Tuning chirality of single-wall carbon nanotubes by selective etching with carbon dioxide.
CO2 molecule chemisorbs selectively on the zigzag tube edge without an activation barrier, whereas it physisorbs on the armchair edge of nanotubes. In addition, carbon nanotubes can be etched by an adsorbed oxygen atom of CO2 molecule. From our results, we suggest a selective etching mechanism for tuning the chirality of the mass-produced carbon nanotubes.
Seo
Kwanyong
K
Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
Kim
Changwook
C
Choi
Yong Soo
YS
Park
Kyung Ah
KA
Lee
Young Hee
YH
Kim
Bongsoo
B