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DRIFT MECHANISM OF THE METAL NANOWIRES FORMATION IN LIQUID HELIUM

Abstract

It was shown theoretically that the mechanism of the rapid coagulation of metal nanospheres into a nanowire in a quantum vortex proposed by E.B. Gordon et al. (Low Temp. Phys., 2010. 36: 590) could not be realized due to the enormous heat release expelling the nanospheres from the vortex. Also, Gordon’s hypothesis on the nanowires formation in the quantum vortices contradicts the observations that nanowires form above the λ-point (when no quantum vortices exist) and on the superfluid helium’s surface (parallel to it), which is always perpendicular to the quantum vortices. The nanowires forming process in the bulk and dropwise liquid helium was described as a special case of aggregation controlled by the diffusion in the external electric field. The nanospheres charging occurs due to the thermoelectric emission due to their overheating and also due to the laser ablation. The charged nanospheres attract the neutral ones to minimize the electrostatic energy and also attract to the elevations (field concentrators) on the conductive surfaces surrounding the experimental volume. Both processes lead to the nanowires forming, and the drift prevails over diffusion in both cases. The described mechanism leads to the forming of the self-similar anisometric structures that is in agreement with the experimental data.

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Publication details

The article was received on 17 Jul 2018, accepted on 11 Feb 2019 and first published on 12 Feb 2019


Article type: Paper
DOI: 10.1039/C8CP04518F
Citation: Phys. Chem. Chem. Phys., 2019, Accepted Manuscript

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    DRIFT MECHANISM OF THE METAL NANOWIRES FORMATION IN LIQUID HELIUM

    S. Stovbun and A. Skoblin, Phys. Chem. Chem. Phys., 2019, Accepted Manuscript , DOI: 10.1039/C8CP04518F

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