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Schematic diagram of the directed assembly process. (a) Schematic illustrating the rolling of a drop of the SWNTs∕1,2-dichlorobenzene solution on a two-component surface, COOH-SAM (red) and CH3-SAM (green). (b) The SWNTs (blue) are selectively transported to the COOH-SAM and pinned at its boundary with the ODT SAM. Upon drying, the SWNT bends to precisely follow the molecular path of the patterned COOH-SAM.
