Photoelectrochemical reactions of electrodes modified with composites between conjugated polymer or ruthenium complex and single-walled carbon nanotubes |
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Authors: | Hiroaki Yonemura Yuuichi Yamamoto Sunao Yamada |
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Affiliation: | Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan |
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Abstract: | Composite materials between conjugated polymer; poly2-methoxy-5-(2'-ethylhexyloxy)-1.4-phenylene vinylene] (MEHPPV), or ruthenium(II)-tris(2,2'-bipyridine) (Ru(bpy)32+)-poly(sodium 4-styrenesulfonate) (PSS) complex and single-walled carbon nanotubes (SWNTs) were fabricated using polymer wrapping method. Formation of SWNT/MEHPPV or SWNT/PSS/Ru(bpy)32+ composite was confirmed by absorption and fluorescence spectra, and AFM images. Electrode modified with SWNT/MEHPPV or SWNT/PSS/Ru(bpy)32+ composite was prepared by casting from DMF solution of SWNT/MEHPPV or aqueous solution of SWNT/PSS/Ru(bpy)32+. The electrode modified with SWNT/MEHPPV or SWNT/PSS/Ru(bpy)32+ composite showed photocurrent response due to photoexcitation of MEHPPV or Ru(bpy)32+. The photocurrents are ascribed to photoinduced electron-transfer reaction from excited state of MEHPPV or Ru(bpy)32+ to SWNT. |
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Keywords: | Single-walled carbon nanotube Conjugated polymer Ruthenium complex Photoelectrochemical reaction |
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