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Proceedings Paper

Multiphoton-excited fluorescence particle metrology: application to silica hydrogels
Author(s): David J. S. Birch; Chris D. Geddes; Jan Karolin; Klaas Wynne
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Paper Abstract

We demonstrate a new application of multiphoton excitation of fluorescence; the measurement of silica particle growth during sol-gel polymerization. Recently we have reported the use of fluorescence anisotropy as an alternative approach to nm particle sizing using conventional techniques such as small angle light, neutron or x-ray scattering. Advantages of our approach include near angstrom resolution, minimal interference from the gel network as well as the additional benefits of providing microviscosity and hydrodynamic information. Fluorescence anisotropy applied to particle sizing in colloids in general is still in its infancy, but in this paper we show using probes fluorescein and rhodamine 6G, under conditions unsuitable for one-photon excitation, can be successful with multiphoton excitation.

Paper Details

Date Published: 10 May 2001
PDF: 7 pages
Proc. SPIE 4252, Advances in Fluorescence Sensing Technology V, (10 May 2001); doi: 10.1117/12.426737
Show Author Affiliations
David J. S. Birch, Univ. of Strathclyde (United Kingdom)
Chris D. Geddes, Univ. of Strathclyde (United Kingdom)
Jan Karolin, Univ. of Strathclyde (Sweden)
Klaas Wynne, Univ. of Strathclyde (United Kingdom)


Published in SPIE Proceedings Vol. 4252:
Advances in Fluorescence Sensing Technology V
Joseph R. Lakowicz; Richard B. Thompson, Editor(s)

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