Top-Down Processing by Hard X-Rays

5 mg (red line), and Omg (blue line). The unexposed sample without fullerene (green line) is also shown as a reference, (b) FTIR 

The possibihty of obtaining nanopartides upon exposure to hard X-rays is not restricted to metallic nanopartides, in fact oxide nanopartides within a mesopo-rous ordered matrix have been also obtained. One example is ceriimi oxide nanopartides within a titania mesoporous ordered film to produce ceria NPs, the titania mesopores have been impregnated with a ceria precursor solution and then exposed to hard X-rays. Crystalline cerium oxide NPs with an average size of 4 nm have been grown within the mesopores, and different patterns with spatial control of the nanoparticle growth on the micrometer scale have been obtained [121]. 

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