Nanomaterials for Nanoscience and Nanotechnology part 8 ppt
Nanomaterials for Nanoscience and Nanotechnology part 8 ppt
... overlapping discs. The numeral 2 stands for two- beam interference, 3 for three-beam interference, 4 for four-beam interference, and the letter D indi- cates detector positions for dark-field lattice imag- ing. The ... very successful for characterizing small particles and supported metal catalysts with sub-nanometer or atomic resolution and high compositional sensitivity [19±...
Ngày tải lên: 12/08/2014, 02:23
Nanomaterials for Nanoscience and Nanotechnology part 1 pptx
... levels, bands are formed. An energy gap between the con- duction band and the valence band would be formed, which is a key factor in deter- Nanomaterials for Nanoscience and Nanotechnology 5 Part ... J.E.G.J. Wijnhoven and W.L. Vos, Science, 19 98, 281 , 80 2. [51] B.T. Holland, C.F. Blanford and A. Stein, Science, 19 98, 281 , 5 38. [52] C.T. Kresge, M.E. Leonowioz, W.J....
Ngày tải lên: 12/08/2014, 02:23
Nanomaterials for Nanoscience and Nanotechnology part 2 pps
... anomalous peak heights and widths [8] . Figure 2-1 shows the diffraction patterns for three sizes of face-centered- cubic (fcc) particles, spanning a diameter range of 1.6±2 .8 nm, and containing from 147 ... of 2 nm and a half width of 1 nm [ 28] . Powder X-ray diffraction studies were performed using 8. 040 keV photons. As nanoparticles diffraction peaks are rather large (FWHM » 5...
Ngày tải lên: 12/08/2014, 02:23
Nanomaterials for Nanoscience and Nanotechnology part 3 potx
... G. McKale, J. Amer. Chem. Soc. 1 988 , 110, 3763. [42] F. W. Lytle, D. E. Sayers and E. A. Stern, Phys. B 1 989 , 1 58, 701. [43] R. C. Elder et al., ACS Sym. Ser. 1 983 , 209. [44] F. Sette, T. Hashizume, ... F. Comin, A. A. MacDowell and P. H. Citrin, Phys. Rev. Lett. 1 988 , 61, 1 384 . [45] A. Filipponi, A. Di Cicco and C. R. Natoli, Phys. Rev. B 1995, 52, 15122; A. Filipponi and...
Ngày tải lên: 12/08/2014, 02:23
Nanomaterials for Nanoscience and Nanotechnology part 4 docx
... The surface of the particle may have some steps and ledges particularly at the regions near the corners of the cube. To precisely image the defects and facets on the cubic parti- cles, a particle oriented ... images for a decahedral Au particle at various orientations and at focuses of (A) Áf = 42 nm and (B) Áf = 70 nm. The Fourier transform of the image is also displayed (Courtsey...
Ngày tải lên: 12/08/2014, 02:23
Nanomaterials for Nanoscience and Nanotechnology part 6 pdf
... from Co 3 O 4 and CoO standard specimens and the synthesized nanocrystals. The relative intensity of the Co-L 2 to Co-L 3 for the nanocrystals is almost identical to that for CoO standard, while ... can be emitted from the valence band. The difference between Figures 3-23b and 3-23c is the emission of photon in the former and the Auger electron in the latter, and the two process...
Ngày tải lên: 12/08/2014, 02:23
Nanomaterials for Nanoscience and Nanotechnology part 9 pot
... of Nanoparticles 103 Figure 4-16. Intensity and radius data from particles in HAADF and SE images of silver nanoparticles plotted as (intensity) 1/3 against particle radius R. The HAADF and SE ... structure, and composition of metal parti- cles is of primary importance in understanding the synthesis-structure-activity rela- tionships and is essential for a qualitative and quanti...
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Nanomaterials for Nanoscience and Nanotechnology part 10 pps
... (Fig. 4- 28) . If R/L < 1, the brightness of a particle increases with the size of the particle and the image intensity has a maximum at the center of the particle. If R/L > 1, the parti- cle ... with the size of the particle and the highest image inten- sity is approximately at a distance d =(R ± L) from the center of the particle. For very large particles, the particle contrast...
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Nanomaterials for Nanoscience and Nanotechnology part 11 pdf
... 1 980 , D13, 461. [ 98] M. Rosler, W. Brauer, Phys. Status Solidi 1 988 , B1 48, 213. [99] J. Schou, Scanning Microscopy 1 988 , 2, 607. [100] P. Kruit, J. A. Venables, Ultramicroscopy 1 988 , 25, 183 . [101] ... 1 985 , 18, 5335. [147] R. H. Richie, A. Howie, Philos. Mag. 1 988 , A 58, 753. [1 48] Z. L. Wang, J. M. Cowley, Ultramicroscopy 1 987 , 21, 77, 335. [149] M. G. Walls, A. Howie, Ul...
Ngày tải lên: 12/08/2014, 02:23
Tài liệu A resource for reading and words part 8 pptx
... it, and is physically, mentally and sometimes morally affected. At first-he loses his appetite and feels sick, he grows irritable, disregards his responsibilities, and becomes unpunctual and ... with a suitable form of the words defined above. 1. Her husband became when he was not working. 2. A salesman who threatened food at Marks and Spencer stores unless his demands for...
Ngày tải lên: 20/01/2014, 16:20