Single-wall carbon nanotube interaction with gases: sample contaminants and environmental monitoring.
Here, we show that residual contaminants in purified single-wall carbon nanotube bundles may be responsible for the reported sensitivity of the electronic and transport properties to oxygen. Removal of these contaminants makes the electronic spectra insensitive to O(2), CO, H(2)O, and N(2), while a strong sensitivity to NO(2), SO(2), and NH(3) is observed, confirming the possible application of single-wall nanotubes as powerful sensors capable of measuring environmentally significant levels of toxic gases.
Goldoni
Andrea
A
Sincrotrone Trieste, S. S. 14, Km. 163,5, 34012 Trieste, Italy. goldonia@elettra.trieste.it
Larciprete
Rosanna
R
Petaccia
Luca
L
Lizzit
Silvano
S