Open AccessRaman scattering study of iodine intercalated bundles of single-wall carbon nanotubes
Author(s) -
Van Minh Nguyen,
Sung Jin Kim,
In Sang Yang
Publication year - 2011
Publication title -
advances in natural sciences nanoscience and nanotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.476
H-Index - 40
ISSN - 2043-6262
DOI - 10.1088/2043-6262/2/2/025006
Subject(s) - carbon nanotube , intercalation (chemistry) , raman spectroscopy , materials science , raman scattering , optical properties of carbon nanotubes , field electron emission , nanotechnology , molecule , nanotube , inorganic chemistry , electron , chemistry , optics , organic chemistry , physics , quantum mechanics
We present the results of Raman and field emission studies of the structural and physical features of iodine intercalated bundles of single-walled carbon nanotubes (SWNTs). The periodicity of hexagonally closest-packed pristine nanotubes was destroyed by the intercalation of iodine molecules in interstitial sites of carbon nanotube bundles. The Raman spectra obtained using a 647.1 nm line of Kr-ion laser indicate that I 2 intercalation does affect the electronic state of metallic SWNTs of small diameters of ∼1.26 nm changing into the insulating state. The turn-on electric fields obtained from the I – V measurements for iodine intercalated SWNTs and pristine SWNTs were 2.43 and 3.41 V μ m −1 , respectively, and iodine intercalated SWNTs show higher field emission than pristine SWNTs do.