XPS study on the dispersion of carbon additives in silicon carbide powders

Contarini, S.; Howlett, S. P.; Rizzo, Caterina; Angelis, B.A. De

doi:10.1016/0169-4332(91)90400-e

Cited by 169 publications

(63 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After PLL-g-PEG adsorption there is good agreement with the values of Huang et al [33] (referred to C1s at 284.6 eV). The O1s-Si peak overlaps with the NHC=O, [39]. However, slight discrepancies exist between the present analysis with those of Contarini, including a slightly higher value (285.6 eV) for the C-C/C-H components of the C1s signal than Contarini (285 eV), as well as a slightly higher O1s signal corresponding to the O-Si bond (533 eV compared to 532.3 eV).…”

Section: Xpscontrasting

confidence: 48%

“…The C-Si component of the C1s peak shows a slight shift to 283.2 ± 0.03 eV. The C-C/C-H component is found at 285.6 ± 0.05 eV, which is 0.6 eV higher than the bare SiC value reported by Contarini et al [39] or the theoretical PLL-g-PEG value reported by Huang et al [33], and is shifted by about 1.6 eV from the value measured on bare SiC. Additionally, a C-O/C-N component at 287.2 ± 0.05 eV is shifted 1.4 eV from the measurement on bare SiC, and is around 0.7 eV higher than the theoretical value of the C-O component for PLL-g-PEG.…”

Section: Xpsmentioning

confidence: 44%

“…An iterated Shirley-Sherwood background subtraction was applied before peak fitting using a linear-least-squares algorithm. Minor charging was observed and corrected by referencing, for SiC, to the carbide component of the Si 2p 3/2 peak 100.8, as per Contarini et al [39] and for Si 3 N 4 , to the hydrocarbon component of the C1s peak at 284.6, as per Bertoti et al [40].…”

Section: Adsorption Measurements With Xpsmentioning

confidence: 99%

See 2 more Smart Citations

Aqueous Lubrication of SiC and Si3N4 Ceramics Aided by a Brush-like Copolymer Additive, Poly(l-lysine)-graft-poly(ethylene glycol)

et al. 2009

View full text Add to dashboard Cite

We have examined the adsorption properties of poly(L-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG)-a brush-like polymer-on Si 3 N 4 and SiC surfaces and determined its impact on the aqueous lubrication of Si 3 N 4 and SiC at various speeds and applied loads. The addition of PLL-g-PEG in aqueous solution reduces the interfacial friction forces significantly for self-mated sliding contacts of these two ceramics, as compared to lubrication with water or buffer solution alone. For SiC, the improved lubricating performance by addition of PLL-g-PEG was apparent for all tested speeds (from 1.4 to 185 mm/s under 2 N load). For Si 3 N 4 , the effect was more apparent in the slow-speed regime (B20 mm/s under 2 N load) than in the high-speed regime ([100 mm/s), where extremely low coefficients of friction (l B 0.006) are readily achieved by aqueous buffer solution alone. It was further observed that the optimal lubricating effect with Si 3 N 4 is achieved when the tribopairs are first run-in in polymer-free aqueous buffer to render the sliding surfaces smooth, after which the PLL-g-PEG copolymer is added to the buffer solution.

show abstract

Section: Xpscontrasting

confidence: 48%

Section: Xpsmentioning

confidence: 44%

Section: Adsorption Measurements With Xpsmentioning

confidence: 99%

See 1 more Smart Citation

Aqueous Lubrication of SiC and Si3N4 Ceramics Aided by a Brush-like Copolymer Additive, Poly(l-lysine)-graft-poly(ethylene glycol)

et al. 2009

View full text Add to dashboard Cite

show abstract

“…19,20 The overall intensity of the C 1s emission increased after the 530°C annealing step, presumably due to an insufficient outgassing of the heating stage prior to the experiment. The shape of the C 1s emission after the 530°C anneal was similar to the shape of the C 1s signal observed for the CH 3 -Si(111) surface after a 530°C anneal, indicating that a similar decomposition reaction product formed at this temperature in both cases.…”

Section: Surface Symmetry Of C 2 H 5 -Functionalized Si(111)mentioning

confidence: 99%

High-Resolution Synchrotron Photoemission Studies of the Electronic Structure and Thermal Stability of CH₃- and C₂H₅-Functionalized Si(111) Surfaces

et al. 2007

View full text Add to dashboard Cite

The relative coverage, thermal stability, and electronic properties of CH 3 -and C 2 H 5 -functionalized Si(111) surfaces prepared by a two-step chlorination/alkylation procedure have been compared using high-resolution synchrotron photoemission spectroscopy. Whereas the CH 3 -terminated Si(111) surface showed only one C 2s peak for the occupied σ orbitals, the C 2s spectra of C 2 H 5 -terminated Si(111) surfaces showed a symmetric splitting of the occupied σ orbitals, as expected for an ethyl moiety bonded to the surface. The C 2 H 5 termination resulted in an unpinning of the Si surface Fermi level, with a band bending of ∼0.2 eV, and produced a surface dipole potential step of -0.23(15) eV. The observed close-to-flat-band condition is similar to that of CH 3 -Si(111) and is consistent with H termination of the non-alkylated Si atop sites in the two-step chlorination/ alkylation process. The C 2 H 5 -functionalized Si(111) surfaces decomposed at temperatures >300°C, whereas CH 3 -Si(111) surfaces were stable up to at least 440°C. The data clearly highlight the similarities and identify some significant differences between the behavior of the CH 3 -and C 2 H 5 -functionalized Si(111) surfaces.

show abstract

“…This shift was consistent with that observed by other groups. [34][35][36] Moreover, the shift of Ti (2p) binding energy in PIS6-10-4T at various depths was less significant than that in PIS0-00-4T.…”

Section: Xpsmentioning

confidence: 53%

Effect of TiO₂ on thermal and adhesive characteristics of poly(imide siloxane)/TiO₂ hybrid films

Tseng

Whang

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

A novel poly(imide siloxane)/titania (PIS/ TiO 2 ) hybrid film was fabricated by sol-gel process via in situ formation of TiO 2 within PIS matrix. Poly(amic acid siloxane) (PAAS) was prepared from 4,4 0 -oxydiphthalic anhydride, 2,2-bis [4-(4-aminophenoxy) phenyl] propane, and a,x-bis(3-aminopropyl)polydimethylsiloxane (APPS). Chelating agent, acetylacetone, and catalyst-free polymerization were used to reduce the rate of hydrolysis of titanium alkoxide in the PAAS. X-ray photoelectron spectroscopy data showed that the presence of APPS promotes the Ti surface composition of PIS/TiO 2 hybrid film. The effects of TiO 2 and APPS contents on the characteristics of surface, thermostability, coefficient of thermal expansion (CTE), and the strength of adhesion were investigated. The presence of TiO 2 on the surface of the hybrid films enhanced the adhesive strength at the interface of PIS/TiO 2 hybrid film and copper foil. When more TiO 2 was incorporated into the PIS matrix, the PIS/TiO 2 hybrid film exhibited lower CTE while retaining favorable mechanical and thermal properties.

show abstract

XPS study on the dispersion of carbon additives in silicon carbide powders

Cited by 169 publications

References 9 publications

Aqueous Lubrication of SiC and Si3N4 Ceramics Aided by a Brush-like Copolymer Additive, Poly(l-lysine)-graft-poly(ethylene glycol)

Aqueous Lubrication of SiC and Si3N4 Ceramics Aided by a Brush-like Copolymer Additive, Poly(l-lysine)-graft-poly(ethylene glycol)

High-Resolution Synchrotron Photoemission Studies of the Electronic Structure and Thermal Stability of CH₃- and C₂H₅-Functionalized Si(111) Surfaces

Effect of TiO₂ on thermal and adhesive characteristics of poly(imide siloxane)/TiO₂ hybrid films

Contact Info

Product

Resources

About

XPS study on the dispersion of carbon additives in silicon carbide powders

Cited by 169 publications

References 9 publications

Aqueous Lubrication of SiC and Si3N4 Ceramics Aided by a Brush-like Copolymer Additive, Poly(l-lysine)-graft-poly(ethylene glycol)

Aqueous Lubrication of SiC and Si3N4 Ceramics Aided by a Brush-like Copolymer Additive, Poly(l-lysine)-graft-poly(ethylene glycol)

High-Resolution Synchrotron Photoemission Studies of the Electronic Structure and Thermal Stability of CH3- and C2H5-Functionalized Si(111) Surfaces

Effect of TiO2 on thermal and adhesive characteristics of poly(imide siloxane)/TiO2 hybrid films

Contact Info

Product

Resources

About

High-Resolution Synchrotron Photoemission Studies of the Electronic Structure and Thermal Stability of CH₃- and C₂H₅-Functionalized Si(111) Surfaces

Effect of TiO₂ on thermal and adhesive characteristics of poly(imide siloxane)/TiO₂ hybrid films