Si-rich a-Si1−xCx thin films by d.c. magnetron co-sputtering of silicon and silicon carbide: Structural and optical properties

Ouadfel, M.A.; Keffous, A.; Brighet, Amer; Gabouze, N.; Hadjersi, Toufik; Cheriet, A.; Kechouane, M.; Boukezzata, A.; Boukennous, Y.; Belkacem, Y.; Menari, H.

doi:10.1016/j.apsusc.2012.10.129

Cited by 21 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As it can be observed, the IR bands became wider and shifted towards lower wavenumbers after the addition of SiC into the HAp structure. Moreover, no specific absorption bands located between 770 and 680 cm −1 [34,80] , corresponding to SiC stretching bonds, were revealed by FTIR analysis. Thus, it can be assumed that the addition of SiC led to some modifications in the HAp structure; some additional bands at 928 and 906 cm −1 were observed.…”

Section: Xrd After Immersion In Dmem Sbf and Pbsmentioning

confidence: 91%

In Vitro Activity Assays of Sputtered HAp Coatings with SiC Addition in Various Simulated Biological Fluids

et al. 2019

View full text Add to dashboard Cite

Considering the requirements of medical implantable devices, it is pointed out that biomaterials should play a more sophisticated, longer-term role in the customization and optimization of the material–tissue interface in order to ensure the best long-term clinical outcomes. The aim of this contribution was to assess the performance of silicon carbide–hydroxyapatite in various simulated biological fluids (Dulbecco’s modified Eagle’s medium (DMEM), simulated body fluid (SBF), and phosphate buffer solution (PBS)) through immersion assays for 21 days at 37 ± 0.5 °C and to evaluate the electrochemical behavior. The coatings were prepared on Ti6Al4V alloy substrates by magnetron sputtering method using two cathodes made of hydroxyapatite and silicon carbide (SiC). After immersion assays the coating’s surface was analyzed in terms of morphology, chemical and phase composition, and chemical bonds. According to the electrochemical behavior in the media investigated at 37 ± 0.5 °C, SiC addition inhibits the dissolution of the hydroxyapatite in DMEM acellular media. Furthermore, after adding SiC, the slow degradation of hydroxyapatite in PBS and SBF media as well as biomineralization in DMEM were observed.

show abstract

Section: Xrd After Immersion In Dmem Sbf and Pbsmentioning

confidence: 91%

In Vitro Activity Assays of Sputtered HAp Coatings with SiC Addition in Various Simulated Biological Fluids

et al. 2019

View full text Add to dashboard Cite

show abstract

“…It can be found that the position of Raman peak is slightly downshifted with respect to the peak position of mono-crystalline Si (520 cm −1 ) by about 3 cm −1 for the sample with R = 1 and 1 cm −1 for the sample with R = 5. The red shift compared with a Raman peak from mono-crystalline Si reveals the confinement of optical phonons due to the small grain size in films [20]. According to the empirical formula: D R = 2π √ B/∆ω, where D R is the mean size of Si NC in diameter, B is 2.24 cm −1 for Si and ∆ω is the Raman shift of crystalline peak from mono-crystalline peak located at 520 cm −1 , respectively [21], the Raman peaks shift to lower wave numbers by values of ∆ω = 1~3 cm −1 may be caused by Si NCs sizes of around 5.4~9.4 nm, which indicates the mean size of Si NCs are increased with the Si/C ratio in B-doped Si NCs:a-SiC films.…”

Section: Nanostructurementioning

confidence: 95%

Structures, Electronic Properties and Carrier Transport Mechanisms of Si Nano-Crystalline Embedded in the Amorphous SiC Films with Various Si/C Ratios

et al. 2021

View full text Add to dashboard Cite

Recent investigations of fundamental electronic properties (especially the carrier transport mechanisms) of Si nanocrystal embedded in the amorphous SiC films are highly desired in order to further develop their applications in nano-electronic and optoelectronic devices. Here, Boron-doped Si nanocrystals embedded in the amorphous SiC films were prepared by thermal annealing of Boron-doped amorphous Si-rich SiC films with various Si/C ratios. Carrier transport properties in combination with microstructural characteristics were investigated via temperature dependence Hall effect measurements. It should be pointed out that Hall mobilities, carrier concentrations as well as conductivities in films were increased with Si/C ratio, which could be reached to the maximum of 7.2 cm2/V∙s, 4.6 × 1019 cm−3 and 87.5 S∙cm−1, respectively. Notably, different kinds of carrier transport behaviors, such as Mott variable-range hopping, multiple phonon hopping, percolation hopping and thermally activation conduction that play an important role in the transport process, were identified within different temperature ranges (10 K~400 K) in the films of different Si/C ratio. The changes from Mott variable-range hopping process to thermally activation conduction process with temperature were observed and discussed in detail.

show abstract

“…As it can be noticed in Figure 5, the IR bands attributed to pure HA coating became wider and shift towards lower wavenumbers after SiC or SiC and Ag were added into the HA structure. Note that no specific absorption bands located between 770 and 680 cm −1 [58,59], corresponding to the SiC stretching bond, were revealed via FT-IR analysis. Previous IR studies have shown that the structure of HA remains unaffected after Ag addition [60,61], whereas SiC addition leads to crystallinity decrease in HA coatings [53], confirmed by our XRD results.…”

Section: Surface Morphology Elemental and Phase Composition Of The In...mentioning

confidence: 99%

SiC- and Ag-SiC-Doped Hydroxyapatite Coatings Grown Using Magnetron Sputtering on Ti Alloy for Biomedical Application

et al. 2022

View full text Add to dashboard Cite

SiC- and Ag-SiC-doped hydroxyapatite (HA) coatings were deposited via magnetron sputtering aiming at increased corrosion protection of Ti-10Nb-10Zr-5Ta alloy in simulated body fluid environment and superior mechanical properties compared to plain hydroxyapatite. The coatings had a total thickness of about 350 nm. The X ray diffraction patterns indicate that HA coatings are polycrystalline with a hexagonal structure and the addition of SiC determined the coating amorphization. All coatings presented a lower roughness compared to the Ti alloy and were hydrophilic. Ag-SiC-HA coating presented the best corrosion resistance and tribological parameters. All coatings were biocompatible, as ascertained via indirect cytocompatibility studies conducted on Vero cells.

show abstract

Si-rich a-Si1−xCx thin films by d.c. magnetron co-sputtering of silicon and silicon carbide: Structural and optical properties

Cited by 21 publications

References 38 publications

In Vitro Activity Assays of Sputtered HAp Coatings with SiC Addition in Various Simulated Biological Fluids

In Vitro Activity Assays of Sputtered HAp Coatings with SiC Addition in Various Simulated Biological Fluids

Structures, Electronic Properties and Carrier Transport Mechanisms of Si Nano-Crystalline Embedded in the Amorphous SiC Films with Various Si/C Ratios

SiC- and Ag-SiC-Doped Hydroxyapatite Coatings Grown Using Magnetron Sputtering on Ti Alloy for Biomedical Application

Contact Info

Product

Resources

About