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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

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Published on: June 18, 2013

Long, highly-ordered high-temperature superconductor nanowire arrays.

Ke Xu¹, James R Heath

¹Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 127-72, Pasadena, California 91125, USA.

|October 29, 2008

Summary

High-temperature superconductor nanowires, including Yttrium Barium Copper Oxide (YBCO), show superconducting properties above liquid nitrogen temperatures. Their performance as nanoelectronic components is enhanced by size-dependent effects, explained by phase-slip theories.

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Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

High-temperature superconductors, such as Yttrium Barium Copper Oxide (YBa2Cu3O(7-delta)), are crucial for advanced electronic applications.
Understanding nanoscale superconducting properties is essential for developing next-generation nanoelectronic devices.

Purpose of the Study:

To report the preparation and electrical properties of high-temperature superconductor nanowire arrays for the first time.
To investigate the size-dependent superconducting behavior of YBa2Cu3O(7-delta) nanowires.
To model the observed phenomena using established theories.

Main Methods:

Fabrication of YBa2Cu3O(7-delta) nanowires with dimensions down to 10 nm width and 200 microm length.
Four-point electrical measurements to determine superconducting transition temperatures and properties.
Systematic study of nanowire size effects on electrical characteristics.

Main Results:

Successful preparation of high-temperature superconductor nanowire arrays.
All studied nanowires exhibited superconducting transitions above liquid nitrogen temperature.
Transition temperature width was found to be strongly dependent on nanowire dimensions.
Observed size effects were well-modeled by phase-slip theories, yielding reasonable parameters.

Conclusions:

YBa2Cu3O(7-delta) nanowires demonstrate robust superconductivity at the nanoscale.
Nanowire dimensions significantly influence superconducting transition characteristics.
These nanowires offer potential for superconducting nanoelectronic components operating over extended temperature ranges.