Figure 6: Pulling out the inner tube from a DWCNT.

(a,b) Approaching a probe to a DWCNT and then contacting it. Scale bar, 100 μm. (c,d) Stretching the DWCNT and then pulling out its inner shell. Scale bar, 200 μm. (e) A 3.43-mm-long singlewalled CNT being pulled out from the DWCNT. Scale bar, 20 μm; 2 nm (lower inset); 2 nm (upper inset).