TiO&lt;SUB align="right"&gt;2 thin films studied by FTIR, AFM and spectroscopic ellipsometry

Bouachiba, Yassine; Hanini, Faouzi; Bouabellou, A.; Kermiche, Fouad; Taabouche, Adel; Bouafia, Mohamed; Amara, Saad; Sahli, S.; Boukheddaden, Kamel

doi:10.1504/ijnp.2013.054992

Cited by 13 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The OH stretching and bending vibrations of silanol groups (Si–OH) were observed by the band at 3400 cm −1 while the 1600 cm −1 band was attributed to the bend vibrations of H– O –H bonds for the water molecules on the surface of the zeolite [ 33 , 39 ]. For TiO 2 , a remarkable band was observed at 500 cm −1 corresponding to anatase titania and in agreement with the XRD of solgel TiO 2 [ 40 ]. Rahman et al [ 17 ] reported the same FTIR spectrum for TiO 2 including two close bands for 2500 cm −1 .…”

Section: Resultssupporting

confidence: 76%

Titania-zeolite composite for tetracycline photocatalytic degradation under visible light: A comparison between doping and ion exchange

Jalloul,

Hijazi,

Boyadjian

et al. 2024

Heliyon

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 76%

Titania-zeolite composite for tetracycline photocatalytic degradation under visible light: A comparison between doping and ion exchange

Jalloul,

Hijazi,

Boyadjian

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…Both the air-TNT and H 2 -TNT groups showed broad bands ranging from 500 to 1000 cm −1 , which are caused by the Ti–O–Ti stretching vibration of Ti ions with octahedral coordination in anatase TiO 2 . 11 , 32 The band between 500 and 1000 cm −1 was weaker and broader in the H 2 -TNT spectrum than in the air-TNT spectrum, which might be related to nonstoichiometry caused by oxygen vacancies. 11 When compared with the air-TNT spectrum, an additional small peak at 1640 cm −1 and a broad band at 3400 cm −1 were observed for the H 2 -TNT spectrum, which might be attributable to the fundamental stretching vibration of absorbed water and/or –OH groups on the surfaces of the nanotubes.…”

Section: Resultsmentioning

confidence: 95%

“…11 When compared with the air-TNT spectrum, an additional small peak at 1640 cm −1 and a broad band at 3400 cm −1 were observed for the H 2 -TNT spectrum, which might be attributable to the fundamental stretching vibration of absorbed water and/or –OH groups on the surfaces of the nanotubes. 11 , 32–34…”

Section: Resultsmentioning

confidence: 99%

Immune response of macrophages on super-hydrophilic TiO₂nanotube arrays

Gao

Wang

et al. 2020

J Biomater Appl

View full text Add to dashboard Cite

Macrophages are attracting increasing attention in promoting implant-mediated osteogenesis by modulating the microenvironment of the implant site. Biomaterial surface properties including topography and wettability regulate macrophage responses to influence tissue repair. The objective of our present study was to investigate the effects of hydrogenated titanium dioxide nanotube surfaces on the immune response of macrophages in vitro. Hydrogenated titanium dioxide nanotubes (TNTs) were synthesized on Ti surfaces by anodic oxidation and hydrogenation to form super-hydrophilic nanotubular surfaces. Macrophages were seeded directly onto three substrates (hydrogenated TNTs (H2-TNTs), air-annealed TNTs, and commercially pure Ti substrates) and grown under standard or lipopolysaccharide-stimulated culture conditions. Cell proliferation and viability were evaluated by Cell Counting Kit-8 and live/dead staining at 24 and 48 h. Secretion and expression of pro- and anti-inflammatory cytokines were evaluated at 24 and 48 h to determine whether the surfaces elicited differential macrophage behaviors. Gene expression of the M1/M2 surface markers of macrophages was analyzed to assess the effect of the H2-TNT surface on macrophage polarization. The results showed that hydrogenation of the TNT surface resulted in a super-hydrophilic substrate, which exhibited markedly improved wettability attributable to the formation of oxygen vacancies in the nanotubes. The H2-TNT group induced a significantly lower macrophage proliferation rate and up-regulated anti-inflammatory cytokines (interleukin-10, bone morphogenetic protein-2, and transforming growth factor-β1) irrespective of lipopolysaccharide stimulation, while alleviating the secretion of pro-inflammatory cytokines (tumor necrosis factor-α, interleukin-6, nitric oxide, and macrophage chemotactic protein-1) induced by lipopolysaccharide. Moreover, the H2-TNT surface elicited up-regulated gene expression of M2 surface markers and down-regulation of M1 surface markers. We concluded that the hydrogenated TNT surface modulated macrophage immune responses, which could be useful in accelerating inflammation resolution and facilitating tissue repair.

show abstract

“…Absorption at 385 and 438 cm –1 can be attributed to the Ti–O–Ti bonds of the anatase phase of TiO 2 , whereas absorption at 610 cm –1 can be attributed to the same for the rutile phase of TiO 2 . − The feature at 890 cm –1 can be assigned to the C–C skeleton, whereas the features at 1107 and 1725 cm –1 are due to C–O stretching modes. Absorption at 1534 and 2370 cm –1 are attributed to the vibration of C–H and CH 2 bonds, respectively, and absorption at 3750 cm –1 is due to octahedral vacancies and is designated as the Ti–OH bond. − It can be observed from Figure b that the absorption related to the C–H and –OH bonds is increased slightly in the case of STOPM compared to that of STO. This increase can be attributed to the incorporation of C–H and −OH functional groups into STOPM through the addition of PMMA.…”

Section: Resultsmentioning

confidence: 99%

PMMA as an Additive for Nanostructured TiO₂ Thin Films for Heterojunction Visible-Blind Photodetectors

Pal,

Jana,

Kamparath

et al. 2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

This study reports on high-quality, crystalline, nanostructured TiO 2 thin films with large-area coverage prepared by the sol−gel process using PMMA (poly(methyl methacrylate)) as an additive for applications in visible-blind photodetection. The Si/TiO 2 p−n junction photodiodes, fabricated through an inexpensive yet simple process with the addition of PMMA, exhibit superior characteristics, making them excellent candidates for visible-blind photodetectors operational in the UV and NIR ranges. The addition of PMMA to the solution significantly enhances the crystalline and optical properties, as well as the nanostructure morphology of the TiO 2 films. It is demonstrated that the nanostructure morphology, refractive index, and bandgap of TiO 2 can be precisely tailored by controlling the TiO 2 sol/PMMA volume ratio. A valence band offset as large as 2.8 ± 0.20 eV is measured for the TiO 2 /Si heterointerface, ensuring hole blockage through the film and electron-selective transport. Application of the TiO 2 nanostructured thin films in the p-Si/n-TiO 2 junction photodiodes reveals an excellent rectification ratio of ∼2 × 10 4 with a leakage current as low as ∼10 −10 A and a superior phototo-dark current ratio of ∼8000 under 325 nm illumination. Under reverse bias conditions, the photodiodes exhibit a reasonably high photoresponsivity (>1 A/W) with a high detectivity of ∼1 × 10 13 Jones. Moreover, a response time of ∼200 ms is achieved using these photodiodes.

show abstract

TiO<SUB align="right">2 thin films studied by FTIR, AFM and spectroscopic ellipsometry

Cited by 13 publications

References 0 publications

Titania-zeolite composite for tetracycline photocatalytic degradation under visible light: A comparison between doping and ion exchange

Titania-zeolite composite for tetracycline photocatalytic degradation under visible light: A comparison between doping and ion exchange

Immune response of macrophages on super-hydrophilic TiO₂nanotube arrays

PMMA as an Additive for Nanostructured TiO₂ Thin Films for Heterojunction Visible-Blind Photodetectors

Contact Info

Product

Resources

About

TiO<SUB align="right">2 thin films studied by FTIR, AFM and spectroscopic ellipsometry

Cited by 13 publications

References 0 publications

Titania-zeolite composite for tetracycline photocatalytic degradation under visible light: A comparison between doping and ion exchange

Titania-zeolite composite for tetracycline photocatalytic degradation under visible light: A comparison between doping and ion exchange

Immune response of macrophages on super-hydrophilic TiO2nanotube arrays

PMMA as an Additive for Nanostructured TiO2 Thin Films for Heterojunction Visible-Blind Photodetectors

Contact Info

Product

Resources

About

Immune response of macrophages on super-hydrophilic TiO₂nanotube arrays

PMMA as an Additive for Nanostructured TiO₂ Thin Films for Heterojunction Visible-Blind Photodetectors