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Baumann, G; Gryczynski, I; Földes-Papp, Z.
Anomalous behavior in length distributions of 3D random Brownian walks and measured photon count rates within observation volumes of single-molecule trajectories in fluorescence fluctuation microscopy.
Opt Express. 2010; 18(17):17883-17896 Doi: 10.1364/OE.18.017883 [OPEN ACCESS]
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Abstract:
Based on classical mean-field approximation using the diffusion equation for ergodic normal motion of single 24-nm and 100-nm nanospheres, we simulated and measured molecule number counting in fluorescence fluctuation microscopy. The 3D-measurement set included a single molecule, or an ensemble average of single molecules, an observation volume DeltaV and a local environment, e.g. aqueous solution. For the molecule number N << 1 per DeltaV, there was only one molecule at a time inside DeltaV or no molecule. The mean rate k of re-entries defined by k = N/tau(dif) was independent of the geometry of DeltaV but depended on the size of DeltaV and the diffusive properties tau(dif). The length distribution l of single-molecule trajectories inside DeltaV and the measured photon count rates I obeyed power laws with anomalous exponent kappa =-1.32 approximately -4/3.
Find related publications in this database (using NLM MeSH Indexing)
Computer Simulation -
Fluorescence -
Luminescence -
Microscopy, Confocal - methods
Microscopy, Fluorescence - methods
Models, Theoretical -
Monte Carlo Method -
Optics and Photonics - methods
Photons -
Solutions - chemistry

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