Experimental and theoretical developments in small metal-particle catalysis using electron microscopy

7 Experimental and theoretical developments in small metal-particle catalysis using electron microscopy 

As described earlier, many EM techniques including in situ ETEM, STEM, HRTEM, image analysis and EEELS are being pushed to their limits by researchers to study surfaces and ultrafine particles (or clusters) which are thought to be active species. Eor catalysis, metal particles are, in general, supported on ceramic substrates. Detection of supported particles less than 10 A (1 nm) in size is possible by HRTEM however, caution must be exercised in interpreting the size and surface structure of the metal particles since the surface structure is obscured by the support contrast, as demonstrated by calculations. 

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