The emission probability of π electrons at the local emission region containing a single carbon atom in capped C(5,5) single-walled carbon nanotubes is investigated from electronic and geometrical effects. Owing to electronic effects, the sequence of magnitude of emission probability of π electrons from various local emission regions at the tip is in descending order of T4 (the link region between the tip and the body), T2 and T3 (the middle regions), T1 (the top region), while that at the body is close to 0 due to geometrical effects. The fluctuation in the emission probabilities of π electrons implies that the total energy distribution of emitted electrons at the tip and the image luminescence from the tip are not uniform in essence. Different from electronic effects, geometrical effects are only crucial to the field emission property, and have less influence on the emission probability of π electrons for capped carbon nanotubes.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)