David J. S. Birch, Philip Yip

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)peer-review

4 Citations (Scopus)
124 Downloads (Pure)


Methods and protocols are described when using fluorescence metrology to determine the average nanoparticle (np) size in colloids in the range of 1–10 nm. The technique is based on determining the rotational correlation time of the np from the decay of fluorescence anisotropy of a dye that is electrostatically or covalently attached to the np as it undergoes Brownian rotation. The np size is then calculated from the Stokes–Einstein equation. The exemplar of silica nps is presented, but the approach can also be applied to other types of nps.
Original languageEnglish
Title of host publicationFluorescence Spectroscopy and Microscopy
Subtitle of host publicationMethods and Protocols
EditorsYves Engelborghs, Antonie Visser
Place of PublicationNew York
Number of pages24
Publication statusPublished - 2014

Publication series

NameMethods in Molecular Biology
PublisherHumana Press


  • fluorescence anisotropy
  • fluorescence lifetime
  • nanoparticle
  • silica
  • nanometrology
  • LUDOX®
  • sol–gel


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