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Ex Situ Evidence for the Role of a Fluoride-Rich Layer Switching the Growth of Nanopores to Nanotubes: A Missing Piece of the Anodizing Puzzle
| Title: | Ex Situ Evidence for the Role of a Fluoride-Rich Layer Switching the Growth of Nanopores to Nanotubes: A Missing Piece of the Anodizing Puzzle |
| Authors: | Shahzad, Khurram Browse this author | | Kowalski, Damian Browse this author | | Zhu, Chunyu Browse this author | | Aoki, Yoshitaka Browse this author | | Habazaki, Hiroki Browse this author →KAKEN DB |
| Keywords: | anodizing | | iron oxide nanotubes | | anodic oxide | | fluoride-rich-layer |
| Issue Date: | Feb-2018 |
| Publisher: | Wiley-Blackwell |
| Journal Title: | ChemElectroChem |
| Volume: | 5 |
| Issue: | 4 |
| Start Page: | 610 |
| End Page: | 618 |
| Publisher DOI: | 10.1002/celc.201701103 |
| Abstract: | Anodizing involves a high-voltage electrochemical conversion process that forms barrier-type oxide layers or self-organized nanoporous/nanotubular structures. So far, Al2O3-like nanopores and TiO2-like nanotubes could be successfully synthesized on many metals and alloys. The proposed models of anodic oxide nanotubes growth, however, sacrifice from lack of evidence of the transition from nanopores to nanotubes. The present study demonstrates a missing piece of this anodizing puzzle, which is responsible for the formation of nanotubes in fluoride-containing organic electrolytes. For this purpose, we choose an anodic oxide formed on iron, as a model case, because both nanotubes and nanopores can be formed and slow kinetics of transition between those two forms allows us to observe, ex situ, a fluoride-rich-layer upon nanopores/nanotubes transition. The compositional fingerprints of this transition shed a light on the general mechanism of nanotubes growth in fluoride-containing electrolytes. |
| Rights: | This is the peer reviewed version of the following article: ChemElecroChem, 5(4), 610-618pp., 2018, which has been published in final form at https://doi.org/10.1002/celc.201701103. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/72473 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 幅崎 浩樹
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