and photo luminescence of silicon rich oxide films obtained by lpcvd

... of Nd3+-doped silicon- rich silicon oxide films Mater Sci Eng 2008, 146:179 14 Bréard D, Gourbilleau F, Belarouci A, Dufour C, Rizk R: Nd3+ photoluminescence study of Nd-doped Si -rich silica films ... content on the structural and photoluminescence properties of silicon- rich silicon dioxide thin films Nanoscale Research Letters 2011 6:161 Submit your manuscript to a journal and benefit from: Convenient ... condensation of Si-np that were detected by XRD (see Figure 4) and HRTEM (see Figure 5) Besides, the presence of Si-np in the films was confirmed by the occurrence after annealing of a 740-nm broad PL band...

Ngày tải lên: 21/06/2014, 05:20

... Table compares the relative composition of shiitake extracts obtained by SFE with CO2 (40 °C and 20 MPa) and by COSE with DCM and EtAc The identified components and the respective molecular weights ... detection of minimum inhibition concentration Samples of supercritical extracts obtained at different conditions of temperature and pressure and SFE with 15% ethyl acetate as co-solvent at 40 °C and ... antifungi activity were obtained from supercritical CO2 at 15 MPa and 30 °C and 40 °C The results of the biological activity of shiitake extracts obtained using high-pressure and low-pressure techniques...

Ngày tải lên: 28/06/2014, 11:20

... rotations and physical properties of SRO films may contribute to a better understanding of the origin of the tunable physical properties Also, the effect of oxygen content, film 28 Chapter thickness and ... perovskite oxides The chemically simple structure and robust properties of perovskite oxide ferroelectrics have attracted a lot of attention and stimulated development in both fundamental understanding ... rotations and anticlockwise rotations are indicated by m and n respectively Missing signs are determined by the relative senses of rotations along the axis, denoted by + for in-phase rotation and –...

Ngày tải lên: 09/09/2015, 11:09

... effects of size and shape of Si-nc on the incorporation of group-III (B and Al), group-IV (C and Ge) and group-V (N and P) impurities Single-doping has been investigated both in spherical and faceted-like ... the FE and the electronic properties of the Si-nc are influenced by the insertion of more and more impurities We call this insertion of several impurities multidoping Fig shows how the FE of a large ... electronic properties of B- and P-codoped Si-nc are qualitatively and quantitatively different from those of either B- or P- single-doped Si-nc The presence of both a n and a p impurity leads...

Ngày tải lên: 16/03/2014, 15:15

... pentagonal and hexagonal SiNWs along the /11 0S direction Justo et al [24] reported classical molecular dynamic simulations of silicon nanowires of various shapes and orientations Menon [20] and Ponomareva ... two- and three-body interaction terms and were originally fitted to describe the crystalline and liquid silicon phases This potential consists of sums of two- and three-body interaction contributions ... mechanical properties of the SiNWs In order to investigate the relative influences of Fig Top and side views of the optimized structures of single crystalline SiNWs temperature, strain rate and cross-sectional...

Ngày tải lên: 16/03/2014, 15:18

... ratio of Si/C/O of the nanowires is about 3:2:2, which corresponds well to the standard SiC and SiO2 The small quantity of oxygen may come from the resident oxide layer The IR spectrum of the ... supported by the Creative Research Group of National Science Foundation of China (Grant no 50721003), the Foundation of the Ministry of Education of China for Returned Scholars (Grant no 2005383) and ... products mainly consist of b-SiC nanowires By means of XRD, SEM, EDS, IR and TEM (HR-TEM), b-SiC nanowires have been characterized and discussed in detail The growth direction of nanowires lies along...

Ngày tải lên: 16/03/2014, 15:21

... arc-lamp, excitation at 275 nm) of the three tungsten oxide nanorod samples of various lengths dissolved in dichloromethane Figure Photoluminescence spectra of tungsten oxide nanorods; 25 ( nm (short), ... nanorods of cobalt oxides, and we are currently investigating the generality of our method for the preparation of soluble 1-D nanostructured metal oxides Acknowledgment This work was supported by the ... and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar PL pattern with two emission maxima, yet at much lower energies of 2.8 and...

Ngày tải lên: 20/03/2014, 13:08

... principle, k and ε0 can be obtained by ∂V/∂ε0 = and ∂V/∂k = 0, We defined r as the weighted ratio of elastic constant of the film and the substrate r= (4) Mf h f Ms h s and Troom where af(T) and as(T) ... Page of Figure The determination of Raman (a) Micro-Raman spectra of the cross-section are obtained by scanning from the bottom of the interface to the surface (b)The phonon frequencies of the ... curves of (0002) and (1012) were obtained and the full widths at half maximum (FWHM) were 970 and 1358 arc seconds, respectively The phi scan presents a sixfold symmetry of wurtzite structure of...

Ngày tải lên: 21/06/2014, 06:20

... TEM image of the wires (Fig 4c and the inset of Fig 5a) The chemical composition of these SiC NWs were checked by EDS, and the result is shown in Fig 4d.The nanowires are composed of silicon (38.91 ... because of higher melting point and faster solidification speed of SiC than SiO2, which is consistent with the previous reports [28, 29] Photoluminescence Property of SiC NWs Figure shows the Photoluminescence ... and more silicon and carbon atoms were adhere to the surface of the SiC nanoparticles, and then most of them moved to the lowest energy plane of SiC when supersaturated The surface energy of {111}...

Ngày tải lên: 22/06/2014, 00:20

... promoted not only by basic sites but also by acidic sites of the oxide catalysts Thus, it may be suggested that the control of surfaces and modifications of the nanostructures of the tin oxide particles, ... Conversion/Selectivity (%) ð1Þ The effects of the process of segregation and de-mixing of these rare earths on the SnO2 catalytic properties were studied and compared In spite of the relatively low specific ... in the annealing temperature Table The total and irreversible CO2 adsorption capacity, uptake at 27 and 300 °C, of undoped and doped samples of tin oxide Total CO2 adsorption (lmol/m2) Irreversible...

Ngày tải lên: 22/06/2014, 01:20

... 3i and 3j) An overview of immunolabelling of JIM11 and JIM20 epitopes in different cell types and embryogenic stages is summarized in Table Effect of 3,4-DHP treatment and immunomodulation by ... around 220 and 125 kDa, respectively (Figure 1) These immunoblot results were corroborated by immunofluorescence labelling data Immunolocalization of HRGPs in NECs, ECs and somatic embryos of different ... extensins of monocots are less glycosylated and exist in a random coil conformation [32] Monoclonal antibodies JIM11 and JIM20 recognize specific arabinosylation patterns of HRPGs such as extensins and...

Ngày tải lên: 11/08/2014, 11:21

... % The change of the direction of easy axis might be caused by the random distribution of Ag in the 19 FePt thin films Nitride and Oxide such as AlN,74 Si3N4,75 AlOx,76 MgO77-78, and SiO279,80 ... structure of FePt films and coercivity values for FePt thin films grown on corning glass and MgO substrates with different structures X List of figures Figure 1-1 Growth curve of areal density of magnetic ... with 0.25 nm and nm Ag top layers Figure 5-6 TEM images and SAED patterns of the FePt films without Ag top layer (a and c) and with nm Ag top layer (b and d) Figure 5-7 HRTEM images of the FePt...

Ngày tải lên: 13/09/2015, 21:23

... detachment of atoms from islands and diffusion of atoms on the substrate surface to attach to other islands, resulting in the shrinkage and even disappearance of some islands and the growth of other ... per atom in an island will be a function of the island size and of the total surface and interface energies of the island Because the surface and interface energy are a function of the crystallographic ... anisotropy and growth mechanism of thin films are reviewed, which provides the background to understand this work 1.2 Magnetic anisotropy and coercivity of thin films 1.2.1 Magnetic anisotropy of films...

Ngày tải lên: 14/09/2015, 14:12

... materials, and the development of alloying and phase separation of CoCrPt films A: Limitation of the investigation of SRO and phase miscibility by conventional XRD Structural characterization of solid ... controlled by the alloy composition and the degree of phase separation of Co and Cr, the alignment of the columnar structures, the degree of Cr segregation at grain boundaries and the mosaic of the ... signal to noise ratio17 and coercivity.16 Cr rich grain boundary Co rich grain Figure 1.3 A schematic diagram of Co rich grain and Cr rich grain boundary 1.2.4 Effects of Pt on coercivity (Hc)...

Ngày tải lên: 16/09/2015, 17:11

... equiatomic and Rh -rich 48 FeRh thin films 4.2.2.2 Magnetic properties of equiatomic and Rh -rich FeRh 49 thin films 4.2.2.3 Temperature dependentcrystallographic texture and 51 magnetic properties of ... multiplied by a factor of √2 of (a) Fe50Rh50 and (b) Fe48Rh52 thin films of thicknesses 5nm, 10nm, 20nm, 50nm, 100nm and 200nm 50 ix Figure 4.9 Magnetic-Thermal hysteresis of (a) equiatomic Fe50Rh50 and ... 100nm, 50nm and 20nm 56 Figure 4.12 Magnetization, lattice parameter-c, and lattice parameter-a multiplied by factor of 2 , and volume of unit cell of Fe52Rh48, Fe50Rh50, and Fe48Rh52 thin films epitaxially...

Ngày tải lên: 02/10/2015, 17:15

... sensitivity to measure films of sub-micron dimensions Keddie and Jones also performed a study on different substrates, gold and silicon oxide, on the Tg of ultra- thin films of poly(methyl methacrylate) ... polymer and native oxide surface of silicon wafer was expected as compared to PMMA with the same substrate due to the chemistry of P2VP.29 Fryer et al 11 showed the dependence of Tg of polymer films ... failures of adhesion to metals and degradation of dielectric properties The dimensions of the films will also be affected by water due to swelling Thus the moisture sorption behaviour of polyimide films...

Ngày tải lên: 05/10/2015, 19:04

... equiatomic and Rh -rich 48 FeRh thin films 4.2.2.2 Magnetic properties of equiatomic and Rh -rich FeRh 49 thin films 4.2.2.3 Temperature dependentcrystallographic texture and 51 magnetic properties of ... multiplied by a factor of √2 of (a) Fe50Rh50 and (b) Fe48Rh52 thin films of thicknesses 5nm, 10nm, 20nm, 50nm, 100nm and 200nm 50 ix Figure 4.9 Magnetic-Thermal hysteresis of (a) equiatomic Fe50Rh50 and ... 100nm, 50nm and 20nm 56 Figure 4.12 Magnetization, lattice parameter-c, and lattice parameter-a multiplied by factor of 2 , and volume of unit cell of Fe52Rh48, Fe50Rh50, and Fe48Rh52 thin films epitaxially...

Ngày tải lên: 06/10/2015, 21:06

... respectively and a vertical tilt of 7° for every implant BF2 core implant was done with dose of 2.5 x 1013 cm-2 and energy of 80 keV; phosphorus shell implant was done with dose of 1015 cm-2 and energy of ... SiNCs by photoluminescence Considering its relative simplicity [26], photoluminescence (PL) spectroscopy has been employed in numerous experimental studies of photoelectric properties of Si 26 ... impact of series resistance (Rs) on fill factor (FF) and PCE of the device Significant improvement of performance could be expected by eliminating the effect of Rs In addition, as a promising and...

Ngày tải lên: 12/10/2015, 17:35

... and then electrochemically etched in absence and also in presence of 400-W UV radiations separately The crystalline composition of the samples along the depth of the oxide layer was checked by ... phases (Tix O ≡ Ti3 O and Ti6 O) Basically Ti3 O and Ti6 O are titanium rich non-stoichiometric oxide phases and are isostructural to titanium The isostructural property of these oxide phases is inferred ... 2θ positions of their reflections in the XRD patterns and that of Ti, when compared with the standard JCPDS files The probable reason for the surface of the samples to be rich in TiO2 and the bulk...

Ngày tải lên: 19/03/2014, 16:47

... occurrence of mitochondrial swelling, a marker of permeability transition The duration of D and R phases was 1.05 and 0.77 s, respectively The rate of fluorescence changes in D and R phases was 15 and ... The effect of singlet oxygen on PTP, and the involvement of PTP in MMPFs induced by photodynamic action are still questions open to debate Contrasting data obtained by the same group of investigators ... of single mitochondria, and some representative traces are shown in Figs 2B and The exact identification of depolarization phases (D phases) and repolarization phases (R phases) of MMPFs was obtained...

Ngày tải lên: 30/03/2014, 16:20