Infrared Difference Spectra of the Intermediates L, M, N, and O of the Bacteriorhodopsin Photoreaction Obtained by Time-Resolved Attenuated Total Reflection Spectroscopy

1997 ◽  
Vol 101 (49) ◽  
pp. 10542-10547 ◽  
Author(s):  
Christian Zscherp ◽  
Joachim Heberle
Keyword(s):  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Reflection Spectroscopy ◽  
Difference Spectra ◽  
Time Resolved

scholarly journals Toward Chalcogenide Platform Infrared Sensor Dedicated to the In Situ Detection of Aromatic Hydrocarbons in Natural Waters via an Attenuated Total Reflection Spectroscopy Study

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2449
Author(s):  
Marion Baillieul ◽  
Emeline Baudet ◽  
Karine Michel ◽  
Jonathan Moreau ◽  
Petr Němec ◽  
...  
Keyword(s):  
Natural Water ◽  
Natural Waters ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Infrared Sensor ◽  
Reflection Spectroscopy ◽  
Infrared Spectral ◽  
Micro Sensor ◽  
In Situ Detection

The objective of this study is to demonstrate the successful functionalization of the surface of a chalcogenide infrared waveguide with the ultimate goal of developing an infrared micro-sensor device. First, a polyisobutylene coating was selected by testing its physico-chemical compatibility with a Ge-Sb-Se selenide surface. To simulate the chalcogenide platform infrared sensor, the detection of benzene, toluene, and ortho-, meta- and para-xylenes was efficaciously performed using a polyisobutylene layer spin-coated on 1 and 2.5 µm co-sputtered selenide films of Ge28Sb12Se60 composition deposited on a zinc selenide prism used for attenuated total reflection spectroscopy. The thickness of the polymer coating was optimized by attenuated total reflection spectroscopy to achieve the highest possible attenuation of water absorption while maintaining the diffusion rate of the pollutant through the polymer film compatible with the targeted in situ analysis. Then, natural water, i.e., groundwater, wastewater, and seawater, was sampled for detection measurement by means of attenuated total reflection spectroscopy. This study is a valuable contribution concerning the functionalization by a hydrophobic polymer compatible with a chalcogenide optical sensor designed to operate in the mid-infrared spectral range to detect in situ organic molecules in natural water.

Terahertz cavity-enhanced attenuated total reflection spectroscopy

2005 ◽  
Vol 86 (20) ◽  
pp. 201116 ◽  
Author(s):  
Robert Schiwon ◽  
Gerhard Schwaab ◽  
Erik Bründermann ◽  
Martina Havenith
Keyword(s):  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Reflection Spectroscopy
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