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Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering
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Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering
![KASHMIR SAPPHIRE AND GOLD RING, HEMMERLE. Yellow gold 750 and platinum 800 with iridium. Casual-elegant bicolour band ring, the top set with 1 fine, antique-oval sapphire of ca. 2.89 ct, probably unheated, KASHMIR SAPPHIRE AND GOLD RING, HEMMERLE. Yellow gold 750 and platinum 800 with iridium. Casual-elegant bicolour band ring, the top set with 1 fine, antique-oval sapphire of ca. 2.89 ct, probably unheated,](https://www.kollerauktionen.ch/CatCache/catcache.2/pictures/114102/114102_m_1.jpg)