Nanoheterostructure cation exchange: Anionic framework conservation

Prashant K. Jain, Lilac Amirav, Shaul Aloni, A. Paul Alivisatos

Research output: Contribution to journalArticle

Abstract

In ionic nanocrystals the cationic sublattice can be replaced with a different metal ion via a fast, simple, and reversible place exchange, allowing postsynthetic modification of the composition of the nanocrystal, while preserving its size and shape. Here, we demonstrate that, during such an exchange, the anionic framework of the crystal is preserved. When applied to nanoheterostructures, this phenomenon ensures that compositional interfaces within the heterostructure are conserved throughout the transformation. For instance, a morphology composed of a CdSe nanocrystal embedded in a CdS rod (CdSe/CdS) was exchanged to a PbSe/PbS nanorod via a Cu2Se/Cu 2S structure. During every exchange cycle, the seed size and position within the nanorod were preserved, as evident by excitonic features, Z-contrast imaging, and elemental line scans. Anionic framework conservation extends the domain of cation exchange to the design of more complex and unique nanostructures.

Original languageEnglish (US)
Pages (from-to)9997-9999
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number29
DOIs
StatePublished - Jul 28 2010
Externally publishedYes

Fingerprint

seed size
Nanoparticles
Nanocrystals
Cations
Nanotubes
Conservation
ion exchange
Ion exchange
Positive ions
crystal
Nanorods
ion
metal
Nanostructures
Metal ions
Seed
Heterojunctions
Seeds
Metals
Ions

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Nanoheterostructure cation exchange : Anionic framework conservation. / Jain, Prashant K.; Amirav, Lilac; Aloni, Shaul; Alivisatos, A. Paul.

In: Journal of the American Chemical Society, Vol. 132, No. 29, 28.07.2010, p. 9997-9999.

Research output: Contribution to journalArticle

Jain, Prashant K. ; Amirav, Lilac ; Aloni, Shaul ; Alivisatos, A. Paul. / Nanoheterostructure cation exchange : Anionic framework conservation. In: Journal of the American Chemical Society. 2010 ; Vol. 132, No. 29. pp. 9997-9999.
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