Selective Grafting of Amine Groups on Polyethylene by Means of Modulated RF NH3 Plasmas

1998 ◽  
Vol 544 ◽  
Author(s):  
M. Creatore ◽  
G. Cicala ◽  
P. Favia ◽  
R. Lamendola ◽  
R. d'Agostno
Keyword(s):  
Electron Spectroscopy ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Surface Composition ◽  
Optical Emission ◽  
Active Species ◽  
Time Resolved ◽  
Glow Discharges ◽  
Before And After ◽  
Amine Groups

AbstractPlasma treatments in power modulated NH3 RF glow discharges have been performed for modifying the surface of polyethylene (PE). Time Resolved Optical Emission Spectroscopy (TR-OES) has been utilized for monitoring the emission of active species during the modulation period of the discharge, Electron Spectroscopy for Chemical Analysis (ESCA) has been used for studying the surface composition of PE before and after the derivatization of plasmagrafted -NH2 groups. We present our preliminary results here, which show how modulated NH3 plasmas can effectively improve the grafting selectivity of -NH2 respect to all other N-containing groups.

A Description of the Kinetics and Mechanisms which Control the Release of Hlw Elements from Synroc

1990 ◽  
Vol 212 ◽  
Author(s):  
K. L. Smith ◽  
K. P. Hart ◽  
G. R. Lumpkin ◽  
P. McGlinn ◽  
P. Lam ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Effect Of Temperature ◽  
Secondary Phases ◽  
Surface Layers ◽  
Before And After ◽  
Bicarbonate Solutions ◽  
Icp Mass Spectrometry ◽  
Kinetics Of

ABSTRACTLeaching tests were carried out on well-characterised Synroc C specimens containing 10 wt% simulated HLW. The effect of temperature and leachant composition on the mechanisms and kinetics of leaching were investigated by leaching Synroc specimens in deionised water at 70°C and 150°C, and in silicate and bicarbonate solutions at 70°C. SEM and TEM were used before and after leaching to characterise the primary and secondary phases in and on the Synroc samples, and to describe the morphological and chemical changes which occurred. Leachants were analysed using ICP/optical emission spectroscopy and ICP/mass spectrometry.Titaniferous surface layers were observed on the surface after exposure to leachants. Analysis of the leaching data has established that these surface layers can reduce the release of HLW elements from Synroc and that variations in temperature and leachant composition can hinder or promote the formation of secondary phases.

Optical emission spectroscopy of rf glow discharges of methane–silane mixtures

1998 ◽  
Vol 317 (1-2) ◽  
pp. 120-123 ◽  
Author(s):  
J.L Andújar ◽  
E Pascual ◽  
G Viera ◽  
E Bertran
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Glow Discharges

Study of the structure in rf glow discharges in SiH4/H2by spatiotemporal optical emission spectroscopy: Influence of negative ions

1990 ◽  
Vol 68 (11) ◽  
pp. 5532-5539 ◽  
Author(s):  
Fumiyoshi Tochikubo ◽  
Akira Suzuki ◽  
Shigeru Kakuta ◽  
Yuko Terazono ◽  
Toshiaki Makabe
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Negative Ions ◽  
Optical Emission ◽  
Glow Discharges

scholarly journals Профильный анализ пленок ферритов-гранатов методом оптической эмиссионной спектроскопии тлеющего разряда

2021 ◽  
Vol 91 (2) ◽  
pp. 352
Author(s):  
А.А. Федоренко ◽  
В.Н. Бержанский ◽  
А.В. Каравайников ◽  
А.Н. Шапошников ◽  
А.Р. Прокопов
Keyword(s):  
Glow Discharge ◽  
Elemental Composition ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Profile Analysis ◽  
Optical Emission ◽  
Transition Layers ◽  
Ferrite Garnet ◽  
Before And After

Annotation.The paper presents the results of experiments on the application of the method of optical emission spectroscopy of a glow discharge for the profile analysis of vacuum-deposited single and two-layer films of multicomponent garnet ferrites of various compositions before and after crystallization annealing. The presence of internal and external transition layers was revealed, and the modification of their elemental composition during crystallization, as well as the different sequence of synthesis of individual components in ferrite-garnet heterostructures, was investigated.

Onset of optical emission in femtosecond laser-induced plasmas and its correlation with surface dynamics monitored by pump–probe time-resolved microscopy

2019 ◽  
Vol 34 (10) ◽  
pp. 2119-2125 ◽  
Author(s):  
I. Carrasco-García ◽  
José M. Vadillo ◽  
J. Javier Laserna
Keyword(s):  
Femtosecond Laser ◽  
Time Scales ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Surface Dynamics ◽  
Time Resolved ◽  
Pump Probe ◽  
Molecular Emission ◽  
Probe Microscope

Femtosecond time-resolved images acquired by using a two-color pump–probe microscope have been used in combination with optical emission spectroscopy to determine the time scales for the onset of atomic and molecular emission in laser-induced plasmas.

Optical emission spectroscopy of the active species in nitrogen plasma

2006 ◽  
Vol 14 (1) ◽  
pp. 61-70 ◽  
Author(s):  
A. Qayyum ◽  
Shaista Zeb ◽  
M. A. Naveed ◽  
S. A. Ghauri ◽  
A. Waheed ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Nitrogen Plasma ◽  
Active Species
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