C Is XPS spectrum

Fig. 2.14. The C Is XPS spectra recorded by Chin-An Chang et al. [2.68] from perfluoroalkoxy polymer (PFA). (a) before deposition, (b) deposition of copper, (c) deposition of chromium,...

C Is XPS spectra for the treated surfaces are not well resolved. From the deconvoluted spectra, the decreases in the main contamination peak at 284.8 eV, and the other two peaks at 1.7 and 4.0 eV higher binding energy (BE) can be followed. The intensities of these peaks are notably much lower in the oxide samples as compared with those of Y58 wafers, consistent with the lower density of surface silanols or contamination adsorption sites between the two surfaces. After vapor-phase HMDS treatment, the contribution of these peaks is greatly reduced and a new main C Is peak centered at 284.6 eV appears, as for the Y58 samples, which is assigned to the —CH3 group, due to the HMDS stabilization reaction. 

Figure 4. C( Is) XPS spectra, primer film. (A) 15° exit angle (B) 30° exit angle.

In figure 14.11, the C Is XPS spectra are given of the aminopropylsilica at different stages of thermal treatment. Experiments were performed using silica coated with a polymerized silane layer. Deconvoluted peak positions and relative percentages are indicated in the figure. 

A series of C Is XPS spectra obtained during irradiation with 1,190 eV X-rays is shown in Fig. 8. Photolysis results in a decrease in intensity of the C-H and C-O peaks and an increase in the C-M intensity. The C-H peak also shifts to lower binding energy. This shift is mainly due to C-O bond cleavage, which lowers the... 

Fig. 8 Series of C Is XPS spectra of (R)-2-butanol adsorbed on permalloy obtained sequentially while irradiating with 1,190-eV X-rays. The inset shows the area of the C-O peak component as a function of irradiation time...

Figure 7. The C-Is XPS spectra for polypropylene, polymethylmethacrylate, and Nylon 6,6 treated in the plasma...

Figure 2.12 (a) Temperature-programmed C Is XP spectra of a reacting crotyl alcohol adlayer over Pd(l 1 1). (b) Reaction pathway for the oxidative dehydrogenation of crotyl alcohol to crotonaldehyde, highlighting competing low-temperature dehydration and ambient temperature decarbonylation routes. (Reprinted with permission from Ref. [85]. Copyright 2007, American Chemical Society.)... 

Figure 2.14 (a) Temperature-programmed C Is XP spectra of reacting saturation ethanol adlayer over Pt(l 11) highlighting different surface-reactive intermediates, (b) Exemplar high-resolution C Is at 271 K spectra showing coexistence of reactively formed surfece acetyl, CO, and methyl species. (Adapted from Ref [169). Copyright 2004, with permission from Elsevier.)... 

VASE measurements reveal a thickness of 1.3—1.4 nm for densely packed monolayers of PFAND. The difference between molecular length (Rs 2.1 nm) and measured adlayer thickness is attributed to three considerations (i) relaxed PFAND molecules are most likely not straight but helical and bent as in the case of fluorinated alkyl thiols, (ii) adsorbed PFAND molecules, as fluorinated alkyls, might be tilted with respect to the surface normal by 30°-35° to optimize packing and intermolecular interactions, and (iii) VASE-determined thickness is systematically underestimated by the layer model that was employed, because of adventitious carbon/contamination, which is constantly replaced by PFAND during adsorption, a process referred to as self-cleaning by Buck et al. for thiols on gold. Comparison of C Is XP spectra allows an estimation of the replacement of surface contamination the amount of contamination on clean TiO surfaces is equivalent to a fraction (20-25%) of what is... 

Fig. 9. High-resolution C Is XPS spectra for Ma-APTES2 from Table 2 (Durdureanu-Angheluta et al., 2011b).

Figure 10.19. C Is XP spectra (left panel), and UVP spectra (right panel) of all Rn-based samples, as prepared and after reduction [159]. (Reproduced from Applied Surface Science, 238(1—4), Guraya M, Sprenger S, Rarog-Pilecka W, Szmigiel D, Kowalczyk Z, Muhler M. The effect of promoters on the electronic structure of ruthenium catalysts supported on carbon, 77-81, 2004, with permission from Elsevier.)...

Fig. 9 a) C Is XPS spectra of aGO and bwGO. b) Raman spectra of aGO and bwGO obtained using a 633 nm laser excitation. (Reproduced with permission.)... 

Figure 9. Almninum (Is) XPS spectra following various stages of treatment A. untreated catalyst B. 200°C for 12 hours in 10% hydrogen/90% helium C. as B., but following additional 12 hours at 200°C in 10% oxygen/ 90% helium.

Figure 3.10 XPS spectra in the range from 150 to 200 eV, showing the Zr 3d and Si 2s peaks of the 7.r02/Si02 catalysts after calcination at 700 °C. All XPS spectra have been corrected for electrical charging by positioning the Si 2s peak at 154 eV. The spectra labeled nitrate correspond to the catalysts prepared by incipient wetness impregnation with an aqueous solution of zirconium nitrate, and the spectrum labeled ethoxide to that prepared by contacting the support with a solution of zirconium ethoxide and acetic acid in ethanol. The latter preparation leads to a better Zr02 dispersion over the Si02 than the standard incipient wetness preparation does, as is evidenced by the high Zr 3d intensity of the bottom spectrum (adapted from Meijers et at, [33]).

Figure 29. C Is and O Is XPS spectra for fresh, precycled, and stored graphite anodes. (Reproduced with permission from ref 294 (Figure 17). Copyright 2002 The Electrochemical Society.)...

Figure 1. C Is X-Ray Photoelectron Spectra (XPS) of interfacial surfaces of adhesive C showing (a) C Is XPS spectrum of untested Adhesive C surface having peaks at 285.0 eV, 285.8 eV, 286.8 eV, and 289.3 eV (b) C Is XPS spectrum of interfacialAdhesive C polymer surface after corrosion showing peaks identical to (a) (c) C Is XPS spectrum of interfacial Adhesive C metal surface after corrosion showing components at 285.0 eV, 286.1 eV, 287.3 eV, and 288.9 eV (d) C Is XPS spectrum of cold rolled steel standard showing peaks at 285.0 eV, 286.5 eV, and 288.7 eV.

Fig. 5.26 N Is XPS spectra for samples A-C with respective nitrogen doping levels [99].

In Fig. 7, the difference in C Is ESCA spectra for vapor phase HMDS vs. liquid phase silane treatments is provided. The C Is XPS spectral changes are... 

Fig. 14.4 Carbon Is XPS spectra of a clean SWNT film (black) and SWNT film after hydrogenation (blue). Peak 1 at higher energy (lower binding energy) corresponds to the signal from carbon atoms unaffected by hydrogenation whereas peak 2 at lower energy is due to hydrogen-coordinated carbon atoms. The theoretical values of the carbon 1 score-level chemical shifts due to C-H bond formation for different types of SWNTs are shown as vertical lines...

Figure 2. C Is XPS core level spectra of benzene on copper.

Figure 4. C Is, 0 Is, and N Is XPS spectra of benzene-phthalimide (BPIM) on copper.

Figure 5. O Is XPS spectra of Pb phthalocyanine thin films after different treatments. a as preparation imder UHV(ultra-high-vacuum) conditions, b afler exposure of UHV-prepared films to air, c afler the air-exposed filmes in SOOmbar O2 at 423K[7].

Fig. 19. High-resolution (A) C(ls) and (B) 0( Is) XPS spectra of a plasma polymerized acetylene film with a thickness of 75 nm that was deposited onto a polished steel substrate. Reproduced by pennission of John Wiley and Sons from Ref. 122].

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