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    Anal Chem. 2003 Dec 15;75(24):7015-9.

    Graphite-coated nanoelectrospray emitter for mass spectrometry.

    Source

    Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA.

    Abstract

    A new, more rapid method for coating nanoelectrospray emitters with graphite is to use a vacuum deposition chamber and a graphite carbon electrode. This method allows for mass production of nanoelectrospray emitters in a short period of time. The emitters are laser-pulled borosilicate glass micropipets and have tapers of around 4 microm i.d. The conductive coating applied to the emitter is only 20-30 nm thick, allowing for optical transparency with the borosilicate emitters. The conductive coating is stable for a number of hours at the high voltages used for nanoelectrospray ionization and is durable in both positive and negative ion modes-even during electrical discharge. This stability will make it possible to couple these emitters with online separations such as capillary liquid chromatography or capillary electrophoresis.

    PMID:
    14670065
    [PubMed - indexed for MEDLINE]

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