Browsing Faculty of Science by Issue Date
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Structural, optical and photocatalytic properties of pvc/cds nanocomposites prepared by soft chemistry method
(Springer, 15092020)This work investigates the preparation of cadmium sulfde nanoparticles (CdS) embedded in the polymeric polyvinylchloride (PVC) matrix. PVC/CdS nanocomposite flms were prepared via sol–gel method with deposition by spincoating ... 
Sedimentation rates in the central lake constance determined with210Pb and137Cs
(BirkhäuserVerlag, 1987)Sediment cores from central Lake Constance were dated with210Pb and137Cs. A sedimentation rate of (0.11±0.02) g·cm2·y1 was determined with the210Pb method.137Cs measurements revealed sedimentation rates of (0.11±0.01) ... 
Moleculardynamics study of selfinterstitials in silicon
(American Physical Society, 1987)Results of a moleculardynamics computer simulation are presented for atomic relaxations and relaxation energies for selfinterstitials in a silicon crystal. The StillingerWeber model potential containing two and threebody ... 
Scanningtunneling microscopy at small tiptosurface distances
(1987)The scanningtunneling microscopy (STM) of graphite at small tiptosurface distances is investigated using the selfconsistentfield pseudopotential method. We have calculated potential, charge density in the region between ... 
Longrange order and segregation in semiconductor superlattices
(1987)Results of selfconsistent energyminimization calculations provide strong evidence that the ordered phases in epitaxially grown Ga1xAlxAs and strained Si1xGex alloys are metastable, in the sense that segregation into ... 
Metallization of Silicon upon Potassium Adsorption
(1987)We report novel features of potassium deposition on a Si(111)(2×1) surface as a function of coverage. The binding is ionic even at the saturation coverage without any overlayer metallization. Up to a threshold coverage, ... 
Efficiency calibration and summation effects in gammaray spectrometry
(Kluwer Academic Publishers, 1988)Precise, absolute γray efficiences (∈γ) and total efficiences (∈T), have been measured at various distances from the detector, using a set of standards. The observed linear variation of ∈γ and ∈T as well as ∈γ/∈T with Eγ ... 
An isomorphism theorem for Dragilev spaces
(BirkhäuserVerlag, 1988)Necessary and sufficient conditions for an Ly(a, l)space to be isomorphic to some Lg(b, m)space have been found. 
Critical relaxation of the twodimensional threestate Potts model with conserved dynamics
(Institute of Physics (Great Britain), 1988)The dynamical critical exponent z is obtained using the finitesize scaling method for the twodimensional threestate Potts model with conserved dynamics. It is observed that there is a change in the dynamical behaviour ... 
Sorption of cesium and strontium on montmorillonite and kaolinite
(De Gruyter Oldenbourg, 1988)Sorption characteristics of Cs+ and Sr++on montmorillonite and kaolinite type clays and soil fractions from various regions of Turkey were studied using the batch method. 137Cs and 90Sr were used as tracers. Concentrations ... 
Sorption/desorption of Cs on clay and soil fractions from various regions of Turkey
(Elsevier, 1988)The sorption desorption behaviour of Cs ion in the concentration region of 10−8 to 10−4 meqml−1 have been studied using clay and soil fractions from various regions of Turkey. The sorption curves for all the material studied ... 
C∗actions on Grassmann bundles and the cycle at infinity.
(Aarhus Universitet * Mathematica Scandinavica, 1988)We describe the Grassmann Graph construction of MacPherson in the analytic category using a C∗action and the corresponding BialynickiBirula decomposition. It is shown that the cycle at infinity is analytic in the compact ... 
Effect of tip profile on atomicforce microscope images: a model study
(American Physical Society, 1988)Adopting the empirical silicon interatomic potential of Stillinger and Weber, we investigate the effect of the tip profile on the atomicforce microscope images for a prototype system, Si(001)(2×1), and conclude that the ... 
Surface metallization of silicon by potassium adsorption on Si(001)(2×1)
(American Physical Society, 1988)We present the detailed results of selfconsistent and geometryoptimized totalenergy, bandstructure, and chargedensity calculations for a potassiumcovered Si(001)(2×1) surface, and for an unsupported potassium ... 
DeltaDoping in strained (Si) / (Ge) superlattices
(American Physical Society, 1988)We present a comparative study of the pseudomorphic (Si)6/(Ge)6 and doped (Si)3(Sb)(Si)2/(Ge)6 superlattices using the selfconsistent pseudopotential method. The strained (Si)6/(Ge)6 superlattice has the lowest conductionband ... 
Electronic structure of strained Sin / Gen (001) superlattices
(Pergamon Press, 1988)Using the empirical tight binding method we have investigated the electronic properties of the Sin/Gen(001) strained superlattices as a function of the superlattice periodicity and the band misfit. For n ≥ 4 we have found ... 
Tip induced localized states in scanning tunneling microscopy
(Institute of Physics Publishing Ltd., 1988)We have investigated the Scanning Tunneling Microscopy (STM) of graphite with varying tiptosurface distance. Using an LCAO type approach we showed that at small separations states are localized between the tip and the ... 
Calculations of STM linescansgeneral formalism
(Pergamon Press, 1988)We have developed a formalism for calculating the line scans of the scanningtunneling microscopy from the realistic substrate and tip wave functions. The tip wave functions are calculated selfconsistently by using a ... 
Simulated annealing for texture segmentation with Markov models
(IEEE, 1989)Binary textured images are segmented into regions of different textures. The binary Markov model is used, and model parameters are assumed to be unknown prior to segmentation. The parameters are estimated using a ... 
A Monte Carlo study of the BNNNI model
(IOP Publishing, 1989)The biaxially nextnearestneighbour Ising (BNNNI) model is studied using the Monte Carlo procedure. The structure factor is used to identify the possible phases of the system. At intermediate temperatures, evidence for ...