Interference-Enhanced Raman Scattering of Very Thin Titanium and Titanium Oxide Films

Nemanich, R. J.; Tsai, C. C.; Connell, G. A. N.

doi:10.1103/physrevlett.44.273

Cited by 127 publications

(72 citation statements)

References 8 publications

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“…The peak located at 141 cm −1 matches the value of (135 ± 2) cm −1 reported by Nemanich et al for the E 2g mode of the hexagonal close-packed phase of a 6 nm thick titanium film [19]. The origin of the other specific peaks at 93, 108, and 337 cm −1 is currently not clear.…”

Section: Structural Analysis: Micro Raman Spectroscopysupporting

confidence: 59%

Tribological performance of titanium samples oxidized by fs-laser radiation, thermal heating, or electrochemical anodization

et al. 2018

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Commercial grade-1 titanium samples (Ti, 99.6%) were treated using three alternative methods, (i) femtosecond laser processing, (ii) thermal heat treatment, and (iii) electrochemical anodization, respectively, resulting in the formation of differently conditioned superficial titanium oxide layers. The laser processing (i) was carried out by a Ti:sapphire laser (pulse duration 30 fs, central wavelength 790 nm, pulse repetition rate 1 kHz) in a regime of generating laser-induced periodic surface structures (LIPSS). The experimental conditions (laser fluence, spatial spot overlap) were optimized in a sample-scanning setup for the processing of several square-millimeters large surface areas covered homogeneously by these nanostructures. The differently oxidized titanium surfaces were characterized by optical microscopy, micro Raman spectroscopy, variable angle spectroscopic ellipsometry, and instrumented indentation testing. The tribological performance was characterized in the regime of mixed friction by reciprocating sliding tests against a sphere of hardened steel in fully formulated engine oil as lubricant. The specific tribological performance of the differently treated surfaces is discussed with respect to possible physical and chemical mechanisms.

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Section: Structural Analysis: Micro Raman Spectroscopysupporting

confidence: 59%

Tribological performance of titanium samples oxidized by fs-laser radiation, thermal heating, or electrochemical anodization

et al. 2018

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“…Due to the larger film thickness, the signals in this spectrum are much stronger. However, even the thick oxide film exhibits only the characteristic signals for anatase, no rutile modification or signals due to reduced titanium oxides (like Ti 2 O 3 ) [76,77] are visible.…”

Section: Sample Characterizationmentioning

confidence: 99%

Strong metal–support interactions on rhodium model catalysts

Linsmeier

Taglauer

2011

Applied Catalysis A: General

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Reactive processes on catalyst surfaces are studied in this work for Rh/metal oxide model systems by means of surface science techniques. Published results in the literature deal with titania, alumina, and silica as support materials and are briefly reviewed. For the present studies Rh/Al 2 O 3 and Rh/TiO 2 model catalysts with about one monolayer Rh coverage are specially prepared and analyzed by ion scattering spectroscopy, X-ray photoelectron spectroscopy, and thermal desorption measurements as main techniques. In part these measurements are supported by a variety of other analytical and imaging techniques. For thermal treatment in hydrogen atmosphere at low and elevated pressures a complete Rh encapsulation by titania is observed for temperatures above 773 K. The results from ion bombardment depth profiling are corroborated by the concomitant drastic reduction of the CO adsorption capacity of these samples. The model catalysts thus exhibit the typical features of 'strong metal-support interaction'. The effect was not found for alumina supports, for which thermal treatments mainly resulted in gradual interdiffusion of the various surface species. These results also demonstrate that characteristic catalyst behavior can be successfully studied by applying surface science methods to model catalysts.

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“…Or consist of some mixture of metallic Ti, TiN and titanium oxide. All these materials exhibit rather similar Raman spectra [4] and, taking in account the small intensity of the spectra obtained from present measurements it is impossible to conclude about the nature of grown material.…”

Section: Discussionmentioning

confidence: 90%

Preparing of the Chameleon Coating by the Ion Jet Deposition Method

Skočdopole

Aversa

Golan

et al. 2017

APP

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Abstract. Preparation of chameleon coatings using an Ionized Jet Deposition (IJD) technique is reported in the present paper. IJD is a new flexible method for thin film deposition developed by Noivion, Srl. The chameleon coatings are thin films characterised by a distinct change of their tribological properties according to the external conditions. The deposited films of SiC and TiN materials were examined by the Raman spectroscopy, SEM and XPS. The results of the Raman spectroscopy have proved an amorphous structure of SiC films. The data from XPS on TiN films have shown that the films are heavily oxidized, but also prove that the films are composed of TiN and pure Ti. The SEM provided information about the size of grains and particles constituting the deposited films, which is important for tribological properties of the films. Deposition of the chameleon coating is very complex problem and IJD could be ideal method for preparation of this coating.

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Interference-Enhanced Raman Scattering of Very Thin Titanium and Titanium Oxide Films

Cited by 127 publications

References 8 publications

Tribological performance of titanium samples oxidized by fs-laser radiation, thermal heating, or electrochemical anodization

Tribological performance of titanium samples oxidized by fs-laser radiation, thermal heating, or electrochemical anodization

Strong metal–support interactions on rhodium model catalysts

Preparing of the Chameleon Coating by the Ion Jet Deposition Method

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