An accessible approach to preparing water-soluble Mn 2+-doped (CdSSe)ZnS (core)shell nanocrystals for ratiometric temperature sensing

Chih Hao Hsia, Anna Wuttig, Haw Yang

Research output: Contribution to journalArticle

104 Scopus citations

Abstract

A new synthetic scheme allowing structural modifications to temperature-sensitive and water-soluble d-penicillamine-passivated Mn 2+-doped (CdSSe)ZnS (core)shell nanocrystals (MnQDs) was reported using air-stable chemicals. The temperature-dependent optical properties of the nanocrystals were tuned by changing their structure and composition - the ZnS shell thickness and the Mn 2+-dopant concentration. Thick ZnS shells significantly reduce the interference of nonradiative transitions on ratiometric emission intensities. High-dopant concentration affords consistent temperature sensitivity. In addition to the new base structure for quantum dot ratiometric temperature sensing via flexible, glovebox-free routes, the results also underscore the generalizability of the emission intensity ratio scheme for temperature sensing, originally proposed for rare-earth-doped materials.

Original languageEnglish (US)
Pages (from-to)9511-9522
Number of pages12
JournalACS Nano
Volume5
Issue number12
DOIs
StatePublished - Dec 27 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Keywords

  • air stable
  • green chemistry
  • nanothermometer
  • quantum dot
  • temperature- dependent lifetime

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