PbSe Nanocrystal Assemblies: Synthesis and Structural, Optical, and Electrical Characterization

A. Sashchiuk, L. Amirav, M. Bashouti, M. Krueger, U. Sivan, E. Lifshitz

Research output: Contribution to journalArticlepeer-review

110 Scopus citations


Individual PbSe nanocrystals (NCs) were prepared by a chemical reaction between lead-cyclohexanebutirate and tri-butyl-phosphine/selenium precursors in a tri-octyl-phosphine oxide/tri-butyl-phosphine surfactant, at 118°C. Increasing precursor concentration, accompanied by an additional heating, up to 150°C, enabled the formation of NCs assemblies: a reaction time duration of 10-60 min led to the formation of monodispersed spherical polycrystalline assemblies whose average diameters ranged between 50-500 nm. A reaction time duration of >60 min enabled the formation of an ordered wire-like assembly, with a typical width of 60-150 nm and a length of 1-5 μm. The assemblies are presumably stabilized by the NCs-NCs dipole-dipole interactions, with an estimated interaction energy of -28 kJ/mol. The electrical measurement of a single wire-like assembly revealed a conductivity of 7.0 Ω -1cm-1.

Original languageEnglish
Pages (from-to)159-165
Number of pages7
JournalNano Letters
Issue number1
StatePublished - 1 Jan 2004
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering


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