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Functionalized Metallic Carbon Nanotube Devices for pH Sensing
Author(s) -
Maroto Alicia,
Balasubramanian Kannan,
Burghard Marko,
Kern Klaus
Publication year - 2007
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600498
Subject(s) - carbon nanotube , protonation , metal , nanotube , nanotechnology , materials science , covalent bond , biosensor , chemistry , chemical physics , organic chemistry , ion , metallurgy
A pH sensor based upon gentle covalent modification of individual metallic single‐wall carbon nanotubes is demonstrated. The sensing mechanism relies upon the protonation‐dependent charge carrier scattering (see figure) by N , N ‐diethylaniline moieties anchored to the tube sidewall. This novel approach holds promise to extend the accessible range of nanotube‐based (bio)chemical sensors.