Nitrogen diffusion enhancement in a ferrous alloy by deuterium isotopic effect

Figueroa, Carlos A.; Czerwiec, T.; Driemeier, Carlos; Baumvol, Israel Jacob Rabin; Weber, S.

doi:10.1063/1.2737956

Cited by 2 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1e-f) demonstrated that an increase in the power to 250 W led to the destruction of the surface layers of the ammonia plasma-treated P3HB. It could be caused by hydrogen, which acts as a chemical agent and etches oxygen from the surface [17,27].…”

Section: Introductionmentioning

confidence: 99%

Surface wettability and energy effects on the biological performance of poly-3-hydroxybutyrate films treated with RF plasma

Syromotina

Surmenev

Boyandin

et al. 2016

Materials Science and Engineering: C

View full text Add to dashboard Cite

АbstractThe surface properties of poly-3-hydroxybutyrate (P3HB) membranes were modified using oxygen and an ammonia radio-frequency (RF, 13.56 MHz) plasma. The plasma treatment procedures used in the study only affected the surface properties, including surface topography, without inducing any significant changes in the crystalline structure of the polymer,with the exception being a power level of 250W. Thewettability of themodified P3HB surfaces was significantly increased after the plasma treatment, irrespective of the treatment procedure used. Itwas revealed that both surface chemistry and surface roughness changes caused by the plasma treatment affected surface wettability. A treatment-induced surface aging effect was observed and resulted in an increase in the water contact angle and a decrease in the surface free energy. However, the difference in the water contact angle between the polymers that had been treated for 4 weeks and the untreated polymer surfaces was still significant. A dependence between cell adhesion and proliferation and the polar component of the surface energy was revealed. The increase in the polar component after the ammonia plasma modification significantly increased cell adhesion and proliferation on biodegradable polymer surfaces compared to the untreated P3HB and the P3HB modified using an oxygen plasma.

show abstract

Section: Introductionmentioning

confidence: 99%