Nanocrystal inks without ligands: Stable colloids of bare germanium nanocrystals

Zachary C. Holman, Uwe R. Kortshagen

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Colloidal semiconductor nanocrystals typically have ligands attached to their surfaces that afford solubility in common solvents but hinder charge transport in nanocrystal films. Here, an alternative route is explored in which bare germanium nanocrystals are solubilized by select solvents to form stable colloids without the use of ligands. A survey of candidate solvents shows that germanium nanocrystals are completely solubilized by benzonitrile, likely because of electrostatic stabilization. Films cast from these dispersions are uniform, dense, and smooth, making them suitable for device applications without postdeposition treatment.

Original languageEnglish (US)
Pages (from-to)2133-2136
Number of pages4
JournalNano Letters
Volume11
Issue number5
DOIs
StatePublished - May 11 2011

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Keywords

  • Nanocrystal
  • benzonitrile
  • colloid
  • germanium
  • quantum dot

ASJC Scopus subject areas

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

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