Influence of O2 and N2 on the conductivity of carbon nanotube networks

Details Influence of O2 and N2 on the conductivity of carbon nanotube networks Influence of O2 and N2 on the conductivity of carbon nanotube networks

2010-01-14

arxiv.org/abs/1001.2498v1

Phys. Rev. B. 79, 195431 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures, 1 table

Scientific paper

10.1103/PhysRevB.79.195431

We have performed experiments on single-wall carbon nanotube (SWNT) networks and compared with density-functional theory (DFT) calculations to identify the microscopic origin of the observed sensitivity of the network conductivity to physisorbed O2 and N2. Previous DFT calculations of the transmission function for isolated pristine SWNTs have found physisorbed molecules have little influence on their conductivity. However, by calculating the four-terminal transmission function of crossed SWNT junctions, we show that physisorbed O2 and N2 do affect the junction's conductance. This may be understood as an increase in tunneling probability due to hopping via molecular orbitals. We find the effect is substantially larger for O2 than for N2, and for semiconducting rather than metallic SWNTs junctions, in agreement with experiment.

Affiliated with

Also associated with

No associations

Rating

Influence of O2 and N2 on the conductivity of carbon nanotube networks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Influence of O2 and N2 on the conductivity of carbon nanotube networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of O2 and N2 on the conductivity of carbon nanotube networks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-568421