Low-energy electron energy loss spectroscopy of rutile and anatase TiO2 films in the core electron excitation regions

Okada, Masahisa; Jin, Ping; Yamada, Yasusei; Tazawa, Masato; Yoshimura, Kazuyoshi

doi:10.1016/j.susc.2004.06.049

Cited by 18 publications

(15 citation statements)

References 14 publications

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“…2(a)). As is reported earlier [7], we have formed TiO 2 films with desired single phase of anatase or rutile on Si substrates under precisely controlled sputter parameters and also observed a slight splitting on the 2p 3/2 3d r peak in REELS spectra of the Ti 2p core electron excitation for both anatase and rutile TiO 2 films. Such a splitting of 2p 3/2 3d r peaks is presumably due to the distortion of the Ti sited from octahedral to D 2d and D 2h symmetry in anatase and rutile, respectively [11,12].…”

Section: Resultssupporting

confidence: 83%

“…By the use of reflection electron energy loss spectroscopy (REELS) in the core electron excitation region [7], we also characterize the electronic structure of TiO 2 overlayers in the near-surface region. REELS spectra in the core electron excitation regions reflect the shape of the density of states in the conduction band weighted with the transition probability since the width of the initial core levels is very narrow.…”

Section: Introductionmentioning

confidence: 99%

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Change in the chemical and electronic properties of TiO2/SnO2:F stacked-layers induced by the photocatalytic reaction

Okada¹,

Yamada²,

Yoshimura³

2006

Surface Science

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Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Change in the chemical and electronic properties of TiO2/SnO2:F stacked-layers induced by the photocatalytic reaction

Okada¹,

Yamada²,

Yoshimura³

2006

Surface Science

Self Cite

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“…By increasing the molar content of SnO 2 , the anatase peak intensities drastically decrease and the rutile peaks increase. This suggests that SnO 2 promotes and facilitates the growth of TiO 2 rutile at low temperatures, due to the similarity of the structures between SnO 2 and TiO 2 rutile phase [12,19]. It should be noted that there are no vibrational modes characteristics of SnO 2 .…”

Section: Raman Analysismentioning

confidence: 93%

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Medjaldi

Bouabellou

Bouachiba

et al. 2020

Mater. Res. Express

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In this research TiO 2 , SnO 2 and TiO 2 :SnO 2 nanocomposite thin films were fabricated by the sol-gel dip coating technique. The mixture was prepared by varying the molar ratio of SnO 2 to TiO 2 , i.e. TiO 2 :SnO 2 (9:1), TiO 2 :SnO 2 (8:2) and TiO 2 :SnO 2 (6:4)). The obtained samples were characterized by means of the Raman microscopy, Scanning Electron Microscopy (SEM), UV-Vis spectrophotometry and m-lines spectroscopy (Prism coupler). Raman analysis shows that pure TiO 2 and SnO 2 thin films are characterized by the vibrational modes of anatase and rutile cassiterite, respectively. Furthermore, the Raman spectra of the TiO 2 :SnO 2 nanocomposites show the presence of a mixture of anatase and rutile TiO 2 phases. The SEM images reveal that the morphology is clearly modified with SnO 2 content. The ripples in the transmittance spectra decreased with increasing SnO 2 content. Also, the evolution of the optical band gap seems to be consistent with the Raman analysis. A great attention has been paid to the refractive index measurements by the prism coupler technique. In this way, variable-refractive index systems have been successfully obtained using TiO 2 :SnO 2 nanocomposite thin films.

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“…S1, Supporting information), suggesting the formation of a thick T12 layer. Furthermore, upon T12 linkage, evidences of some oxidation processes can be obtained by the decrease of the Ti 2p3/2 lines in the range 455-470 eV, attributed to Ti ions in the lower oxidation states [33]. Fig.…”

Section: Optical and X-ray Photoelectron Spectroscopy Of T12 Adsorbedmentioning

confidence: 90%

A bioinspired dye sensitized solar cell based on a rhodamine-functionalized peptide immobilized on nanocrystalline TiO 2

Caruso

Gatto

Palleschi

et al. 2017

Journal of Photochemistry and Photobiology A: Chemistry

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A B S T R A C TA dodecapeptide (AMRKLPDAPGMH) functionalized with a tetramethylrhodamine (TAMRA) chromophore at the N-terminus was immobilized on nanocrystalline TiO 2 . The optical and binding properties of the peptide layer immobilized on the titania surface were characterized by UV-vis absorption, steadystate fluorescence and X-ray photoelectron spectroscopies. Circular Dichroism experiments and Molecular Mechanics calculations showed that the predominant conformation populated by the peptide scaffold brings Arg3, Lys4 and Asp7 in the correct position for linking the TiO 2 surface. Photocurrent generation experiments were therefore carried out to determine the photon-to-current conversion efficiency (IPCE) of a Grätzel-like Dye Sensitized Solar Cell (DSSC), the photoactive unit of which is formed by TAMRA-AMRKLPDAPGMH/TiO 2 . The measured IPCE amounted to 0.65%, a value that is definitely low, but superior to those previously reported for similar bioinspired DSSCs. This result can be ascribed to the light-harvesting properties of the TAMRA chromophore and to the unique structural properties of the peptide spacer.

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Low-energy electron energy loss spectroscopy of rutile and anatase TiO2 films in the core electron excitation regions

Cited by 18 publications

References 14 publications

Change in the chemical and electronic properties of TiO2/SnO2:F stacked-layers induced by the photocatalytic reaction

Change in the chemical and electronic properties of TiO2/SnO2:F stacked-layers induced by the photocatalytic reaction

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

A bioinspired dye sensitized solar cell based on a rhodamine-functionalized peptide immobilized on nanocrystalline TiO 2

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Low-energy electron energy loss spectroscopy of rutile and anatase TiO2 films in the core electron excitation regions

Cited by 18 publications

References 14 publications

Change in the chemical and electronic properties of TiO2/SnO2:F stacked-layers induced by the photocatalytic reaction

Change in the chemical and electronic properties of TiO2/SnO2:F stacked-layers induced by the photocatalytic reaction

Study of TiO2, SnO2 and nanocomposites TiO2:SnO2 thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

A bioinspired dye sensitized solar cell based on a rhodamine-functionalized peptide immobilized on nanocrystalline TiO 2

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Product

Resources

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Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems