TY - JOUR
T1 - Crystal plane dependent growth of aligned single-walled carbon nanotubes on sapphire
AU - Ishigami, Naoki
AU - Ago, Hiroki
AU - Imamoto, Kenta
AU - Tsuji, Masaharu
AU - Iakoubovskii, Konstantin
AU - Minami, Nobutsugu
PY - 2008/7/30
Y1 - 2008/7/30
N2 - On single-crystal substrates, such as sapphire (α-Al 2O3) and quartz (SiO2), single-walled carbon nanotubes (SWNTs) align along specific crystallographic axes of the crystal, indicating that the SWNT growth is influenced by the crystal surface. Here, we show that not only the orientation, but also the diameter and chirality of SWNTs are affected by the crystal plane of the sapphire substrate. The aligned SWNTs grown on the A- and R-planes of sapphire have narrower diameter distributions than randomly oriented tubes produced on the C-plane sapphire and amorphous SiO2. Photoluminescence measurements reveal a striking difference between the aligned SWNTs: near-zigzag tubes are observed on the A-plane and near-armchair tubes on the R-plane. This study shows the route for the diameter and chirality control of SWNTs by surface atomic arrangements of a single-crystal substrate.
AB - On single-crystal substrates, such as sapphire (α-Al 2O3) and quartz (SiO2), single-walled carbon nanotubes (SWNTs) align along specific crystallographic axes of the crystal, indicating that the SWNT growth is influenced by the crystal surface. Here, we show that not only the orientation, but also the diameter and chirality of SWNTs are affected by the crystal plane of the sapphire substrate. The aligned SWNTs grown on the A- and R-planes of sapphire have narrower diameter distributions than randomly oriented tubes produced on the C-plane sapphire and amorphous SiO2. Photoluminescence measurements reveal a striking difference between the aligned SWNTs: near-zigzag tubes are observed on the A-plane and near-armchair tubes on the R-plane. This study shows the route for the diameter and chirality control of SWNTs by surface atomic arrangements of a single-crystal substrate.
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U2 - 10.1021/ja8024752
DO - 10.1021/ja8024752
M3 - Article
C2 - 18597459
AN - SCOPUS:48249127559
SN - 0002-7863
VL - 130
SP - 9918
EP - 9924
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 30
ER -