Superior local conductivity in self-organized nanodots on indium-tin-oxide films induced by femtosecond laser pulses

Opt Express. 2011 Nov 21;19(24):24286-97. doi: 10.1364/OE.19.024286.

Abstract

Large-area surface ripple structures of indium-tin-oxide films, composed of self-organized nanodots, were induced by femtosecond laser pulses, without scanning. The multi-periodic spacing (~800 nm, ~400 nm and ~200 nm) was observed in the laser-induced ripple of ITO films. The local conductivity of ITO films is significantly higher, by approximately 30 times, than that of the as-deposited ITO films, due to the formation of these nanodots. Such a significant change can be ascribed to the formation of indium metal-like clusters, which appear as budges of ~5 nm height, due to an effective volume increase after breaking the In-O to form In-In bonding.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electric Conductivity
  • Lasers*
  • Membranes, Artificial*
  • Nanostructures / chemistry*
  • Nanostructures / radiation effects*
  • Particle Size
  • Tin Compounds / chemistry*
  • Tin Compounds / radiation effects*

Substances

  • Membranes, Artificial
  • Tin Compounds
  • indium tin oxide