The effect of spectral resolution on the Raman spectra of polyaromatic hydrocarbons and beta-carotene mixtures

Alajtal, A. I. and Edwards, H. G. M. and Scowen, I. J. (2011) The effect of spectral resolution on the Raman spectra of polyaromatic hydrocarbons and beta-carotene mixtures. Journal of Raman Spectroscopy, 42 (2). pp. 179-185. ISSN 0377-0486

Full content URL: http://dx.doi.org/10.1002/jrs.2681

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Item Type:Article
Item Status:Live Archive

Abstract

The spectroscopic basis for extraterrestrial life-detection through the molecular signatures of relevant biomaterials is dependent upon several instrumental facilities which could effect the diagnostic interpretation of key Raman bands from relevant substances occurring together in the geological record. To this effect, the Raman spectra of several polyaromatic hydrocarbons have been investigated under different conditions of spectral resolution using FT-Raman-spectroscopy operating at 1064 nm laser excitation wavelength. The observed Raman spectra are considerably altered under different conditions of spectral resolution; in particular, the discrimination between several polyaromatic hydrocarbons and beta-carotene no longer becomes possible as the spectral resolution decreases. These results are relevant for the evaluation of miniaturised Raman spectrometers for space flight missions and incorporation into instrumentation for landers and rovers being proposed for future missions to Mars. Copyright © 2010 John Wiley & Sons, Ltd.

Additional Information:Article first published online: 6 MAY 2010
Keywords:Raman spectroscopy, Chemistry
Subjects:F Physical Sciences > F410 Forensic Science
F Physical Sciences > F180 Analytical Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:13024
Deposited On:19 Mar 2014 19:24

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