Surface modifications of polycarbonate (PC) and polyethylene terephtalate (PET) by cold remote nitrogen plasma (CRNP)

1996 ◽  
Vol 352-354 ◽  
pp. 490-494 ◽  
Author(s):  
C. Jama ◽  
O. Dessaux ◽  
P. Goudmand ◽  
B. Mutel ◽  
L. Gengembre ◽  
...  
Keyword(s):  
Surface Modifications ◽  
Nitrogen Plasma ◽  
Polyethylene Terephtalate

Surface modifications of nitrogen-plasma-treated stainless steels

1993 ◽  
Vol 64 (3) ◽  
pp. 265-273 ◽  
Author(s):  
P. Gröning ◽  
S. Nowak ◽  
L. Schlapbach
Keyword(s):  
Stainless Steels ◽  
Surface Modifications ◽  
Nitrogen Plasma

Bronchial stereocilia in the immotile cilia syndrome: A case report

1984 ◽  
Vol 42 ◽  
pp. 52-53
Author(s):  
George Price ◽  
Lizardo Cerezo
Keyword(s):  
Surface Modifications ◽  
Respiratory Epithelium ◽  
Immotile Cilia ◽  
Kartagener's Syndrome ◽  
Membrane Blebs ◽  
Radial Spokes ◽  
Males And Females ◽  
Dynein Arms ◽  
Ultrastructural Finding ◽  
Ultrastructural Findings

Ultrastructural defects of ciliary structure have been known to cause recurrent sino-respiratory infection concurrent with Kartagener's syndrome. (1,2,3) These defects are also known to cause infertility in both males and females. (4) Overall, the defects are defined as the Immotile, or Dyskinetic Cilia Syndrome (DCS). Several ultrastructural findings have been described, including decreased number of cilia, multidirection orientation, fused and compound cilia, membrane blebs, excess matrix in the axoneme, missing outer tubular doublets, translocated doublets, defective radial spokes and dynein arms. A rare but noteworthy ultrastructural finding in DCS is the predominance of microvilli-like structures on the luminal surface of the respiratory epithelium. (5,6) These permanent surface modifications of the apical respiratory epithelium no longer resemble cilia but reflect the ultrastructure of stereocilia, similar to that found in the epidydimal epithelium. Like microvilli, stereocilia are devoid of microtubular ultrastructure in comparison with true cilia.

Argon Plasma Induced Surface Modifications For Resistless Patterning Of Aluminium Films

1991 ◽  
Vol 223 ◽  
Author(s):  
Neeta Agrawal ◽  
R. D. Tarey ◽  
K. L. Chopra
Keyword(s):  
Etch Rate ◽  
Argon Plasma ◽  
Surface Modifications ◽  
Surface Chemical ◽  
Plasma Exposure ◽  
X Ray ◽  
Aluminium Fluoride ◽  
A New Technique ◽  
Plasma Exposure Time ◽  
Surface Chemical Modification

ABSTRACTArgon plasma exposure has been used to induce surface chemical modification of aluminium thin films, causing a drastic change in etch rate in standard HNO3/CH3COOH/H3PO4 etchant. The inhibition period was found to increase with power and Ar plasma exposure time. Auger electron and x-ray photoelectron spectroscopies have indicated formation of an aluminium fluoride (AlF3) surface layer due to fluorine contamination originating from the residue left in the plasma chamber during CF4 processing. The high etch selectivity between unexposed and argon plasma exposed regions has been exploited as a new technique for resistless patterning of aluminium.

Coverage and Stability of NHx Terminated Cobalt and Ruthenium Surfaces: a First Principles Investigation

2019 ◽  
Author(s):  
Ji Liu ◽  
Michael Nolan
Keyword(s):  
Metal Surfaces ◽  
High Vacuum ◽  
Atomic Layer ◽  
Nitrogen Plasma ◽  
Operating Conditions ◽  
Ultra High Vacuum ◽  
Bridge Site ◽  
Stable Surface ◽  
Saturation Coverage ◽  
The Stability

<div>In the atomic layer deposition (ALD) of Cobalt (Co) and Ruthenium (Ru) metal using nitrogen plasma, the structure and composition of the post N-plasma NHx terminated (x = 1 or 2) metal surfaces are not well known but are important in the subsequent metal containing pulse. In this paper, we use the low-index (001) and (100) surfaces of Co and Ru as models of the metal polycrystalline thin films. The (001) surface with a hexagonal surface structure is the most stable surface and the (100) surface with a zigzag structure is the least stable surface but has high reactivity. We investigate the stability of NH and NH2 terminations on these surfaces to determine the saturation coverage of NHx on Co and Ru. NH is most stable in the hollow hcp site on (001) surface and the bridge site on the (100) surface, while NH2 prefers the bridge site on both (001) and (100) surfaces. The differential energy is calculated to find the saturation coverage of NH and NH2. We also present results on mixed NH/NH2-terminations. The results are analyzed by thermodynamics using Gibbs free energies (ΔG) to reveal temperature effects on the stability of NH and NH2 terminations. Ultra-high vacuum (UHV) and standard ALD</div><div>operating conditions are considered. Under typical ALD operating conditions we find that the most stable NHx terminated metal surfaces are 1 ML NH on Ru (001) surface (350K-550K), 5/9 ML NH on Co (001) surface (400K-650K) and a mixture of NH and NH2 on both Ru (100) and Co (100) surfaces.</div>

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