Nanogallery
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TODAY AUGUST 16, 2018

Superconductivity of nanowires produced by metal decoration of carbon nanotubes

The picture shows a superconducting MoGe nanowire (gray line) produced by sputter-coating a single-wall carbon nanotube placed across a deep trench etched into the substrate
The left picture shows a superconducting MoGe nanowire (gray line) produced by sputter-coating a single-wall carbon nanotube placed across a deep trench etched into the substrate.
The left picture shows a superconducting MoGe nanowire (gray line) produced by sputter-coating a single-wall carbon nanotube placed across a deep trench etched into the substrate. The trench appears black in the picture. The wire shown on the picture is about 8 nm in diameter. The smallest diameter that was obtain reliably with this method is 5 nm. A quantum superconductor-insulator (SI) transition is found in ultrathin superconducting nanowires of this type. The plots on the right show the measurements on a series of nanowires of various thickness. An SI transition is seen. The transition occurs when the normal resistance of the wire reached the quantum resistance for Cooper pairs, i.e. Rq=h/4e2~6.45 kW.


1. A. Bezryadin, Superconductivity in nanowires: Fabrication and quantum transport (Wiley-VCH, October 2012).
2. A. Bezryadin, C.N. Lau, and M. Tinkham, "Quantum suppression of superconductivity in ultrathin nanowires," Nature 404, 971974 (2000).
See also images:

The substrate is dried off with forced nitrogen gas, and those nanotubes that settled onto the surface of the susbstrate may remain (highlighted). Some of these nanotubes my span the trench.
Nanowerk Nanotechnology Portal
http://www.nanowerk.com

Nanohedron
http://www.nanohedron.com

Biomolecules
http://perso.curie.fr/Simon.Sc..


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