Microscopic and spectroscopic investigation of poly(3-hexylthiophene) interaction with carbon nanotubes
Giulianini, Michele, Waclawik, Eric R., Scarselli, Manuela, Castrucci, Paola, De Crescenzi, Maurizio, Bell, John M., & Motta, Nunzio (2011) Microscopic and spectroscopic investigation of poly(3-hexylthiophene) interaction with carbon nanotubes. Polymers, 3, pp. 1433-1446.
The inclusion of carbon nanotubes in polymer matrix has been proposed to enhance the polymer’s physical and electrical properties. In this study, microscopic
and spectroscopic techniques are used to investigate the interaction between poly(3-hexylthiophene) (P3HT) and nanotubes and the reciprocal modification of physical
properties. The presence of P3HT-covered nanotubes dispersed in the polymer matrix has been observed by atomic force microscopy and transmission electron microscopy. Then,
the modification of P3HT optical properties due to nanotube inclusion has been evidenced with spectroscopic techniques like absorption and Raman spectroscopy. The study is
completed with detailed nanoscale analysis by scanning probe techniques. The ordered self assembly of polymer adhering on the nanotube is unveiled by showing an example of helical wrapping of P3HT. Scanning tunneling spectroscopy study provides information on the electronic structure of nanotube-polymer assembly, revealing the charge transfer from P3HT to the nanotube.
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