Volume 90, Number 3, May 2010
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||10 May 2010|
Nanowire formation by gold nano-fragment coalescence on quantized vortices in He II
Department of Physics, University of Fribourg - Chemin du Musée 3, 1700 Fribourg, Switzerland
2 Department of Geoscience, University of Fribourg - Chemin du Musée 6, 1700 Fribourg, Switzerland
3 Institute of Problems of Chemical Physics RAS - Acad. Semenov av. 1, 142432 Chernogolovka, Russia
Corresponding author: firstname.lastname@example.org
Accepted: 27 April 2010
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 vortices. Our observations suggest new ways to visualize the structure of quantized vortex bundles and a new approach for producing centimeter-long metal nanowires.
PACS: 47.37.+q – Hydrodynamic aspects of superfluidity; quantum fluids / 67.25.dk – 4He: Vortices and turbulence / 61.46.Km – Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires)
© EPLA, 2010
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