نتایج جستجو برای: anodization technique

تعداد نتایج: 612174  

ابراهیمی, فاطمه, اشرفی زاده, فخرالدین, بخشی, سعید رضا,

In this research, ordered porous anodic templates with 30 nm diameter and 15 µm thickness were prepared by using double anodization process. Dip coating method was employed to synthesize strontium ferrite in the form of nanowires in sol dilution. Ferrite nanopowders were also synthesized using sol gel method. The characterization of the nanostructures were examined by X-Ray Diffraction (X...

2005
Jinsub Choi Young-Bae Park Axel Scherer

We describe the preparation of a tungsten pillar nanoimprint stamp without the use of lithography and etching techniques. Structures with heights of 15 nm were prepared on the basis of self-ordered porous alumina templates and this was followed by DC sputtering of tungsten. The stamp was successfully used to prepare an aluminium surface to obtain highly ordered porous anodic alumina films after...

Journal: :Chemical communications 2011
Kiyoung Lee Doohun Kim Patrik Schmuki

In the present work, we report on the self-organized growth of TiO(2) layers consisting of a highly aligned nanochannel morphology. We show that an electrochemical anodization process of Ti in a hot glycerol/K(2)HPO(4) electrolyte can be adjusted to yield these self-organized TiO(2) structures. The channel diameter and length are controllable by the anodization parameters. This directional stru...

2013
Vardan Galstyan Elisabetta Comini Guido Faglia Giorgio Sberveglieri

Synthesis--particularly by electrochemical anodization-, growth mechanism and chemical sensing properties of pure, doped and mixed titania tubular arrays are reviewed. The first part deals on how anodization parameters affect the size, shape and morphology of titania nanotubes. In the second part fabrication of sensing devices based on titania nanotubes is presented, together with their most no...

Journal: :Chemical communications 2012
Wei Wei Kiyoung Lee Santosh Shaw Patrik Schmuki

In the present work, we demonstrate the feasibility to form an aligned Nb(2)O(5) nanotube layer by self-organizing anodization of Nb in a NH(4)F-glycerol electrolyte. In order to achieve a nanotubular rather than a nanoporous layer, careful optimization of the anodization electrolyte is required. We show that only in a narrow window of electrolyte parameters highly aligned nanotubes of 50 nm in...

2014
Jin Young Kim Kai Zhu Nathan R Neale Arthur J Frank

Two-step anodization of transparent TiO2 nanotube arrays has been demonstrated with aid of a Nb-doped TiO2 buffer layer deposited between the Ti layer and TCO substrate. Enhanced physical adhesion and electrochemical stability provided by the buffer layer has been found to be important for successful implementation of the two-step anodization process. With the proposed approach, the morphology ...

Journal: :Nanoscale 2014
Ghafar Ali Hyun Jin Kim Jae Joon Kim Sung Oh Cho

Double-walled TiO2 nanotubes with porous wall morphologies are fabricated by anodization under ultraviolet (UV) irradiation. TiO2 formed by anodization of Ti is activated to generate electrons and holes by UV and the anodization process is influenced by the photo-generated charges. As a consequence, morphologies of the fabricated TiO2 nanotubes can be adjusted by controlling the UV illumination...

Journal: :Nanotechnology 2008
M Gowtham L Eude C S Cojocaru B Marquardt H J Jeong P Legagneux K K Song D Pribat

Confined lateral alumina templates are fabricated with different pore sizes by changing the acid electrolyte and the anodization voltage. The control of the number of pore rows down to one dimension is also achieved, by controlling the thickness of the starting aluminum film as well as the anodization voltage. We observe that the mechanism of pore formation in the lateral regime is very similar...

2006
Chang Yao Elliott B. Slamovich Thomas J. Webster

One approach to improve biological properties of current titanium and CoCrMo implant is to mimic the nanostructures of bone. Surface modification via anodization is popular to create such nanometer surface features on these metallic implants. The objective of the present study was to anodize titanium and CoCrMo and then determine osteoblast adhesion on such materials. Hydrofluoric acid was used...

2002
D. Nakada T. P. Orlando K. K. Berggren E. Macedo

cross-wafer standard deviation of Jc was typically ~ 5% for anodized wafers but was ≥15% for unanodized wafers (Figure 6). A low variation in Jc results in a higher yield of device chips per wafer with the desired current density. As a result of the improved cross-wafer distribution, the cross-chip uniformity is greatly improved as well; typically < 1% for anodized chips. Low cross-chip Jc vari...

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