# Kinetic energy of free electrons affects MALDI positive ion yield via capture cross-section

Author(s) Dashtiev, Maxim, Frankevich, Vladimir, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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## Detailed Information

Title Kinetic energy of free electrons affects MALDI positive ion yield via capture cross-section
Author(s) Dashtiev, Maxim
Zenobi, Renato
Journal or Series Title The journal of physical chemistry. A
Volume Number 110
Issue Number 3
Start Page 926
End Page 930
ISSN 1089-5639
1520-5215
Publisher American Chemical Society
Publication Place Washington, DC
Publication Date 2006
Abstract A method for enhancing positive analyte ion signal in MALDI is described. The idea is based on influencing the kinetic energy of free electrons emitted from the organic/metal interface. It has been recently shown that free electrons in MALDI have energies around 1 eV. This energy is close to the maximum capture cross-section of most common MALDI matrices, leading to the efficient formation of negative matrix ions. This results in the reduction of the positive analyte ion yield. The effect can be minimized by shifting the kinetic energy of the electrons away from the maximum of the matrix capture cross-section by choosing a different substrate material.
DOI 10.1021/jp053343y
Additional Notes Received 21 June 2005, In final form 16 November 2005, Published online 22 December 2005
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 001723124
Source Database ID PP-24960
WOS-000235046100013
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@article{Dshtv2006,
author = "Dashtiev, Maxim and Frankevich, Vladimir and Zenobi, Renato",
title = "{K}inetic energy of free electrons affects {M}{A}{L}{D}{I} positive ion yield via capture cross-section",
journal = "The journal of physical chemistry. A",
year = 2006,
volume = "110",
number = "3",
pages = "926--930",
}


E-Citations record created: Thu, 01 Apr 2010, 16:14:54 CET