Interaction of CdSe/CdS core-shell quantum dots and Pseudomonas aeruginosa

Deborah M. Aruguete, Jeremy S. Guest, William W. Yu, Nancy G. Love, Michael F. Hochella

Research output: Contribution to journalArticlepeer-review

Abstract

Polymer-encapsulated CdSe/CdS core-shell quantum dots, which closely model commercially-available quantum dots, were tested for toxic effects on Pseudomonas aeruginosa. The size, aggregation state, and dissolution of the quantum dots were characterised before and after exposure to bacteria. The physical association of quantum dots with bacterial cells was also examined. The quantum dots were found to have no effect upon bacterial viability. They remained chemically stable and dispersed in solution even with bacterial exposure. It is suggested that the absence of toxicity is the result of the stability of the quantum dots due to their protective polymer coatings, and their apparent lack of association with bacterial cells. The stability of the quantum dots, even in the presence of the bacteria, as well as their non-toxicity has implications for their environmental behaviour and ultimate fate.

Original languageEnglish (US)
Pages (from-to)28-35
Number of pages8
JournalEnvironmental Chemistry
Volume7
Issue number1
DOIs
StatePublished - Mar 8 2010
Externally publishedYes

Keywords

  • Bacterial toxicity
  • Engineered nanomaterials
  • Inorganic nanoparticles

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Environmental Chemistry
  • Geochemistry and Petrology

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