Toward Practical Non-Contact Optical Strain Sensing Using Single-Walled Carbon Nanotubes

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dc.citation.firstpageM3012en_US
dc.citation.issueNumber8en_US
dc.citation.journalTitleECS Journal of Solid State Science and Technologyen_US
dc.citation.lastpageM3017en_US
dc.citation.volumeNumber5en_US
dc.contributor.authorSun, Pengen_US
dc.contributor.authorBachilo, Sergei M.en_US
dc.contributor.authorNagarajaiah, Satishen_US
dc.contributor.authorWeisman, R. Bruceen_US
dc.date.accessioned2017-03-07T18:24:16Zen_US
dc.date.available2017-03-07T18:24:16Zen_US
dc.date.issued2016en_US
dc.description.abstractProgress is reported in an emerging non-contact strain sensing technology based on optical properties of single-walled carbon nanotubes (SWCNTs). In this strain-sensing smart skin (“S4”) method, nanotubes are dilutely embedded in a thin polymer film applied to a substrate of interest. Subsequent strain in the substrate is transferred to the nanotubes, causing systematic spectral shifts in their characteristic short-wave infrared fluorescence peaks. A small diode laser excites a spot on the coated surface, and the resulting emission is captured and spectrally analyzed to deduce local strain. To advance performance of the method, we prepare S4 films with structurally selected SWCNTs. These give less congested emission spectra that can be analyzed precisely. However, quenching interactions with the polymer host reduce SWCNT emission intensity by an order of magnitude. The instrumentation that captures SWCNT fluorescence has been made lighter and smaller for hand-held use or mounting onto a positioning mechanism that makes efficient automated strain scans of laboratory test specimens. Statistical analysis of large S4 data sets exposes uncertainties in measurements at single positions plus spatial variations in deduced baseline strain levels. Future refinements to S4 film formulation and processing should provide improved strain sensing performance suitable for industrial application.en_US
dc.identifier.citationSun, Peng, Bachilo, Sergei M., Nagarajaiah, Satish, et al.. "Toward Practical Non-Contact Optical Strain Sensing Using Single-Walled Carbon Nanotubes." <i>ECS Journal of Solid State Science and Technology,</i> 5, no. 8 (2016) The Electrochemical Society: M3012-M3017. http://dx.doi.org/10.1149/2.0031608jss.en_US
dc.identifier.doihttp://dx.doi.org/10.1149/2.0031608jssen_US
dc.identifier.urihttps://hdl.handle.net/1911/94026en_US
dc.language.isoengen_US
dc.publisherThe Electrochemical Societyen_US
dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited.en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.subject.keywordnanocompositesen_US
dc.subject.keywordshort-wave infrared fluorescenceen_US
dc.subject.keywordstrain mappingen_US
dc.subject.keywordstructural health monitoringen_US
dc.subject.keywordSWCNTen_US
dc.titleToward Practical Non-Contact Optical Strain Sensing Using Single-Walled Carbon Nanotubesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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