High-Quality Manganese-Doped ZnSe Nanocrystals

D. J. Norris, Nan Yao, F. T. Charnock, T. A. Kennedy

Research output: Contribution to journalArticlepeer-review

800 Scopus citations


We demonstrate high-quality, highly fluorescent, ZnSe colloidal nanocrystals (or quantum dots) that are doped with paramagnetic Mn2+ impurities. We present luminescence, magnetic circular dichroism (MCD), and electron paramagnetic resonance (EPR) measurements to confirm that the Mn impurities are embedded inside the nanocrystal. Optical measurements show that by exciting the nanocrystal, efficient emission from Mn is obtained, with a quantum yield of 22% at 295 K and 75% below 50 K (relative to Stilbene 420). MCD spectra reveal an experimental Zeeman splitting in the first excited state that is large (28 meV at 2.5 T), depends on doping concentration, and saturates at modest fields. In the low field limit, the magnitude of the effective g factor is 430 times larger than in undoped nanocrystals. EPR experiments exhibit a six-line spectrum with a hyperfine splitting of 60.4 × 10-4 cm-1, consistent with Mn substituted at Zn sites in the cubic ZnSe lattice.

Original languageEnglish (US)
Pages (from-to)3-7
Number of pages5
JournalNano Letters
Issue number1
StatePublished - Jan 2001

All Science Journal Classification (ASJC) codes

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


Dive into the research topics of 'High-Quality Manganese-Doped ZnSe Nanocrystals'. Together they form a unique fingerprint.

Cite this