"Self-Assembled, Deterministic Carbon Nanotube Wiring Networks" Michael R. Diehl, Sophia N. Yaliraki, Robert A. Beckman, Mauricio Barahona, James R. Heath Angewandte Chemie International Edition 41 (2), 353 - 356 (18 Jan 2002).

Description:

Crossbars of self-assembled single walled nanotubes form a scaffold circuit for molecular electronics.  These crossbars can be assembled with only minimal lithography to form electrodes which allow electrical alignment of the nanotubes out of solution.  The junctions between these nanotube crosses can function as molecular logic or memory gates under proper conditions.

Scanning electron micrographs of SWNT crossbars with varying pitch. Scale bars are 500 nm for a) and b), and 1 um for c). The diameter of the ropes is not well measured with this technique, but can be measured with force microscopy. The shortest (500 nm) wires are characterized by diameters of 1-2 nm, while the longest (20 m) wires possess diameters ranging from 10 to 15 nm. SWNT rope lengths [m]: a) 3.7±0.3 & 1.2±0.33; b) 2.8±0.53; c) 3.8±1.2.
 

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