Large scale compatible fabrication of gold capped titanium dioxide nanoantennas using a shadowing effect for photoelectrochemical water splitting

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buir.contributor.authorT. Gamze, Ulusoy-Ghobadi
buir.contributor.authorGhobadi, Amir
buir.contributor.authorKaradaş, Ferdi
buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage1531en_US
dc.citation.issueNumber3en_US
dc.citation.spage1521en_US
dc.citation.volumeNumber45en_US
dc.contributor.authorT. Gamze, Ulusoy-Ghobadi
dc.contributor.authorGhobadi, Amir
dc.contributor.authorKaradaş, Ferdi
dc.contributor.authorÖzbay, Ekmel
dc.date.accessioned2021-02-24T07:28:59Z
dc.date.available2021-02-24T07:28:59Z
dc.date.issued2020
dc.departmentDepartment of Chemistryen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractIn this paper, a visible light driven plasmonic based photoelectrochemical water splitting (PEC-WS) cell is designed with an elegant two-step fabrication route. First, titanium dioxide (TiO2) nanowires (NWs) were synthesized using the hydrothermal method. Then, angled deposition was used to selectively coat the tips of the NWs yielding Au-capped TiO2 NWs with multiple sizes and shapes. The provided randomness leads to a multi-resonant system where the superposition of these resonance modes leads to an overall broadband absorption. The excited localized surface resonance (LSPR) modes contribute to the performance enhancement of the cell via near field effects and a hot electron injection mechanism. Moreover, these nanotips can trigger the formation of Fabry-Pérot (FP) cavity modes. The combination of the above-mentioned mechanisms leads to a high performance visible light driven plasmonic cell. At an applied potential of 1.23 V vs RHE, a photocurrent value as high as 82 μA/cm2 is acquired for the plasmonic based photoanode. The proposed design strategy is a large scale compatible route with no material restriction. Therefore, vast variety of semiconductor-metal pairs can be fabricated to obtain highly efficient water splitting cell for hydrogen generation.en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2021-02-24T07:28:59Z No. of bitstreams: 1 Large_scale_compatible_fabrication_of_gold_capped_titanium_dioxide_nanoantennas_using_a_shadowing_effect_for_photoelectrochemical_water_splitting.pdf: 2299209 bytes, checksum: e45827d18af92987444c5cf25320ce5e (MD5)en
dc.description.provenanceMade available in DSpace on 2021-02-24T07:28:59Z (GMT). No. of bitstreams: 1 Large_scale_compatible_fabrication_of_gold_capped_titanium_dioxide_nanoantennas_using_a_shadowing_effect_for_photoelectrochemical_water_splitting.pdf: 2299209 bytes, checksum: e45827d18af92987444c5cf25320ce5e (MD5) Previous issue date: 2020en
dc.description.sponsorshipThis work is supported by the Scientific and TechnologicalResearch Council of Turkey (TUBITAK), grant number215Z249. This work is supported by the project DPT-HAMIT aswell as TUBITAK under the project nos. 113E331, 114E374, and115F560en_US
dc.embargo.release2022-01-13
dc.identifier.doi10.1016/j.ijhydene.2019.11.060en_US
dc.identifier.issn0360-3199
dc.identifier.urihttp://hdl.handle.net/11693/75547
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttps://dx.doi.org/10.1016/j.ijhydene.2019.11.060en_US
dc.source.titleInternational Journal of Hydrogen Energyen_US
dc.subjectPlasmonicsen_US
dc.subjectHot-electronen_US
dc.subjectWater splittingen_US
dc.subjectPhotoelectrochemistryen_US
dc.titleLarge scale compatible fabrication of gold capped titanium dioxide nanoantennas using a shadowing effect for photoelectrochemical water splittingen_US
dc.typeArticleen_US

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