Radio frequency plasma treatment

XPS data, on the other hand, showed that the ETC AT treatment of Ar + CF4 and Ar + C2F4 yielded just as good, if not better, fluorination of PET fibers than radio frequency plasma treatment with these gases [14,15]. These examples clearly demonstrate that polymerizable species in plasma polymerization are not photon-emitting species in most cases. This is in accordance with the growth and deposition mechanism based on free radicals, which account for the presence of large amount of dangling bonds in most plasma polymers. 

Plasma in MicroChannel, Fig. 3 Schematic of a radio frequency plasma treatment chamber... 

Pretreatment of carbon materials can significantly improve their catalytic activity toward ORR and change their electrochemical behavior. A variety of treatment methods have been used, including polishing the electrode, radio frequency plasma treatment, heating at low pressmes, in-situ laser irradiation. 

Reductive nitrosylation, transition metal nitrosyl complexes, 34 296-297 ReFejSj cluster, 38 41-43 self-assembly system, 38 41-42 Refining, of actinide metals, see Actinide, metals, purification Refractory compounds heat treatment of solids, 17 105-110 crystal growth, 17 105, 106 decomposition, 17 107,-110 spheroidization, 17 106, 107 preparation of, using radio-frequency plasma, 17 99-102... 

Evans, J. F., Kuwana, T., Introduction of Functional Groups onto Carbon Electrodes via Treatment with Radio-Frequency Plasma , Anal. Chem. 51 (1979) 358-365. 

Surface modification and metallization of poly(tetrafluoroethylene) (PTFE) has attracted a considerable attention from viewpoints of fundamental science and applied technology. PTFE has a low surface free energy while it shows excellent thermal and chemical stability. Therefore, the chemical and physical inertness of PTFE makes metallization an extremely difficult process. At present a chemical treatment using a sodium naphthalenide solution (1-4), a radio frequency plasma process (5-8), and electron/ion beam irradiation (9-//) have been employed for the modification of PTFE surface. 

From an electrochemical point of view, one might speculate that a fluorine surface termination would render the diamond electrode surface more resistant to oxidation and perhaps even less susceptible to adsorption (e.g. Teflon-like surface). Angus and coworkers fluorinated boron-doped, polycrystaUine diamond electrodes by exposure to a CF4 radio frequency plasma (88j. This is the only example, to the best of our knowledge, of an elechochem-ical study of an F-terminated diamond electrode. The XPS F/C atomic ratio was in the range of 0.16 to 0.18 after plasma treatment. The first voltammehic scan out to 2.5 V vs. SHE in 0.5 M H2SO4 produced... 

A wide variety of parameters can directly affect the chemical and physical characteristics of a plasma, which in turn affect the surface chemistry obtained by the plasma modification. Some of the more important parameters include electrode geometry, gas type, radio frequency (0-10 ° Hz), pressure, gas flow rate, power, substrate temperature, and treatment time. The materials and plasmas used for specific biomedical applications are beyond the scope of this text, but the applications include surface modification for cardiovascular, ophthalmological, orthopedic, pharmaceutical, tissue culturing, biosensor, bioseparation, and dental applications. 

Physical methods include plasma treatments, UV irradiation, corona discharge, and flame treatment. Among these, plasma treatment is widely used for the surface modification of synthetic polymers. Plasma can be obtained by exciting gases into an energetic state by radio frequency, microwave, or electrons from a hot filament discharge. Generation of plasma requires a vacuum, which normally poses several... 

Radio Frequency Argon Plasma Treatment of Parylene C Films... 

Radio frequency argon plasma treatment of Parylene C surfaces is very attractive because two processes—Parylene deposition and plasma treatment—can be carried out in the same reactor, the Parylene reactor. It was found that radio frequency... 

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