Controlled Interconversion of Nanoarray of Ta Dimples and High Aspect Ratio Ta Oxide Nanotubes

被引：76

作者：

El-Sayed, Hany A. ^{[1
]}

Birss, Viola I. ^{[1
]}

机构：

[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada

来源：

NANO LETTERS | 2009年 / 9卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ANODIC-OXIDATION; TITANIUM-OXIDE; H2SO4/HF ELECTROLYTES; TIO2; NANOTUBES; FLUORIDE IONS; POROUS OXIDE; TANTALUM; FILMS; ANODIZATION; ARRAYS;

D O I：

10.1021/nl803010v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the controlled formation of either high-aspect-ratio Ta2O5 nanotubes; or an organized nanoarray of Ta dimples by Ta anodization in a single H2SO4 + HF solution. Dimpled Ta is the stable surface morphology in the first few seconds, followed by the growth of dense and fully vertically aligned Ta2O5 nanotubes (up to 2.5 mu m long). After 2 min, the dimpled surface morphology reappears, related to the build-up of a resistive Ta fluoride surface layer.

引用

页码：1350 / 1355

页数：6

共 33 条

[1] Synthesis of novel tantalum oxide sub-micrometer hollow spheres with tailored shell thickness
Agrawal, Mukesh
Pich, Andrij
Gupta, Smrati
Zafeiropoulos, Nikolaos E.
Simon, Paul
Stamm, Manfred
[J]. LANGMUIR, 2008, 24 (03) : 1013 - 1018
[2] Self-Assembled Fabrication of Vertically Oriented Ta2O5 Nanotube Arrays, and Membranes Thereof, by One-Step Tantalum Anodization
Allam, Nageh K.
Feng, Xinjian J.
Grimes, Craig A.
[J]. CHEMISTRY OF MATERIALS, 2008, 20 (20) : 6477 - 6481
[3] Self-organized porous titanium oxide prepared in H2SO4/HF electrolytes
Beranek, R
Hildebrand, H
Schmuki, P
[J]. ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (03) : B12 - B14
[4] The effect of electrolyte composition on the fabrication of self-organized titanium oxide nanotube arrays by anodic oxidation
Cai, QY
Paulose, M
Varghese, OK
Grimes, CA
[J]. JOURNAL OF MATERIALS RESEARCH, 2005, 20 (01) : 230 - 236
[5] Tantalum pentoxide (Ta2O5) thin films for advanced dielectric applications
Chaneliere, C
Autran, JL
Devine, RAB
Balland, B
[J]. MATERIALS SCIENCE & ENGINEERING R-REPORTS, 1998, 22 (06) : 269 - 322
[6] Despic A., 1989, Modern Aspects of Electrochemistry, V20, P401
[7] Formation of dimpled tantalum surfaces from electropolishing
El-Sayed, Hany
Singh, Sherdeep
Kruse, Peter
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (12) : C728 - C732
[8] Formation of highly ordered arrays of dimples on tantalum at the nanoscale
El-Sayed, Hany
Singh, Sherdeep
Greiner, Mark T.
Kruse, Peter
[J]. NANO LETTERS, 2006, 6 (12) : 2995 - 2999
[9] The proliferation and phenotypic expression of human osteoblasts on tantalum metal
Findlay, DM
Welldon, K
Atkins, GJ
Howie, DW
Zannettino, ACW
Bobyn, D
[J]. BIOMATERIALS, 2004, 25 (12) : 2215 - 2227
[10] Fast migration of fluoride ions in growing anodic titanium oxide
Habazaki, H.
Fushimi, K.
Shimizu, K.
Skeldon, P.
Thompson, G. E.
[J]. ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (05) : 1222 - 1227

← 1 2 3 4 →