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Preparation, Characterization, and Photoelectric Properties of an Electrostatically Self-Assembled Film Based on Colloidal Tungsten Trioxide and a Dinuclear Ru(II) Complex

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Abstract:

An electrostatic self-assembled film based on a tungstic acid colloidal solution and a dinuclear Ru(II) complex [(bpy)2Ru(bpbh)Ru(bpy)2](ClO4)4 [where bpy = 2,2′-bipyrizine and bpbh = 1,6-bis-(2-(2-pyridyl)benzimidazoyl)hexane] has been prepared and characterized by means of ultraviolet-visible absorption and emission spectroscopy and cyclic voltammetry. The photoelectrochemical properties of the films have also been studied. A large anodic photocurrent of 0.8 A/cm2 was observed when a monolayer film of ITO/WO3/the Ru complex was irradiated with polychromatic light (730 nm >  > 325 nm) at a positive applied potential of 0.6 V versus a saturated calomel electrode, four-fold that observed under the same experimental condition for the ITO electrode covered with only a monolayer of WO3 without the Ru(II) complex, indicating that the the anodic photocurrent mainly arose from the electron injection from the photoexcited Ru(II) complex to the conduction band of WO3.

Keywords: PHOTOELECTRIC PROPERTY; RUTHENIUM; SELF-ASSEMBLED FILM; TUNGSTEN OXIDE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2136

Publication date: March 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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