Electrical current switching in single CdSe nanorods

Hadar Steinberg, Omri Wolf, Adam Faust, Asaf Salant, Yigal Lilach, Oded Millo*, Uri Banin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Electrical current measurements through individually wired colloidal CdSe nanorods exhibit pronounced multistability. This current switching is analogous to the widely observed fluorescence intermittency in similar systems and may be associated with surface charge dynamics. Such association is quantitatively established for the case when the current is bistable, where the probability of the sojourn time t at the high or low current state follows an exponential dependence. Remarkably, this behavior can be modeled by charging dynamics of a single surface trap, whose position could be estimated from the intermittent current-voltage characteristics. The methodology presented here provides a unique route for charge dynamic sensing at the nanoscale, where the nanorod senses its own surface charge.

Original languageAmerican English
Pages (from-to)2416-2420
Number of pages5
JournalNano Letters
Volume10
Issue number7
DOIs
StatePublished - 14 Jul 2010

Keywords

  • Charging effects
  • Electrical transport
  • Nanoelectronics
  • Semiconductor nanorods

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