Bolometric properties of semiconducting and metallic single-walled carbon nanotube composite films
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Authors
Simmons, Trevor J.
Vera-Reveles, Gustavo
González, Gabriel
Gutiérrez-Hernández, José Manuel
Linhardt, Robert J.
Navarro-Contreras, Hugo
González, Francisco J.
Issue Date
2015-03-18
Type
Article
Language
ENG
Keywords
Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
Alternative Title
Abstract
Single-walled carbon nanotubes (SWNTs) have shown interesting bolometric properties, making them good candidates for the detection of infrared and terahertz radiation. However, little has been reported on the bolometric characteristics of SWNT as a function of their chirality or the possible influence of composite morphology on these properties. The separation of SWNTs based on chirality allows for almost purely semiconductive or metallic SWNTs to be studied. The current study focuses on the bolometric performance of self-assembled composite films of SWNTs. The dependence of these properties on the chirality of the SWNTs was evaluated. To this end, metallic, semiconducting, and a 1:1 mixture of metallic and semiconductive were studied. Also, a theoretical model based on the Wiedemann–Franz law is used to explain the resistance of the SWNT composite films as a function of temperature. Results show that the composite morphology has a significant impact on bolometer performance, with cracked composite films containing highly aligned SWNT arrays suspended over a silicon substrate showing superior responsivity values due to higher thermal isolation. Uncracked composite films showed superior thermal coefficient of resistance values (α = −6.5%/K), however, the responsivity was lower due to lower thermal isolation.
Description
ACS Photonics, 2, 334-340
Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
Full Citation
Bolometric properties of semiconducting and metallic single-walled carbon nanotube composite films, T. Simmons, G. Vera-Reveles, G. González, J. Gutierrez, R. J. Linhardt, H. Navarro-Contreras, F. González, ACS Photonics, 2, 334-340, 2015.
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ISSN
23304022