5 research outputs found
Adsorption of Oxygen Molecules on Individual Carbon Single-walled Nanotubes
Our study of the adsorption of oxygen molecules on individual semiconductiong
single-walled carbon nanotubes at ambient conditions reveals that the
adsorption is physisorption, that the resistance without O2 increases by ~two
orders of magnitude as compared to that with O2, and that the sensitive
response is due to the pinning of the Fermi level near the top of the valence
band of the tube resulting from impurity states of O2 appearing above the
valence band.Comment: 16 pages, 4 figure