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Prefabricated nano-scale structures in which gold electrodes are separated by an insulating core permit self-assembly of a single string "molecular necklace" around its circumference; these devices require no further invasive metal deposition following molecular insertion and exhibit symmetrical current-voltage (I-V) curves that mimic those of self-assembled films on planar substrates.
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Ashwell et al. (2007) studied this question.
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