Experimental observation and theoretic…
Square root photocurrent dependences of nanowires on light intensity were reported in the literature without clarification of the limiting effect. In this Letter, we derived a relation excellently fitting the observed nonlinearities and, intensifying the significance of the result, we demonstrated that the fit paramet…
Optical properties of periodic structures can be calculated using the transfer-matrix approach, which establishes a relation between amplitudes of the wave incident on a structure with transmitted or reflected waves. The transfer matrix can be used to obtain transmittance and reflectance spectra of finite periodic str…
Novel N 2 O 2 sequence of mononuclear amino acid metal(II) complexes ( 1a – 1e ) was synthesized from 5-fluorouracil (5-FU: A) and l -tyrosine (tyr: B) with Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) ions. The synthesized complexes were structurally characterized by analytical, spectral (FT-IR, UV–vis, 1 H NMR, FAB-Mas…
The resonance fluorescence spectrum (RFS) of a hybrid system consisting of a $p$-doped semiconductor quantum dot (QD) coupled to a metallic nanoparticle (MNP) is analyzed. The quantum dot is described as a four-level atomlike system using the density matrix formalism. The lower levels are Zeeman-split hole spin states…
We consider ferromagnetic instabilities of two-dimensional helical Dirac fermions hosted on the surface of three-dimensional topological insulators. We investigate ways to increase the role of interactions by means of modifying the bulk properties which in turn changes both the surface Dirac theory and the screening o…
Abstract Two new double thorium oxalates with sodium ions have been prepared and characterized by using scanning electron microscopy/energy‐dispersive spectroscopy (SEM/EDS), Raman spectroscopy and single‐crystal X‐ray diffraction. The crystal structure of Na4[Th(C2O4)4]·5.5H2O (1) contains infinite chains, [Th(μ2‐C2O…