, 6:735 | Cite as

Quenching of Fluorescence from CdSe/ZnS Nanocrystal QDs Near Copper Nanoparticles in Aqueous Solution

  • Sanchari Chowdhury
  • Venkat R. BhethanabotlaEmail author
  • Rajan Sen


Significant quenching of fluorescence from CdSe/ZnS nanocrystal quantum dots (QDs) coated with mercaptoundecanoic ligands has been realized by copper nanoparticles (NPs). (a) Static quenching in the electrostatic association between the CdSe/ZnS QDs and cetyltrimethylammonium bromide-coated Cu NPs and (b) dynamic quenching of the same nanocrystals by polyvinylpyrrolidone-coated Cu NPs were studied. In both cases, the quenching of fluorescence from the CdSe/ZnS nanocrystals is sensitive to nanomolar concentrations of the copper NPs, and the quenching efficiency increases as spectral overlap between the CdSe/ZnS emission and the copper nanoparticle absorption increases. This suggests that the observed quenching is a result of energy transfer processes. These findings open new avenues for the utilization of Cu NPs in energy transfer-based applications.


Static quenching Dynamic quenching Stern–Volmer Spectral overlap Energy transfer 



This material is based upon work supported by the National Science Foundation under grant no. CMS-409401.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Sanchari Chowdhury
    • 1
    • 3
  • Venkat R. Bhethanabotla
    • 1
    Email author
  • Rajan Sen
    • 2
  1. 1.Department of Chemical & Biomedical EngineeringUniversity of South FloridaTampaUSA
  2. 2.Department of Civil & Environmental EngineeringUniversity of South FloridaTampaUSA
  3. 3.Department of ChemistryCarnegie Mellon UniversityPittsburghUSA

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