Premium
Electrochemical functionalization of SWNT bundles in acid and salt media as observed by Raman and X‐ray photoelectron spectroscopy
Author(s) -
Rafailov Peter M.,
Thomsen Christian,
Monev Milko,
DettlaffWeglikowska Urszula,
Roth Siegmar
Publication year - 2008
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.200879569
Subject(s) - x ray photoelectron spectroscopy , surface modification , raman spectroscopy , electrochemistry , conductivity , materials science , carbon nanotube , buckypaper , covalent bond , chemical engineering , analytical chemistry (journal) , chemistry , nanotechnology , electrode , organic chemistry , physics , optics , engineering
We carried out electrochemical functionalization of single‐walled carbon nanotube mats (buckypaper) in HCl and KCl aqueous solutions by exposing them to electrochemical potentials above the Cl – oxidation potential and high Faradaic currents. Formation of C‐Cl covalent bonds was established by X‐ray Photoelectron Spectroscopy (XPS). Combining results from Raman, XPS and conductivity measurements, we find a significantly higher degree of covalent functionalization in the HCl solution as compared to the KCl one. We also discuss the impact of electrochemical doping and functionalization on the morphology and the conductivity of the SWNT sample. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)