Journal
NANO LETTERS
Volume 14, Issue 2, Pages 512-517Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl403515c
Keywords
Single-walled carbon nanotubes; semiconducting; ceria; catalyst supports; selective growth
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Funding
- Ministry of Science and Technology of China [2011CB933003]
- National Natural Science Foundation of China [21125103, 91333105, 11179011]
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The growth of semiconducting single-walled carbon nanotubes (s-SWNTs) on flat substrates is essential for the application of SWNTs in electronic and optoelectronic devices. We developed a flexible strategy to selectively grow s-SWNTs on silicon substrates using a ceria-supported iron or cobalt catalysts. Ceria, which stores active oxygen, plays a crucial role in the selective growth process by inhibiting the formation of metallic SWNTs via oxidation. The so-produced ultralong s-SWNT arrays are immediately ready for building field effect transistors.
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