Abstract
The cores of carbon nanotubes (CNTs) are partially filled by Fe nanowires during synthesis by chemical vapor deposition from an acetylene–ferrocene mixture. A Fe-filled CNT turf is produced with a height exceeding 100 μm and a Fe-filling ratio of 33%–48%. The diameters of the Fe nanowires inside the CNTs range from 10 to 20 nm. With the Fe-filling of the CNT core rising to 48.1%, the compressive modulus of the turf increases from 4.9 to 71.8 MPa and the hardness from 0.534 to 2.044 MPa.
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