Field Emission Characterization of MoS<sub>2</sub> Nanoflowers

oleh: Filippo Giubileo, Alessandro Grillo, Maurizio Passacantando, Francesca Urban, Laura Iemmo, Giuseppe Luongo, Aniello Pelella, Melanie Loveridge, Luca Lozzi, Antonio Di Bartolomeo

Format: Article
Diterbitkan: MDPI AG 2019-05-01

Deskripsi

Nanostructured materials have wide potential applicability as field emitters due to their high aspect ratio. We hydrothermally synthesized MoS<sub>2</sub> nanoflowers on copper foil and characterized their field emission properties, by applying a tip-anode configuration in which a tungsten tip with curvature radius down to 30&#8722;100 nm has been used as the anode to measure local properties from small areas down to 1&#8722;100 &#181;m<sup>2</sup>. We demonstrate that MoS<sub>2</sub> nanoflowers can be competitive with other well-established field emitters. Indeed, we show that a stable field emission current can be measured with a turn-on field as low as 12 V/&#956;m and a field enhancement factor up to 880 at 0.6 &#956;m cathode&#8722;anode separation distance.