Column: Molecular Spectroscopy Workbench

Jul 01, 2016
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
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
A look at maps of a ceramic composite used in the nose cone of the space shuttle.
Dec 01, 2015
Spectroscopists can use vibrational spectroscopy in conjunction with the correlation method to differentiate different crystalline forms of the same chemical compound. Here’s how to do it.
Nov 01, 2015
The last five years have produced a body of work describing the role of the plasmonic properties of metals in enhancing the signals in surface-enhanced Raman scattering (SERS). We now foresee production of surface-enhancing films and particles that could provide reproducible Raman signals for SERS use in environmental and biomedical studies.
Sep 01, 2015
External vibrational modes or low-energy phonons are very sensitive to crystal structure. Here, the author demonstrates the practicality of imaging low-energy phonons to characterize 2D crystals and provides some cautions to keep in mind.
Jun 01, 2015
There is growing interest in using Raman as a spectroscopic probe of biological systems based on its high information content, its compatibility with an aqueous environment, and the spatial resolution that is consistent with physical optics (as good as ~0.5 μm).
Mar 01, 2015
Resonance and off-resonance Raman spectroscopy and imaging are used to examine the spatial variation of the solid-state structure and electronic character of few-layer MoS2 flakes. Simultaneous acquisition of photoluminescence spectra with the Raman scattering provides complementary ways of rendering Raman and photoluminescence spectral images of thin-film MoS2.
Feb 01, 2015
There are multiple circumstances where characterization of a collection of particles has value to analysts. In some environments, materials are plagued by particulate contamination that impacts product quality..
Dec 01, 2014
Special Issues
Segmented channel waveguides have been fabricated in single-crystal KTiOPO4 through a topotactic process of partial cation exchange. The ion-exchanged waveguides maintain the high nonlinear susceptibility of KTiOPO4 to function as frequency doubling laser light sources
lorem ipsum