ZHANG Yan-li, ZHANG Li-li, HOU Peng-xiang, JIANG Hua, LIU Chang, . Synthesis and field emission property of carbon nanotubes with sharp tips. New Carbon Mater., 2011, 26(01): 52-56. doi: 10.1016/S1872-5805(11)60065-6
Citation:
ZHANG Yan-li, ZHANG Li-li, HOU Peng-xiang, JIANG Hua, LIU Chang, . Synthesis and field emission property of carbon nanotubes with sharp tips. New Carbon Mater., 2011, 26(01): 52-56. doi: 10.1016/S1872-5805(11)60065-6
ZHANG Yan-li, ZHANG Li-li, HOU Peng-xiang, JIANG Hua, LIU Chang, . Synthesis and field emission property of carbon nanotubes with sharp tips. New Carbon Mater., 2011, 26(01): 52-56. doi: 10.1016/S1872-5805(11)60065-6
Citation:
ZHANG Yan-li, ZHANG Li-li, HOU Peng-xiang, JIANG Hua, LIU Chang, . Synthesis and field emission property of carbon nanotubes with sharp tips. New Carbon Mater., 2011, 26(01): 52-56. doi: 10.1016/S1872-5805(11)60065-6
1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China|
2.
Department of Applied Physics and Center for New Materials, Aalto University, P.O. Box 15100, Puumiehenkuja 2, FIN-02150 Espoo, Finland
Funds:
National Natural Science Foundation of China (50921004, 50872137), National Basic Research Program of China (2011CB932601), and International Scientific Joint Research Program (2008DFA51400).
Carbon nanotubes (CNTs) with sharp tips were synthesized by a hydrogen arc discharge method. Three unusual morphologies, i.e., a cone-shaped tip, a suddenly-shrinking tip, and a pencil point-like tip were observed. These novel tip structures are considered to be related to the addition of a small amount of silicon powder in the raw material, which may introduce structural defects in the CNTs. The field emission property of the sharp-tip CNTs was investigated, and a low threshold electric field of 3.75V/m, a high field emission current density of ~1.6×105A/cm2, and a good emission stability were demonstrated. The superior field emission performance of the CNTs can be attributed to their good crystallinity and unique tip structures.