Nanoscale near-field imaging of excitons in single heterostructured nanorods

Eyal Yoskovitz, Gabi Menagen, Amit Sitt, Ella Lachman, Uri Banin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The mixed 0D-1D dimensionality of heterostructured semiconductor nanorods, resulting from the dot-in-rod architecture, raises intriguing questions concerning the location and confinement of the exciton and the origin of the fluorescence in such structures. Using apertureless near-field distance-dependent lifetime imaging together with AFM topography, we directly map the emission and determine its location with high precision along different types of nanorods. We find that the fluorescence is emanating from a sub-20 nm region, correlated to the seed location, clearly indicating exciton localization.

Original languageAmerican English
Pages (from-to)3068-3072
Number of pages5
JournalNano Letters
Volume10
Issue number8
DOIs
StatePublished - 11 Aug 2010

Keywords

  • Near-field imaging
  • excitons
  • fluorescence lifetime
  • fluorescence quenching and enhancement
  • seeded nanorods

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