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Ultrafast electron dynamics in an amino acid measured by attosecond pulses (Contributo in atti di convegno)

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Ultrafast electron dynamics in an amino acid measured by attosecond pulses (Contributo in atti di convegno) (literal)

Anno

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Alternative label

Belshaw L.; Calegari F.; Duffy M.J.; Trabattoni A.; Poletto L.; Nisoli M.; Greenwood J.B. (2013)
Ultrafast electron dynamics in an amino acid measured by attosecond pulses
in Conference on Lasers and Electro-Optics, CLEO Europe 2013, Monaco (Germania), 13-16 maggio 2013
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Belshaw L.; Calegari F.; Duffy M.J.; Trabattoni A.; Poletto L.; Nisoli M.; Greenwood J.B. (literal)

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Conference on Lasers and Electro-Optics CLEO-QELS 2013, OSA Technical Digest Series (literal)

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Centre for Plasma Physics, School of Maths and Physics, Queen's University, Belfast, BT7 INN, United Kingdom; Politecnico di Milano, Department of Physics, CNR-IFN, 1-20133 Milan, Italy; Institute of Photonics and Nanotechnologies, CNR-IFN, 1-35131 Padua, Italy (literal)

Titolo

Ultrafast electron dynamics in an amino acid measured by attosecond pulses (literal)

Abstract

Electron transfer within a single molecule is the fundamental step of many biological processes and chemical reactions. It plays a crucial role in catalysis, DNA damage by ionizing radiation, photosynthesis, photovoltaics, and for switches based on molecular nano-junctions. The investigation of this process has been the subject of considerable research effort [1-2]. In this work we present the first direct measurement of ultrafast charge migration in a biomolecular building block, the amino acid phenylalanine, using attosecond pulses [3]. Clean plumes of isolated, neutral molecules were produced by laser induced acoustic desorption (LIAD] technique [4]. Phenylalanine molecules were irradiated by a short train of attosecond pulses produced by high-order harmonic generation in Xenon (the train was composed by two attosecond pulses], with a photon energy in the range 16-40 eV, followed at a variable temporal delay by a 6-fs visible/near infrared (500-950 nm, VIS/NIR} probe pulse. The parent and fragment ions produced were then extracted into a linear time of flight device for mass analysis. Figures l(a]-(b] showthe mass spectra obtained individually from the XUV and VIS/NIR pulses. © 2013 IEEE. (literal)

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