Observation of anatase nanograins crystallizing from anodic amorphous TiO2 nanotubes

CrystEngComm ◽  
2015 ◽  
Vol 17 (38) ◽  
pp. 7346-7353 ◽  
Author(s):  
Ik Jae Park ◽  
Dong Hoe Kim ◽  
Won Mo Seong ◽  
Byung Suh Han ◽  
Gill Sang Han ◽  
...  
Keyword(s):  
Water Content ◽  
Crystallographic Orientation ◽  
Tio2 Nanotubes ◽  
Nanotube Arrays ◽  
Amorphous Tio2

Water content in an anodic electrolyte affects the crystallization route of anodic TiO2 nanotube arrays during annealing, which determines the crystallographic orientation of the nanotubes.

scholarly journals Highly Ordered TiO2 Nanotube Arrays with Engineered Electrochemical Energy Storage Performances

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 510
Author(s):  
Wangzhu Cao ◽  
Kunfeng Chen ◽  
Dongfeng Xue
Keyword(s):  
Tio2 Nanotubes ◽  
Lithium Ion ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Free Standing ◽  
Structured Materials ◽  
Self Organized ◽  
Binder Free

Nanoscale engineering of regular structured materials is immensely demanded in various scientific areas. In this work, vertically oriented TiO2 nanotube arrays were grown by self-organizing electrochemical anodization. The effects of different fluoride ion concentrations (0.2 and 0.5 wt% NH4F) and different anodization times (2, 5, 10 and 20 h) on the morphology of nanotubes were systematically studied in an organic electrolyte (glycol). The growth mechanisms of amorphous and anatase TiO2 nanotubes were also studied. Under optimized conditions, we obtained TiO2 nanotubes with tube diameters of 70–160 nm and tube lengths of 6.5–45 μm. Serving as free-standing and binder-free electrodes, the kinetic, capacity, and stability performances of TiO2 nanotubes were tested as lithium-ion battery anodes. This work provides a facile strategy for constructing self-organized materials with optimized functionalities for applications.

scholarly journals Atomistic investigation into the mechanical behaviour of crystalline and amorphous TiO2 nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 28121-28129 ◽  
Author(s):  
Yanan Xu ◽  
Mingchao Wang ◽  
Ning Hu ◽  
John Bell ◽  
Cheng Yan
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Titanium Dioxide ◽  
Molecular Dynamics Simulations ◽  
Mechanical Behaviour ◽  
Tio2 Nanotubes ◽  
Amorphous Tio2 ◽  
Dynamics Simulations

The mechanical properties of titanium dioxide (TiO2) nanotubes are studied based on molecular dynamics simulations.

Fabrication of different crystallographically oriented TiO2 nanotube arrays used in dye-sensitized solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (51) ◽  
pp. 41120-41124 ◽  
Author(s):  
Liujie Wang ◽  
Yi Wang ◽  
Yong Yang ◽  
Xiaodong Wen ◽  
Hongwei Xiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Water Content ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Different crystallographically oriented TiO2 NTAs were fabricated via anodizing Ti film in an electrolyte with different water content.

scholarly journals Plasma-Induced Crystallization of TiO2 Nanotubes

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 626 ◽  
Author(s):  
Metka Benčina ◽  
Ita Junkar ◽  
Rok Zaplotnik ◽  
Matjaz Valant ◽  
Aleš Iglič ◽  
...  
Keyword(s):  
Tio2 Nanotubes ◽  
Oxygen Plasma ◽  
Biological Response ◽  
Electrochemical Anodization ◽  
X Ray Diffraction ◽  
Rapid Crystallization ◽  
Amorphous Tio2 ◽  
Tio2 Nts ◽  
First Time

Facile crystallization of titanium oxide (TiO2) nanotubes (NTs), synthesized by electrochemical anodization, with low pressure non-thermal oxygen plasma is reported. The influence of plasma processing conditions on TiO2 NTs crystal structure and morphology was examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). For the first time we report the transition of amorphous TiO2 NTs to anatase and rutile crystal structures upon treatment with highly reactive oxygen plasma. This crystallization process has a strong advantage over the conventional heat treatments as it enables rapid crystallization of the surface. Thus the crystalline structure of NTs is obtained in a few seconds of treatment and it does not disrupt the NTs’ morphology. Such a crystallization approach is especially suitable for medical applications in which stable crystallized nanotubular morphology is desired. The last part of the study thus deals with in vitro biological response of whole blood to the TiO2 NTs. The results indicate that application of such surfaces for blood connecting devices is prospective, as practically no platelet adhesion or activation on crystallized TiO2 NTs surfaces was observed.

Deformation-driven electrical transport in amorphous TiO2 nanotubes

2012 ◽  
Vol 109 (1) ◽  
pp. 127-132 ◽  
Author(s):  
A. Asthana ◽  
T. Shokuhfar ◽  
Q. Gao ◽  
P. A. Heiden ◽  
R. S. Yassar
Keyword(s):  
Electrical Transport ◽  
Tio2 Nanotubes ◽  
Amorphous Tio2

NaAc Effect on the Anodization Formation of TiO2 Nanotube Arrays in Glycerol Based Electrolytes

2010 ◽  
Vol 105-106 ◽  
pp. 371-375
Author(s):  
Yu Xin Yin ◽  
Xin Tan ◽  
Feng Hou
Keyword(s):  
Growth Rate ◽  
Aspect Ratio ◽  
Dissolution Rate ◽  
Protective Coating ◽  
Tio2 Nanotubes ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Chemical Dissolution ◽  
Tio2 Surface

Effect of NaAc on the anodic growth of TiO2 nanotube arrays is described. NaAc-added approach yields longer nanotubes relative to samples grown from NaAc-free electrolyte. And the growth rate of TiO2 nanotubes has pH independency in NaAc-added electrolytes. The key to achieve a high aspect ratio TiO2 nanotube arrays is to decrease the chemical dissolution rate at the mouth of the tube by adding NaAc as protective coating. Adsorption of Ac- species on the TiO2 surface is shown to markedly decrease the chemical dissolution rate of the tube mouth, resulting in longer nanotube length.

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