Báo cáo hóa học: " Synthesis and Characterization of Monodispersed Copper Colloids in Polar Solvents" pdf

... the amount of reducing agent and reaction mechanism were discussed. The roles of polyvinyl pyrrolidone (PVP) and ascorbic acid were investigated. Experimental Preparation of Copper Colloids Copper ... impure, and it was the mixture of face- centered cubic (fcc) phase of copper (JCPDS 04-836) and cubic phase of Cu 2 O (JCPDS 05-0667), and copper was the main pro...

Ngày tải lên: 22/06/2014, 01:20

... ly and then fired at 900°C for 12 h for crystallization. The resultant powders were obtained after quenching the fired powders using two copper plates in air and s ubsequent grinding. The final ... 7:60 http://www.nanoscalereslett.com/content/7/1/60 Page 9 of 9 indicating long-range ordering are distinctly visible and sharper in pure Li 2 MnO 3 (x = 0), when compared with the ot...

Ngày tải lên: 20/06/2014, 23:20

... originates from the t ype I band al ignment between ZnO and BeO, in which the valence band maximum of BeO is of lower energy than that of ZnO, while the conduction band minimum of BeO is of higher ... sup- pressed in the core/shell sample, indicating the BeO cap- ping process significantly reduces the surface states of ZnO core. The drastic increase in the NBE emission int...

Ngày tải lên: 21/06/2014, 00:20

... resistivity of the films [26]. The doping of VO 2 increased the electron density in the film, which caused the Fermi energy level shift toward the conduction band. Since intrinsic VO 2 thin film is of n-type, ... then estimated by determining the first derivative of both curves of the hysteresis loops (heating and cooling) and considering the mean value. Results and discussi...

Ngày tải lên: 21/06/2014, 04:20

... ly and then fired at 900°C for 12 h for crystallization. The resultant powders were obtained after quenching the fired powders using two copper plates in air and s ubsequent grinding. The final ... 7:60 http://www.nanoscalereslett.com/content/7/1/60 Page 5 of 9 indicating long-range ordering are distinctly visible and sharper in pure Li 2 MnO 3 (x = 0), when compared with the ot...

Ngày tải lên: 21/06/2014, 17:20

... of sulfur detected in XPS indicates the presence of TG on the surface of the CuO nanowires synthesized. Conclusions Using a simple and inexpensive wet chemical method, the synthesis of copper ... required, and further experiments are underway to understand and investigate the exact mechanism and the role of TG in the synthesis of CuO nanowires. In order...

Ngày tải lên: 21/06/2014, 17:20

... compared to that of Ni-encapsulated MWNT due to the discontinuous filling of Ni during the growth process. Acknowledgements We thank IITM and DST, Govt. of India, for the support of this work. References 1. ... apparatus. Fine powders of alloys, with fresh surfaces, were obtained with several cycles of hydrogen absorption and desorption. Synthesis, Characterization and Mag...

Ngày tải lên: 21/06/2014, 22:20

... sputtering a Co target (99.99%) for 10 s with a JCK-500A RFMS. The thickness of Co layer was L. Qin Á Y. Duan (&) Á L. Shi Department of Physics, School of Sciences, China University of Mining and ... Republic of China e-mail: yifeng@semi.ac.cn C. Xue Institute of Semiconductors, College of Physics and Electronics, Shandong Normal University, 250014 Jinan, People’s Repub...

Ngày tải lên: 22/06/2014, 00:20

... electrodeposited in the pore of the nano- channels of AAO template under constant voltage, using an electrolyte containing SnSO 4 and distilled water. After washing with distilled water and air drying, the ... between those sub-bands. Those bands of SnS 2 nanocrystallites may be associated with the presence of defect either interface or interior. Our band gap energies (4.4 and...

Ngày tải lên: 22/06/2014, 00:20

... the Korea Science and Engineering Foundation, grant no. RTI04-01-04 from the Regional Technology Innovation Program of the Ministry of Commerce, Industry and Energy (MOCIE) and the Korean Research ... Systematic Fig. 5 a TEM image of the ZnO NW–CdO composite structure showing CdO deposition only on the tip of the ZnO nanowire and their corresponding EDX elemental mapping of...

Ngày tải lên: 22/06/2014, 00:20