DocumentCode :
2043893
Title :
Preparation and Field Emission Properties of Mesoporous Silica Nanotube-ecomposites Materials
Author :
Yong, Cao ; Wei, Lei ; Xiaobing, Zhang ; Baoping, Wang
Author_Institution :
Dept. of Electron. Eng., Southeast Univ., Nanjing
fYear :
2006
fDate :
38899
Firstpage :
337
Lastpage :
338
Abstract :
Carbon nanotube/mesoporous silica composites with controlled diameter and bundle size have been synthesized by using highly selective catalytic method. The composites were characterized by SEM and TEM. Results suggest that the bundle size, rather than the nanotube diameter or differences in work function, is more important in determining the field emission properties of SWNT/mesoporous silica composites. The possibility of tailoring the electrical properties of SWNT emitters by adjusting the synthesis parameters has been demonstrated. In addition, the present results show that the as-produced SWNT/mesoporous silica composites have similar or better field emission properties than the purified nanotube samples, even though the concentration of nanotubes on the emitting surface of the as-produced was much lower than that in the pure SWNT sample. The good field emission efficiency of the as-produced material combined with the convenience of eliminating any purification process make this material an attractive field emitter. Thus we can anticipate that the method presented in this work offers a solution to forming the bi-component structure of nanomaterials
Keywords :
carbon nanotubes; catalysis; field emission; mesoporous materials; nanocomposites; scanning electron microscopy; silicon compounds; transmission electron microscopy; work function; C-SiO2; SEM; SWNT field emitters; TEM; bundle size; carbon nanotube-mesoporous silica composites; field emission properties; highly selective catalytic method; nanotube diameter; work function; Carbon nanotubes; Fabrication; Mesoporous materials; Nanocomposites; Nanostructured materials; Nanostructures; Organic materials; Silicon compounds; Size control; Temperature distribution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International
Conference_Location :
Guilin
Print_ISBN :
1-4244-0401-0
Type :
conf
DOI :
10.1109/IVNC.2006.335206
Filename :
4134598
Link To Document :
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