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Raman Measurements under Simulated Martian conditions

Haezeleer, B. and Böttger, Ute and Hübers, Heinz-Wilhelm and de Vera, Jean Pierre Paul and Fox, S. and Strasdeit, H. (2014) Raman Measurements under Simulated Martian conditions. EANA 2014, 13.-16. Okt. 2014, Edinburgh, UK.

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Official URL: http://www.astrobiology.ac.uk/files/2013/03/Abstract-Book-EANA.pdf

Abstract

Raman spectroscopy is generally regarded as nondestructive. It is easy to apply, as no extensive sample preparation is necessary. As part of the ExoMars mission 2018, a compact Raman laser spectrometer (RLS) will analyze the mineral composition of the Martian soil and in particular search for organic matter [1]. Considering the possibility that life once evolved on Mars, its chemical traces may be detectable in Martian mineral matrices [2]. Our investigations on biomolecules have shown that high laser powers can influence the spectral outcome and even lead to complete sample destruction. To ascertain parameters and sample preparations favorable for an application on Mars, we developed a new measuring set-up simulating Martian environmental factors. Using a cryostat as simulation chamber, the samples were cooled down stepwise to 200 K. To minimize the oxygen level, a special pump created a stable vacuum of ca. 10–6 mbar. Different sample types (powders, pellets) have been measured with increasing laser power. The results are quite revealing as they show a major influence of the physical properties of the samples.

Item URL in elib:https://elib.dlr.de/94151/
Document Type:Conference or Workshop Item (Speech)
Title:Raman Measurements under Simulated Martian conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haezeleer, B.Department of Bioinorganic Chemistry, Institute of Chemistry, University of Hohenheim, 70599 Stuttgart, GermanyUNSPECIFIED
Böttger, UteUte.Boettger (at) dlr.deUNSPECIFIED
Hübers, Heinz-WilhelmHeinz-Wilhelm.Huebers (at) dlr.deUNSPECIFIED
de Vera, Jean Pierre Pauljean-pierre.devera (at) dlr.deUNSPECIFIED
Fox, S.Department of Bioinorganic Chemistry, Institute of Chemistry, University of Hohenheim, Stuttgart, GermanyUNSPECIFIED
Strasdeit, H.Department of Bioinorganic Chemistry, Institute of Chemistry, University of Hohenheim, Stuttgart, GermanyUNSPECIFIED
Date:13 October 2014
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Raman spectroscopy; simulated Mars cconditions; chemistry; detection
Event Title:EANA 2014
Event Location:Edinburgh, UK
Event Type:international Conference
Event Dates:13.-16. Okt. 2014
Organizer:UK Centre of Astrobiology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Deposited By: de Vera, Dr. Jean Pierre Paul
Deposited On:06 Jan 2015 14:52
Last Modified:31 Jul 2019 19:51

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