This work is focused on the structural and morphological investigations of polyaniline poly(o-anisidine) polymers generated in a direct current glow discharge plasma, vapors monomers, without buffer gas, using an oblique angle-positioned substrate configuration. By atomic force microscopy scanning electron we identified formation worm-like interlinked structures surface layers, layers being compact bulk. The are flat with no kind their surfaces. Fourier transform infrared spectroscopy main...

This work reports on the influence of 5 MeV electron beam radiations morphological features and chemical structure magnesium-doped hydroxyapatite/chitosan composite coatings generated by magnetron sputtering technique. The exposure to ionizing radiation in a linear accelerator dedicated medical use has been performed controllable manner delivering up 50 Gy dose fractions 2 per 40 s. After irradiation with beams, surface layers became nano-size structured. partial detachment irradiated from...

Modern medicine is still struggling to find new and more effective methods for fighting off viruses, bacteria fungi. Among the most dangerous at times life-threatening fungi Candida albicans. Our work focused on surface structural characterization of hydroxyapatite, silver doped hydroxyapatite zinc deposited a titanium substrate previously coated with polydimethylsiloxane (HAp-PDMS, Ag:HAp-PDMS, Zn:HAp-PDMS) by different techniques: Scanning Electron Microscopy (SEM), Glow Discharge Optical...

This study aimed at developing an antimicrobial material based on hydroxyapatite (HAp) and peppermint essential oil (P-EO) in order to stimulate the activity of hydroxyapatite. The molecular spectral features morphology P-EO, HAp coated with (HAp-P) were analyzed using Fourier-transform infrared (FTIR) spectroscopy scanning electron microscopy (SEM). coating P-EO did not affect ellipsoidal shape nanoparticles. overlapping IR bands HAp-P spectrum determined formation broad that observed...

Antibacterial cerium-doped hydroxyapatite (Ce-HAp) layers have been researched sparingly in recent years. The Ce-HAp powder, Ca10−xCex(PO4)6(OH)2 with xCe = 0.05, was obtained by an adapted chemical co-precipitation method at room temperature. target prepared using the (xCe 0.05) powder sintered air 600 °C. coatings on Ti substrate were generated plasma a radio frequency (RF) magnetron sputtering discharge Ar gas flow single run. To collect most complete information regarding antimicrobial...

In this paper, we present the development of magnesium-doped hydroxyapatite in chitosan matrix (MHA_Ch) powder by an adapted coprecipitation method. The MHA_Ch was then deposited as thin layers radio frequency magnetron sputtering. were exposed to various irradiation doses and immersed Dulbecco’s Modified Eagle’s Medium (DMEM) for time intervals. We report, first time, effects DMEM on irradiated a matrix. surface morphology before after immersion evaluated SEM, AFM, MM studies. Additionally,...

Magnesium-doped hydroxyapatite/chitosan composite coatings produced by the radio-frequency magnetron sputtering technique were exposed to 5 MeV electron beams of 8 and 30 Gy radiation doses in a linear accelerator. The surfaces unirradiated layers are smooth, while irradiated ones exhibit nano-structures with sizes that increase from 60 nm at dose 200 dose. Young's modulus stiffness decrease 58.9 GPa 10 µN/nm 2.2 µN/nm, respectively, when increased 0 Gy. These data suggest diminishing...

The goal of this study was the preparation, physicochemical characterization, and microbiological evaluation novel hydroxyapatite doped with silver/polydimethylsiloxane (Ag:HAp-PDMS) composite layers. In first stage, deposition polydimethylsiloxane (PDMS) polymer layer on commercially pure Si disks has been produced in atmospheric pressure corona discharges. Finally, new silver hydroxyapatite/polydimethylsiloxane obtained by thermal evaporation technique. Ag:HAp-PDMS layers were...

By combining the reflection‐absorption infrared spectral studies with peak fitting analysis we determined type of silicon oxides present in polydimethylsiloxane layers obtained on germanium and aluminium substrates corona discharges. We have also evidenced that dependence density discharge current intensity is related to existence a concurrent anodizing process occurring at polymer/Al substrate interface. The morphology Al surface investigated by scanning electron microscopy proved occurs.

The inhibitory and antimicrobial effects of silver particles have been known since ancient times. In the last few years, a major health problem has arisen due to pathogenic bacteria resistance agents. antibacterial activities new materials including hydroxyapatite (HAp), silver-doped (Ag:HAp) various types antibiotics such as tetracycline (T-HAp T-Ag:HAp) or ciprofloxacin (C-HAp C-Ag:HAp) not studied so far. this study we reported, for first time, preparation characterization thin films...

The research conducted in this study presented for the first time results of physico-chemical properties and vitro antimicrobial activity hydroxyapatite plant essential oil against Gram-positive bacteria (methicillin-resistant Staphylococcus aureus (MRSA) S. 0364) Gram-negative (Escherichia coli ATCC 25922). samples were studied by scanning electron microscopy (SEM) Fourier transform infrared (FTIR) spectroscopy to determine morphology structure nanocomposites coated with basil (HAp-B)...

Post-implant infections are a major health problem, and it is well-known that treating them with conventional drugs accompanied by many disadvantages. The development of new biomaterials enhanced antimicrobial properties interest for the scientific world. aim this study was to synthesize characterize hydroxyapatite doped Samarium (Ca10−xSmx(PO4)6(OH)2, xSm = 0.05, 5Sm-HAp) suspensions, pellets coatings. 5Sm-HAp coatings on Si substrates were obtained rf magnetron sputtering technique....

Chitosan–hydroxyapatite composite layers were deposited on Si substrates in radio frequency magnetron sputtering discharges. The plasma parameters calculated from the current–voltage frequency-compensated Langmuir probe characteristics indicate a huge difference between electron temperature and at sample holder. These findings aid understanding of coagulation pattern hydroxyapatite–chitosan macromolecules substrate surface. An increase sizes spherical-shape grain-like structures formed...

There is significant research showing that essential oils extracted from the plants have antibacterial effects. The purpose of this study was to develop a biocomposite based on hydroxyapatite coated with

In this work results are presented on the evaluation of HAp, HApSr, HAp_CS, and HApSr_CS layers deposited Ti substrates regarding L929 cell viability cytotoxicity as well antimicrobial activity against Staphylococcus aureus, in connection with their physicochemical properties. The HAp HApSr generated by radio-frequency magnetron sputtering technique were further covered chitosan a matrix-assisted pulsed laser evaporation technique. During plasma depositions, heated externally home-made oven...

We investigate by different complementary methods the processes occurring when a polydimethylsiloxane film is used as interlayer for silver doped hydroxyapatite coating. The X‐ray diffraction and Fourier Transform Infrared Spectroscopy measurements show that with in crystalline form some ions formation takes place at surface bulk of new silver/polydimethylsiloxane composite layer. possibility incorporation structure mechanism / substitution analysed. formed...

The goal of this paper was to investigate the antifungal activity Enamel layers deposited on titanium substrate (Ti-Enamel) and previously coated with a vinyl polydimethylsiloxane layer (Ti-PDMS-Enamel). physicochemical properties were also investigated. Candida albicans biofilm development obtained examined after 24 h, 48 72 h by confocal laser scanning microscopy (CLSM) electron (SEM) ethidium bromide staining. A significant inhibition fungal adherence observed Ti-Enamel layers. results...

In this study, the results about influence of surface morphology layers based on montmorillonite (MMT) and silver (Ag) antimicrobial properties are reported. The coating depositions were performed in plasma a radio frequency (RF) magnetron sputtering discharge. studied single silver/montmorillonite multilayers (MMT-Ag) obtained by technique with different thickness. resultant MMT-Ag biocomposite exhibited uniform distribution constituent elements enhanced against fungal biofilm development....

In this study, we develop chitosan–hydroxyapatite (CS–HAp) composite layers that were deposited on Si substrates in radio frequency (RF) magnetron sputtering discharge argon gas. The composition and structure of CS–HAp investigated by analytical techniques, such as Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), metallographic (MM), atomic force (AFM). On the other hand, present study second order derivative FT-IR–ATR spectra, for compositional analyses...

In this work, we report the synthesis of calcium phosphate-chitosan composite layers. Calcium phosphate layers were deposited on titanium substrates by radio-frequency magnetron sputtering technique varying substrate temperature from room (25 °C) up to 100 and 300 °C. Further, chitosan was matrix-assisted pulsed laser evaporation The at during deposition process plays an important role in embedding chitosan, as scanning electron microscopy analysis showed. degree incorporation into...

Calcium phosphate coatings were deposited on thermally sensitive polyprophylene substrates in radio frequency (rf) magnetron sputtering discharge. The steady state of the deposition plasma and its components identified by rate measurements mass spectrometry. Low rf powers rates, with a 10 min on/off temporal scheme, established as suitable experimental conditions for calcium layers thermoplastic polymers. By scanning electron microscopy atomic force microscopy, influence polymer substrate...