Anomalous Buckling of Charged Rods

Details Anomalous Buckling of Charged Rods Anomalous Buckling of Charged Rods

2003-08-20

arxiv.org/abs/cond-mat/0308389v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

Unscreened electrostatic interactions exert a profound effect on the onset of the buckling instability of a charged rod. When this interaction is unscreened, the threshold value of the compressional force needed to induce buckling is independent of rod length for sufficiently long rods. In the case of rods of intermediate length, the critical buckling force crosses over from the classic inverse-square length dependence to asymptotic length-independent form with increasing rod length. It is suggested that this effect might lead to the possibility of the ``electromechanical'' stiffening of nanotubes, which would allow relatively long segments of them to be used as atomic force probes.

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