RF plasma treatment

Ortiz-Magan A.B., Pastor-Bias M.M., Eerrandiz-Gomez T.P., Morant-Zacares C., and Martfn-Martfnez J.M., 2001, Surface modifications produced by N2 and O2 RF-plasma treatment on a synthetic vulcanised rubber. Plasmas Polym., 6(1,2), 81-105. 

Biro, D.A., Pleizeier, G, and Deslandes, Y. (1993b). Application of the microbond technique. IV. Improved fiber matrix adhesion by RF plasma treatment of organic fibers. J. Appl. Polym. Sci. 47. 883-894. 

Figure 2. Low-resolution XPS spectra of a pyrolytic graphite electrode surface. Key A, prior to modification B, following a l-h 02 rf plasma treatment C, after reduction with LiAlHi D, after modification with cyanuric chloride E, after attachment of hydroxymethyl ferrocene and F, following electrolysis in pH 7 phosphate buffer.

Figure 10. Laser Raman spectra of Tokai glassy carbon surfaces. Key A, as polished B, following a 3-min 02 rf plasma treatment and C, following reduction with LiAlHk. (Reproduced, with permission, from Ref. 132.)...

Contrary to the above mentioned technologies, which are based on arc plasma furnaces, a radiofrequency (RF) plasma system can process fine powders without granulation in a continuous operation. This possibility, together with the advantageous features of the thermal plasmas mentioned above, offer great perspectives for the synthesis of special ceramic powders such as spinel ferrites [5]. The RF plasma treatment produces nanosized metal and/or oxide powders depending on the parameters of processing. In this paper application of an RF thermal plasma system for the treat-... 

Figure 30.8 Adhesion improvement of Parylene C to TMS or TMS/CH4 plasma pol5rmer coated 7075-T6 panels with subsequent Ar RF plasma treatment at 100W and SOmtorr (a) and (b) on TMS plasma polymer, treatment time 1.0 min, (c) on TMS/CH4 plasma polymer, treatment time 2.0 min, (d) on TMS/CH4 plasma polymer, treatment time 10.0 min the blue color (dark) in (b) is the color of TMS film, indicating that Parylene C film was peeled off.

Plasma polymer type, exposure time in air (h) RF plasma treatment before Parylene Dry Boiled in water for 1, 2, 4, 6, 8h... 

Vidaurre, E.F.C., Achete, C.A., Simao, R.A. and Habert, A.C. 2001. Surface modification of porous polymeric membranes by RF-plasma treatment. 

Radio-frequency (RF) plasma treatments in air (1.0 torr) produced enhanced ionic release from Co-Cr-Mo and Ti-6A1-4V alloys, without any improvement in biological behaviour (Kummer et al, 1992). Table 9.18 gives the Cr, Co and Ti concentrations obtained after 10 days exposure to cell culture fluid (DMEM with 10% FBS). The RF plasma-treated Ti-Al-V alloy shows a 3-fold increase after the plasma-treatment. 

Bedikjan L, Danesh P (1997) RF plasma treatment of porous silicon. J Non Cryst Solids 220 261-266... 

As mentioned above, friction experiments were carried out while varying two main parameters (i) the surface hydrophilicity and (ii) the conformation of HSA in the model lubricant solution. The results presented in this section are therefore organized as follows first, we document the physical effects of the RF-plasma treatment with respect to the surface properties of UHMWPE second, we report on temperature-depen-dent protein folding in solution before we describe the results of the friction measurements. 

Fig. 1. XPS survey from 0-1200eV binding energy after oxygen RF-plasma treatment the inset shows a detail spectmm of the Qs line with a three-component de-convolntion fit.

Perz and coworkers [17] earlier published Si 2p and C Is specUa of untreated and various plasma-treated samples of PMTFPS gum and elastomer. PMTFPS is affected by RF plasma treatment in much the same way as PDMS. Significant improvements in wettability are possible but the treatments are temporary and hydrophobic recovery is mostly complete within 24 hours. A related topic to preformed fluoropolymers is the introduction of fluorocarbon gases into the plasma to create fluorinated surface layers. In the specific example of the use of a CF4 plasma to treat PDMS surfaces [30], a fluorine content as high as 47% can be achieved. Unlike, for example, an oxygen plasma that produces a brittle surface, the CF4 treatment is not brittle. However, contrary to expectations, the CF4 treatment resulted in a decreased water contact angle, from 119° to 101° at 100 W, 300 s. This was attributed to possible side effects such as surface oxidation, chemical heterogeneity, and surface reorganization. 

RF Plasma Treatment of Neptune Grass Posidonia oceanica) A Facile Method to Achieve Superhydrophilic Surfaces for Dye Adsorption from... 

RF Plasma Treatment of Neptune Grass Posidonia oceanica) 307... 

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