Raman Characterization and Polarity Tuning of Aligned Single-Walled Carbon Nanotubes on Quartz
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概要
- 論文の詳細を見る
Raman characterization has been employed to study key features of highly aligned single-walled carbon nanotubes grown on quartz substrates. The nanotubes are observed to possess an estimated metallic/semiconducting ratio of $1:2.7$, and Raman spectra also confirm the high integrity of nanotubes before and after being transferred from quartz to Si/SiO2 substrates. Based on the as-grown and the transferred aligned nanotubes, we have further fabricated top- and back-gated nanotube devices, respectively. The top-gated transistors exhibit ambipolar transport characteristics with high transconductance, small subthreshold swing of 110 mV/decade and on/off ratio of $10^{7}$, while the back-gated transistors show unipolar p-type characteristics. Furthermore, we have demonstrated polarity tuning to produce both predominately n- and p-type top-gated carbon nanotube transistors by controlling the polarity of gate voltage during electrical breakdown, which has great potential for building complementary carbon nanotube circuits.
- 2010-02-25
著者
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Lei Bo
Department Of Electrical Engineering National Sun Yat-sen University
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Roy Gordon
Department of Chemistry and Chemical Biology Cambridge, Harvard University, Cambridge, MA 02138, U.S.A.
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Kang L.
Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 94035, U.S.A.
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Song Han
Department of Electrical Engineering, University of California at Los Angeles, Los Angeles, CA 94035, U.S.A.
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Koungmin Ryu
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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Ryu Koungmin
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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De-Arco Lewis
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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Alexander Badmaev
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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Damon Farmer
Department of Chemistry and Chemical Biology Cambridge, Harvard University, Cambridge, MA 02138, U.S.A.
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Kevin Kim
Department of Chemistry and Chemical Biology Cambridge, Harvard University, Cambridge, MA 02138, U.S.A.
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Chongwu Zhou
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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Alexander Badmaev
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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Chongwu Zhou
Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, CA 90089, U.S.A.
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