Asymmetric quantum dot growth via temperature cycling

Rabeka Alam, Mathew M. Maye

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The morphology of semiconductive quantum dots (qdots) and quantum rods (qrods) has been shown to be tailored by choice of ligand, size, and crystal structure. In this paper, we show that temperature cycling during nucleation and growth can also tailor morphology. By quenching nucleation and growth after precursor injection, followed by slow temperature ramping, we are able to first synthesis CdSe qdots with teardrop morphology and Wurtzite crystallinity. Using these teardrops as core seeds, CdS shells can be epitaxially deposited also using temperature cycling to fabricate CdSe/CdS core/shell structures with novel asymmetric head-tail morphology. These qdots and qrods were characterized for optical absorption, photoluminescent emission, morphology, and crystal structure.

Original languageEnglish (US)
Pages (from-to)114-117
Number of pages4
JournalInorganica Chimica Acta
Volume380
Issue number1
DOIs
StatePublished - Jan 15 2012

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Keywords

  • Asymmetric
  • Nanomaterials
  • Quantum dots

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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