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Nanowire formation by gold nano-fragment coalescence on quantized vortices in He II

Moroshkin, Peter ; Lebedev, Victor ; Grobéty, Bernard ; Neururer, Christoph ; Gordon, E. B. ; Weis, Antoine

In: Europhysics Letters, 2010, vol. 90, no. 3, p. 34002

We demonstrate that laser ablation of a gold target immersed in superfluid and normal fluid helium leads to the formation of elongated gold nano-fragments. In the superfluid phase these nano-fragments aggregate into filaments with extremely large aspect ratios displaying metallic electric conductivity. We attribute this unusual structure to the coalescence of gold particles trapped on quantized...