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Related Experiment Video

Updated: Jun 28, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
08:19

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

On doping CdS/ZnS core/shell nanocrystals with Mn.

Yongan Yang1, Ou Chen, Alexander Angerhofer

  • 1Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA.

Journal of the American Chemical Society
|October 28, 2008
PubMed
Summary

This study reveals Mn doping in CdS/ZnS nanocrystals involves adsorption and replacement kinetics. Doping yield depends on temperature, not size or structure, suggesting a mechanism driven by chemical kinetics.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Kinetics

Background:

  • Semiconductor nanocrystals (NCs) like CdS/ZnS are crucial for optoelectronic applications.
  • Doping NCs with transition metals, such as manganese (Mn), enhances their properties.
  • Understanding the doping mechanism is vital for controlled synthesis and performance.

Purpose of the Study:

  • To elucidate the doping mechanism of Mn in CdS/ZnS core/shell NCs.
  • To investigate the kinetics of Mn adsorption and its incorporation during synthesis.
  • To determine the factors influencing Mn doping yield and its removal during shell growth.

Main Methods:

  • A three-step synthesis approach for CdS/ZnS core/shell NCs.
  • Electron paramagnetic resonance spectroscopy (EPR) to monitor Mn species.

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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of Manganese(II) Acetylacetonate
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Last Updated: Jun 28, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
08:19

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of Manganese(II) Acetylacetonate
09:02

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of Manganese(II) Acetylacetonate

Published on: June 18, 2020

  • Inductively coupled plasma atomic emission spectroscopy (ICP) for doping level and yield analysis.

    • Main Results:

    • Mn adsorption involves weakly and strongly bound species with distinct kinetics.
    • Strongly bound Mn exhibits first-order kinetics with a high activation energy (211 ± 13 kJ/mol).
    • Both Mn species can be removed during ZnS shell growth, with replacement dependent on temperature.

    Conclusions:

    • Nanocrystal doping is governed by the chemical kinetics of dopant adsorption and replacement.
    • The temperature of ZnS shell growth significantly impacts the yield of strongly bound Mn replacement.
    • Mn doping yield is independent of NC size and crystal structure, highlighting kinetic control.