A polycrystalline metallic molybdenum nanotips: Synthesis, electrical conductivity and field emission properties

Polycrystalline molybdenum nanotips can be grown on stainless steel substrates by simple thermal vapor deposition. Individual nanotip has very good conductivity of typical average value of about 4.99×10
⁴
Ω
^-1
cm
^-1
; ie, only an order of magnitude less than the value of bulk Mo. The field emission (FE) measurements exhibit good performance, i.e, turn-on field of ~1.6 MV/m and threshold field of ~3.1 MV/m, current density of ~120 mA/cm
²
were recorded, and the current fluctuation of ±3.56% was observed when the current density is 50 mA/cm
²
.