Stable Field Emission from Layered MoS2 Nanosheets in High Vacuum and Observation of 1/f Noise

作者：Kashid Ranjit V; Joag Pracheetee D; Thripuranthaka M^*; Rout Chandra S; Late Dattatray J; More Mahendra A

来源：Nanomaterials and Nanotechnology, 2015, 5: 10.

DOI：10.5772/60071

• Layered materials
• MoS2
• Electron emission
• Noise measurement
• Raman spectroscopy

Field emission and current noise of hydrothermally synthesized MoS2 nanosheets are investigated in ultra-high-vacuum and industrially suited high-vacuum conditions. The study reveals that the emission turn-on field is pressure dependent. Moreover, the MoS2 nanosheets exhibit more stable field-electron emission in high-vacuum than in ultra-high-vacuum conditions. The investigations on field-emission current fluctuations show features of 1/f-type noise in ultra-high-vacuum and high-vacuum conditions, attributed to adsorption and desorption processes. The post-field-emission results indicate the MoS2 nanosheets are a robust field emitter in high-vacuum conditions.

• 出版日期2015-4-17