TITLE:
Synthesis and Field Emission Properties of Carbon Nanowire-Single Walled Carbon Nanotube Networks Hybrid Films
AUTHORS:
Lijun Wang, Linghong Liu, Xiaoping Wang, Ying Yu, Junwei Wen, Jian Li
KEYWORDS:
Carbon Nanowire, Singlewalled Carbon Nanotube, Chemical Vapour Deposition, Field Emission
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.3 No.3C,
October
22,
2015
ABSTRACT: Carbon nanowire (CNW)-singlewalled carbon
nanotube (SWCNT) networks hybrid films with a large area (~400 mm2) are grown
on molybdenum (Mo) layers by microwave plasma chemical vapour deposition
system. The Mo layers, which were deposited on Al2O3 ceramic
substrates through electron beam evaporation deposition, were pretreated by
a laser-grooving (LG) technology. Furthermore, the surface morphology,
micro-structure and field emission properties of these samples are
characterized by scanning electron microscope, Raman spectra, and field emission
I - V measurements. ACNW-SWCNT networks hybrid film was formed in the surface of Mo layer, but the laser etched area (linear pits array
area) the distribution of the CNW-SWCNT networks density is lower than the
un-etched area CNW-SWCNT networks distribution density. The
diameter of the CNWs and SWCNTs, respectively in the 8 - 15 nm and 0.9 - 1.5 nm
range, and the length of CNW-SWCNTs ranges from 1 μm to 4 μm. The growth
mechanisms of the films were discussed. Effects of LG pretreatment on surface
morphologies and microstructure of the hybrid films were investigated. The
field electron emission experimental results shown that the ture on field as low
as 1.6 V/μm, and a current density of 0.15 mA/cm2 at an electric field of 4.3 V/μm
was obtained.