scholarly journals 10 nm deep, sub-nanoliter fluidic nanochannels on germanium for attenuated total reflection infrared (ATR-IR) spectroscopy

The Analyst ◽  
2017 ◽  
Vol 142 (2) ◽  
pp. 273-278 ◽  
Author(s):  
K. K. Sriram ◽  
Simantini Nayak ◽  
Stefanie Pengel ◽  
Chia-Fu Chou ◽  
Andreas Erbe
Keyword(s):  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Internal Reflection

Nanoslits with a depth of ∼10 nm were manufactured on a germanium internal reflection element for attenuated internal reflection infrared spectroscopy.

Infrared spectroscopy of highk thin layer by multiple internal reflection and attenuated total reflection

2003 ◽  
Vol 0 (8) ◽  
pp. 2961-2965 ◽  
Author(s):  
N. Rochat ◽  
K. Dabertrand ◽  
V. Cosnier ◽  
S. Zoll ◽  
P. Besson ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Internal Reflection

Determination of Triglycerides on Cotton Fabrics Using Fourier Transform Attenuated Total Reflection Infrared Spectroscopy

1985 ◽  
Vol 39 (6) ◽  
pp. 1047-1050 ◽  
Author(s):  
R. S. Shreedhara Murthy ◽  
D. E. Leyden ◽  
J. Keith Grime
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Cotton Fabric ◽  
Cotton Fabrics ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Triglycerides deposited on cotton fabric in the form of artificial body soil (ABS) were quantified with the use of ATR/FT-IR spectroscopy after ABS had been transferred onto the ATR crystal under pressure. This approach improved the signal-to-background ratio by avoiding interference from cellulose absorption, and improved precision as contact of the cloth sample with the ATR crystal was not necessary. ABS concentrations comparable to natural body soil levels were determined. This procedure was shown to be useful for following the depletion of “surface” ABS after different washing procedures.

Attenuated Total Reflection (ATR) Sampling in Infrared Spectroscopy of Heterogeneous Materials Requires Reproducible Pressure Control

2016 ◽  
Vol 71 (1) ◽  
pp. 97-104 ◽  
Author(s):  
Zhenyu Lu ◽  
Brianna M. Cassidy ◽  
Stephanie A. DeJong ◽  
Raymond G. Belliveau ◽  
Michael L. Myrick ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Pressure Sensor ◽  
Pressure Control ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Precise Control ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy, in which the sample is pressed against an internal reflection element, is a popular technique for rapid IR spectral collection. However, depending on the accessory design, the pressure applied to the sample is not always well controlled. While collecting data from fabrics with heterogeneous coatings, we have observed systematic pressure-dependent changes in spectra that can be eliminated by more reproducible pressure control. We also described a pressure sensor adapted to work with an ATR tower to enable more precise control of pressure during ATR sampling.

Optical Contact in ATR/FT-IR Spectroscopy

2001 ◽  
Vol 55 (10) ◽  
pp. 1352-1359 ◽  
Author(s):  
Sanong Ekgasit ◽  
Adchara Padermshoke
Keyword(s):  
Ir Spectroscopy ◽  
Air Gap ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Internal Reflection ◽  
Experimental Investigations ◽  
Transmission Spectra ◽  
Optical Contact ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Optical contact between an internal reflection element (IRE) and a sample is crucial for obtaining a good spectrum in an attenuated total reflection (ATR) experiment. When an air gap is present between the IRE and the sample, the spectrum severely deteriorates. Two techniques for determining the goodness of contact are proposed—first, by making a comparison between polarized ATR spectra and, second, by making a comparison between ATR and transmission spectra. When the optical contact is achieved, the normalized p-polarized ATR spectrum is exactly the same as the normalized s-polarized ATR spectrum. Moreover, the ratio between the normalized absorbance measured in the ATR mode and the normalized absorbance measured in the transmission mode equals the ratio between the frequency being considered and the normalization frequency. Theoretical and experimental investigations have been performed in order to verify the proposed techniques.

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