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Int. J. Mol. Sci. 2012, 13(9), 11130-11140; doi:10.3390/ijms130911130

Electric Field Induced Fluorescence Modulation of Single Molecules in PMMA Based on Electron Transfer

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China
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Received: 12 July 2012 / Revised: 24 August 2012 / Accepted: 24 August 2012 / Published: 6 September 2012
(This article belongs to the Special Issue Advances in Single Molecule Spectroscopy)
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Abstract

We present a method to modulate the fluorescence of non-polar single squaraine-derived rotaxanes molecules embedded in a polar poly(methyl methacrylate) (PMMA) matrix under an external electric field. The electron transfer between single molecules and the electron acceptors in a PMMA matrix contributes to the diverse responses of fluorescence intensities to the electric field. The observed instantaneous and non-instantaneous electric field dependence of single-molecule fluorescence reflects the redistribution of electron acceptors in PMMA induced by electronic polarization and orientation polarization of polar polymer chains in an electric field.
Keywords: single-molecule fluorescence; modulation; external electric fields; polarization single-molecule fluorescence; modulation; external electric fields; polarization
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MDPI and ACS Style

Chen, R.; Gao, Y.; Zhang, G.; Wu, R.; Xiao, L.; Jia, S. Electric Field Induced Fluorescence Modulation of Single Molecules in PMMA Based on Electron Transfer. Int. J. Mol. Sci. 2012, 13, 11130-11140.

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