Journal
THIN SOLID FILMS
Volume 518, Issue 8, Pages 2200-2205Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2009.09.052
Keywords
Layer-by-layer; Surface plasmon; Carbon nanotubes; Composites; Cyclic voltammetry; Multilayered ultrathin film
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Funding
- Japan Society for the Promotion of Science
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In this report, we demonstrate a convenient method of fabricating single-walled carbon nanotubes/organic semiconductor hybrid ultrathin multilayers using a layer-by-layer self-assembly approach. Single-walled carbon nanotubes were solubilized by water-soluble cationic alcian blue pyridine variant and anionic copper phthalocyanine-3,4',4 '',4'''-tetrasulfonic acid tetrasodium salt, which were then utilized for electrostatic layer-by-layer multilayer fabrication. The solubilization ability of single-walled carbon nanotubes was studied in water by UV-vis absorption spectroscopy. The composites were highly dispersed owing to the pi-pi interactions. In situ surface plasmon resonance spectroscopy during the layer-by-layer multilayer fabrication indicated a stepwise increase in reflectivity, indicating the successive formation of nanostructured hybrid ultrathin films. Cyclic voltammetry revealed that the electroactivity of the hybrid film was enhanced by the incorporation of single-walled nanotubes. (C) 2009 Elsevier B.V. All rights reserved.
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