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dc.contributor.authorRen, Xinen
dc.contributor.authorSangle, Abhijeeten
dc.contributor.authorZhang, Siyuanen
dc.contributor.authorYuan, Shuaien
dc.contributor.authorZhao, Yinen
dc.contributor.authorShi, Liyien
dc.contributor.authorHoye, Roberten
dc.contributor.authorCho, Seunghoen
dc.contributor.authorLi, Dongdongen
dc.contributor.authorMacManus-Driscoll, Judith Len
dc.date.accessioned2016-06-28T13:02:39Z
dc.date.available2016-06-28T13:02:39Z
dc.date.issued2016-06-01en
dc.identifier.issn2050-7488
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/256510
dc.description.abstractWe demonstrate selective growth of ZnO branched nanostructures: from nanorod clusters (with branches parallel to parent rods) to nanotrees (with branches perpendicular to parent rods). The growth of these structures was realized using a three-step approach: electrodeposition of nanorods (NRs), followed by the sputtering of ZnO seed layers, followed by the growth of branched arms using hydrothermal growth. The density, size and direction of the branches were tailored by tuning the deposition parameters. To our knowledge, this is the first report of control of branch direction. The photoelectrochemical (PEC) performance of the ZnO nanostructures follows the order: nanotrees (NTs) > nanorod clusters (NCs) > parent NRs. The NT structure with the best PEC performance also possesses the shortest fabrication period which had never been reported before. The photocurrent of the NT and NC photoelectrodes is 0.67 and 0.56 mA cm$^{−2}$ at 1 V vs. Ag/AgCl, respectively, an enhancement of 139% and 100% when compared to the ZnO NR structures. The key reason for the improved performance is shown to be the very large surface-to-volume ratios in the branched nanostructures, which gives rise to enhanced light absorption, improved charge transfer across the nanostructure/electrolyte interfaces to the electrolyte and efficient charge transport within the material.
dc.description.sponsorshipThe authors are very grateful to the financial support by the Chinese National Natural Science Foundation (Grant No. 51202140, 51311130128, 51302164, 51472154), the Royal Society International Exchanges Scheme-2012 China, grant no. IE121434, the British Council UKIERI grant IND/CONT/E/12-13/813, and the European Research Council grant (ERC-2009-AdG 247276 NOVOX).
dc.languageEnglishen
dc.language.isoenen
dc.publisherRoyal Society of Chemistry
dc.rightsAttribution 4.0 International*
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titlePhotoelectrochemical water splitting strongly enhanced in fast-grown ZnO nanotree and nanocluster structuresen
dc.typeArticle
dc.description.versionThis is the final version of the article. It first appeared from the Royal Society of Chemistry via http://dx.doi.org/10.1039/C6TA02788Aen
prism.publicationDate2016en
prism.publicationNameJournal of Materials Chemistry Aen
dc.identifier.doi10.17863/CAM.457
dcterms.dateAccepted2016-05-31en
rioxxterms.versionofrecord10.1039/C6TA02788Aen
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en
rioxxterms.licenseref.startdate2016-06-01en
dc.contributor.orcidSangle, Abhijeet [0000-0003-0848-4583]
dc.contributor.orcidHoye, Robert [0000-0002-7675-0065]
dc.identifier.eissn2050-7496
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Research Council (247276)
cam.orpheus.successThu Jan 30 12:57:59 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International