Size of Submicrometer Particles Measured by FCS : Correction of the Confocal Volume

When fluorescence correlation spectroscopy (FCS) in combination with a confocal microscope is used to determine the hydrodynamic radius a of particles comparable to or larger than the linear size σ of the confocal volume of the microscope, a correction must be used that depends on the a(2)/σ(2) rati...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 31(2015), 24 vom: 23. Juni, Seite 6681-7
1. Verfasser: Deptuła, Tobiasz (VerfasserIn)
Weitere Verfasser: Buitenhuis, Johan, Jarzębski, Maciej, Patkowski, Adam, Gapinski, Jacek
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't
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520 |a When fluorescence correlation spectroscopy (FCS) in combination with a confocal microscope is used to determine the hydrodynamic radius a of particles comparable to or larger than the linear size σ of the confocal volume of the microscope, a correction must be used that depends on the a(2)/σ(2) ratio and the distribution of the dye within the particle. Here we present the experimental validation of the theoretically predicted approximate correction necessary for appropriate measurements of the size of uniformly fluorescently labeled spheres of radius comparable to the size of the confocal volume. We also test the approximate correction formula for different ranges of the a/σ ratio and propose a simple procedure to obtain the correct nanoparticle size from such a measurement 
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650 4 |a Research Support, Non-U.S. Gov't 
700 1 |a Buitenhuis, Johan  |e verfasserin  |4 aut 
700 1 |a Jarzębski, Maciej  |e verfasserin  |4 aut 
700 1 |a Patkowski, Adam  |e verfasserin  |4 aut 
700 1 |a Gapinski, Jacek  |e verfasserin  |4 aut 
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