Sensitivity enhancement towards ethanol and methanol of TiO2 films doped with Pt and Nb

Comini, Elisabetta; Faglia, Guido; Li, Y.X; Włodarski, W.; Ghantasala, Muralidhar K.

doi:10.1016/s0925-4005(99)00502-x

Cited by 80 publications

(28 citation statements)

References 6 publications

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“…TiO 2 films are being extensively studied because of their interesting chemical, electrical and optical properties resulting in widespread applications, e.g., in catalysis, photocatalysis, dye-sensitized photovoltaic cells, gas sensors [6][7][8][9] and pharmaceuticals [10][11][12]. Besides, TiO 2 nanofilms are widely used as protective layers for very large-scale integrated (VLSI) circuits and as antireflective (AR) coatings for optical elements and planar waveguides.…”

Section: Methodsmentioning

confidence: 99%

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO₂(Ti)/SiO₂/Si stacks

Filatova¹,

Кожевников²,

Sokolov³

et al. 2012

Science and Technology of Advanced Materials

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(2012) Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO 2 (Ti)/SiO 2 /Si stacks, Science AbstractWe developed a mathematical analysis method of reflectometry data and used it to characterize the internal structure of TiO 2 /SiO 2 /Si and Ti/SiO 2 /Si stacks. Atomic concentration profiles of all the chemical elements composing the samples were reconstructed from the analysis of the reflectivity curves measured versus the incidence angle at different soft x-ray reflection (SXR) photon energies. The results were confirmed by the conventional techniques of hard x-ray photoelectron spectroscopy (HXPES) and high-resolution transmission electron microscopy (HRTEM). The depth variation of the chemical composition, thicknesses and densities of individual layers extracted from SXR and HXPES measurements are in close agreement and correlate well with the HRTEM images.

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Section: Methodsmentioning

confidence: 99%

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO₂(Ti)/SiO₂/Si stacks

Filatova¹,

Кожевников²,

Sokolov³

et al. 2012

Science and Technology of Advanced Materials

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“…Although many articles mention the influence of Nb on strain, grain size evolution, and anatase-to-rutile transformation, as well as the consequences for sensing devices, 17,19,20,25,26 little systematic research has been carried out in this field. Therefore, our work provides useful data for the technological improvement of TiO 2 -based gas sensor devices, as well as for the scientific understanding of the anatase-to-rutile transformation and the role of Nb doping in these mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nb doping on the TiO2 anatase-to-rutile phase transition

Arbiol

Cerdá

Dezanneau

et al. 2002

Journal of Applied Physics

312

184

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We study the influence of Nb doping on the TiO 2 anatase-to-rutile phase transition, using combined transmission electron microscopy, Raman spectroscopy, x-ray diffraction and selected area electron diffraction analysis. This approach enabled anatase-to-rutile phase transition hindering to be clearly observed for low Nb-doped TiO 2 samples. Moreover, there was clear grain growth inhibition in the samples containing Nb. The use of high resolution transmission electron microscopy with our samples provides an innovative perspective compared with previous research on this issue. Our analysis shows that niobium is segregated from the anatase structure before and during the phase transformation, leading to the formation of NbO nanoclusters on the surface of the TiO 2 rutile nanoparticles.

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“…It has been reported that the higher surface area in meso-scale is, the better sensitivity obtained for methanol detection. [49,50] Therefore, the mesoporous structure of HC-600-1 resulted in the higher surface area for ion adsorption than C-600-1 without meso-scale structure, [51] which ultimately led to the higher sensitivity in methanol concentration detection for HC-600-1.…”

Section: Liquid Detection Ability Of Hc-petmentioning

confidence: 99%

A Hierarchically Porous Carbon Fabric for Highly Sensitive Electrochemical Sensors

Yuan

Cho²,

Lee³

et al. 2017

Adv Eng Mater

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The hierarchically porous carbon fabrics with controlled conductivity and hydrophilicity have been fabricated by dual templating method of soft templates nested on hard templates. A non‐woven fabric coated with a solution of F127/resol has been carbonized for the synthesis of both macro‐porous structures of 10–15 µm in diameter having meso‐porous carbon structures of 4–6 nm, respectively. After carbonization treatment, not only conductivity is significantly improved, the hierarchically porous carbon also shows superhydrophilicity or water‐absorbing nature due to mild hydrophilic material and its dual scale roughness. The porous carbon becomes conductive with resistivity widely tuned from 5.4 × 103 Ωm to 3.1 × 10−3 Ωm by controlling the carbonization temperature. As the increased wettability for organic liquids could lead organic molecules deep into carbonized fabrics, the sensitivity of hierarchically porous carbon fabrics benefits the detection for methanol(CH3OH) or hydrogen peroxide (H2O2). This new design concept of hierarchically porous structures having the multi‐functionality of high wettability and conductivity can be highly effective for electroanalytical sensors.

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Sensitivity enhancement towards ethanol and methanol of TiO2 films doped with Pt and Nb

Cited by 80 publications

References 6 publications

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO₂(Ti)/SiO₂/Si stacks

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO₂(Ti)/SiO₂/Si stacks

Effects of Nb doping on the TiO2 anatase-to-rutile phase transition

A Hierarchically Porous Carbon Fabric for Highly Sensitive Electrochemical Sensors

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Sensitivity enhancement towards ethanol and methanol of TiO2 films doped with Pt and Nb

Cited by 80 publications

References 6 publications

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO2(Ti)/SiO2/Si stacks

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO2(Ti)/SiO2/Si stacks

Effects of Nb doping on the TiO2 anatase-to-rutile phase transition

A Hierarchically Porous Carbon Fabric for Highly Sensitive Electrochemical Sensors

Contact Info

Product

Resources

About

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO₂(Ti)/SiO₂/Si stacks

Soft x-ray reflectometry, hard x-ray photoelectron spectroscopy and transmission electron microscopy investigations of the internal structure of TiO₂(Ti)/SiO₂/Si stacks