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Comparing Vacuum and Extreme Ultraviolet Radiation for Postionization of Laser Desorbed Neutrals from Bacterial Biofilms and Organic Fullerenes

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posted on 24.07.2012, 00:00 authored by G. L. Gasper, L.K. Takahashi, J. Zhou, Musahid Ahmed, J.F. Moore, L. Hanley
Vacuum and extreme ultraviolet radiation from 8 - 24 eV generated at a synchrotron was used to postionize laser desorbed neutrals of antibiotic-treated biofilms and a modified fullerene using laser desorption postionization mass spectrometry (LDPI-MS). Results show detection of the parent ion, various fragments, and extracellular material from biofilms using LDPI-MS with both vacuum and extreme ultraviolet photons. Parent ions were observed for both cases, but extreme ultraviolet photons (16 - 24 eV) induced more fragmentation than vacuum ultraviolet (8 - 14 eV) photons.

Funding

This work is supported by the National Institute of Biomedical Imaging and 117 Bioengineering via grant EB006532. MA, LT, JZ and the ALS are supported by the Director,Office of Energy Research, Office of Basic Energy Sciences, Chemical Sciences Division of the U.S. Department of Energy under contract No. DE-AC02-05CH11231.

History

Publisher Statement

NOTICE: this is the author’s version of a work that was accepted for publication in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, [Vol 649, Issue 1, 2011 Sep 1] DOI: 10.1016/j.nima.2010.12.024. The original publication is available at www.elsevier.com.

Publisher

Elsevier

Language

en_US

issn

0168-9002

Issue date

01/09/2011

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