PET imaging and biodistribution of silicon quantum dots in mice

Chuqiao Tu, Xuchu Ma, Adrian House, Susan M. Kauzlarich, Angelique Y. Louie

Research output: Contribution to journalArticlepeer-review

89 Scopus citations


Investigation of nanomaterial disposition and fate in the body is critical before such material can be translated into clinical application. Herein a new macrocyclic ligand-64Cu2+ complex was synthesized and used to label dextran-coated silicon quantum dots (QD), with an average hydrodynamic diameter of 15.1 ± 7.6 nm. The chelate showed exceptional stability, demonstrated by no loss radiolabel under a ligand competition reaction with EDTA. The QDs' biodistribution in mice was quantitatively evaluated by in vivo positron emission tomography (PET) imaging and ex vivo gamma counting. Results showed that they were excreted via renal filtration shortly postinjection and also accumulated in the liver.

Original languageEnglish (US)
Pages (from-to)285-288
Number of pages4
JournalACS Medicinal Chemistry Letters
Issue number4
StatePublished - Apr 14 2011


  • Biodistribution
  • imaging
  • positron emission tomography
  • quantum dot
  • silicon

ASJC Scopus subject areas

  • Organic Chemistry
  • Drug Discovery
  • Biochemistry


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