Microscopic and Spectroscopic Study of Self-Ordering in Poly(3-hexylthiophene)/Carbon Nanotubes Nanocomposites
| Autor: | John Bell, Nunzio Motta, Eric R. Waclawik, Roland G. S. Goh |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Nanotube
Materials science Macromolecular Substances Surface Properties Molecular Conformation Biomedical Engineering Bioengineering Thiophenes Carbon nanotube Mass Spectrometry law.invention chemistry.chemical_compound symbols.namesake law Materials Testing Polymer chemistry Thiophene Nanotechnology General Materials Science Pyrolytic carbon Particle Size Conductive polymer Nanocomposite Nanotubes Carbon General Chemistry Condensed Matter Physics Microscopy Electron chemistry Chemical engineering symbols Scanning tunneling microscope Crystallization Raman spectroscopy |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 6:3929-3933 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2006.678 |
| Popis: | Poly(3-hexylthiophene)-single-walled carbon nanotubes (SWNTs) composites were studied using UV-visible absorbance and Raman spectroscopy, scanning tunneling microscopy (STM) and transmission electron microscopy (TEM). Monolayers of regioregular poly(3-hexyl thiophene) (rrP3HT) adsorbed on SWNTs have been imaged using scanning tunneling microscopy (STM) to obtain measurements of the chiral angles at which the thiophene polymer chains wrap around individual carbon nanotubes (41-48 degrees with respect to nanotube axis) and polymer interchain spacings (1.68 angstroms). The rrP3HT interchain distance is greater for rrP3HT monolayers adsorbed onto the curved surfaces of SWNTs than on the flat surfaces of highly ordered pyrolytic graphite samples (1.4 angstroms). UV-vis spectroscopic data provided strong evidence for increased interchain interactions in composites of rrP3HT and SWNTs compared to the pure polymer. The STM local-probe studies of the native polymer and the composites further confirmed that the rrP3HT interacts with carbon nanotubes to produce a highly ordered material at the molecular level. |
| Databáze: | OpenAIRE |
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