Achievement and evaluation of some ceramic nanostructured titanium oxide-layers

Roman, Ioan; Fratila, Corneliu; Vasile, Eugeniu; Petre, Alexandru Eugen; Soare, Maria-Laura

doi:10.1016/j.mseb.2009.07.012

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…Titanium dioxide nanotube layers are used as photocatalysts in water and environmental purification, as well as biological and biomedical applications [150][151][152]. In particular, titanium dioxide nanotubes are used as a biomaterial for implants, drug delivery platforms, tissue engineering, and bacteria killing [153][154][155]. Another interesting propriety of TiO2 is its tunable wettability effect [156].…”

Section: Boron Nitride Nanotubesmentioning

confidence: 99%

Biocompatibility and Toxicity of Nanoparticles and Nanotubes

Wang

Fan

et al. 2012

Journal of Nanomaterials

220

184

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In recent years, nanoparticles (NPs) have increasingly found practical applications in technology, research, and medicine. The small particle size coupled with their unique chemical and physical properties is thought to underline their exploitable biomedical activities. Its form may be latex body, polymer, ceramic particle, metal particles, and the carbon particles. Due to their small size and physical resemblance to physiological molecules such as proteins, NPs possess the capacity to revolutionise medical imaging, diagnostics, therapeutics, as well as carry out functional biological processes. But these features may also underline their toxicity. Indeed, a detailed assessment of the factors that influence the biocompatibility and toxicity of NPs is crucial for the safe and sustainable development of the emerging NPs. Due to the unique structure, size, and shape, much effort has been dedicated to analyzing biomedical applications of nanotubes.This paper focuses on the current understanding of the biocompatibility and toxicity of NPs with an emphasis on nanotubes.

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Section: Boron Nitride Nanotubesmentioning

confidence: 99%

Biocompatibility and Toxicity of Nanoparticles and Nanotubes

Wang

Fan

et al. 2012

Journal of Nanomaterials

220

184

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“…The Ti film deposited on glass by magnetron sputtering showed no change after thermal oxidation in air below 550 C, and transformed into mixed Ti 2 O and rutile at 550 C. 9 The Ti film on NaCl substrate was also found to transform to rutile after thermal oxidation in air at 375 and 400 C, but to TiO at 350 C. 10 Titanium generally forms an amorphous TiO 2 surface layer after anodic treatment. [11][12][13][14][15][16][17][18][19] Depending on the voltage, current, time, and electrolyte, anatase may also be present in the amorphous layer. [12][13][14][15][16][17][18][19][20][21][22] The amorphous layer may transform into anatase or mixed anatase and rutile after further annealing in air.…”

mentioning

confidence: 99%

“…[11][12][13][14][15][16][17][18][19] Depending on the voltage, current, time, and electrolyte, anatase may also be present in the amorphous layer. [12][13][14][15][16][17][18][19][20][21][22] The amorphous layer may transform into anatase or mixed anatase and rutile after further annealing in air. [16][17][18][19][20] Because no anatase can be formed by thermal oxidation of Ti in air, the reasons for the formation of anatase by the anodized and/or annealing processes need to be studied.…”

mentioning

confidence: 99%

“…[12][13][14][15][16][17][18][19][20][21][22] The amorphous layer may transform into anatase or mixed anatase and rutile after further annealing in air. [16][17][18][19][20] Because no anatase can be formed by thermal oxidation of Ti in air, the reasons for the formation of anatase by the anodized and/or annealing processes need to be studied. TiO was occasionally observed to be present in the oxide surface after anodic treatment of Ti.…”

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confidence: 99%

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Formation of Anatase and TiO from Ti Thin Film after Anodic Treatment and Thermal Annealing

Chung

Gan

et al. 2011

J. Electrochem. Soc.

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The phase transformation of anodized Ti film has been studied. Although X-ray diffraction detected only the amorphous TiO 2 phase, transmission electron microscopy analysis showed that TiO nanocrystallites less than 10 nm in size were also present, which was further supported by x-ray photoelectron spectroscopy analysis. Anatase was found to appear gradually by annealing the as-anodized specimen in air at 500-550 C, which was accompanied by a simultaneous disappearance of TiO nanocrystallites. In contrast, only rutile is formed by annealing the Ti film at the same temperatures. The results indicate that TiO can induce the formation of anatase, which is explained by the close similarity between their structures.

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“…Titanium dioxide nanotube layers are used as photo-catalysts in water and environmental purification, as well as, biological and biomedical applications [5,6,7]. In particular, Titanium dioxide nanotubes are used as a new biomaterial for implants, drug delivery platforms, tissue engineering and bacteria killing [8,9,10,11,12,13,14]. Another interesting propriety of TiO 2 is its tunable wettability effect [15,16].…”

Section: Introductionmentioning

confidence: 99%

Tunable Functionality and toxicity studies of Titanium Dioxide Nanotube Layers

Feschet-Chassot,

Raspal,

Awitor

et al. 2010

Preprint

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In this work, we have developed economic process to elaborate scalable titanium dioxide nanotube layers which show a tunable functionality. The titanium dioxide nanotube layers was prepared by electrochemical anodization of Ti foil in 0.4 wt% hydrofluoric acid solution. The nanotube layers structure and morphology were characterized using x-ray diffraction and scanning electron microscopy. The surface topography and wettability was studied according to the anodization time. The sample synthesized while the current density reached a local minimum displayed higher contact angle. Beyond this point, the contact angles decrease with the anodization time. Photo-degradation of acid orange 7 in aqueous solution was used as a probe to assess the photo-catalytic activity of titanium dioxide nanotube layers under UV irradiation. We obtained better photocatalitic activity for the sample elaborate at higher current density. Finally we use the Ciliated Protozoan T. pyriformis, an alternative cell model used for in vitro toxicity studies, to predict the toxicity of titanium dioxide nanotube layers in biological system. We did not observe any characteristic effect in the presence of the titanium dioxide nanotube layers on two physiological parameters related to this organism, non-specific esterases activity and population growth rate.

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Achievement and evaluation of some ceramic nanostructured titanium oxide-layers

Cited by 6 publications

References 6 publications

Biocompatibility and Toxicity of Nanoparticles and Nanotubes

Biocompatibility and Toxicity of Nanoparticles and Nanotubes

Formation of Anatase and TiO from Ti Thin Film after Anodic Treatment and Thermal Annealing

Tunable Functionality and toxicity studies of Titanium Dioxide Nanotube Layers

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