What is the resolution of FTIR?
Resolution is one of the measurement parameters involved in obtaining spectra with FTIR. The resolution can be set to values such as 16 cm-1, 8 cm-1, 4 cm-1, or 2 cm-1. It indicates the degree of fineness of the data obtained by measurement (i.e., the minimum peak interval that can be distinguished).
How does FTIR ATR work?
How Does ATR-FTIR Work? In ATR sampling, the infrared (IR) light travels through a crystal, is totally internally reflected at least once at the crystal-sample interface; and the reflected light travels to the FTIR detector.
What is time-resolved imaging?
Time-resolved cathodoluminescence imaging observes exponential probability distribution for light decay at a particular time delay.
What is time-resolved Raman spectroscopy?
Time-resolved Raman spectroscopy allows to address population dynamics of individual low-energy excitation modes after photo-excitation. Through detailed balance of the Stokes and anti-Stokes signals, the population number of different modes can be determined and calculated into effective mode temperatures.
What is gain in FTIR?
Gain The increase in the detector signal amplitude that is due to electronic amplification. Gain is used to increase the intensity of weak detector signals.
Why only KBr is used in IR?
KBr is used as a carrier for the sample in IR spectrum and it is optically transparent for the light in the range of IR measurement. So that no interference in absorbence would occur. KBr, has a transmittance of 100 % in the range of wave number (4000-400 cm-1). Therefore, it does not exhibit absorption in this range .
What is the difference between transmittance and absorbance in FTIR?
The main difference between absorbance and transmittance is that absorbance measures how much of an incident light is absorbed when it travels in a material while transmittance measures how much of the light is transmitted.
What is the main advantage of the ATR method?
ATR Principle As mentioned, the major benefit of ATR is the ability to measure a wide variety of solid and liquid samples without requiring complex preparations.
What is time resolved fluorescence?
Time-resolved fluorescence spectroscopy is a spectroscopy technique used to monitor interactions between molecules and motions that occur in the short periods. The ability to measure changes in the picosecond or nanosecond time range makes it a useful technique in biomolecular structure analysis and dynamics.
What is peak intensity in FTIR?
In FTIR, an increase in the peak intensity usually means an increase in the amount (per unit volume) of the functional group associated with the molecular bond, whereas a shift in peak position usually means the hybridization state or electron distribution in the molecular bond has changed.