A carpet structure composed of high purity cup-stacked carbon nanotubes (CSCNTs) was synthesized by a catalytic chemical vapor deposition method. In a 15-min growth time, the CSCNT carpet with a height up to similar to 300 mu m and carbon purity above 99.9 mass% was prepared. Transmission electron microscopy observations indicated that the CSCNTs with diameters ranging from 80 mu to 230 nm consist of truncated conical graphene layers. Based on the experimental results, a possible "base growth" mechanism was proposed for the CSCNTs. The CSCNT carpet is highly flexible and superhydrophobic, showing a contact angle of similar to 155 degrees. It can be easily harvested from the original growth substrate and be transferred to target substrates. It may therefore find applications as a water-proof and self-cleaning coating layer.
; hou peng-xiang
; liu chang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.
; liu, c (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china.