Báo cáo hóa học: " Surface Morphology Evolution of GaAs by Low Energy Ion Sputtering" pdf

... rate of erosion of the unperturbed planar surface; t x and t y represent the effective surface tensions generated by the erosion process [13]; D x , D y and D xy denote the surface relaxation ... smaller threshold energy and longer characteristic wavelength, yet the profile moves upwards. Conclusions In summary, the Ar + sputtering induced GaAs( 100) surface morphology evolu...

Ngày tải lên: 22/06/2014, 18:20

... estima- tions allow finding basic features of surface modification of two powders of different origins, diamond and ZnO. UV illumination leads to increasing the surface free energy making the surface ... surface free energy due a deep modulation of its polar component, resulting in variation of elementary surface interactions. The electron-induced modification of the s...

Ngày tải lên: 22/06/2014, 00:20

... Z-Q, Ozaki Y: Surface- enhanced Raman scattering of biological molecules on metal colloid II: effects of aggregation of gold colloid and comparison of effects of pH of glycine solutions between gold ... μg·l -1 were prepared by diluting a stock solution of 10 6 μg·l -1 with DI water. Preparation of Ag nanofilms The Ag films deposited on glass slides were prepared by reduc...

Ngày tải lên: 21/06/2014, 04:20

... and pathologic findings of this unusual condition. The series of cases in our region with rapid severe progressive hip joint destruc- tion within few months drew our attention, which we think need ... formation has been observed and no osteophytes have been found, which are typical of ordinary coxarthrosis. Findings such as more rapid and more pervasive invasion, lack of a line of d...

Ngày tải lên: 20/06/2014, 01:20

... results .Of( a)p -GaAs( 100),(b)n -GaAs( 100),(c) p -GaAs( 711), and (d) n -GaAs( 711) as a function of the applied bias voltages and the loading forces. Figure 7 Oxide height profiles of p -GaAs( 100), n -GaAs( 100), ... following Poisson’s equation: −∇ · (ε 0 ε r ∇V) = ρ Figure 3 AFM local oxidation results .Of( a)p -GaAs( 100),(b)n -GaAs( 100),(c) p -GaAs( 711), and (d) n -GaAs( 711) a...

Ngày tải lên: 20/06/2014, 22:20

... distinction between one’sperceptionofthe emotion(s) expressed by music and the emotion(s) induced by music. Studies of the distinctions between perception and induction of emotion have demonstrated Trohidis ... classification approach could overcome this pro- blem, by allowing the specification of multiple finer- grain emotion classes. 2.2. Regression Emotion recognition is modele...

Ngày tải lên: 20/06/2014, 22:20

... dispersion and a high degree of reduction of Mn oxides formed by Mn acetate than those formed by Mn nitrate. Keywords: Al-SBA-16, Mn precursors, benzene, ozone, catalytic oxidation Introduction Hazardous ... conversion. In this study, the gas-phase reaction of benzene with ozone was shown to be negligible. Results and discussion Characterization of Al-SBA-16 Table 1 lists the text...

Ngày tải lên: 20/06/2014, 23:20

... distinction between one’sperceptionofthe emotion(s) expressed by music and the emotion(s) induced by music. Studies of the distinctions between perception and induction of emotion have demonstrated Trohidis ... classification approach could overcome this pro- blem, by allowing the specification of multiple finer- grain emotion classes. 2.2. Regression Emotion recognition is modele...

Ngày tải lên: 21/06/2014, 00:20

... the deposition pressure. Below 5 × 10 -6 torr, t he size of the individual grains is smaller than 100 nm. There was a relationship between rate of meta llic deposition and subsequ ent surface roughness, ... from evaporation. The detection sensitivity of fiber-optic nanoprobes depends mainly on the extremely small excitation or detection volume set by the aperture sizes and penetrati...

Ngày tải lên: 21/06/2014, 08:20

... study the optical emission of single GaAs quantum dots (QDs). The QDs are fabricated by filling of nanoholes in AlGaAs and AlAs which are generated in a self-assembled fashion by local droplet etching ... the QDs were capped by a 120-nm-thick Al 0.35 Ga 0.65 As barrier. Types of GaAs Quantum Dots Figure 1a shows an atomic force microscopy (AFM) image of the AlGaAs surface...

Ngày tải lên: 21/06/2014, 17:20