Molecular Spectroscopy Workbench Column

Sep 01, 2017
Spectroscopy
The Raman spectra of a particular face of a single crystal can be significantly different if acquired with different microscope objectives. This article explains the underlying physics of changes in relative intensity and even peak position of certain Raman bands depending on the microscope objective used to acquire the spectrum.
Jun 01, 2017
Spectroscopy
The resonance Raman spectra of carotenoids vary with subtle changes on the functional side groups, making these spectra useful for identifying and characterizing carotenoids.
Mar 01, 2017
Spectroscopy
This installment of “Molecular Spectroscopy Workbench” will help readers understand the underlying physics that affect the Raman spectra of crystalline and amorphous solids. Wave vector, reciprocal space, and the Brillouin zone are explained with respect to Raman spectroscopy of solids.
Feb 01, 2017
Spectroscopy
Controlling the orientation of the laser and Raman polarization relative to the sample orientation can provide a wealth of information. But it is easy to produce erroneous results, so you need to know what instrumental components affect the observed polarization effects and how the sample setup itself affects the Raman signal.
Dec 01, 2016
Spectroscopy
How can Raman spectroscopy be used to determine the temperature of a material when other more direct means are either impractical or not possible?
Nov 01, 2016
Spectroscopy
Cellulose is often chemically modified for a variety of uses in the pharmaceutical, food, and materials industries. By studying the Raman spectra of modified celluloses, we can identify spectroscopic features that can aid in the determination of physical and chemical properties of these materials.
Sep 01, 2016
Spectroscopy
Photoluminescence can provide information about the composition and solid-state structure of a material.
Jul 01, 2016
Spectroscopy
If you are not trained in Raman spectroscopy, how should you approach interpreting Raman spectra? This article explains what to do, along with some underlying fundamentals to orient you.
Mar 01, 2016
Spectroscopy
Here, we examine the problem of photoluminescence from the material being analyzed and the substrate on which it is supported. We then explain how to select an excitation wavelength that does not generate photoluminescence, reduces the noise level, and yields a Raman spectrum with a superior signal-to-noise ratio.
Feb 01, 2016
Spectroscopy
A look at maps of a ceramic composite used in the nose cone of the space shuttle.
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