Graphene/graphite-based filament for thermal ionization

Hewitt, Joshua T.; Hall, Gregory; Schick, Charles R.

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Title: Graphene/graphite-based filament for thermal ionization

Abstract

Methods and systems for thermal ionization of a sample and formation of an ion beam are described. The systems incorporate a thermal ionization filament that is formed of a graphene-based material such as graphite, graphene, graphene oxide, reduced graphene oxide or combinations thereof. The filament material can be doped or chemically modified to control and tune the work function of the filament and improve ionization efficiency of a system incorporating the filament. The systems can be utilized in forming an ion beam for target bombardment or analysis via, e.g., mass spectrometry.

Inventors:: Hewitt, Joshua T.; Hall, Gregory; Schick, Jr., Charles R.

Issue Date:: Tue Aug 21 00:00:00 EDT 2018

Research Org.:: Savannah River Site (SRS), Aiken, SC (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1470735

Patent Number(s):: 10056218

Application Number:: 15/435,976

Assignee:: Savannah River Nuclear Solutions, LLC (Aiken, SC)

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J1/14 - characterised by the material
H01J1/15 - Cathodes heated directly by an electric current
H01J49/16 - using surface ionisation, e.g. field-, thermionic- or photo-emission

Show less

DOE Contract Number:: AC09-08SR22470

Resource Type:: Patent

Resource Relation:: Patent File Date: 2017 Feb 17

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Hewitt, Joshua T., Hall, Gregory, and Schick, Jr., Charles R. Graphene/graphite-based filament for thermal ionization.  United States: N. p., 2018. 
        Web.

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                    Hewitt, Joshua T., Hall, Gregory, & Schick, Jr., Charles R. Graphene/graphite-based filament for thermal ionization.  United States.

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                    Hewitt, Joshua T., Hall, Gregory, and Schick, Jr., Charles R. Tue .  
        "Graphene/graphite-based filament for thermal ionization".  United States.  https://www.osti.gov/servlets/purl/1470735.

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@article{osti_1470735,

  title        = {Graphene/graphite-based filament for thermal ionization},

  author       = {Hewitt, Joshua T. and Hall, Gregory and Schick, Jr., Charles R.},

  abstractNote = {Methods and systems for thermal ionization of a sample and formation of an ion beam are described. The systems incorporate a thermal ionization filament that is formed of a graphene-based material such as graphite, graphene, graphene oxide, reduced graphene oxide or combinations thereof. The filament material can be doped or chemically modified to control and tune the work function of the filament and improve ionization efficiency of a system incorporating the filament. The systems can be utilized in forming an ion beam for target bombardment or analysis via, e.g., mass spectrometry.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Aug 21 00:00:00 EDT 2018},

  month        = {Tue Aug 21 00:00:00 EDT 2018}

}

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Title: Graphene/graphite-based filament for thermal ionization

Abstract

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