Single-Molecule Interfacial Electron Transfer in Donor-Bridge-Nanoparticle Acceptor Complexes

Jin, Shengye; Snoeberger, Robert C.; Issac, Abey; Stockwell, David; Batista, Víctor S.; Lian, Tianquan

doi:10.1021/jp911662g

Cited by 27 publications

(42 citation statements)

References 85 publications

(179 reference statements)

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“…However, over the past decade, following a pioneering work by Lu and Xie, 130 the single-molecule fluorescence spectroscopy became a powerful analytical technique for studying intramolecular [131][132][133][134][135] and interfacial [136][137][138][139][140][141][142][143][144] ET dynamics in various complex systems.…”

Section: Interfacial Electron Transfer On Tiomentioning

confidence: 99%

Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions

2010

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Nanostructured metal oxide semiconductors, such as TiO(2) and ZnO, have attracted great attention as the promising material for photovoltaic devices, photocatalysts for water splitting and environmental purification, sensors, batteries, etc. In this critical review, we have focused on the on-site observation of interfacial chemical reactions involving charge carriers and reactive oxygen species (ROS), such as singlet oxygen and the hydroxyl radical, generated by the photoexcitation of TiO(2) nanoparticles using single-molecule, single-particle fluorescence spectroscopy. Advanced fluorescence imaging techniques enable us to determine the location of the photocatalytically active sites that are closely related to the defects heterogeneously distributed on the surface. Consequently, this review provides a great opportunity to understand the temporal and spatial heterogeneities within an individual catalyst particle, allowing for the potential use of single-molecule, single-particle approaches in the analysis of photocatalytic reactions (189 references).

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Section: Interfacial Electron Transfer On Tiomentioning

confidence: 99%

Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions

2010

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“…As single fluorescent molecules are sensitive to their surrounding environments, profiling individual molecules and probing single molecules including fluorescence intensity time traces, spectra and fluorescence lifetimes can provide unique information about the chemical and physical characteristics of the local environment and reveal the static and dynamic heterogeneity. Single-molecule spectroscopy has been performed for sophisticated studies such as intersystem crossing [27,28], energy transfer [25,29], electron transfer [6,7,24] and spectral diffusion [30]. The interfacial electron transfer mechanisms of fluorophores on TiO 2 semiconductor substrates are well documented [7,29,31–34].…”

Section: Introductionmentioning

confidence: 99%

Photophysical Behaviors of Single Fluorophores Localized on Zinc Oxide Nanostructures

Zhang

Lakowicz

2012

IJMS

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Single-molecule fluorescence spectroscopy has now been widely used to investigate complex dynamic processes which would normally be obscured in an ensemble-averaged measurement. In this report we studied photophysical behaviors of single fluorophores in proximity to zinc oxide nanostructures by single-molecule fluorescence spectroscopy and time-correlated single-photon counting (TCSPC). Single fluorophores on ZnO surfaces showed enhanced fluorescence brightness to various extents compared with those on glass; the single-molecule time trajectories also illustrated pronounced fluctuations of emission intensities, with time periods distributed from milliseconds to seconds. We attribute fluorescence fluctuations to the interfacial electron transfer (ET) events. The fluorescence fluctuation dynamics were found to be inhomogeneous from molecule to molecule and from time to time, showing significant static and dynamic disorders in the interfacial electron transfer reaction processes.

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“…And the changes of fluorescence lifetimes were attributed to the FET (Guo et al, 2007;Jin, 2010). Fig.…”

Section: Electric Current Dependence Of Fluorescence Lifetimementioning

confidence: 93%

Single-Molecule Recognition and Dynamics with Pulsed Laser Excitation

Chen¹,

Gao²,

Liu³

et al. 2012

Laser Pulses - Theory, Technology, and Applications

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Single-Molecule Interfacial Electron Transfer in Donor-Bridge-Nanoparticle Acceptor Complexes

Cited by 27 publications

References 85 publications

Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions

Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions

Photophysical Behaviors of Single Fluorophores Localized on Zinc Oxide Nanostructures

Single-Molecule Recognition and Dynamics with Pulsed Laser Excitation

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