dc.contributor.author | Folger, Alena | |
dc.contributor.author | Ebbinghaus, Petra | |
dc.contributor.author | Erbe, Andreas | |
dc.contributor.author | Scheu, Christina | |
dc.date.accessioned | 2017-05-30T08:32:58Z | |
dc.date.available | 2017-05-30T08:32:58Z | |
dc.date.created | 2017-04-24T10:38:00Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | ACS Applied Materials and Interfaces. 2017, 9 13471-13479. | nb_NO |
dc.identifier.issn | 1944-8244 | |
dc.identifier.uri | http://hdl.handle.net/11250/2443791 | |
dc.description.abstract | Titanium dioxide nanowire (NW) arrays are incorporated in many devices for energy conversion, energy storage, and catalysis. A common approach to fabricate these NWs is based on hydrothermal synthesis strategies. A drawback of this low-temperature method is that the NWs have a high density of defects, such as stacking faults, dislocations, and oxygen vacancies. These defects compromise the performance of devices. Here, we report a postgrowth thermal annealing procedure to remove these lattice defects and propose a mechanism to explain the underlying changes in the structure of the NWs. A detailed transmission electron microscopy study including in situ observation at elevated temperatures reveals a two-stage process. Additional spectroscopic analyses and X-ray diffraction experiments clarify the underlying mechanisms. In an early, low-temperature stage, the as-grown mesocrystalline NW converts to a single crystal by the dehydration of surface-bound OH groups. At temperatures above 500 °C, condensation of oxygen vacancies takes place, which leads to the fabrication of NWs with internal voids. These voids are faceted and covered with Ti3+-rich amorphous TiOx. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | American Chemical Society | nb_NO |
dc.title | The role of vacancy condensation for the formation of voids in rutile TiO2 nanowires | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.source.pagenumber | 13471-13479 | nb_NO |
dc.source.volume | 9 | nb_NO |
dc.source.journal | ACS Applied Materials and Interfaces | nb_NO |
dc.identifier.doi | 10.1021/acsami.7b01160 | |
dc.identifier.cristin | 1466160 | |
dc.description.localcode | This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review. To access the final edited and published work see http://pubs.acs.org/articlesonrequest/AORSd4kkUIW4y2z6W3BtbbkY. Locked until 30 March 2018 due to copyright restrictions | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |