Experimental evidence of the capability of SERS technique to detect traces of adenine on Martian-type rock (Martian shergottite, DAG 670) were provided allowing a clear identification of this nucleobase as small trace (about 10-12 ÷ 10-13 g). We also demonstrated the use of red-light laser excitation helps to limit the fluorescence phenomena, while the use of LiCl-stabilised silver nanoparticle does not infer in the thecnique analytical performance allowing the use of this more stable Ag hydrosol.
Adenine Adsorbed on a Martian Meteorite as a Test Case for SERS Investigation of Extraterrestrial Life Trace / Stefano Caporali; Vanni Moggi-Cecchi; Maurizio Muniz-Miranda; Marco Pagliai; Giovanni Pratesi; Vincenzo Schettino. - ELETTRONICO. - (2011), pp. 4041-4041. (Intervento presentato al convegno Conference on Micro-Raman Spectroscopy and Luminescence Studies in the Earth and Planetary Sciences (CORALS II) tenutosi a Madrid, Spain nel May 18-20, 2011).
Adenine Adsorbed on a Martian Meteorite as a Test Case for SERS Investigation of Extraterrestrial Life Trace
CAPORALI, STEFANO;Vanni Moggi Cecchi;MUNIZ-MIRANDA, MAURIZIO;PAGLIAI, MARCO;PRATESI, GIOVANNI;SCHETTINO, VINCENZO
2011
Abstract
Experimental evidence of the capability of SERS technique to detect traces of adenine on Martian-type rock (Martian shergottite, DAG 670) were provided allowing a clear identification of this nucleobase as small trace (about 10-12 ÷ 10-13 g). We also demonstrated the use of red-light laser excitation helps to limit the fluorescence phenomena, while the use of LiCl-stabilised silver nanoparticle does not infer in the thecnique analytical performance allowing the use of this more stable Ag hydrosol.
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