MoS[sub 2] nanoflowers and their field-emission properties

Li, Y. B.; Bando, Y.; Golberg, D.
March 2003
Applied Physics Letters;3/24/2003, Vol. 82 Issue 12, p1962
Academic Journal
Elegant three-dimensional MoS[sub 2] nanoflowers were uniformly formed via heating a MoO[sub 2] thin film in a vapor sulfur atmosphere. Tens to hundreds of petals were self-assembled within a single nanoflower. Each petal, 100-300 nm wide and only several nanometers thick, exhibited a hexagonal structure. The number of petal layers gradually decreased towards the edges, resulting in uniquely thin edges, typically less than 3 nm. The MoS[sub 2] nanoflowers appeared to be excellent field emitters displaying a current density of 0.01 and 10 mA/cm² at macroscopic fields of 4.5-5.5 and 7.6-8.6 V/µm, respectively; the electron field emission was consistent with the Fowler-Nordheim theory.


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