| Large signal operation of small band-gap carbon nanotube-based ambipolar transistor: a high-performance frequency doubler. | |
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MedLine Citation:
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PMID: 20677775 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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A small band-gap carbon nanotube (SBG CNT) with a large diameter of 4 nm has been used to fabricate ambipolar field-effect transistors (FETs) with ultrahigh carrier mobility of more than 18 300 and 8300 cm(2)/V x s for holes and electrons, respectively. Using a top-gate device geometry with 12 nm HfO(2) being the gate oxide, the SBG CNT-based FET exhibits an almost perfect symmetric ambipolar transfer characteristic without any noticeable hysteresis, and a highly efficient frequency doubler is constructed based on this near perfect ambipolar FET. The SBG CNT-based frequency doubler is shown to be able to operate in a large signal mode where the input AC signal, being applied to the top-gate electrode, drives the FET operating alternatively in a p- or n-region yielding an output signal at the drain electrode with doubled frequency and high conversion efficiency. For an input AC signal of 1 kHz, detailed frequency power spectrum analysis shows that more than 95% of the output signal is concentrated at the doubled frequency at 2 kHz, with a gain of more than 0.15, and this represents the highest gain so far achieved in carbon-based devices, including graphene-based devices. |
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Authors:
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Zhenxing Wang; Li Ding; Tian Pei; Zhiyong Zhang; Sheng Wang; Tao Yu; Xiaofei Ye; Fei Peng; Yan Li; Lian-Mao Peng |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Nano letters Volume: 10 ISSN: 1530-6992 ISO Abbreviation: Nano Lett. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-08 Completed Date: 2011-01-04 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088070 Medline TA: Nano Lett Country: United States |
Other Details:
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Languages: eng Pagination: 3648-55 Citation Subset: - |
Affiliation:
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Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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