Nanostructured tungsten oxide with controlled properties: Synthesis and Raman characterization

Baserga, A.; Russo, Valeria; Fonzo, Fabio Di; Bailini, A.; Cattaneo, D.; Casari, Carlo Spartaco; Bassi, Andrea; Bottani, C. E.

doi:10.1016/j.tsf.2006.11.067

Cited by 132 publications

(84 citation statements)

References 24 publications

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“…and 960 cm -1 can be assigned to a mixture of iron and tungsten oxides. This latter peak is usually assigned in the literature to the stretching mode of W=O double bonds that appear on the boundaries of amorphous or nanostructured tungsten oxides [36]. These results correlate with the strong interaction of the steel counterpart with the film surface for samples R0 and R0.1 whose wear rate was not possible to be measured.…”

Section: Jc Sanchez-lopez Et Al (Paper B6-2-1)supporting

confidence: 54%

Metal carbide/amorphous C-based nanocomposite coatings for tribological applications

Sánchez-López

Martínez-Martínez

Abad

et al. 2009

Surface and Coatings Technology

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This paper tries to assess the factors governing the tribological behaviour of different nanocomposites films composed by metallic carbides (MeC) mixed with amorphous carbon (a-C). Different series of MeC/a-C coatings (with Me: Ti(B) and W) were prepared by magnetron sputtering technique varying the power applied to the graphite target in order to tailor the carbon content into the films. A deep investigation of the chemical and structural features at the nano-scale is carried out by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron energy-loss spectroscopy (EELS) and Raman spectroscopy techniques in order to establish correlations with the tribological properties measured by a pin-on-disk tribometer in ambient air. The analysis of the counterfaces by Raman confocal microscopy after the friction tests is used to follow the chemical phenomena occurring at the contact area responsible of the observed friction behaviour. The importance of determining the nanocrystalline/amorphous ratio is highlighted as a key-parameter to control the tribological properties. A comparative analysis of the mechanical and tribological performance of the three systems (TiC/a-C, WC/a-C, TiBC/a-C) is done and conclusions are obtained concerning the friction and wear mechanism involved.

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Section: Jc Sanchez-lopez Et Al (Paper B6-2-1)supporting

confidence: 54%

Metal carbide/amorphous C-based nanocomposite coatings for tribological applications

Sánchez-López

Martínez-Martínez

Abad

et al. 2009

Surface and Coatings Technology

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“…By exploiting the method described here we demonstrated, for a number of oxides (e.g. WO 3 , Ag 4 O 4 , Al 2 O 3 and TiO 2 ), the capability to tune morphology, density, porosity, degree of structural order, stoichiometry and phase by modifying the material structure at the nanoscale [6][7][8][9][10][11] . This allows the design of materials for specific applications [12][13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition

Gondoni

Ghidelli

Fonzo

et al. 2013

JoVE

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Nanosecond Pulsed Laser Deposition (PLD) in the presence of a background gas allows the deposition of metal oxides with tunable morphology, structure, density and stoichiometry by a proper control of the plasma plume expansion dynamics. Such versatility can be exploited to produce nanostructured films from compact and dense to nanoporous characterized by a hierarchical assembly of nano-sized clusters. In particular we describe the detailed methodology to fabricate two types of Al-doped ZnO (AZO) films as transparent electrodes in photovoltaic devices: 1) at low O 2 pressure, compact films with electrical conductivity and optical transparency close to the state of the art transparent conducting oxides (TCO) can be deposited at room temperature, to be compatible with thermally sensitive materials such as polymers used in organic photovoltaics (OPVs); 2) highly light scattering hierarchical structures resembling a forest of nano-trees are produced at higher pressures. Such structures show high Haze factor (>80%) and may be exploited to enhance the light trapping capability. The method here described for AZO films can be applied to other metal oxides relevant for technological applications such as TiO

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“…Energy absorption from the laser leads to target ablation and to formation of plasma that expands inside the chamber and then recondenses on a substrate where film growth takes place 13 . The control on plasma expansion dynamics allows to obtain films with tailored morphology 14 , pores size 15 and structure 16 .…”

Section: Introductionmentioning

confidence: 99%

Titanium Dioxide Coated MALDI Plate for On Target Analysis of Phosphopeptides

et al. 2009

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Protein phosphorylation controls many cellular processes and activities. One of the major challenges in the proteomic study of phosphorylation is the enrichment of substoichiometric phosphorylated peptides from complex mixtures. Titanium dioxide (TiO2)-based chromatography is now widely applied to isolate phosphopeptides because of its efficiency and flexibility. In this study, a novel TiO2 coated matrix assisted laser desorption ionization plate is presented and tested for the purification of phosphopeptides from complex mixtures. The novel feature of this approach is the deposition of a nanostructured TiO2 film on stainless steel plates by pulsed laser deposition (PLD). By using tryptic digests of α-casein, β-casein, and other nonphosphorylated proteins, the successful enrichment of phosphopeptides was possible with this novel device, called T-plate, even when working in the low fmol range, making the sample ready for mass spectrometric analysis in few minutes.

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Nanostructured tungsten oxide with controlled properties: Synthesis and Raman characterization

Cited by 132 publications

References 24 publications

Metal carbide/amorphous C-based nanocomposite coatings for tribological applications

Metal carbide/amorphous C-based nanocomposite coatings for tribological applications

Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition

Titanium Dioxide Coated MALDI Plate for On Target Analysis of Phosphopeptides

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