Application of fluorescence depolarization to dye uptake and particle sizing in silica sols

Chris D. Geddes; David J. S. Birch; Kathleen Apperson; John M. Chevers; Ian P. McKeown

doi:10.1117/12.347523

3 May 1999 Application of fluorescence depolarization to dye uptake and particle sizing in silica sols

Chris D. Geddes, David J. S. Birch, Kathleen Apperson, John M. Chevers, Ian P. McKeown

Proceedings Volume 3602, Advances in Fluorescence Sensing Technology IV; (1999) https://doi.org/10.1117/12.347523
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

Abstract

We describe a new approach to particle size measurement in silica sols based on the decay of fluorescence anisotropy of a bound near infrared dye. Changes in particle size up to 4.5 nm are resolved with sub-nanometer resolution across the sol to gel transition.

Citation Download Citation

Chris D. Geddes, David J. S. Birch, Kathleen Apperson, John M. Chevers, and Ian P. McKeown "Application of fluorescence depolarization to dye uptake and particle sizing in silica sols", Proc. SPIE 3602, Advances in Fluorescence Sensing Technology IV, (3 May 1999); https://doi.org/10.1117/12.347523

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