Journal
SOLID STATE COMMUNICATIONS
Volume 149, Issue 39-40, Pages 1619-1622Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2009.06.037
Keywords
Iron-filled carbon nanotubes; Excessive ferrocene; Floating catalyst chemical vapor deposition; Magnetic property
Categories
Funding
- Academic Human Resources Development in Institutions of Higher Learning
- Science & Technology Activity for Chinese Homecoming Fellow Abroad
- Beijing Key Lab for Sensor [KM200810772009]
- Beijing Municipal Commission of Education [PXM2008_014224_067420]
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Iron-filled carbon nanotubes (CNTs) were synthesized using a floating catalyst chemical vapor deposition method with a great excess of ferrocene (more than 30 mg/min of vaporization rate) at 800 degrees C. The amount of ferrocene is more than that in previous reports. The ferrocene was employed as both catalyst precursor and an iron source. Our observations indicate that the CNTs were more than 10 micrometer in length, with an outer diameter of 20-100 nm and inner diameter of 10-30 nm. The inner cavity of the CNTs was partial filled with iron nanowires. Magnetic property measurements reveal that the iron-filled CNTs exhibit an average coercivity of about 257.05 G. (C) 2009 Elsevier Ltd. All rights reserved.
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