Forming efficiency of porous anodic oxide and formation mechanism of nanopores

	Forming efficiency of porous anodic oxide and formation mechanism of nanopores
	Zhu Xu-Fei 1; Han Hua2 ; Song Ye 1; Ma Hong-Tu2 ; Qi Wei-Xing 1; Lu Chao 1; Xu Chen 1
发表期刊	ACTA PHYSICA SINICA
	2012
卷号	61 期号:22
文章类型	Article
摘要	Porous anodic alumina (PAA) and porous anodic TiO2 nanotubes have received considerable attention because of their applications in a number of fields. The formation mechanisms of nanopores and nanotubes in these porous anodic oxides, however, have remained unclear until now. The interactions between porous structural features and current-time transients in anodizing process cannot be successfully explained. Based on the mechanism of dielectric breakdown of the compact anodic alumina (CAA), the differences and internal relations in their forming processes between CAA and PAA are contrasted in detail. From this innovative standpoint, according to the divergence of PAA and CAA in their current-time curves (or voltage-time curves), two essential causes which induce the decrease of the forming efficiency of oxide in the anodizing process, that is, the generation of the electronic current and the oxygen evolution, are presented in the paper. The evidences of the round hollows within the CAA films, show that the regularly embryo pores result from the oxygen bubbles. According to the aluminum anodizing in the mixed-electrolyte, the results show that once oxygen evolution stopping, the pore growth must be stopped, and the pores must be sealed by the above compact oxide. A novel composite film of the anodic oxide is presented. All of the above conclusively show that in the forming process of PAA, an appropriate magnitude of electronic current ensures the oxygen evolution and the pores formation, an appropriate magnitude of ionic current ensures the oxide formation and growth of pore walls.
关键词	Anodization Porous Anodic Alumina (Paa) Electronic Current Nanoporous Materials
WOS标题词	Science & Technology ; Physical Sciences
关键词[WOS]	HEXAGONAL PORE ARRAYS ; TIO2 NANOTUBE ARRAYS ; ALUMINUM-OXIDE ; PULSE ANODIZATION ; OXYGEN BUBBLES ; FILMS ; GROWTH ; ACID ; MORPHOLOGY ; FABRICATION
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000316732600073
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/7992
专题	脑图谱与类脑智能实验室_微观重建与智能分析
作者单位	1.Nanjing Univ Sci & Technol, Minist Educ, 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
推荐引用方式 GB/T 7714	Zhu Xu-Fei,Han Hua,Song Ye,et al. Forming efficiency of porous anodic oxide and formation mechanism of nanopores[J]. ACTA PHYSICA SINICA,2012,61(22).
APA	Zhu Xu-Fei.,Han Hua.,Song Ye.,Ma Hong-Tu.,Qi Wei-Xing.,...&Xu Chen.(2012).Forming efficiency of porous anodic oxide and formation mechanism of nanopores.ACTA PHYSICA SINICA,61(22).
MLA	Zhu Xu-Fei,et al."Forming efficiency of porous anodic oxide and formation mechanism of nanopores".ACTA PHYSICA SINICA 61.22(2012).