Surface characterization of carbon surfaces by cold plasma treatment

Ohte, Takeo; Kojima, Akira; Katoh, Masaaki; Kamata, Kiichiro; Ohtani, Sugio

doi:10.1016/0008-6223(94)90024-8

Cited by 20 publications

(7 citation statements)

References 12 publications

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“…The treatment time needed to achieve the desired changes in fibre surface chemistry is of the order of several seconds to a few minutes. Subsequently, upon exposure of the plasma-treated material to the ambient, post-reaction aging effects lead to a restructuring of the surface towards a new stable thermodynamic equilibrium in which the chemistry may differ somewhat from that originally created by the plasma [29][30][31][32][33][34]. Carbon dangling bonds left behind by the plasma which had not chemisorbed oxygen when the treatment was over would be a source of further oxygen incorporation during storage.…”

Section: Introductionmentioning

confidence: 99%

Oxygen plasma modification of pitch-based isotropic carbon fibres

Boudou

Paredes

Cuesta

et al. 2003

Carbon

186

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International audienceAn isotropic carbon fibre was surface-treated by microwave oxygen plasma at different conditions and characterised by scanning electron microscopy (SEM), scanning tunneling microscopy (STM), N2/CO2 adsorption, Raman spectrometry, X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD). It is shown that the structure of the fibre suffers only limited alterations upon plasma treatment in such a way that the local disorder on its surface, which was already large in the fresh material, barely increases after the plasma exposure, as detected by Raman measurements. At the nanometre scale, STM images revealed a moderate increase in surface roughness. Evidence for chemical changes undergone by the fibre following the etching was provided by XPS and TPD, showing that stable oxygen functionalities were introduced by the plasma exposure, a result of practical importance for the application of this treatment not only to this type of carbon fibre, but to carbon materials in general. It was also observed that very gentle plasma exposures were generally sufficient to provide the fibre surface with a large amount of oxygen functional groups and that more intense treatments had a negative effect in this respect (i.e. they were not able to supply oxygen to the surface in larger amounts than the softer treatments did)

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Section: Introductionmentioning

confidence: 99%

Oxygen plasma modification of pitch-based isotropic carbon fibres

Boudou

Paredes

Cuesta

et al. 2003

Carbon

186

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“…The techniques for adding useful functions to their surfaces by the plasma have been developed [3]. We have studied the surface modification of the carbon materials and their mechanisms [4]. Also, the basic researches for the plasma treatment of the three-dimensional materials have been carried out [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation About the Change of Surface with Time on Modifying the Plastic Surface By Cold Plasma and Its Reduction Method.

Izumi

Ishihara

Ohte

et al. 1996

J. Photopol. Sci. Technol.

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The plastic films are modified by various plasmas (CF4, 02, Ar, N2) in order to know the difference of effects by kinds of their plasmas and the condition of the change of the surface characteristics with time after each plasma treatment is investigated in detail. Moreover, we developed the reduction method of its change with time. The condition of the surface modification by Ar plasma is similar to that of N2 plasma. But, that by 02 plasma was different from them. This reason is that the modification source is mainly ions on Ar plasma or N 2 plasma, and radicals on 02 plasma. The contact angle modified by Ar plasma (N2 plasma) became smaller than that by 02 plasma; 0° (Ar plasma), 35° (02 plasma).The contact angle after the plasma treatment was seldom reduced even if time passed when plastic film was treated by Ar plasma treatment with heating. The bounding property of oxygen atoms was controlled by heating in the plasma treatment. On the other hand, the change with time was not reduced by CF 4 plasma with heating. But, treatment effect had been slightly increased. It is considered that the fluorine atoms which are causes of hydrophobic property are introduced much, however, are removed much.

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“…contact angle with water ) of carbon materials change as time passes [6]- [7]. In this study, also measured the contact angle until 24 hours after the plasma treatment.…”

Section: Various Plasma Treatmentmentioning

confidence: 99%

Surface modifications of various carbon by fiuoric gas plasmas.

Katoh

Ohte

Kojima

et al. 1994

J. Photopol. Sci. Technol.

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This investigation was conducted on the surface modification of various carbon by radio-frequency (13.56 MHz) glow discharge plasmas with the objective of investigating the effects of fluoric gas plasmas on carbon surfaces and the mechanism of the elapsed variations of the various carbon surface after the plasma treatment. The surface of various carbon was treated by fluoric gas plasmas(SF6,CF4,C2F6,CHF3).The contact angles of water to the each carbon surface after the plasma treatment were measured and their elapse changes were investigated. The contact angle of three materiales increased by fluoric gas plasmas. CHF3 plasma was the most effecient of the plasmas we used. AG plate showed the largest angle in this case. Next we investigated the elapsed change of contact angle of each carbon material after CHF3 plasma treatment. The contact angle change with time was almost constant.The reasons for the elapsed changes are as follows. Three types in relation to the attachment of F atom are considered. In two types F part from the surface of materials. As a result, F quantity in surface decreases, and the contact angle reduces.

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Surface characterization of carbon surfaces by cold plasma treatment

Cited by 20 publications

References 12 publications

Oxygen plasma modification of pitch-based isotropic carbon fibres

Oxygen plasma modification of pitch-based isotropic carbon fibres

Investigation About the Change of Surface with Time on Modifying the Plastic Surface By Cold Plasma and Its Reduction Method.

Surface modifications of various carbon by fiuoric gas plasmas.

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