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.
Highlights
Since carbon nanotubes (CNTs) were discovered [1], various nano-carbon field electron emission (FE) materials have been extensively studied in recent years for their potential applications such as flat panel displays, high temperature microelectronics and intense electron sources for microwave generation [2]-[10]
We report the fabrication of a series of larger areas (400 mm2) Carbon nanowire (CNW)-single walled CNT (SWCNT) networks hybrid films on Mo coated Al2O3 ceramic substrate by using microwave plasma-assisted chemical vapor deposition (MPCVD) technique, and the Mo coated layers was pretreated by a laser-grooving (LG) technique
For the CNW-singlewalled carbon nanotube (SWCNT) networks hybrid film sample, the peak position of the D-band is around 1316 cm−1, which is assigned as A1gD mode, associated with vibrations at defects such as vacancies, grain boundaries, substitution hetero-atoms and impurities [30] [31]
Summary
Since carbon nanotubes (CNTs) were discovered [1], various nano-carbon field electron emission (FE) materials have been extensively studied in recent years for their potential applications such as flat panel displays, high temperature microelectronics and intense electron sources for microwave generation [2]-[10]. (2015) Synthesis and Field Emission Properties of Carbon Nanowire-Single Walled Carbon Nanotube Networks Hybrid Films. Carbon nanowire (CNW) as a new type of carbon nanomaterials has aroused the attention of some scholars, and it has been investigated in the synthetic technology and material properties by some researchers [23]-[27]. We report the fabrication of a series of larger areas (400 mm2) CNW-single walled CNT (SWCNT) networks hybrid films on Mo coated Al2O3 ceramic substrate by using microwave plasma-assisted chemical vapor deposition (MPCVD) technique, and the Mo coated layers was pretreated by a laser-grooving (LG) technique. FE properties of CNW-SWCNT networks hybrid films were further investigated, and a current density ~0.15 mA/cm at an electric field of 4.3 V/μm and a threshold electric field of
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
