Super growth of vertically-aligned carbon nanofibers and their field emission properties |
| |
| Affiliation: | 1. Soft Innovative Materials Research Center, Korea Institute of Science and Technology, Eunha-ri San 101, Bongdong-eup, Wanju-gun, Jeollabuk-do 565-905, South Korea;2. School of Electrical Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea;3. Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), Daejeon 305-350, South Korea;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;2. Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Republic of Korea;3. Department of Chemistry, Inha University, Incheon 402-751, Republic of Korea;1. Department of Organic Materials & Fiber Engineering, Chonbuk National University, Jeonju 561-756, South Korea;2. Department of Chemistry, Inha University,100 Inharo, Incheon 402-751, South Korea;3. Department of BIN fusion technology, Chonbuk National University, Jeonju 561-756, South Korea;1. Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130012, Jilin, China;2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | We demonstrate a very efficient synthesis of vertically-aligned ultra-long carbon nanofibers (CNFs) with sharp tip ends using thermal chemical vapor deposition. Millimeter-scale CNFs with a diameter of less than 50 nm are readily grown on palladium thin film deposited Al2O3 substrate, which activate the conical stacking of graphitic platelets. The field emission performance of the as-grown CNFs is better than that of previous CNFs due to their extremely high aspect ratio and sharp tip angle. The CNF array gives the turn-on electric field of 0.9 V/μm, the maximum emission current density of 6.3 mA/cm2 at 2 V/μm, and the field enhancement factor of 2585. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
