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          Institute: Fritz-Haber-Institut     Collection: Molecular Physics     Display Documents



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ID: 493271.1, Fritz-Haber-Institut / Molecular Physics
Catching proteins in liquid helium droplets
Authors:Bierau, Frauke; Kupser, Peter; Meijer, Gerard; Helden, Gert von
Language:English
Date of Publication (YYYY-MM-DD):2010-09-24
Title of Journal:Physical Review Letters
Journal Abbrev.:PRL
Volume:105
Start Page:133402-1
End Page:133402-4
Copyright:©2010 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:An experimental approach is presented that allows for the incorporation of large mass/charge selected ions in liquid helium droplets. It is demonstrated that droplets can be efficiently doped with a mass/charge selected amino acid as well as with the much bigger m≈12 000 amu protein Cytochrome C in selected charge states. The sizes of the ion-doped droplets are determined via electrostatic deflection. Under the experimental conditions employed, the observed droplet sizes are very large and range, dependent on the incorporated ion, from 10¹⁰ helium atoms for protonated Phenylalanine to 10¹² helium atoms for Cytochrome C. As a possible explanation, a simple model based on the size- and internal energy-dependence of the pickup efficiency is given.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
Identifiers:URL:http://link.aps.org/doi/10.1103/PhysRevLett.105.13...
DOI:0.1103/PhysRevLett.105.133402
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1008.3816v2.pdf  [408,00 Kb] [Comment:arXiv:1008.3816v2 [physics.atm-clus] 29 Sep 2010]  
 
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