Guided growth of horizontal single-wall carbon nanotubes on M-plane sapphire

Nitzan Shadmi; Ella Sanders; Ellen Wachtel; Ernesto Joselevich

doi:10.1021/acs.jpcc.5b01162

Guided growth of horizontal single-wall carbon nanotubes on M-plane sapphire

Nitzan Shadmi, Ella Sanders, Ellen Wachtel, Ernesto Joselevich^*

^*Corresponding author for this work

Department of Molecular Chemistry and Materials Science Perlman

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	8382-8387
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	119
Issue number	15
DOIs	https://doi.org/10.1021/acs.jpcc.5b01162
Publication status	Published - 16 Apr 2015

Funding

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.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Energy
Surfaces, Coatings and Films
Physical and Theoretical Chemistry

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title = "Guided growth of horizontal single-wall carbon nanotubes on M-plane sapphire",

abstract = "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 (11{\`I}...02) and A-plane (112{\`I}...0) sapphire (α-Al2O3), nanotubes, unlike nanowires, have been reported not to align on M-plane (101{\`I}...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.",

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Guided growth of horizontal single-wall carbon nanotubes on M-plane sapphire

Abstract

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All Science Journal Classification (ASJC) codes

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