Results 271 to 280 of about 1,031,082 (303)

Plasma Fluorination versus Oxygenation of Polypropylene

The Journal of Physical Chemistry, 1996
CF4 and O2 glow discharge treatment of biaxially oriented polypropylene film results in the surface incorporation of fluorine and oxygen atoms, respectively, together with an increase in surface roughness. The stability and extent of substrate modification have been investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM)
J. Hopkins, R. D. Boyd, J. P. S. Badyal
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Oxygen ion source with plasma cathode

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1992
Abstract An ion source with a plasma cathode has been developed for long lifetime use in ion implanters. In this ion source, a plasma cathode replaces the conventional metallic filament used in a Freeman-type ion source. This ion source consists of two compartments, namely a plasma generator and an ion source chambers interconnected by a tapered ...
E. Yabe, K. Takahashi, K. Takagi, K. Takayama   +3 more
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Cold oxygen plasma oxidation of coal

Fuel, 1990
Abstract Cold oxygen plasma oxidation (CoPo) is shown to be a selective procedure for the oxidation of the organic matter of coal. Analysis of oxidation products by infrared spectroscopy showed that CoPo and molecular oxygen give quite different results, and that there are differences in the behaviour of certain CH groups during CoPo.
I KOROBETSKII, N BALABANOVA, V POPOV, V BUTAKOVA, N RUSJNOVA   +4 more
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QUENCHING OF SINGLET OXYGEN BY HUMAN PLASMA

Photochemistry and Photobiology, 1990
Abstract— Direct measurements of the decay of singlet oxygen phosphorescence at 1270 nm were made in human plasma diluted with various amounts of deuterium oxide. The Stern‐Volmer plot of the singlet oxygen lifetimes was linear up to 15% plasma concentration (vol/vol).
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Mechanistic studies of oxygen plasma etching

Journal of Vacuum Science & Technology B: Microelectronics Processing and Phenomena, 1988
Oxygen dissociation was measured in reactive ion etching (RIE) plasmas using a quadrupole mass spectrometer which sampled the particle flux through a pinhole in the lower electrode of a parallel-plate reactor. The oxygen atom flux increased with increasing power and generally decreased with increasing pressure.
M. A. Hartney, W. M. Greene, D. S. Soane, D. W. Hess   +3 more
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Scaling laws for oxygen discharge plasmas

Technical Physics, 2002
A fluid model is used to simulate ICP discharges in oxygen for a wide range of conditions under which commercial plasma-chemical reactors typically operate. Simple scaling laws are constructed with which different parameters of discharge plasmas in electronegative gases can be readily estimated from the given external parameters—the specific input ...
E. A. Bogdanov, V. I. Kolobov, A. A. Kudryavtsev, L. D. Tsendin   +3 more
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Charged species profiles in oxygen plasma

Applied Physics Letters, 2000
The charged species profiles have been studied in oxygen plasma of asymmetrically driven capacitively coupled rf discharge. The electron (ne), negative (n), and positive (p) ion densities have been measured by Langmuir probe in a wide range of pressures (3–30 Pa) and interelectrode distances (2–10 cm).
S. V. Berezhnoj, C. B. Shin, U. Buddemeier, I. Kaganovich   +3 more
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Oxygen plasma etching of YAG crystals

Advances in Optical Thin Films VI, 2018
High surface quality of the optical elements is one of the key factors enabling their effective application in high power laser systems. In our work, commercially polished undoped YAG crystals were etched using low energy oxygen plasma. Surface roughness and optical properties were investigated using two different etching depths.
Naglis Kyžas, Alexandr Belosludtsev, Giedrius Abromavicius   +2 more
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Etching of Polymers by Oxygen Plasma

Proceedings, annual meeting, Electron Microscopy Society of America, 1968
Any electron microscopical study of the morphology of bulk polymers has throughout the years been hampered by the lack of any real ability to produce meaningful surface variations for replication. True etching of polymers should show crystalline and amorphous regions in some form of relief.
Virgil Peck, W. L. Carter
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Surface oxygen in plasma polymerized films

Journal of Materials Chemistry, 2009
For plasma polymerized (PP) thin films, many practical optical, electronic, sensing, and bio-applications are closely related to their surface properties. In particular, the surfaces of many PP films have a strong affinity for oxygen and moisture. Therefore, three different types of monomers which do not contain oxygen were selected to fabricate PP ...
Hao Jiang, John T. Grant, Jesse Enlow, Weijie Su, Timothy J. Bunning   +4 more
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