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Electro‐optical characterization of carbon nanotube‐based coatings under CO 2 laser irradiation
Author(s) -
Castro M. R. S.,
Veith M.,
Oliveira P. W.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200776191
Subject(s) - irradiation , carbon nanotube , materials science , laser , electrical resistivity and conductivity , refractive index , characterization (materials science) , coating , electrical conductor , thin film , carbon fibers , optoelectronics , nanotechnology , composite material , chemical engineering , optics , composite number , physics , electrical engineering , engineering , nuclear physics
Abstract Conductive coatings made from very thin functionalized (–NH 2 ) multi‐walled carbon nanotubes dispersed in a TiO 2 ‐based sol were irradiated with CO 2 laser using different intensities. It was observed that the electrical and optical properties of the film have changed. Laser‐treated films present lower resistivity than the original non‐irradiated coating. We attribute this behavior to a better densification of the nanotubes with the assist of the laser. Films irradiated with CO 2 presented a higher refractive index than non‐irradiated coatings, showing the susceptibility of the films in optic‐electronic devices. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)