Báo cáo hóa học: " Properties of gold nanostructures sputtered on glass" potx

... the last one plays a role only in thin layers, and it is responsible for the reduction of the electric conductivity of thin layers [8]. Mathematical formula for the calculation of relaxation times ... nanoparticle decreases [5-7]. Properties of metal layers are affected by electron scattering on phonons, on imperfections, and at layer boundaries. While the first two types of s...

Ngày tải lên: 21/06/2014, 06:20

... been demonstrated that properties of new prospective materials depend not only on their chemical composition but also on the dimensions of their building blocks which may consist of common materials ... again for higher thicknesses due to the formation of continuous gold Table 1 Atomic concentrations AU layer thickness Temperature Atomic concentrations of elements in at.% CC...

Ngày tải lên: 20/06/2014, 22:20

... operate in radiation hard conditions. In this paper, we have investigated the effect of 2 MeV He+ ion irradiation on the optical properties of ZnO nanorod-based LEDs. There are only few reports ... about the effect of high-energy electrons irradiation that has been reported for ZnO [15], GaN [16–17], and SiC [18]. Effect of ion and electron irradiation on the properties of...

Ngày tải lên: 20/06/2014, 04:20

... Open Access Properties of nanocones formed on a surface of semiconductors by laser radiation: quantum confinement effect of electrons, phonons, and excitons Artur Medvid * , Pavels Onufrijevs ... effect on properties of particles and quasi-particles, such as mobility and intrinsic con- centration of electrons a nd holes, energy of excitons, phonons, and plasmons. Therefore...

Ngày tải lên: 20/06/2014, 22:20

... the relation of Vickers hardness and ZnO content. The other lower line indicated the relation of fracture toughness and ZnO content. Figure 4. Dielectric constant and dielectric loss of PMNT/ZnO ... relation of dielectric constant and ZnO content. The other lower group showed the relation of dielectric loss and ZnO content. These values were obtained from sample measurement at...

Ngày tải lên: 20/06/2014, 23:20

... segregation depends on the oxidation conditions. In particular, neither evaporation nor diffusion of Au or Pt in SiO 2 layer takes place during thermal oxidation in dry O 2 . On the contrary, oxidation ... observed evolution of Pt and Au concentration profiles indicates the complete rejection of Me atoms from the oxide during ther mal oxidation of a-S i:Me layer. The detailed anal...

Ngày tải lên: 21/06/2014, 05:20

... Si-np. ThepresenceofPLofNd 3+ ions unde r non-resonant excitation evidenced the efficient energy transfer between Si-np and Nd 3+ ions (Figure 6). The concentra- tion quenching of the PL of Nd 3+ ions that ... containing a small quantity of non-radiative recombination channels. It was demonstrated that the PL of Nd 3+ ions was quenched at high Nd-concentration (4.9 at.%) because of...

Ngày tải lên: 21/06/2014, 05:20

... incor- poration of excess arsenic f ollowed by the formation of As clusters introduces many nonradiative recombination centers in the AlGaAs capping layer, which greatly reduces the PL from the QW. By contrast, ... of GaAs quantum dots on (001), vicinal (001), (110), and (311)A GaAs. J Cryst Growth 2009, 311:1839. 11. Li AZ, Wang ZM, Wu J, Xie Y, Sablon KA, Salamo GJ: Evolution of H...

Ngày tải lên: 21/06/2014, 06:20

... absorption and collection. Hence, the very low currents currently obtained are not a concern. Fabrication of Single-Junction Silicon Quantum Dot Solar Cell on Quartz Substrate Alternating layers of ... min [10, 11]. Formation of metal contacts (metallisation) is done by: (1) thermal evaporation of aluminium, (2) photo-lithogra- phy to define mesa areas, (3) CF 4 :O 2 reactive ion etc...

Ngày tải lên: 21/06/2014, 07:20

... denser flavonoids presented higher Au(III) conversion, e.g., when flavonoids content was above 1.25 mg ml -1 , the responding conversions were over 95%. Therefore, content of flavonoids of the plants, ... flavonoids content (C F ) versus the con- version of Au(III) was obtained in this research, as shown in Fig. 2. All of the broths with flavonoids content exceeding 0.6 mg ml -1 demonstrat...

Ngày tải lên: 21/06/2014, 17:20