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https://hdl.handle.net/10356/94181
Title: | A tunable photosensor | Authors: | Zhao, Yanli Hu, Liangbing Grüner, George Stoddart, J. Fraser |
Keywords: | DRNTU::Science::Physics::Optics and light | Issue Date: | 2008 | Source: | Zhao, Y. L., Hu, L., Grüner, G., & Stoddart, J. F. (2008). A Tunable Photosensor. Journal of the American Chemical Society, 130(50), 16996-17003. | Series/Report no.: | Journal of the American chemical society | 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. | URI: | https://hdl.handle.net/10356/94181 http://hdl.handle.net/10220/7057 |
ISSN: | 0002-7863 | DOI: | 10.1021/ja805393b | Schools: | School of Physical and Mathematical Sciences | Rights: | © 2008 American Chemical Society | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | SPMS Journal Articles |
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