Controlled synthesis of a large fraction of metallic single-walled carbon nanotube and semiconducting carbon nanowire networks | Zendy

Zhaojun Han | Zendy; Samuel Yick | Zendy; Igor Levchenko | Zendy; Pui Lam Tam | Zendy; M. M. A. Yajadda | Zendy; Shailesh Kumar | Zendy; Philip Martin | Zendy; S Furman | Zendy; Kostya Ostrikov | Zendy

Open Access

Controlled synthesis of a large fraction of metallic single-walled carbon nanotube and semiconducting carbon nanowire networks

Author(s) -

Zhaojun Han,

Samuel Yick,

Igor Levchenko,

Pui Lam Tam,

M. M. A. Yajadda,

Shailesh Kumar,

Philip Martin,

S Furman,

Kostya Ostrikov

Publication year - 2011

Publication title -

nanoscale

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.038

H-Index - 224

eISSN - 2040-3372

pISSN - 2040-3364

DOI - 10.1039/c1nr10327j

Subject(s) - materials science , carbon nanotube , raman spectroscopy , nanowire , nanotechnology , amorphous carbon , carbon fibers , nanostructure , chemical engineering , conductivity , catalysis , electrical resistivity and conductivity , chirality (physics) , composite material , composite number , chemistry , organic chemistry , physics , electrical engineering , engineering , optics , chiral symmetry breaking , quantum mechanics , quark , nambu–jona lasinio model

Controlled synthesis of both single-walled carbon nanotube and carbon nanowire networks using the same CVD reactor and Fe/Al(2)O(3) catalyst by slightly altering the hydrogenation and temperature conditions is demonstrated. Structural, bonding and electrical characterization using SEM, TEM, Raman spectroscopy, and temperature-dependent resistivity measurements suggest that the nanotubes are of a high quality and a large fraction (well above the common 33% and possibly up to 75%) of them are metallic. On the other hand, the carbon nanowires are amorphous and semiconducting and feature a controlled sp(2)/sp(3) ratio. The growth mechanism which is based on the catalyst nanoisland analysis by AFM and takes into account the hydrogenation and temperature control effects explains the observed switch-over of the nanostructure growth modes. These results are important to achieve the ultimate control of chirality, structure, and conductivity of one-dimensional all-carbon networks.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research