Study of the Emission Characteristics of Single-Walled CNT and Carbon Nano-Fiber Pyrograf III

2nd International Conference on Advanced Materials

Mousa, Marwan S.^1 ; Al-Akhras, M-Ali H.^2 ; Daradkeh, Samer^1

Surface Physics and Materials Technology Lab, Department of Physics, Mu'Tah University, Al-Karak, Jordan^1

Dept. of Physics, Jordan University of Science and Technology, Irbid, Jordan^2

关键词: Average diameter;    Average fiber diameters;    Emission characteristics;    Field electron emission current;    Field emission microscopy;    Fowler-Nordheim plots;    Single-walled carbon nanotube (SWCNTs);    Spatial emission;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/305/1/012009/pdf
DOI  :  10.1088/1757-899X/305/1/012009

来源: IOP

【 摘 要 】

Field emission microscopy measurements from Single-Walled Carbon Nanotubes (SWCNTs) and Carbon Nano-Fibers Pyrograf III PR-1 (CNF) were performed. Details of the materials employed in the experiments are as follows: (a) Carbon Nano-Fibers Pyrograf III PR-1 (CNF), having an average fiber diameter that is ranging between (100-200) nm with a length of (30-100) μm. (b) Single walled Carbon Nanotubes were produced by high-pressure CO over Fe particle (HiPCO: High-Pressure Carbon Monoxide process), having an average diameter ranging between (1-4) nm with a length of (1-3) μm. The experiments were performed under vacuum pressure value of (10-7mbar). The research work reported here includes the field electron emission current-voltage (I-V) characteristics and presented as Fowler-Nordheim (FN) plots and the spatial emission current distributions (electron emission images) obtained and analyzed in terms of electron source features. For both the SWCNT and the CNF a single spot pattern for the electron spatial; distributions were observed.