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A tunable photosensor

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A tunable photosensor

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dc.contributor.author Zhao, Yanli
dc.contributor.author Hu, Liangbing
dc.contributor.author Grüner, George
dc.contributor.author Stoddart, J. Fraser
dc.date.accessioned 2011-09-15T00:55:12Z
dc.date.available 2011-09-15T00:55:12Z
dc.date.copyright 2008
dc.date.issued 2011-09-15
dc.identifier.citation Zhao, Y. L., Hu, L., Grüner, G., & Stoddart, J. F. (2008). A Tunable Photosensor. Journal of the American Chemical Society, 130(50), 16996-17003.
dc.identifier.issn 0002-7863
dc.identifier.uri http://hdl.handle.net/10220/7057
dc.description.abstract A pyrene-modified β-cyclodextrin (pyrenecyclodextrin)-decorated single-walled carbon nanotube (SWNT) field-effect transistor (FET) device was fabricated, which can serve as a tunable photosensor to sense a fluorescent adamantyl-modified Ru complex (ADA−Ru). When the light is on (I = 40 W m−2 and λ = 280 nm), the transfer curve of the pyrenecyclodextrin-SWNT/FET device shifts toward a negative gate voltage by about 1.6 V and its sheet resistance increases quickly, indicating a charge-transfer process from the pyrenecyclodextrins to the SWNTs. In contrast, the transfer curve of the pyrenecyclodextrin-SWNT/FET device in the presence of the ADA−Ru complex shifts toward a positive gate voltage by about 1.9 V and its sheet resistance decreases slowly when the light is on (I = 40 W m−2 and λ = 490 nm), showing a charge-transfer process from the pyrenecyclodextrin-SWNT hybrids to the ADA−Ru complex. Because these photoresponse processes are recoverable following the removal of the light, the present photosensor exhibits a promising application in the area of tunable light detection.
dc.format.extent 8 p.
dc.language.iso en
dc.relation.ispartofseries Journal of the American chemical society
dc.rights © 2008 American Chemical Society
dc.subject DRNTU::Science::Physics::Optics and light.
dc.title A tunable photosensor
dc.type Journal Article
dc.contributor.school School of Physical and Mathematical Sciences
dc.identifier.doi http://dx.doi.org/10.1021/ja805393b
dc.identifier.rims 159742

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