Electrical transport study of individually-wired colloidal nano-rods

Hadar Steineber*, Adam Faust, Uri Banin, Omri Wolf, Yigal Lilach, Oded Millo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Colloidal semiconducting nano-particles can be fabricated with fine control over size, shape and composition. They have been studied extensively by optical techniques, but very few attempts have been made to wire such particles into an electrical circuit. This work presents a study of wiring individual CdSe and CdS nano-rods, 30-70 nm long and of 4-5 nm diameter, by applying the Electron-Beam-Induced-Deposition (EBID) technique. EBID is based on electron-bean dissociation of precursor molecules and allows the single-step in-situ deposition of thin (< 10 nm) metallic lines onto a substrate. The resulting devices are measured at T = 4-300K. At 4K many of the devices exhibit smooth I(V) curves with no sharp onset features, which remarkably fit a field-effect (Fowler-Nordheim) tunneling model. All devices exhibit an anomalous exponential temperature dependence, of the form I ~ exp(T/To). This highly irregular behavior, which can not be explained by any hopping or activation model, is interpreted by accounting for the lowering of the conduction band due to lattice dilation and phonon-coupling.

Original languageEnglish
Title of host publication2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009
Pages887-889
Number of pages3
StatePublished - 2009
Event2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009 - Genoa, Italy
Duration: 26 Jul 200930 Jul 2009

Publication series

Name2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009

Conference

Conference2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009
Country/TerritoryItaly
CityGenoa
Period26/07/0930/07/09

Keywords

  • Nanolithography
  • Semiconductor nanorods
  • Tranport through nanocrystals

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