Gas Phase Spectroscopy of a Ge Film LCVD Reactor

1983 ◽  
Vol 29 ◽  
Author(s):  
J. F. Osmundsen ◽  
C. C. Abele ◽  
J. G. Eden
Keyword(s):  
Gas Phase ◽  
Excited States ◽  
Emission Spectroscopy ◽  
Laser Intensity ◽  
Gas Pressure ◽  
Absorption And Emission ◽  
Simultaneous Absorption ◽  
Krf Laser ◽  
Absorption And Emission Spectroscopy ◽  
Gas Phase Spectroscopy

ABSTRACTThe gas phase photochemistry of an LCVD reactor used to grow polycrystalline Ge films was studied by absorption and emission spectroscopy. Upon photodissociating GeH4 (5% in an Ar or He carrier) at 248 nm (KrF laser), excited states of Ge and GeH are produced. Spatially, spectrally and temporally resolved atomic and molecular emissions are monitored as a function of gas pressure and laser intensity. These data lead to the conclusion that GeH2 is predominantly produced directly from GeH4 by The simultaneous absorption of two 5 eV (λ = 248 nm) photons.

scholarly journals Two Symmetrical Squarylium Cyanine Dyes: Synthesis, Photophysics and Antifungal Activity in Saccharomyces cerevisiae

2020 ◽  
Vol 3 (1) ◽  
pp. 106
Author(s):  
Vanessa S. D. Gomes ◽  
João C. C. Ferreira ◽  
Renato E. F. Boto ◽  
Paulo Almeida ◽  
Maria João M. F. Sousa ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Minimum Inhibitory Concentration ◽  
Antifungal Activity ◽  
Emission Spectroscopy ◽  
Inhibitory Concentration ◽  
Analytical Techniques ◽  
Cyanine Dyes ◽  
Absorption And Emission ◽  
Nir Absorption ◽  
Absorption And Emission Spectroscopy

Two squarylium cyanine dyes were synthesized and characterized by the usual analytical techniques, including Vis-NIR absorption and emission spectroscopy. Their antifungal activity was evaluated, through the obtention of minimum inhibitory concentration (MIC) values, using yeasts of the species Saccharomyces cerevisiae as a biological model.

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