Cathodoluminescence image

Spatial information about a system can be obtained by analyzing the spatial distribution of PL intensity. Fluorescent tracers may be used to image chemical uptake in biological systems. Luminescence profiles have proven useftil in the semiconductor industry for mapping impurity distributions, dislocadons, or structural homogeneity in substrate wafers or epilayers. Similar spatial infbrmadon over small regions is obtained by cathodoluminescence imaging. 

VII. Cathodoluminescence Imaging for Elucidation of Electronic Structures of Catalysts... 

Cathodoluminescence images from the GB deposit show primary quartz of Type II veins (blue CL), with visible growth zoning in CL. These are crosscut by later hydrothermal Type III vein quartz that exhibits growth textures in short-lived blue and red CL colors. Both Type-ll and -III veins are weakly to moderately brecciated and are overprinted by later fluids that modified the primary quartz to red and/or yellow hydrothermal quartz characteristic of higher temperature and likely reflects... 

Boggs, S. Krinsley, D. 2006. Application of cathodoluminescence imaging to the study of sedimentary rocks, Schweizerbartsche Verlagsbuchhandlung, 165p. 

Figure 13 Quartz on silt grains in Wilcox Formation shale, Eocene, Texas Gulf Coast (a) secondary electron image and (b) panchromatic cathodoluminescence image.

Milliken K. L. (1994b) The widespread occurrence of healed microfractures in siliciclastic rocks evidence from scanned cathodoluminescence imaging. In Rock Mechanics, Models and Measurements, Challenges from Industry, Proceedings of the 1st North American Rock Mechanics Symposium (eds. P. P. Nelson and S. E. Laubach). Balkema, Rotterdam, 1155pp. 

MiUiken K. L. and Laubach S. E. (2000) Brittle deformation in sandstone diagenesis as revealed by scanned cathodoluminescence imaging with application to characterization of fractured reservoirs. In Cathodoluminescence in Geosciences (eds. M. Pagel, V. Barbin, P. Blanc, and D. Ohnenstetter). Springer, Berlin, pp. 225-243. 

Perrette et al. (2000) measured concentration by ESR spectroscopy and found that the Mn varied with other precipitation indicators such as color banding. ESR spectroscopy is an intrinsically low-resolution measurement. Cathodoluminescence imaging should reveal Mn banding. Cathodoluminescence imaging is a common technique in sedimentary petrography but does not seem to have been applied to speleothems. 

Figure 7.19 Cathodoluminescence images of an as-sprayed hydroxyapatite coating cross-section (a) and CL images of coatings immersed in Hank s Balance Salt Solution (HBSS) for 7 days (b) and 28days (c).

Figure 7.21 Cathodoluminescence images of Mn2+-doped hydroxyapatite powder (top), an as-sprayed coating (a), and coatings incubated in r-SBF (SBF-H, Table 7.8) for 1 day (b),...

R. J. Graham, T. D. Moustakas, and M. M. Disko, Cathodoluminescence imaging of defects and impurities in diamond films grown by chemical vapor deposition,... 

However, in cases where spatial information is crucial, zircons (or other minerals) can also be analyzed in polished slab or thin sections of rock [21]. Separated zircons are mounted in epoxy and polished to expose the parts that will be targeted for dating. The targets for LA-ICP-MS analysis are generally selected based on cathodoluminescence imaging [22] (Figure 9.3). Prior to ablation, the sample is generally cleaned with nitric acid to remove any surface contamination, most notably Pb. 

FIGURE 14 Cathodoluminescence image of defects in a gallium arsenide wafer. 

Figure 25. One-to-one correspondence between (a) dislocation etch-pit distribution, (b) cathodoluminescence images and (c) electron-beam-induced conductivity images of the same region of a GaP layer (104).

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