Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening

Abstract Carbon nanotubes (CNTs) are a promising material for high-performance electronics beyond silicon. But unlike silicon, the nature of the transport band gap in CNTs is not fully understood. The transport gap in CNTs is predicted to be strongly driven by electron-electron (e-e) interactions an...

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Autores principales:	Lee Aspitarte, Daniel R. McCulley, Andrea Bertoni, Joshua O. Island, Marvin Ostermann, Massimo Rontani, Gary A. Steele, Ethan D. Minot
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/de24daa75b0240c586ffac825a717848
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spelling	oai:doaj.org-article:de24daa75b0240c586ffac825a7178482021-12-02T12:32:47ZGiant modulation of the electronic band gap of carbon nanotubes by dielectric screening10.1038/s41598-017-09372-12045-2322https://doaj.org/article/de24daa75b0240c586ffac825a7178482017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09372-1https://doaj.org/toc/2045-2322Abstract Carbon nanotubes (CNTs) are a promising material for high-performance electronics beyond silicon. But unlike silicon, the nature of the transport band gap in CNTs is not fully understood. The transport gap in CNTs is predicted to be strongly driven by electron-electron (e-e) interactions and correlations, even at room temperature. Here, we use dielectric liquids to screen e-e interactions in individual suspended ultra-clean CNTs. Using multiple techniques, the transport gap is measured as dielectric screening is increased. Changing the dielectric environment from air to isopropanol, we observe a 25% reduction in the transport gap of semiconducting CNTs, and a 32% reduction in the band gap of narrow-gap CNTs. Additional measurements are reported in dielectric oils. Our results elucidate the nature of the transport gap in CNTs, and show that dielectric environment offers a mechanism for significant control over the transport band gap.Lee AspitarteDaniel R. McCulleyAndrea BertoniJoshua O. IslandMarvin OstermannMassimo RontaniGary A. SteeleEthan D. MinotNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lee Aspitarte Daniel R. McCulley Andrea Bertoni Joshua O. Island Marvin Ostermann Massimo Rontani Gary A. Steele Ethan D. Minot Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
description	Abstract Carbon nanotubes (CNTs) are a promising material for high-performance electronics beyond silicon. But unlike silicon, the nature of the transport band gap in CNTs is not fully understood. The transport gap in CNTs is predicted to be strongly driven by electron-electron (e-e) interactions and correlations, even at room temperature. Here, we use dielectric liquids to screen e-e interactions in individual suspended ultra-clean CNTs. Using multiple techniques, the transport gap is measured as dielectric screening is increased. Changing the dielectric environment from air to isopropanol, we observe a 25% reduction in the transport gap of semiconducting CNTs, and a 32% reduction in the band gap of narrow-gap CNTs. Additional measurements are reported in dielectric oils. Our results elucidate the nature of the transport gap in CNTs, and show that dielectric environment offers a mechanism for significant control over the transport band gap.
format	article
author	Lee Aspitarte Daniel R. McCulley Andrea Bertoni Joshua O. Island Marvin Ostermann Massimo Rontani Gary A. Steele Ethan D. Minot
author_facet	Lee Aspitarte Daniel R. McCulley Andrea Bertoni Joshua O. Island Marvin Ostermann Massimo Rontani Gary A. Steele Ethan D. Minot
author_sort	Lee Aspitarte
title	Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
title_short	Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
title_full	Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
title_fullStr	Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
title_full_unstemmed	Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
title_sort	giant modulation of the electronic band gap of carbon nanotubes by dielectric screening
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/de24daa75b0240c586ffac825a717848
work_keys_str_mv	AT leeaspitarte giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT danielrmcculley giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT andreabertoni giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT joshuaoisland giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT marvinostermann giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT massimorontani giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT garyasteele giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening AT ethandminot giantmodulationoftheelectronicbandgapofcarbonnanotubesbydielectricscreening
_version_	1718394011123712000

Giant modulation of the electronic band gap of carbon nanotubes by dielectric screening

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