Chiral single-wall gold nanotubes

Details Chiral single-wall gold nanotubes Chiral single-wall gold nanotubes

2004-10-14

arxiv.org/abs/cond-mat/0410363v2

Physical Review Letters 93, 196807 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Figures provided in eps format

Scientific paper

10.1103/PhysRevLett.93.196807

Based on first-principles calculations we show that gold atoms can form both free-standing and tip-suspended chiral single-wall nanotubes composed of helical atomic strands. Free-standing, infinite (5,5) tube is found to be energetically the most favorable. While energetically less favorable, the experimentally observed (5,3) tube stretching between two tips corresponds to a local minimum in the string tension. Similarly, the (4,3) tube is predicted as a favorable structure yet to be observed experimentally. Analysis of band structure, charge density, and quantum ballistic conductance suggests that the current on these wires is less chiral than expected, and there is no direct correlation between the numbers of conduction channels and helical strands.

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