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Fluorescence imaging of single molecules in polymer microspheres

✍ Scribed by M.D. Barnes; K.C. Ng; K.P. McNamara; C.-Y. Kung; J.M. Ramsey; S.C. Hill

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 332 KB
Volume: 36
Category: Article
ISSN: 0196-4763
DOI: 10.1002/(sici)1097-0320(19990701)36:3<169::aid-cyto4>3.0.co;2-i

No coin nor oath required. For personal study only.

✦ Synopsis

We report on far-field fluorescence imaging of single molecules in spherical polymer microparticles produced from solution by using microdroplet techniques. The fluorescence photobleaching quantum yields of rhodamine 6G in a common water-soluble polymer (polyvinyl alcohol) are at least five times smaller, corresponding to proportionally larger average fluorescence signals, than those in ethanolic solvents. This allows for acquisition of multiple images from a single molecule on a time scale of several minutes. We also show that fluorescent images of single molecules in microspheres can be calculated from semiclassic electrodynamics, which may ultimately be useful in retrieving dynamical information from experimental images.

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