title: Electric field induced fluorescence modulation of single molecules in PMMA based on electron transfer.
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.
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.
authors.forename: Ruiyun
authors.initials: R
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.
authors.forename: Guofeng
authors.initials: G
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.
authors.forename: Ruixiang
authors.initials: R
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.
authors.forename: Liantuan
authors.initials: L
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.
authors.forename: Suotang
authors.initials: S
authors.lastname: Jia
mesh_terms: D003503:Cyclobutanes / Q000737:chemistry*; D004560:Electricity; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D010636:Phenols / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D043862:Rotaxanes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D003503:Cyclobutanes; D005456:Fluorescent Dyes; D010636:Phenols; D043862:Rotaxanes; C480596:squaraine; D019904:Polymethyl Methacrylate
keywords: external electric fields; modulation; polarization; single-molecule fluorescence