Chemical transformation of au-tipped CdS nanorods into AuS/Cd core/shell particles by electron beam irradiation

Marijn A. Van Huis*, Albert Figuerola, Changming Fang, Armand Béché, Henny W. Zandbergen, Liberato Manna

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We demonstrate that electron irradiation of colloidal CdS nanorods carrying Au domains causes their evolution into AuS/Cd core/shell nanoparticles as a result of a concurrent chemical and morphological transformation. The shrinkage of the CdS nanorods and the growth of the Cd shell around the Au tips are imaged in real time, while the displacement of S atoms from the CdS nanorod to the Au domains is evidenced by high-sensitivity energy-dispersive X-ray (EDX) spectroscopy. The various nanodomains display different susceptibility to the irradiation, which results in nanoconfigurations that are very different from those obtained after thermal annealing. Such physical manipulations of colloidal nanocrystals can be exploited as a tool to access novel nanocrystal heterostructures.

Original languageEnglish (US)
Pages (from-to)4555-4561
Number of pages7
JournalNano Letters
Volume11
Issue number11
DOIs
StatePublished - Nov 9 2011

ASJC Scopus subject areas

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

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