the optical properties of junctions

... ions) on the physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion ... comparison of the PL spectra of the ZnO NRs before and after the He+ ion irradiation is shown in Figure 2d It shows that the PL intensity of the near-band-edge decrease and the PL intensity of the deep ... The EL spectra reveal the same blue shift in the green emission as observed from the PL spectra The irradiation has a minor effect on the color-rendering properties of the LEDs It decreases the...

Ngày tải lên: 18/06/2014, 22:20

... ions) on the physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion ... comparison of the PL spectra of the ZnO NRs before and after the He+ ion irradiation is shown in Figure 2d It shows that the PL intensity of the near-band-edge decrease and the PL intensity of the deep ... The EL spectra reveal the same blue shift in the green emission as observed from the PL spectra The irradiation has a minor effect on the color-rendering properties of the LEDs It decreases the...

Ngày tải lên: 20/06/2014, 04:20

... defects in the AlGaAs capping layer are negligibly small The optical quality of the AlGaAs capping layer can be monitored by the PL intensity of the QW In the sample capped at 450°C, the PL intensity ... there was a clear difference in the optical qualities between the 200°C-capped sample and the others In the sample capped at 200°C, incorporation of excess arsenic followed by the formation of ... the PL intensity is almost the same as that of the 580°C sample Even in the sample capped at 350°C, the intensity still remains at almost 50% of that of the 580°C sample These results illustrate...

Ngày tải lên: 21/06/2014, 06:20

... to the band-gap for the undoped Si-nw Fig 11 shows how the FE for the B and P codoped Si-nw changes as function of the position of the dopants within the nanowire In the figure, the inset show the ... energies and the excitonic effects through the solution of the Bethe-Salpeter equation (BSE) [34] The effect of local fields is also included, to take into account the inhomogeneity of the systems ... increases as the impurity concentration lowers (the impurities here are located in the position of Fig 11), approaching asymptotically the value of the band-gap of the undoped Si-nw This is another indication...

Ngày tải lên: 16/03/2014, 15:15

... of the metal, dependence on the metal thickness and the study of optical properties of metal coated microspheres), the optical properties of metamaterials made with stacked hole arrays and the ... decide the timestepping At any point in space, the updated value of the H-field in time is dependent on the stored value of the H-field and the numerical curl of the local distribution of the E-field ... involved, however there is still a lot of work to in order to fully understand the properties of these modes, and exploit them Precisely, throughout this thesis the reader will find a part of the efforts...

Ngày tải lên: 29/05/2014, 18:40

... character of type-II heterostructures The other supporting evidence of the type-II luminescence is the linear dependence of the PL peak energies over the third root of the excitation density [20] The ... inset of Figure 3b shows the linear dependence of the PL peak energies and the third root of the excitation power Many researchers attributed the high energy PL peak to the transition of the wetting ... independent of the excitation power which is a typical feature of the type-I band transition Therefore, the interband transition of the GaSb QD would be the only proper origin of the high-energy...

Ngày tải lên: 20/06/2014, 20:20

... catalyst Page of (c) EDS (b) (103) ZnO NW nm Figure TEM images of 3SZO NW (a) The location and the size of the Au catalyst, the present of Au catalyst, is demonstrated the VLS method (b) The HR-TEM ... compressive stress because the chemical bonding distance of Ag-O is longer than that of Zn-O [35,36] In the case of 3SZO and 5SZO NWs, the surface of the SZO NWs is crumpled because of the stress by doping ... SAED pattern (inset) reveal the (103) primary growth plane of the 3SZO NW (c) TEM image of Ag cluster shape in the 3SZO NWs The inset is a HR-TEM image of the 3SZO NWs The metal cluster, red circle...

Ngày tải lên: 20/06/2014, 22:20

... blue-shift of the energy peaks of the order of several meV in the studied spectra These results were found for two quantum dot sizes, in the first one the characteristic quantities of the harmonic ... This is because the mean spatial separation between the electron and the hole increases, and therefore the Coulomb interaction decreases, as the energy of the quantum state increases The final result ... exists in the quantum dot Figures and reproduce the reported results quite well [5,8] regarding the enhancement of the nonlinear optical coefficients due to the quantum confinement of the exciton...

Ngày tải lên: 21/06/2014, 04:20

... character of type-II heterostructures The other supporting evidence of the type-II luminescence is the linear dependence of the PL peak energies over the third root of the excitation density [20] The ... of the excitation power which is a typical feature of the type-I band transition Therefore, the interband transition of the GaSb QD would be the only proper origin of the highenergy peak In the ... process of the sample, the InGaAs cap layer was doped with Si Because the dope concentration was relatively high, the Fermi level of the InGaAs layer may possibly be higher than the bottom of the...

Ngày tải lên: 21/06/2014, 17:20

... character of type-II heterostructures The other supporting evidence of the type-II luminescence is the linear dependence of the PL peak energies over the third root of the excitation density [20] The ... of the excitation power which is a typical feature of the type-I band transition Therefore, the interband transition of the GaSb QD would be the only proper origin of the highenergy peak In the ... process of the sample, the InGaAs cap layer was doped with Si Because the dope concentration was relatively high, the Fermi level of the InGaAs layer may possibly be higher than the bottom of the...

Ngày tải lên: 22/06/2014, 00:20

... clusters of nanowires The clusters may result from the situation that the nanowires not cover by the framework of AAO template but stand free incompletely When the alumina on the top of AAO template ... estimated that the length of the nanowires is about several tens of micrometers It corresponds with the thickness of the AAO template which we used TEM images of SnS nanowires formed within the AAO ... corresponding to the value of (101) planes of the orthorhombic SnS nanowires Energy dispersive spectrometer (EDS) analysis reveals that the product is composed of stannum and sulfur, and the ratio of the...

Ngày tải lên: 22/06/2014, 01:20

... time of heatsetting (air, solvent or water) and the tension applied to the substrates during heatsetting [11, 12] The essence of this paper is to determine the effect of time of heatsetting on the ... Figure Effect of time of heatsetting on the linearity of load extension in weft direction of knitted Ingeo™ Poly (lactic acid) Figure Mean effect of time of heatsetting on the linearity of load extension ... [PLA] Figure Mean [Ā] of effect of time of heatsetting on the tensile extension EM [%] of Ingeo™ Poly (lactic acid) 3.2 Linearity of load extension curve LT [-] The linearity of load extension curve...

Ngày tải lên: 05/09/2013, 16:10

... in the ECM, and the pH of the ECM control the filtering aspect of the ECM The ECM is a transit area for the passage of nutrients from the bloodstream into the cells and for toxins released by the ... improve the electrical functions of the ECM Therefore the composition and degree of toxicity of the ECM-glycocalyx interface will affect the electrical field and the flow of biocurrents in the ECM The ... between the inside of the cell and the outside of the cell The difference is known as the membrane potential • Because the membrane potential is created by the difference in the concentration of ions...

Ngày tải lên: 14/02/2014, 22:20

... disappearance of specific resonances without the concomitant appearance of other signals in other parts of the spectrum This result could be a consequence of the paramagnetic properties of Fe(II), ... Titration of CyaY with Fe2+ and Fe3+ Addition of Fe2+ induced the displacement of several resonances in the [1H,15N]-HSQC NMR spectrum of CyaY, but the most striking consequence of the addition was the ... induce a line ˚ broadening of 1–100 Hz in nuclei located within A of the binding site, depending on the molecular mass of the protein and the strength of the magnetic field The only exceptions are...

Ngày tải lên: 18/02/2014, 16:20

... in the apparent Km values for these substrates The interpretation of these results is complicated because the levels of uncoupling will be variable depending on the mutant and the nature of the ... binding In the case of the R258K mutant this may be allowed because of disordering of the lysine side-chain, as was previously observed for the R258Q mutant (Fig 1) [17] In the case of the R258H ... of mutations appears to be similar regardless of whether the prime substrate was penicillin G or ampicillin Utilization of 2-oxoglutarate by the R258 mutants The level of 2-OG conversion in the...

Ngày tải lên: 20/02/2014, 23:20

... compounds of interest in the prevention of colon cancer In the present study, we investigated the relationship of different structural factors of procyanidins, such as the mean degree of polymerization ... significantly absorbed in the intestinal tract, and reach the colon mainly intact [27] They are therefore bioavailable to the epithelial cells in the intestinal wall, where procyanidins and other phenolics ... spectroscopy to test the radical-scavenging capacity of the fractions The results show that the oligomeric fractions (VIIIG, IVG, VIIIP and IVP), which were the most effective in the previous assays...

Ngày tải lên: 07/03/2014, 05:20

... domain of PABPN1 consisting of amino acids 1–125 of the wild-type protein (N-WT) Because the aim of this study was to investigate the effect on the fibrillation properties of the most extreme disease-associated ... using the nanoscope analysis software Chemical stability of fibrils The chemical stability of fibrils was tested after the fibrillation process was completed (no further rise of ANS signals) The sample ... [26] The formation of amorphous aggregates was independent of the presence or length of the poly l-alanine sequence In contrast, no amorphous aggregates were observed with the N-terminal domain of...

Ngày tải lên: 07/03/2014, 11:20

... in isolation, they have an elevated tendency to self-associate To further characterize the nature of aggregation of FXR proteins, we have carried out a study of their aggregation properties using ... average diameter of 10 nm (Fig 6D) They also clustered together and were often found to be decorated with the uranyl acetate stain Taken together these results confirm a marked tendency of FXR constructs ... analysed the secondary structure content at different temperatures of FMRP Nt-KH1 (residues 1–280), the longest of the FMRP fragments we could obtain in a stable form (Fig 3A) The spectrum of Nt-KH1...

Ngày tải lên: 14/03/2014, 23:20

... in the affinity of the PLRP2 for micellar substrates, and probably allows the interaction of the enzyme with the substrate structure Whether the motion of the lid promotes the recognition of the ... 79 and resulting in the unmasking of the catalytic triad of the enzyme induced by the motion of the flap The accessibility of the active site can be tested using the ability of an organophosphate, ... of the PLRP2 subfamily The aim of our study was to investigate the contribution of the N-terminal and C-terminal domains to the particular behavior of hoPLRP2 The structural organization of the...

Ngày tải lên: 16/03/2014, 06:20

... Fourier transform (FFT) The numerical results for the four different sizes and geometries of the clusters are given in table The value of the gap energy decreases as the size of the cluster increases, ... sensitive to the surface effects and the shape of the silicon quantum dots The theoretical calculations are based on the empirical pseudopotential method (EPM) for the electronic structure of silicon ... resembles that of density -of- state spectrum in amorphous silicon and indicates the presence of amorphous silicon like structure in the film The disorder in the surface layer of the silicon particles...

Ngày tải lên: 16/03/2014, 15:31