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17 June 1993 Diffusion of single molecules through a Gaussian laser beam
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Proceedings Volume 1921, Laser Spectroscopy of Biomolecules; (1993)
Event: Laser Spectroscopy of Biomolecules: 4th International Conference on Laser Applications in Life Sciences, 1992, Jyvaskyla, Finland
The diffusion of a single molecule through a sharply focused laser beam has been observed. The diffusion was observed by recording photoelectron bursts of single molecules in transit through the laser beam with Gaussian intensity profile. Up to 20 photoelectrons were detected for Rhodamin 6G in a transit time of 40 .ts which corresponds to the diffusion time through a volume element of 2x10'61. From the intensity correlation the probability for the occurence of one molecule in the volume element of observation is determined. The existence of one molecule events is also verified by the measured and calculated photoelectron number distribution.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rudolf Rigler and Ulo Mets "Diffusion of single molecules through a Gaussian laser beam", Proc. SPIE 1921, Laser Spectroscopy of Biomolecules, (17 June 1993);

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