| Effects of the local environment on CNT-based nanoelectronics: development of a microenvironment probe station. | |
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MedLine Citation:
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PMID: 21137875 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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In this study, we report the development of a microenvironment probe station capable of detecting the effect of small changes to the local environment around a carbon nanotube conduction channel. The microenvironment probe station is highly versatile and is used to characterize alterations in carbon nanotube field effect transistor electrical behavior in response to changes in temperature, gas species, infrared and ultraviolet light. All devices were electrically characterized in atmospheric, ultrahigh vacuum and oxygen-rich environments. The results suggest that devices could be changed from n-type at 1 x 10(-8) torr through an intermediate ambipolar state at 1 x 10(-4) torr to p-type at atmosphere solely by increasing the oxygen concentration. The average resistance of these carbon nanotube field effect transistors after annealing was observed to decrease by approximately 54% from their initial value under ultrahigh vacuum to their final value in the presence of pure oxygen while corresponding threshold voltages shifts were also observed. Illumination with infrared light resulted in a approximately 10% increase in drain current with an estimated response time <1 fs due to photon-induced electron-hole pair generation. Illumination with ultraviolet light resulted in approximately 5-15% reduction in drain current due to photon-induced desorption of oxygen adsorbate. |
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Authors:
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Devon McClain; Nicole Thomas; Tri Nguyen; Kevin P O'Brien; Jun Jiao |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of nanoscience and nanotechnology Volume: 10 ISSN: 1533-4880 ISO Abbreviation: J Nanosci Nanotechnol Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-12-08 Completed Date: 2010-12-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088195 Medline TA: J Nanosci Nanotechnol Country: United States |
Other Details:
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Languages: eng Pagination: 7108-12 Citation Subset: - |
Affiliation:
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Department of Physics, Portland State University, Portland, Oregon 97207-0751, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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