Anisotropic Electronic Conductivity in Layer-By-Layer Composite Film Composed of Water-Soluble Conjugated Polymers and SWNTs
✍ Scribed by Naoya Adachi; Tadashi Fukawa; Yoko Tatewaki; Hirofusa Shirai; Mutsumi Kimura
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 337 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
This paper reports the anisotropic electrical properties of a layer‐by‐layer (LBL) film composed of water‐soluble conjugated polymers and single‐walled carbon nanotubes (SWNTs). The water‐soluble poly (p‐phenylene ethynylene)s (PPEs) are capable of a strong π‐π interaction with the sidewall of SWNTs and results in a very stable PPE‐SO~3~/SWNTs composite in aqueous solution. Aligned LBL films were prepared by self‐assembly using the anionic PPE/SWNTs and cationic PPE on various substrates. The polarized Raman spectra exhibited the cos^2^α polarization dependence of the G‐band intensity between the polarization direction and the SWNTs alignment direction. The electric conductivity within the LBL films can be controlled by the deposition direction in the LBL formation.
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