Documents / Document
No summary written yet.
Synopsis: Analysis of a Metallic Specimen4 Finally, based on the postulated hypothetical uses of bismuth, the dielectric properties necessary for bismuth to function as a waveguide would have been disrupted in this material because the bismuth in the specimen is co- located and mixed with lead (Figures 3 and 5). Based on these findings ORNL determined that this material is highly unlikely to have ever functioned as a bismuth-based terahertz waveguide. 5 μm (a) 5 nm-1 (b) 5 μm 5 nm-1 γ =3.0 Bi2O3 Bi (c) (d) Figure 4: (a) TEM micrograph of a single-crystalline region from the bulk of the sample; structural defects are visible at this level of resolution (this figure is showing an area that represents just 2 to 3 pixels of the area shown in Figure 3). The vertical lines at the bottom are a focused ion beam preparation artifact. (b) Selected area electron diffraction pattern (SAEDP) from the region in (a), indexed to the standard Mg structure. (c) A low-magnification montage TEM micrograph of an area showing a dense bismuth-rich layer (dark central band). (d) A SAEDP from a bismuth-rich band. The electron diffraction pattern (with image processing γ=3.0) from the bismuth-rich region is shown in the white rings. Both bismuth (Bi, yellow) and Bi2O3 (red) calculated ring patterns are shown for comparison; Bi is a slightly better match. The diffraction indicates that the bismuth layer is nanocrystalline and highly defective.
Not linked to a story yet.
Document, cited by the archive. The PDF is mirrored here; the original link is above. 10 pages are in the text index: search them above, or from the library's search.