Structural and Mechanical properties of Ti–Si–C–ON for biomedical applications

Abstract

Ti-Si-CON films were deposited by DC reactive magnetron sputtering using different partial pressure of oxygen (p O2) and nitrogen (p N2) ratio. Compositional analysis revealed the existence of two different growth zones for the films; one zone deposited under low p O2 /p N2 and another zone deposited under high p O2 /p N2. The films produced under low p O2 /p N2 were deposited at a lower rate and presented a fcc structure, as well as, dense and featureless morphologies. The films deposited with high p O2 /p N2, consequently higher oxygen content, were deposited at a higher rate and developed an amorphous structure. The structural changes are consistent with the hardness and Young's modulus evolution, as seen by the significant reduction of the hardness and influence on the Young's modulus by increasing p O2 /p N2.

PVD-grown antibacterial Ag-TiN films on piezoelectric PVDF substrates for sensor applications

“…Although there are some biomaterials presenting suitable mechanical properties and low cytotoxicity, they are often prone to microbial colonization [1,2]. This colonization is frequently associated to Staphylococcus epidermidis, being one of the most common bacteria found in orthopaedics prostheses [3,4].…”

XRD and FTIR analysis of Ti–Si–C–ON coatings for biomedical applications

“…In order to change oxygen and nitrogen ratio on the samples, they were grown with different gas fluxes (the N 2 ranging from 6.5 to 0 sccm, and the O 2 from 0 to 5.25 sccm), which resulted on different ratios of the oxygen and nitrogen partial pressures (p O 2 /p N 2 ). Further information about the film deposition can be found elsewhere [6]. The atomic composition of as-deposited samples was measured by Electron Probe Microanalysis (EPMA) and Glow Discharge Optical Emission Spectroscopy (GDOES).…”

“…It is possible to observe changes in chemical composition as a function of the oxygen partial pressure and the nitrogen partial pressure ratio (p O 2 /p N 2 ). Previously, we have already discussed the changes in chemical composition of the films as a function of deposition process parameters [6]. We leave this matter out of the scope of this paper.…”

Films from resistant starch-pectin dispersions intended for colonic drug delivery

“…511 films (Table 4) showed the lowest dissolution values in both gastric and enteric media, probably due to the low proportion of pectin, which has high solubility and high liquid uptake ability (Guimarães et al, 2008;Maior et al, 2008). Dissolution properties were not affected by polymer concentration, but in simulated enteric medium, 511P film presented higher dissolution than 511 W (about 1.5 times), behavior that may be attributed to the hydrophilic nature of propylene glycol, which leads to increased mobility of the polymer chains (Bando & Mcginity, 2006).…”