Dot-Like Formation of Metal Nanocrystals from Exfoliated Ruthenate Nanosheets

抄録

We studied the metallization behavior of molecularly thin Ru_0.95O₂^0.2− nanosheets obtained from complete delamination of a layered ruthenate, K_0.2RuO_2.1. Heating at 200°C under a mixture of N₂ and H₂ transformed multilayers of the nanosheets into hcp-Ru metals. These metals have unique morphology reflecting the multilayer structure of the precursors. Interestingly, a monolayer state of the Ru_0.95O₂^0.2− nanosheets triggered a dot-like formation of Ru metal nanocrystals about 0.6 nm thick and several tens of nanometers wide, which represent a new family of 2D anisotropic metal nanomaterials. [DOI: 10.1380/ejssnt.2014.97]