Sequential Anion and Cation Exchange Reactions for Complete Material Transformations of Nanoparticles with Morphological Retention

James M. Hodges, Karel Kletetschka, Julie L. Fenton, Carlos G. Read, Raymond E. Schaak

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Ion exchange reactions of colloidal nanocrystals provide access to complex products that are synthetically challenging using traditional hot-injection methods. However, such reactions typically achieve only partial material transformations by employing either cation or anion exchange processes. It is now shown that anion and cation exchange reactions can be coupled together and applied sequentially in one integrated pathway that leads to complete material transformations of nanocrystal templates. Although the product nanocrystals do not contain any of the original constituent elements, the original morphology is retained, thereby fully decoupling morphology and composition control. The sequential anion/cation exchange process was applied to pseudo-spherical CdO nanocrystals and ZnO tetrapods, producing fully transformed and shape-controlled nanocrystals of copper and silver sulfides and selenides. Furthermore, hollow core-shell tetrapod ZnS@CdS heterostructures were readily accessible.

Original languageEnglish (US)
Pages (from-to)8669-8672
Number of pages4
JournalAngewandte Chemie - International Edition
Volume54
Issue number30
DOIs
StatePublished - Jul 20 2015

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Nanocrystals
Anions
Cations
Ion exchange
Negative ions
Positive ions
Nanoparticles
Heterojunctions
Copper
Silver
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

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abstract = "Ion exchange reactions of colloidal nanocrystals provide access to complex products that are synthetically challenging using traditional hot-injection methods. However, such reactions typically achieve only partial material transformations by employing either cation or anion exchange processes. It is now shown that anion and cation exchange reactions can be coupled together and applied sequentially in one integrated pathway that leads to complete material transformations of nanocrystal templates. Although the product nanocrystals do not contain any of the original constituent elements, the original morphology is retained, thereby fully decoupling morphology and composition control. The sequential anion/cation exchange process was applied to pseudo-spherical CdO nanocrystals and ZnO tetrapods, producing fully transformed and shape-controlled nanocrystals of copper and silver sulfides and selenides. Furthermore, hollow core-shell tetrapod ZnS@CdS heterostructures were readily accessible.",
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Sequential Anion and Cation Exchange Reactions for Complete Material Transformations of Nanoparticles with Morphological Retention. / Hodges, James M.; Kletetschka, Karel; Fenton, Julie L.; Read, Carlos G.; Schaak, Raymond E.

In: Angewandte Chemie - International Edition, Vol. 54, No. 30, 20.07.2015, p. 8669-8672.

Research output: Contribution to journalArticle

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