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Electrochemically modified single‐walled carbon nanotubes
Author(s) -
Burghard M.,
Maroto A.,
Balasubramanian K.,
Assmus T.,
FormentAliaga A.,
Lee E. J. H.,
Weitz R. T.,
Scolari M.,
Nan F.,
Mews A.,
Kern K.
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.200776102
Subject(s) - carbon nanotube , covalent bond , materials science , nanoscopic scale , raman spectroscopy , nanotechnology , nanoparticle , metal , colloidal gold , noble metal , layer (electronics) , chemical engineering , chemistry , organic chemistry , metallurgy , physics , engineering , optics
We report on the properties of electrochemically modified SWCNTs bearing a functional organic layer and a low density of noble metal nanoparticles, respectively. First, a novel approach to nanoscale pH sensors is demonstrated which involves the gentle modification of individual metallic tubes via covalent attachment of amino‐substituted phenyl groups. Furthermore, gold particles with sizes of a few tens of nanometres deposited onto individual SWCNTs were found to locally enhance the Raman signals of the underlying nanotube. The enhancement imparted by individual gold particles was estimated to be two orders of magnitude. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)