Highly emissive nano rod-in-rod heterostructures with strong linear polarization

Amit Sitt, Asaf Salant, Gabi Menagen, Uri Banin

Research output: Contribution to journalArticlepeer-review

Abstract

We report the synthesis of CdSe/CdS rod in rod core/shell heterostructures. These rods, synthesized using a seeded-growth approach, show narrow distributions of rod diameters and lengths and exhibit high emission quantum efficiencies and highly polarized emission. The degree of polarization is controlled by the inner core rod dimensions, and it is equal or up to 1.5 times higher than the polarization of equivalent sphere in rod systems. Using the method of photoselection we measure the polarization anisotropy at different excitation wavelengths and study the interplay between electronic contribution and dielectric effects in determining the absorption and emission polarization.

Original languageEnglish
Pages (from-to)2054-2060
Number of pages7
JournalNano Letters
Volume11
Issue number5
DOIs
StatePublished - 11 May 2011

Keywords

  • Nanorods
  • fluorescence spectroscopy
  • heterostructures
  • polarization
  • seeded growth
  • synthesis

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science

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