Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5443086 | Optical Materials | 2016 | 8 Pages |
Abstract
Optical properties are reported for composites based on single-walled carbon nanotubes (SWNTs) and copolymer poly(3,4-ethylenedioxythiophene-co-pyrene) (PEDOT-Py) prepared by chemical polymerization of two monomers in the presence of carbon nanotubes. A charge transfer between SWNTs and the PEDOT-Py copolymer was demonstrated by Raman scattering. The increase in the relative intensity of the Raman lines peaked at 440-577Â cmâ1, which were assigned to the ethylenedioxy ring vibrational modes, indicated a significant hindrance steric in the case of the composites based on the PEDOT-Py copolymer and metallic SWNTs. The increase in the absorbance of IR band peaked at 984Â cmâ1 occurred simultaneously with the disappearance of the IR band at 1639Â cmâ1. This finding was a consequence of the formation of new covalent bonds between SWNTs and the thiophene and benzene rings of the repeating units of the PEDOT-Py copolymer. The photoluminescence (PL) quenching process of the PEDOT-Py copolymer was induced by semiconducting SWNTs. The PL quenching of PEDOT-Py copolymer in the presence of SWNTs was demonstrated based on the energy level diagrams of the two constituents of the PEDOT-Py/SWNTs composite material.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
I. Baltog, M. Baibarac, I. Smaranda, A. Matea, M. Ilie, J.Y. Mevellec, S. Lefrant,