Quantum jumps of single molecules at room temperature

T. Ha; Th Enderle; D. S. Chemla; P. R. Selvin; S. Weiss

doi:10.1016/S0009-2614(97)00440-5

Quantum jumps of single molecules at room temperature

T. Ha, Th Enderle, D. S. Chemla, P. R. Selvin, S. Weiss

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Abstract

The room temperature dynamics of single fluorescent dye molecules adsorbed on dry surfaces was investigated with submillisecond time resolution. Rapid turn-on and off events that satisfy stochastic statistics of quantum jumps were observed. These jumps were most likely intersystem crossing transitions to the triplet state, individually resolved due to the extended triplet state lifetime τ_off in the dry condition. Saturation study of such single molecules confirmed the extended τ_off. Distributions in intersystem crossing yield Y_ISC and in τ_off, probably due to different local environment, were measured. Moreover, individual molecules exhibited abrupt changes in τ_off and Y_ISC, correlated with spectral changes of the molecular emission.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Chemical Physics Letters
Volume	271
Issue number	1-3
DOIs	https://doi.org/10.1016/S0009-2614(97)00440-5
State	Published - 6 Jun 1997
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by the Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory under US Department of Energy, Contract No. DE-AC03-76SF00098 and by the Office of Naval Research, Contract No. N00014-95-F-0099.

Funding

This research was supported by the Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory under US Department of Energy, Contract No. DE-AC03-76SF00098 and by the Office of Naval Research, Contract No. N00014-95-F-0099.

Funders	Funder number
US Department of Energy	DE-AC03-76SF00098
Office of Naval Research
Lawrence Berkeley National Laboratory

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10.1016/S0009-2614(97)00440-5

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note = "Funding Information: This research was supported by the Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory under US Department of Energy, Contract No. DE-AC03-76SF00098 and by the Office of Naval Research, Contract No. N00014-95-F-0099.",

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AU - Ha, T.

AU - Enderle, Th

AU - Chemla, D. S.

AU - Selvin, P. R.

AU - Weiss, S.

N1 - Funding Information: This research was supported by the Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory under US Department of Energy, Contract No. DE-AC03-76SF00098 and by the Office of Naval Research, Contract No. N00014-95-F-0099.

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N2 - The room temperature dynamics of single fluorescent dye molecules adsorbed on dry surfaces was investigated with submillisecond time resolution. Rapid turn-on and off events that satisfy stochastic statistics of quantum jumps were observed. These jumps were most likely intersystem crossing transitions to the triplet state, individually resolved due to the extended triplet state lifetime τoff in the dry condition. Saturation study of such single molecules confirmed the extended τoff. Distributions in intersystem crossing yield YISC and in τoff, probably due to different local environment, were measured. Moreover, individual molecules exhibited abrupt changes in τoff and YISC, correlated with spectral changes of the molecular emission.

AB - The room temperature dynamics of single fluorescent dye molecules adsorbed on dry surfaces was investigated with submillisecond time resolution. Rapid turn-on and off events that satisfy stochastic statistics of quantum jumps were observed. These jumps were most likely intersystem crossing transitions to the triplet state, individually resolved due to the extended triplet state lifetime τoff in the dry condition. Saturation study of such single molecules confirmed the extended τoff. Distributions in intersystem crossing yield YISC and in τoff, probably due to different local environment, were measured. Moreover, individual molecules exhibited abrupt changes in τoff and YISC, correlated with spectral changes of the molecular emission.

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Quantum jumps of single molecules at room temperature

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