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APS » Journals » Phys. Rev. Lett. » Volume 29 » Issue 11
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Phys. Rev. Lett. 29, 705–708 (1972)

Thermodynamic Fluctuations in a Reacting System—Measurement by Fluorescence Correlation Spectroscopy

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Douglas Magde*, Elliot Elson†, and W. W. Webb‡
Cornell University, Ithaca, New York 14850

Received 10 July 1972; published in the issue dated 11 September 1972

The temporal correlations of thermodynamic concentration fluctuations have been measured in a chemically reactive system at equilibrium by observing fluctuations of the fluorescence of a reaction product. The experiment yields the chemical rate constants and diffusion coefficients and shows the coupling among them. Data are reported for binding of ethidium bromide to DNA.

© 1972 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.29.705
DOI:
10.1103/PhysRevLett.29.705
PACS:

*Now at Department of Chemistry, Washington State University, Pullman, Wash. 99163.

†Department of Chemistry.

‡School of Applied and Engineering Physics and Laboratory for Atomic and Solid State Physics.

 
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