synthesis and optical properties of au-ag alloy nanoclusters with controlled composition, p26

... Along with the Au and Ag emission peaks, there appeared carbon, oxygen and copper 20 nm 20 nm a b Synthesis and Optical Properties of Au-Ag Alloy Nanoclusters with Controlled Composition ... homogeneous Au/Ag alloy ones and the novel absorption bands are attributed to the SPR bands of Au-Ag alloy nanoparticles. Figure 2. Opti...

Ngày tải lên: 04/06/2014, 15:20

... Comparing the intensities of the (010) and (014) peaks of the sample with those of the bulk W 18 O 49 , it was found that the relative intensity of (010) has been dramatically increased ... nm), and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases. A similar PL pattern with two emission maxima, yet at much lower ene...

Ngày tải lên: 20/03/2014, 13:08

... on the magnetic and optical properties of the ferrite nanoparticles for a variety of magneto -optical nanodevice applications. From a synthesis point of view exploring the effect of firing temperatures ... conjugate its surface with various functional group s [32,33]. Also, the silica shell can enhance the optical properties of the nano- particles [34]. The optical...

Ngày tải lên: 21/06/2014, 01:20

... effects of size and shape of Si-nc on the incorporation of group-III (B and Al), group-IV (C and Ge) and group-V (N and P) impurities. Single-doping has been investigated both in spherical and faceted-like ... found that the band-gap of the codoped Si-nc is reduced with respect to the gap of the pure ones showing the possibility of an impurity-based engineering of...

Ngày tải lên: 16/03/2014, 15:15

Ngày tải lên: 22/03/2014, 11:20

... the appropriate amounts of high purity of La with 99.9%, Fe with 99.99% and Si with 99.999% in purified Ar atmosphere. The ingots were sealed into evacuated tubes and the heat treatment for ... (K) T C VNU Journal of Science, Mathematics - Physics 25 (2009) 193-197 193 Synthesis and thermoelectric properties of La(Fe 1-x Si x ) 13 compounds (x = 0.12, 0.14 and...

Ngày tải lên: 28/03/2014, 13:20

... Li a , Difa Xu b a Department of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China b Department of Science and Technology, Changsha University, ... [11,12], and hedgehog-like ZnO [13]. These structures have 1D nanoscale with 3D architectures combining properties of 3D and 1D materials, which may be used as an inte...

Ngày tải lên: 06/05/2014, 13:23

... GaSb/In 0.53 Ga 0.47 As QDs and histogram of the height of GaSb/In 0.53 Ga 0.47 As QDs. (a) The AFM image of GaSb/In 0.53 Ga 0.47 As QDs, (b) histogram of the height of GaSb/In 0.53 Ga 0.47 As QDs, and (c) the ... excitation powers and the fitting curve of the peak energies with the third root of the excitation power. Figure 4. Schematic band diagrams. (a) Bulk GaS...

Ngày tải lên: 20/06/2014, 20:20

... ion of the sputtered atoms, thus form- ing a denser film with larger grains and lower defects. Optical properties The optical transmittance spectra in the wavelength range of 200 to 1,100 nm of ... absorbers hav ing energy band gaps in the range of 1.3 to 1.5 eV compared with CdS and having a wider energy band gap compared with CdS, which trans- mits even higher energy...

Ngày tải lên: 20/06/2014, 21:20

... experiment and theroy, such as, Mn [5,6], Gd [7], and Cr [8,9]. Compared with GaN, ZnO has a lot of outs tanding superiorities, as is known to all, which has a wide band-gap (3.37 eV at RT) and a ... content of Zr, and decreases continuously as the i ncrease of the doping Zr content through the magnetic measurement at RT. Combining with the results of Raman and XPS, we s...

Ngày tải lên: 20/06/2014, 22:20