Concentration switchable mirror properties

Recently, R nanoparticle layers [e.g., Y Bour et al. (2001), Gd Aruna et al. (2004)] have also been utilized as the active layer in the switchable mirrors. In these New generation switchable mirrors , in addition to the size dependent switchable properties, utilization of nanoparticle layers showed that it was possible to tune the band gap of the trihydride state by varying the nanoparticle size (Aruna et al., 2004) and sense very low concentrations of hydrogen (Bour et al., 2001). In a recent study, the use of Pd nanoparticle over layer to enhance the hydrogen induced switching properties of the Gd polycrystalline films has been reported (Aruna et al., 2005c). The studies are discussed in detail in section 4. 

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