Anisotropic strain-induced curvature in type-ll CdSe/CdTe nanorod heterostructures

Hunter McDaniel, Jian-Min Zuo, Moonsub Shim

Research output: Contribution to journalArticle

Abstract

(Figure Presented) Type-II band-offset CdSe/CdTe nanorod heterostructures with curved and linear shapes have been synthesized and examined with atomic-resolution transmission electron microscopy techniques. Strain from growth of larger-lattice CdTe partly on the sides of CdSe nanorod seeds is shown to lead to an overall curvature in the rods. Lattice expansion from the inner to the outer portion of the curved region exceeds the expected lattice mismatch between the two materials because of the buildup of an unusual compressive strain in the CdSe. In contrast, exclusive tip growth results in linear barbell-shaped heterostructures that do not exhibit strain-induced curvature. The ability to vary the anisotropic lattice strain should allow control over the underlying electronic structure, providing new approaches to directing photogenerated carriers that may facilitate incorporation of nanorod heterostructures in various energy applications.

Original languageEnglish (US)
Pages (from-to)3286-3288
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number10
DOIs
StatePublished - Mar 17 2010

ASJC Scopus subject areas

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

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