Báo cáo hóa học: " Synthesis and Characterization of Tin Disulfide (SnS2) Nanowires" potx

... phase of the tin disulfide (SnS 2 ). SnS was not observed because it has a strong absorption onset around 980 nm of direct band gap and a weaker absorption edge near 1100 nm of the indirect band ... 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 5.8 eV)...

Ngày tải lên: 22/06/2014, 00:20

... results and wrote the paper. JS, HP, JWK, and KK participated in the characterization of samples and carried out experiments. VM contributed to the technical discussions. All the authors have read and ... basis of a trigonal structure of space group ¯ R3m with monoclinic C2/m phase as expected. The morphologies and electrochemical properties of the samples obtained were co...

Ngày tải lên: 20/06/2014, 23:20

... 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 energy than that of ... nature of BeO shell, which is composed of many island-shape grains with random orientations to the ZnO core. Accordingly, a rather rough edge of the BeO shell is observed. Magnifie...

Ngày tải lên: 21/06/2014, 00:20

... derivative of both curves of the hysteresis loops (heating and cooling) and considering the mean value. Results and discussion Structural characterization The crystal structure of the three sets of films ... Films 1996, 281-282:239. 18. Batista C, Teixeira V, Ribeiro RM: Synthesis and Characterization of V1- xMoxO2 Thermochromic Coatings with Reduced Transition Tempera...

Ngày tải lên: 21/06/2014, 04:20

... basis of a trigonal structure of space group ¯ R3m with monoclinic C2/m phase as expected. The morphologies and electrochemical properties of the samples obtained were compared as the value of x and ... results and wrote the paper. JS, HP, JWK, and KK participated in the characterization of samples and carried out experiments. VM contributed to the technical discussions....

Ngày tải lên: 21/06/2014, 17:20

... stabilization. An in-depth study is 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 to detect ... nanowires and nanotubes. Acc Chem Re 1999, 32:435-445. (a) (b) Figure 1 Abstract We report a successful synthesis of copper oxide nanowires with an average...

Ngày tải lên: 21/06/2014, 17:20

... applications of these materials for energy and biological aspects are in progress. Conclusion A single-step process for the synthesis of good quality and large quantities of metal-encapsulated MWNB and ... Fine powders of alloys, with fresh surfaces, were obtained with several cycles of hydrogen absorption and desorption. Synthesis, Characterization and Magnetization...

Ngày tải lên: 21/06/2014, 22:20

... Shi Department of Physics, School of Sciences, China University of Mining and Technology, 221008 Xuzhou, People’s Republic of China e-mail: yifeng@semi.ac.cn C. Xue Institute of Semiconductors, College of ... nanowires, indicating that the majority of the nanowires with a radial distribution are straight, and are grown with diameters of 50–200 nm and lengths of tens o...

Ngày tải lên: 22/06/2014, 00:20

... concentration and high optical transmit- tance in the visible region of the solar spectrum. By alloying with CdO, which has a cubic structure and a narrower direct band gap of 2.2–2.5 eV, the band gap of ZnO ... is similar like ZnO NW sample and showed Raman peaks only from ZnO and do not show any CdO-related Raman peak. The assignment of Raman mode of CdO is very difficult...

Ngày tải lên: 22/06/2014, 00:20

... use of polar solvent and another hydrophilic monomer would be helpful to increase the rate of polymerization and stability of emulsion [18]. However, the details in nucleation and growth of hybrid ZrO 2 nanocomposites, ... China), and all the monomers were purified prior to use. Preparation of AAEM-Modified ZrO 2 Sol Zr(OPr n ) 4 and AAEM were used as precursors and a func...

Ngày tải lên: 22/06/2014, 01:20