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Functionalized Carbon Nanotubes for Molecular Hydrogen Sensors
Author(s) -
Kong J.,
Chapline M. G.,
Dai H.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200109)13:18<1384::aid-adma1384>3.0.co;2-8
Subject(s) - materials science , carbon nanotube , surface modification , nanotechnology , hydrogen , conductivity , coating , carbon fibers , palladium , chemical engineering , composite material , composite number , catalysis , organic chemistry , chemistry , engineering
Excellent sensors for molecular hydrogen ,to be used, e.g., for leakage control in H 2 ‐based energy sources, are fabricated by functionalization of single‐walled carbon nanotubes (SWNTs) with a non‐continuous coating of palladium. These sensors, with large electrical conductivity modulation in the presence of small H 2 concentrations in air, show fast response and high sensitivity even at room temperature. The Figure presents an AFM image of a Pd‐coated SWNT.