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Figure 1 | Nanoscale Research Letters

Figure 1

From: Single-step electrochemical functionalization of double-walled carbon nanotube (DWCNT) membranes and the demonstration of ionic rectification

Figure 1

TEM and SEM images of DWCNT and schematic diagram of functionalized anionic dye. (A) TEM image of DWCNTs (purchased from Sigma-Aldrich). (B) SEM image of as-made DWCNT membrane in the cross-sectional view. (C) Schematic diagram of functionalized anionic dye on the CNT tip playing as gatekeeper (gray, C; red, O; blue, N; yellow, S).

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