Báo cáo hóa học: "Influence of Cobalt Doping on the Physical Properties of Zn0 9Cd0 1S Nanoparticles" docx

... distortion of the tetrahedral coordination of Co 2? ions and direct band gap absorption, while high cobalt concentration samples ([0.05 M) have more distortion of the tetrahedral coordi- nation of ... Discussions Determination of phase composition, structure and particle size are very important for the discussions on the physical properties. EPMA analysis determines...

Ngày tải lên: 22/06/2014, 00:20

... coefficients reflect the slope of polarization versus stress curves. The enhancement of piezoelectricity corresponds to the maxi- mum slope of the curve of Fig. 4aatr c , it is the change of magnitude of polarization ... 7:859 ˚ A being the lattice constants of the unstrained superlattice structure. We have examined the accuracy of our calcula- tions by studying...

Ngày tải lên: 22/06/2014, 00:20

... result of the modification of the nanostructure and the basic sites of the particles. Another phenomenon starts to occur on the surface of doped sam- ples, a segregation process of particles of metastable ... the catalysts. The results from the isotherms of the CO 2 adsorption are shown in Table 2. The CO 2 adsorption isotherms are very sensitive to the pr...

Ngày tải lên: 22/06/2014, 01:20

... loss in two steps, the initial one before 400 °C is due to decomposition of the functional groups, while the other one relates to the oxi- dation of the nanotubes. A weight loss of *17% for acid- MWCNTs ... functionalized MWCNTs. Thermoxidative Properties Figure 7a clearly shows the onset of the degradation tem- perature of the raw, acid and amine modified MWCNTs. I...

Ngày tải lên: 22/06/2014, 01:20

... effect of individual particles and the second power term is the contribution of particle–particle interaction. Another definitive equation for determining the modulus of a composite that contains spherical ... is based on the assumption that the Young’s modulus of the particulate inclusions (E f ) is greater than that of the matrix (i.e. E f ) E m ). In the present...

Ngày tải lên: 22/06/2014, 01:20

... to the strong 3D confinement, which demonstrates the *12 meV exciton binding energy in these dots. Due to the fact that the excitons in the WL easily interacted with the phonon and quenched, the integrated ... view of their potential in optoelectronic device applications. In this arena, it is well known that the GaAs substrate orientation has a large impact on the formati...

Ngày tải lên: 22/06/2014, 19:20

... presented in Section 6, the value of the decision variable is assessed for each transmitted symbol during the simulation and the deci- sion on the correct/erroneous reception of symbols is taken by ... aspects of each connection, such as the generation of the application-level traffic and the users’ TCP or UDP dynamics; at the core- network side, instead, the ULS t...

Ngày tải lên: 22/06/2014, 06:20

... functional equations in a single variable, including the nonlinear functional equations, the linear functional equations, and a generalization of functional equation for the square root spiral. The ... equation,” Proceedings of the National Academy of Sciences of the United States of America, vol. 27, no. 4, pp. 222–224, 1941. 2 T. Aoki, On the stability of the...

Ngày tải lên: 22/06/2014, 06:20

... However, the role of the PP2.2 motif in virus replication is controversial; although a mutation of this motif in the context of the genotype 1b sub-genomic replicon had variously either no effect ... molecule containing the 5' and 3' untranslated regions of the viral genome. However, apart from the RNA-dependent RNA polymerase (NS5B), the precise details of...

Ngày tải lên: 20/06/2014, 01:20