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Characterization of the Organic Ligand Shell of Semiconductor Quantum Dots by Fluorescence Quenching Experiments

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2011

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Jander, Sebastian
Hoppe, Kathrin
Weller, Horst

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https://doi.org/10.1021/nn202748v
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ACS Nano. 2011, 5(10), pp. 8115-8123. ISSN 1936-0851. eISSN 1936-086X. Available under: doi: 10.1021/nn202748v

Zusammenfassung

We present the characterization of the organic ligand shell of CdSe/CdxZn1-x)S/ZnS nanoparticles by means of fluorescence quenching experiments. Both electron scavengers and acceptors for resonance energy transfer were employed as probes. Different quenching behavior for short and long chain thiol ligands in water was found. It could be shown that poly(ethylene oxide) (PEO)-capping of the particles comprises a densely packed inner shell and a loosely packed outer shell in which ions and small molecules diffuse unhindered. A quantitative uptake of quencher molecules into the PEO shell was observed, through which the particle volume including the ligand sphere could be determined.

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540 Chemie

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ISO 690BOLDT, Klaus, Sebastian JANDER, Kathrin HOPPE, Horst WELLER, 2011. Characterization of the Organic Ligand Shell of Semiconductor Quantum Dots by Fluorescence Quenching Experiments. In: ACS Nano. 2011, 5(10), pp. 8115-8123. ISSN 1936-0851. eISSN 1936-086X. Available under: doi: 10.1021/nn202748v
BibTex
@article{Boldt2011-10-25Chara-44268,
  year={2011},
  doi={10.1021/nn202748v},
  title={Characterization of the Organic Ligand Shell of Semiconductor Quantum Dots by Fluorescence Quenching Experiments},
  number={10},
  volume={5},
  issn={1936-0851},
  journal={ACS Nano},
  pages={8115--8123},
  author={Boldt, Klaus and Jander, Sebastian and Hoppe, Kathrin and Weller, Horst}
}
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