Raman Spectroscopy Under Liquid Nitrogen (RUN)

Compton, R. N.; Hammer, Nathan I.; Lambert, Ethan C.; Hager, J. Stewart

doi:10.1007/978-3-030-99395-5

Cited by 1 publication

(4 citation statements)

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“…Additionally, as the A g (1) mode features a radial displacement rather than a pentagonal pinch as with A g (2), it interacts with the surrounding ice to a higher degree and undergoes a larger change in depolarization ratio. The lower energy H g modes, H g (1-4), all show agreement as well: the symmetric modes H g (2) and H g (3) show increases in depolarization ratio and the antisymmetric 1 H g (1) and H g (4) modes show decreases in depolarization ratio as the symmetry is lowered. The higher energy H g modes all show decreases in ratio regardless of initial symmetry.…”

Section: Spectral Analysismentioning

confidence: 63%

“…Several methods have been implemented to combat fluorescence post‐data acquisition including baseline subtractions and curve‐fittings; [3] however, it is more desirable to eliminate laser‐induced fluorescence emission rather than correct for it. Experimental methods aimed at reducing fluorescence emission range from temperature‐controlled stages, cooling samples under vacuum, and pumping inert gas over samples [4] . These methods have shown to be effective in reducing fluorescence emission and sample degradation, but they are often complex and costly [4] .…”

Section: Introductionmentioning

confidence: 99%

“…Experimental methods aimed at reducing fluorescence emission range from temperature-controlled stages, cooling samples under vacuum, and pumping inert gas over samples. [4] These methods have shown to be effective in reducing fluorescence emission and sample degradation, but they are often complex and costly. [4] Surface enhanced Raman spectroscopy (SERS) [5,6] has been shown to amplify Raman signals significantly, allowing for less intense laser sources to be used, but the theoretical explanation for this enhancement is still somewhat misunderstood.…”

Section: Introductionmentioning

confidence: 99%

“…[4] These methods have shown to be effective in reducing fluorescence emission and sample degradation, but they are often complex and costly. [4] Surface enhanced Raman spectroscopy (SERS) [5,6] has been shown to amplify Raman signals significantly, allowing for less intense laser sources to be used, but the theoretical explanation for this enhancement is still somewhat misunderstood. SERS can also induce shifts vibrational frequencies.…”

Section: Introductionmentioning

confidence: 99%

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Guest‐Host Raman under Liquid Nitrogen Spectroscopy for the Acquisition of Improved Vibrational Spectra of Solids

et al. 2022

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Guest‐host Raman under liquid nitrogen spectroscopy (GHRUNS) is introduced whereby solid‐state guest molecules are isolated inside cage‐like host environments for the facile acquisition of their Raman spectra. This convenient method features reduced fluorescence, the analysis of populations in their ground states, and increased signal to noise ratios. Samples are also preserved through the reduction of thermal degradation and oxidation. To demonstrate the benefits of this new method, Raman spectra of the ubiquitous molecule C60 inside a cage of water ice are presented. Using this technique, a new normal mode of C60 is elucidated. The GHRUNS methodology is of interest to those seeking to acquire and characterize the vibrational spectra, structure, and properties of emissive, air‐sensitive molecules.

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Section: Spectral Analysismentioning

confidence: 63%