TY - JOUR
T1 - Guided growth of horizontal single-wall carbon nanotubes on M-plane sapphire
AU - Shadmi, Nitzan
AU - Sanders, Ella
AU - Wachtel, Ellen
AU - Joselevich, Ernesto
N1 - We thank D. Tsivion and E. Oksenberg for helpful discussions. This research was supported by the Israel Science Foundation, the Kimmel Center for Nanoscale Science, the Moskowitz Center for Nano and Bio-Nano Imaging, and the Perlman Family Foundation. E.J. holds the Drake Family Professorial Chair in Nanotechnology.
PY - 2015/4/16
Y1 - 2015/4/16
N2 - The alignment of carbon nanotubes has been the subject of extensive research. Among the different alignment methods, surface alignment, such as alignment along favorable directions on the anisotropic surface of single-crystal substrates, including sapphire and quartz, has stood out as very effective and robust. Recently, this method was shown to also be highly effective for the guided growth of semiconducting nanowires. Interestingly, while the same directions of alignment were found for the growth of nanotubes and nanowires on R-plane (11Ì...02) and A-plane (112Ì...0) sapphire (α-Al2O3), nanotubes, unlike nanowires, have been reported not to align on M-plane (101Ì...0) sapphire. Here we report the alignment of carbon nanotubes on M-plane sapphire, as well as on the annealed M-plane, which is periodically faceted, in directions that match the directions reported for aligned nanowires. We go on to discuss a possible common alignment mechanism for nanowires and nanotubes on sapphire surfaces.
AB - The alignment of carbon nanotubes has been the subject of extensive research. Among the different alignment methods, surface alignment, such as alignment along favorable directions on the anisotropic surface of single-crystal substrates, including sapphire and quartz, has stood out as very effective and robust. Recently, this method was shown to also be highly effective for the guided growth of semiconducting nanowires. Interestingly, while the same directions of alignment were found for the growth of nanotubes and nanowires on R-plane (11Ì...02) and A-plane (112Ì...0) sapphire (α-Al2O3), nanotubes, unlike nanowires, have been reported not to align on M-plane (101Ì...0) sapphire. Here we report the alignment of carbon nanotubes on M-plane sapphire, as well as on the annealed M-plane, which is periodically faceted, in directions that match the directions reported for aligned nanowires. We go on to discuss a possible common alignment mechanism for nanowires and nanotubes on sapphire surfaces.
UR - http://www.scopus.com/inward/record.url?scp=84928027875&partnerID=8YFLogxK
U2 - https://doi.org/10.1021/acs.jpcc.5b01162
DO - https://doi.org/10.1021/acs.jpcc.5b01162
M3 - مقالة
SN - 1932-7447
VL - 119
SP - 8382
EP - 8387
JO - Journal of Physical chemistry c
JF - Journal of Physical chemistry c
IS - 15
ER -