Revealing the adsorption mechanisms of nitroxides on ultrapure, metallicity-sorted carbon nanotubes.

ABSTRACT: Carbon nanotubes are a natural choice as gas sensor components given their high surface to volume ratio, electronic properties, and capability to mediate chemical reactions. However, a realistic assessment of the interaction of the tube wall and the adsorption processes during gas phase reactions has always been elusive. Making use of ultraclean single-walled carbon nanotubes, we have followed the adsorption kinetics of NO2 and found a physisorption mechanism. Additionally, the adsorption reaction directly depends on the metallic character of the samples. Franck-Condon satellites, hitherto undetected in nanotube-NOx systems, were resolved in the N 1s X-ray absorption signal, revealing a weak chemisorption, which is intrinsically related to NO dimer molecules. This has allowed us to identif

SUBMITTER: Ruiz-Soria G 

PROVIDER: S-EPMC3936481 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature