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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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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 μA/cm2 was observed when a monolayer film of ITO/WO3/the Ru complex was irradiated with polychromatic light (730 nm > λ > 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.
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Keywords: PHOTOELECTRIC PROPERTY; RUTHENIUM; SELF-ASSEMBLED FILM; TUNGSTEN OXIDE

Document Type: Research Article

Publication date: 01 March 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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