Ammonia Plasma Treatment of PTFE Under Known Plasma Conditions

Pringle, Steven D.; Joss, V S; Jones, C.

doi:10.1002/(sici)1096-9918(199611)24:12<821::aid-sia189>3.0.co;2-b

Cited by 62 publications

(47 citation statements)

References 20 publications

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“…286.0 ± 0.3 eV* [61,123,124] pentafluorobenzaldehyde (PFB) Fluorine (F 1s) [125] para-chlorobenzaldehyde (pCB) Chlorine (Cl 2p) [126] trifluoroacetic anhydride (TFAA)…”

Section: Page 36 Of 52mentioning

confidence: 99%

Challenges in the characterization of plasma polymers using XPS

Nisol

Reniers

2015

Journal of Electron Spectroscopy and Related Phenomena

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“…286.0 ± 0.3 eV* [61,123,124] pentafluorobenzaldehyde (PFB) Fluorine (F 1s) [125] para-chlorobenzaldehyde (pCB) Chlorine (Cl 2p) [126] trifluoroacetic anhydride (TFAA)…”

Section: Page 36 Of 52mentioning

confidence: 99%

Challenges in the characterization of plasma polymers using XPS

Nisol

Reniers

2015

Journal of Electron Spectroscopy and Related Phenomena

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“…Miller and Baird have addressed the plasma decomposition of NH 3 in radio-frequency plasmas, 17 while Pringle et al have addressed the ion chemistry in a helical resonator. 18 These studies have not addressed the chemistry involved in ammonia radical production in detail. These radical species, however, are very likely most important during surface treatment.…”

Section: Introductionmentioning

confidence: 99%

Density and production of NH and NH2 in an Ar–NH3 expanding plasma jet

Oever

Helden

Lamers

et al. 2005

Journal of Applied Physics

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The densities of NH and NH 2 radicals in an Ar-NH 3 plasma jet created by the expanding thermal plasma source were investigated for various source-operating conditions such as plasma current and NH 3 flow. The radicals were measured by cavity ringdown absorption spectroscopy using the ͑0,0͒ band of the A 3 ⌸ ← X 3 ⌺ − transition for NH and the ͑0,9,0͒-͑0,0,0͒ band of the Ã 2 A 1 ← X 2 B 1 transition for NH 2 . For NH, a kinetic gas temperature and rotational temperature of 1750± 100 and 1920± 100 K were found, respectively. The measurements revealed typical densities of 2.5 ϫ 10 12 cm −3 for the NH radical and 3.5ϫ 10 12 cm −3 for the NH 2 radical. From the combination of the data with ion density and NH 3 consumption measurements in the plasma as well as from a simple one-dimensional plug down model, the key production reactions for NH and NH 2 are discussed.

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“…This indicates that little NH 3 dissociation occurred, and water dissociated into highly oxidative hydroxyl radicals in excited states (OH*) and H atoms and may produce more NH 3 + ions, which may be a key species involved in defluorination. Pringle et al (1996) found that greater defluorination occurred under conditions that produced high concentration of NH 3 + ions [11]. An NH 3 + ion is a cationic radical.…”

Section: Ar/nh 3 -H 2 O Plasma For Ptfe Surface Modificationmentioning

confidence: 99%

A Spectroscopic Study on Argon-Ammonia Water Gaseous Plasma Super-hydrophilizing Polytetrafluoroethylene

Nguyen

Yajima

2017

J. Photopol. Sci. Technol.

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In this study, optical emission spectroscopy was used to investigate the advantages of using NH 3 and water with Ar gas plasma. All plasmas in this work were non-thermal plasma with T e higher than T g , especially in N 2 and Ar/NH 3 -H 2 O plasmas, T e , T v , T r and T g were 3.3×10 4 K (ca. 2.5 eV), 7×10 3 K (ca. 0.5 eV), 1×10 3 K, and 3.2×10 2 K, respectively. In the Ar/NH 3 -H 2 O plasma, similar to the Ar/H 2 O plasma, water dissociated readily to form OH and H radicals. On the other hand, in the PTFE surface treatment with Ar/NH 3 -H 2 O plasma, the suppression of NH 3 dissociation may be caused by the increased formation of NH 3 + , which may be a key species in promoting defluorination. Simultaneously, the higher OH radical concentration may increase more the number of polar groups bound to the polymer surface to decrease the WCA and to make PTFE surface super hydrophilic.

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Ammonia Plasma Treatment of PTFE Under Known Plasma Conditions

Cited by 62 publications

References 20 publications

Challenges in the characterization of plasma polymers using XPS

Challenges in the characterization of plasma polymers using XPS

Density and production of NH and NH2 in an Ar–NH3 expanding plasma jet

A Spectroscopic Study on Argon-Ammonia Water Gaseous Plasma Super-hydrophilizing Polytetrafluoroethylene

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