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Research Progress in Formation Mechanism of TiO2 Nanotubes and Nanopores in Porous Anodic Oxide
Zhu Xu-Fei1; Han Hua2; Song Ye1; Duan Wen-Qiang2
Source PublicationACTA PHYSICO-CHIMICA SINICA
2012-06-01
Volume28Issue:6Pages:1291-1305
SubtypeReview
AbstractSelf-ordered porous anodic TiO2 nanotubes and other porous anodic oxides (PAO) have received considerable attention because of their potential for high technological application in a number of fields. The anodization of valve metals has been widely investigated over the last eight decades. The formation mechanisms of hexagonal cells and nanotubes, however, have remained unclear until now. Simply reviewing the mechanisms of PAO formation was not the aim of this research and we were more interested in reviewing the forming processes of compact anodic oxides (CAO) and investigating the relationship between the PAO and CAO, to better understand the pore generating mechanisms. The present work introduces the differences between PAO and CAO films, as well as reviewing the traditional theories of PAO films and their deficiencies. Recent progress in the formation mechanism of PAO, including the viscous flow, breakdown, equifield strength, and oxygen bubbles models has been reviewed in detail. The perspective on future developments for the PAO forming mechanism has been tentatively discussed. Based on sufficient analysis of the latest findings, it has been proposed that several approaches may be employed for investigating the pore forming and self-ordering mechanisms. These new approaches include ultrasound-assisted anodizing, anodizing under vacuum or high pressure and adding sodium carbonate or a reducing agent to the PAO-forming electrolytes. An investigation of changes in the current and anodizing efficiencies would also be an effective approach for better understanding the physical nature of field-assisted dissolution (FAD).
KeywordCompact Anodic Oxide Porous Anodic Oxide Formation Mechanism Anodization Self-ordering
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordLIQUID-BASED ELECTROLYTES ; HEXAGONAL PORE ARRAYS ; ALUMINUM-OXIDE ; OXYGEN BUBBLES ; PULSE ANODIZATION ; FIELD ANODIZATION ; ACID ELECTROLYTE ; GROWTH-MECHANISM ; FILMS ; FABRICATION
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000305035700002
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/7998
Collection国家专用集成电路设计工程技术研究中心
Affiliation1.Nanjing Univ Sci & Technol, Educ Minist, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Automat, Natl Engn & Technol Res Ctr ASIC Design, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhu Xu-Fei,Han Hua,Song Ye,et al. Research Progress in Formation Mechanism of TiO2 Nanotubes and Nanopores in Porous Anodic Oxide[J]. ACTA PHYSICO-CHIMICA SINICA,2012,28(6):1291-1305.
APA Zhu Xu-Fei,Han Hua,Song Ye,&Duan Wen-Qiang.(2012).Research Progress in Formation Mechanism of TiO2 Nanotubes and Nanopores in Porous Anodic Oxide.ACTA PHYSICO-CHIMICA SINICA,28(6),1291-1305.
MLA Zhu Xu-Fei,et al."Research Progress in Formation Mechanism of TiO2 Nanotubes and Nanopores in Porous Anodic Oxide".ACTA PHYSICO-CHIMICA SINICA 28.6(2012):1291-1305.
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