title: Comment on 'Model calculation of the scanned field enhancement factor of CNTs'.
abstract: The model proposed by Ahmad and Tripathi (2006 Nanotechnology 17 3798) demonstrates that the field enhancement factor of carbon nanotubes (CNTs) reaches a maximum at a certain length. Here, we show that this behavior should not occur and suggest our correction to this model.
authors.affiliation: Department of Mechatronics, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Korea.
authors.forename: A I
authors.initials: AI
authors.lastname: Zhbanov
authors.forename: Yong-Gu
authors.initials: YG
authors.lastname: Lee
authors.forename: E G
authors.initials: EG
authors.lastname: Pogorelov
authors.forename: Yia-Chung
authors.initials: YC
authors.lastname: Chang