Spatially resolved optical emission studies of fluorocarbon RF plasma through the use of UV-transmitting optical fibers

1985 ◽  
Vol 5 (2) ◽  
pp. 183-199 ◽  
Author(s):  
G. S. Selwyn ◽  
E. Kay
Keyword(s):  
Optical Fibers ◽  
Optical Emission ◽  
Rf Plasma ◽  
Spatially Resolved ◽  
Emission Studies

ZnCdO/ZnMgO and ZnO/AlGaN Heterostructures for UV and Visible Light Emitters

2005 ◽  
Vol 892 ◽  
Author(s):  
Andrei Osinsky ◽  
Jianwei Dong ◽  
J. Q. Xie ◽  
B. Hertog ◽  
A. M. Dabiran ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Compositional Analysis ◽  
Optical Emission ◽  
Rf Plasma ◽  
Light Emitters ◽  
Time Resolved ◽  
Light Emitting ◽  
Spatially Resolved ◽  
Time Resolved Photoluminescence ◽  
Made In

AbstractThis paper reviews of some of the progress made in the development of ZnO-based light emitting diodes (LEDs). n-ZnO/p-AlGaN-based heterostructures have been successfully for the fabrication of UV emitting LEDs that have operated at temperatures up to 650K, suggesting an excitonic origin for the optical transitions. RF-plasma-assisted molecular beam epitaxy has been used to grow epitaxial CdxZn1-xO films on GaN/sapphire structure. These films have a single-crystal wurtzite structure as demonstrated by structural and compositional analysis. High quality CdxZn1-xO films were grown with up to x=0.78 mole fraction as determined by RBS and SIMS techniques. Optical emission ranging from purple (Cd0.05Zn0.95O) to yellow (Cd0.29Zn0.71O) was observed. Compositional fluctuations in a Cd0.16Zn0.84O films were not detected by spatially resolved CL measurements, although intensity fluctuation with features of ∼0.5 μm diameter were seen on the intensity maps. Time resolved photoluminescence shows multi-exponential decay with 21 psec. and 49±3 psec. lifetimes, suggesting that composition micro-fluctuations may be present in Cd0.16Zn0.84O film.

scholarly journals Relevance for food sciences of quantitative spatially resolved element profile investigations in wheat ( Triticum aestivum ) grain

2013 ◽  
Vol 10 (84) ◽  
pp. 20130296 ◽  
Author(s):  
Paula Pongrac ◽  
Ivan Kreft ◽  
Katarina Vogel-Mikuš ◽  
Marjana Regvar ◽  
Mateja Germ ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Tissue Level ◽  
Emission Spectrometry ◽  
Bulk Analysis ◽  
Inductively Coupled ◽  
Element Concentrations ◽  
Spatially Resolved ◽  
Soil Zn

Bulk element concentrations of whole grain and element spatial distributions at the tissue level were investigated in wheat ( Triticum aestivum ) grain grown in Zn-enriched soil. Inductively coupled plasma mass spectrometry and inductively coupled plasma optical emission spectrometry were used for bulk analysis, whereas micro-proton-induced X-ray emission was used to resolve the two-dimensional localization of the elements. Soil Zn application did not significantly affect the grain yield, but did significantly increase the grain Ca, Fe and Zn concentrations, and decrease the grain Na, P and Mo concentrations; bulk Mg, S, K, Mn, Cu, Cd and Pb concentrations remained unchanged. These changes observed in bulk element concentrations are the reflection of tissue-specific variations within the grain, revealing that Zn application to soil can lead to considerable alterations in the element distributions within the grain, which might ultimately influence the quality of the milling fractions. Spatially resolved investigations into the partitioning of the element concentrations identified the tissues with the highest element concentrations, which is of utmost importance for accurate prediction of element losses during the grain milling and polishing processes.

Optical emission studies in Au/Ag nanoparticles

2007 ◽  
Vol 18 (36) ◽  
pp. 365701 ◽  
Author(s):  
A Longo ◽  
G P Pepe ◽  
G Carotenuto ◽  
A Ruotolo ◽  
S De Nicola ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Optical Emission ◽  
Emission Studies

scholarly journals The Twin-Nucleus Merging Galaxy MKN 266

1989 ◽  
Vol 134 ◽  
pp. 452-453
Author(s):  
J.B. Hutchings ◽  
S.G. Neff ◽  
J.H. van Gorkom
Keyword(s):  
Optical Emission ◽  
Physical Parameters ◽  
List Type ◽  
Imaging Data ◽  
Ccd Imaging ◽  
Spatially Resolved ◽  
The Galaxy ◽  
Extended Complex ◽  
Double Nucleus ◽  
Narrow Bands

We present results of observations of the double-nucleus galaxy Markarian 266 (NGC 5256) from 3 principal sources. These are 1:CCD imaging with the Canada-France-Hawaii telescope in broad and narrow bands. These indicate that the galaxy has extended, complex, faint outer plumes which indicate that a recent merger has occurred. The narrow-band images reveal remarkable knotty structure of the [O III] emitting gas, extending over the whole central part of the galaxy. This is not seen in Hα (see figure 1).2:21cm imaging with the VLA, covering velocity space near that of the optical nuclei. The continuum image reveals resolved triple structure, with the two outer peaks coincident with the optical nuclei. The 21cm velocity profiles indicate the presence of considerable H I absorption near the optical emission line velocities.3:Spatially resolved optical spectroscopy with the DAO 1.8m telescope. These data reveal the details of the [O III] velocity field and some of the physical parameters of the gas. The complexity and extended nature of the gas explains some conflicting redshift measurements in the literature. Together with the imaging data, we derive estimates of nuclear reddening and luminosity.

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