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dc.contributor.authorLee, Kuang-Lien_US
dc.contributor.authorTsai, Po-Chengen_US
dc.contributor.authorYou, Meng-Linen_US
dc.contributor.authorPan, Ming-Yangen_US
dc.contributor.authorShi, Xuen_US
dc.contributor.authorUeno, Koseien_US
dc.contributor.authorMisawa, Hiroakien_US
dc.contributor.authorWei, Pei-Kuenen_US
dc.date.accessioned2019-04-03T06:41:32Z-
dc.date.available2019-04-03T06:41:32Z-
dc.date.issued2017-10-01en_US
dc.identifier.issn2470-1343en_US
dc.identifier.urihttp://dx.doi.org/10.1021/acsomega.7b01349en_US
dc.identifier.urihttp://hdl.handle.net/11536/147862-
dc.description.abstractThe studies of nanostructure-based aluminum sensors have attracted huge attention because aluminum is a more cost-effective plasmonic material. However, the intrinsic properties of the aluminum metal, having a large imaginary part of the dielectric function and a longer electromagnetic field decay length and problems of poor long-term chemical stability, limit the surface-sensing capability and applicability of nanostructures. We propose the combination of capped aluminum nanoslits and a thin-capped dielectric layer to overcome these limitations. We show that the dielectric layer can positively enhance the wavelength sensitivities of the Wood's anomaly-dominant resonance and asymmetric Fano resonance in capped aluminum nanoslits. The maximum improvement can be reached by a factor of 3.5. Besides, there is an optimal layer thickness for the surface sensitivity because of the trade-off relationship between the refractive index sensitivity and decay length. We attribute the enhanced surface sensitivity to a reduced evanescent length, which is confirmed by the finite difference time-domain calculations. The protein-protein interaction experiments verify the high-surface sensitivity of the structures, and a limit of quantification (LOQ) of 1 pg/mL antibovine serum albumin is achieved. Such low-cost, highly sensitive aluminum-based nanostructures can benefit various sensing applications.en_US
dc.language.isoen_USen_US
dc.titleEnhancing Surface Sensitivity of Nanostructure-Based Aluminum Sensors Using Capped Dielectric Layersen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/acsomega.7b01349en_US
dc.identifier.journalACS OMEGAen_US
dc.citation.volume2en_US
dc.citation.issue10en_US
dc.citation.spage7461en_US
dc.citation.epage7470en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000418744000122en_US
dc.citation.woscount3en_US
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