Báo cáo hóa học: " Synthesis and White-Light Emission of ZnO/HfO2: Eu Nanocables" pptx

... measurements and data analysis, and drafted the manuscript. DG and DX made the conception and design of the manuscript. ZZ2 carried out the XPS measurements and data analysis. JLZ and ZZ1 participated ... 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-...

Ngày tải lên: 20/06/2014, 22:20

... 120, and 180 min, respectively Fig. 7 a The decomposition of the PL spectrum of the SiNWs treated with HF and the PL intensity varieties of the elementary bands with b H 2 O 2 concentrations and ... properties of the porous SiNWs. Figure 6a and b display the PL spectrums of the porous SiNWs with different H 2 O 2 concentrations and etching Fig. 2 SEM and TEM images of...

Ngày tải lên: 21/06/2014, 08:20

... process, corre- sponding to the one band of the v1 mode and two bands of the v3 mode (C 3v symmetry), respectively [24]. The ATR- FTIR spectra of starting materials and c-Fe 2 O 3 SNTs show similar ... crystalline character with lattice spacing of 0.252 nm and 0.295 nm, which can be indexed to the (311) and (220) planes of cubic c-Fe 2 O 3 . And the HRTEM image take from t...

Ngày tải lên: 21/06/2014, 17:20

... mmol) CoCl 2 Á6H 2 O were dissolved in the solvent composed of 80 ml of water and 40 ml of ethanol. After that, 7.3 g (24 mmol) of sodium oleate and 7 ml of oleic amine were added into the above solution ... characterizations of the particles, and the highly crystalline nature of the samples is revealed in the inset of Fig. 2b. FTIR spectra of the samples capped with o...

Ngày tải lên: 21/06/2014, 18:20

... method of functionalizing QDs is simple and can avoid complicated synthesis and characterization of the intermediate products of QDs, when reactions are performed on the QD surfaces. A number of ... prepared, and few microlitres (10–50 lL) of these solutions were added to the different sets of 3 mL solution of CdTe QDs. In a typical synthesis of CdTe–Dendrimer conjug...

Ngày tải lên: 21/06/2014, 20:20

... SEM images of Ni nanotube and nanowire arrays obtained under different conditions: (a), (c) and (e) are top views of samples 1, 2 and 3 respectively; (b), (d) and (f) are side views of the samples ... the formation of nanotubes and nanowires. Figure 4 illustrates schematic diagrams of the electrodeposition process for Ni nanotubes and nanowires. Figure 4a provides a clea...

Ngày tải lên: 21/06/2014, 20:20

... excitation wavelength and irradiation spot. For example, Hierarchical SiC NWs showed a strong and sharp emission at 445.2 nm and a broad and weak cyan emission in the range of 475–500 nm with an ... existence Fig. 4 a SEM image of bamboo carbon, b and c SEM and FE-SEM images of the synthesized b-SiC NWs, d EDS spectrum of b-SiC NWs Fig. 5 TEM and HRTEM images of b-...

Ngày tải lên: 22/06/2014, 00:20

... disappearance of the plasmon band can be due to a high steric effect of the complex (1). Photoluminescence measurements (PL) of hybrid (1) showed an emission band with two maxima, at 418 and 440 nm ... infrared typical PL of thiol stabilized Au nanoparticles [20]. A difference of the positions of PL emission peaks of hybrids (1) and (2) is likely due to the different che...

Ngày tải lên: 22/06/2014, 01:20

... Foundation of China (Grant Nos. 60778040, 10804036, 60878039), the Science and Technology Bureau of Key Program for Ministry of Education (Item No. 207025), and the Development of the Science and Technology ... surfaces. Conclusions WSe 2 nanorods of 10–50 nm in diameters and 100–400 nm in lengths were prepared successfully by solid-state reac- tion of the tungsten and s...

Ngày tải lên: 22/06/2014, 01:20

... spectra of ZnO nanofibers, HfO 2 :Eu nanotubes, and ZnO/HfO 2 :Eu nanocables annealed at 600 and 700°C, respectively. It can be seen that the emission bands of the ZnO/HfO 2 :Eu nanocables consist of ... These emission bands of the ZnO/HfO 2 :Eu nanocables originate from the combined action of the ZnO nanocores and Eu- doped HfO 2 shells. However, for the nanocable...

Ngày tải lên: 21/06/2014, 17:20