photo control of the structural and optical properties of

... 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 ... 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 ... 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...

Ngày tải lên: 20/06/2014, 20:20

... 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 ... 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 ... performed for the optical properties of the sample at 20 K using the source of a 532-nm line, and the excitation power is changed from mW to 30 mW Results and discussion In order to characterize the density,...

Ngày tải lên: 21/06/2014, 17:20

... 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 ... 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 ... performed for the optical properties of the sample at 20 K using the source of a 532-nm line, and the excitation power is changed from mW to 30 mW Results and discussion In order to characterize the density,...

Ngày tải lên: 22/06/2014, 00:20

Ngày tải lên: 22/03/2014, 11:20

... draft of the manuscript JHA analyzed the properties and helped draft the manuscript KNH and KSH detailed the original idea and modified the first draft of manuscript YGS finalized the manuscript and ... http://www.nanoscalereslett.com/content/7/1/26 temperatures on the structural properties of the films has been investigated, and the optical properties of the films have also been analyzed Methods Synthesis ZnS films were deposited ... temperatures The band gap of the film also decreased with the temperature up to 400°C (Eg = 3.76 eV) These results indicate that an increase in the substrate temperature improves the band gap energy of the...

Ngày tải lên: 20/06/2014, 21:20

... light the sensitizing effect of Si-np towards Nd3+ ions The evolution of the integrated PL intensity of the Sinp PL band and the 920-nm PL peak is shown in the inset of Figure The enhancement of the ... underlines the strong coupling between Si-np and Nd 3+ ions, and, accordingly, the potential of sensitizing of Si-np The increase of the PL intensity of Nd 3+ is then explained by the increase of the ... related to the increase of the number of Si-OSi bonds at the SiO x /Si-np interface [19,20], i.e., the increase of the density of Si-np [21] Figure presents the evolution of the FTIR spectra of samples...

Ngày tải lên: 21/06/2014, 05:20

... studied the growth angle effect of the films for optical properties The thickness of the ZnO thin films was checked by FE-SEM and was fixed at 100 nm Three growth angles (0°, 15°, and 30°) of the ... wavelength of incidence rays and the growth angle The lowest average reflectance at 550 nm was measured with the 15° angled columnar thin film with a value of 8.67% The best optical properties of the ... c-1 To get a magnified view of the cross-section of the films, we enlarged the boxed section of the films, as shown in Figure 2a-2,b-2,c-2 The FESEM images confirm that the columnar ZnO films were...

Ngày tải lên: 21/06/2014, 17:20

... 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 ... determine the basic properties of the catalysts The results from the isotherms of the CO2 adsorption are shown in Table The CO2 adsorption isotherms are very sensitive to the presence of polar groups ... 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, undoped and doped with rare...

Ngày tải lên: 22/06/2014, 01:20

Ngày tải lên: 06/10/2015, 20:57

Ngày tải lên: 06/10/2015, 21:07

... approaching asymptotically the value of the band-gap of the undoped Si-nw This is another indication of how doping can modify the electronic and optical properties of the Si nanostructures Conclusions ... for the eye The dashed line corresponds 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 ... how 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...

Ngày tải lên: 16/03/2014, 15:15

... 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 and ... SZO NWs, and demonstrate that the doping control of ZnO NWs is possible by the concentration control of Ag wt.% in targets To understand the origin of the chemical bonding, binding energy of Ag ... 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...

Ngày tải lên: 20/06/2014, 22:20

... reveals that the product is composed of stannum and sulfur, and the ratio of the S atom and Sn atom is 1:0.985, which just accords with the stoichiometric ratio of SnS The representative optical absorption ... 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 ... determine the energy band gap, Eg, and the type of optical transition responsible for this intense optical absorption, and the absorption spectrum was analyzed using the equation for the near-edge absorption...

Ngày tải lên: 22/06/2014, 01:20

... 0.8 μm The lengths of the rod-like grains were of 2.0 to 2.5 μm As the temperature was increased to 1300oC, the grains became slightly larger, with diameters of 1.0 to 1.2 μm The lengths of the ... capacitance comprises the capacitance of the grain and air in the pores It is well known that the capacitance of air is very much less than that of the grains.17 Therefore, the less dense sample has a ... suggests that the grain growth occurs along orthorhombic a or b axes because these axes are longer than the c axis in the orthorhombic structure Structural and Dielectric Properties of the Mn-Doped...

Ngày tải lên: 07/08/2014, 14:20

... independently of the presence of AREs (Fig 6B, lanes and 5) It is possible that in the region located before the AREs, consisting of 343 bp of the 3¢ UTR of the IL-1b transcript, there is a putative ... mRNA and also of its own transcript For this reason, the level of mRNA for the wildtype form of MCPIP and the level of mRNA for IL-1b (Fig 5A, lane 3) were lower in comparison to the level of mRNA ... IL-1+ARE, MCPIP ⁄ IL-1)ARE and pcDNA3 ⁄ MCPIP The pcDNA3 vector served as a control for the experiment, and to equalize the amount of introduced genetic material The level of IL-1b and MCPIP transcripts...

Ngày tải lên: 18/02/2014, 14:20

... shown that the antibacterial ⁄ fungicidal properties of trappin-2 involve the cationic nature of the molecule, as assessed from the salt and heparin dependence of the antimicrobial and antifungal ... extract with the various tested proteins and the CFU counted The percentage of surviving CFU was calculated by the formula N ⁄ Ncontrol · 100, where N and Ncontrol were the numbers of CFU obtained ... We then examined the effect of heparin on the antimicrobial 2012 Fig Western blot analysis of elafin and trappin-2 fractionated on heparin-Sepharose The heparin-binding capacities of elafin and...

Ngày tải lên: 18/02/2014, 17:20

... the pore channels of support material Conclusions Figure HPLC-RID image of the products of D-glucose oxidation on PS-1 catalyst On the other hand, the reaction on Pt/SBA15 catalysts with pH control ... with the size under 6nm in the channels of SBA-15 and at this state, Pt/SBA-15 catalyst showed the highest activity and selectivity in the oxidation of glucose When increasing the content of Pt ... outside the channels of SBA-15 with size of 10-15nm and catalytic activities of these materials decreased pH value also affects directly on the selectivity of gluconic acid product and the best...

Ngày tải lên: 05/03/2014, 11:21

... [20]: koff ẳ koff2ị ẵibuprofen=K2 ẵibuprofenị ỵ koff3ị ẵibuprofen=K3 ẵibuprofenịị ỵ kỵ off 7ị where koff(2) and koff(3) indicate values of koff occurring at K2 < [ibuprofen] < K3, and at ... study and [20,21]) This indicates that the removal of domain I from HSA does not signicantly affect the functional and structural properties of domains I and II [i.e of the 1382 region of (t)HSA] ... K3 < [ibuprofen], respectively, and kỵ is the koff value obtained in the off absence of ibuprofen Data analysis Kinetic and thermodynamic data were analyzed with the matlab program (The Math Works,...

Ngày tải lên: 06/03/2014, 01:20

... for the wild type (WT) and mutant Tms The uncertainties listed are the standard errors of the mean and included the uncertainty in the determination of protein concentrations The values are the ... parameters for the thermal-induced unfolding of wild type (WT) and mutant Tms The values are the mean ± standard deviation of at least three experiments Tm1 is the midpoint of the thermal transition ... indicate that the main effects of mutations A63V, K70T and E180G are mainly related to the overall stability of the protein as a whole, rather than on the position of the mutation in the polypeptide...

Ngày tải lên: 16/03/2014, 18:20

... vs SCE The response of color change to the potential on the working electrode was evaluated by the transmittance at the wavelength of 633 nm The results show that all of the samples have the range ... from the surface observation of sample A As expected, the nanograins of WO3 were ultra-fine, and the mesoporosity arised from the scale of microstructural features such as zeolite-like level other ... thickness of the processed films was 190 nm and close to the profilometer result The interfaces of ITO to glass and WO3 to ITO of the sample can be seen However, it is not suitable for observing the...

Ngày tải lên: 20/03/2014, 13:08