Carbon cluster ions from low- and high-temperature glassy carbon, highly oriented pyrolytic graphite, and polycrystalline graphite

Michael A. May, Michael E. Huston, Matthew R Callstrom, Alan G. Marshall

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Carbon cluster ions have been produced by pulsed Nd:YAG laser desorption of four sp 2-hybridised carbon solids: glassy carbon-6 (GC-6), glassy carbon-25 (GC-25), highly oriented pyrolytic graphite (HOPG), polycrystalline graphite, and the oligomeric precursor to GC-6, poly(phenylenediacetylene). The desorbed ions were detected by Fourier transform ion cyclotron resonance mass spectrometry. Under similar laser and mass spectrometry conditions, polycrystalline graphite yielded abundant fullerene ions (C 44 + to C 124 +). GC-6, synthesized by a low-temperature route, gave increased ion populations from C 14 - to C 25 - relative to conventional GC-25. Laser desorption of the organic precursor, poly(phenylenediacetylene), yielded fullerenes from C 60 + to C 150 + in positive-ion mode, and C 3 - to C 10 - in negative-ion mode. The present results show that (a) pulsed laser desorption of polycrystalline graphite produces a higher yield of fullerene cations compared to other sp 2-type carbon solids, (b) low-mass carbon cluster ions from C 14 to C 30 are consistently produced from all four carbon solids as positive ions but not as negative ions, and (c) no fullerene anions are produced from any of the carbon solids under these experimental conditions, implying different formation mechanisms for positive and negative carbon cluster ions.

Original languageEnglish (US)
Pages (from-to)648-651
Number of pages4
JournalChemistry of Materials
Volume5
Issue number5
StatePublished - 1993
Externally publishedYes

Fingerprint

Carbon clusters
Graphite
Glassy carbon
Fullerenes
Ions
Carbon
Desorption
Negative ions
Positive ions
Temperature
Mass spectrometry
Lasers
Cyclotron resonance
Pulsed lasers
Anions
Cations
Fourier transforms

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Carbon cluster ions from low- and high-temperature glassy carbon, highly oriented pyrolytic graphite, and polycrystalline graphite. / May, Michael A.; Huston, Michael E.; Callstrom, Matthew R; Marshall, Alan G.

In: Chemistry of Materials, Vol. 5, No. 5, 1993, p. 648-651.

Research output: Contribution to journalArticle

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T1 - Carbon cluster ions from low- and high-temperature glassy carbon, highly oriented pyrolytic graphite, and polycrystalline graphite

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AU - Marshall, Alan G.

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N2 - Carbon cluster ions have been produced by pulsed Nd:YAG laser desorption of four sp 2-hybridised carbon solids: glassy carbon-6 (GC-6), glassy carbon-25 (GC-25), highly oriented pyrolytic graphite (HOPG), polycrystalline graphite, and the oligomeric precursor to GC-6, poly(phenylenediacetylene). The desorbed ions were detected by Fourier transform ion cyclotron resonance mass spectrometry. Under similar laser and mass spectrometry conditions, polycrystalline graphite yielded abundant fullerene ions (C 44 + to C 124 +). GC-6, synthesized by a low-temperature route, gave increased ion populations from C 14 - to C 25 - relative to conventional GC-25. Laser desorption of the organic precursor, poly(phenylenediacetylene), yielded fullerenes from C 60 + to C 150 + in positive-ion mode, and C 3 - to C 10 - in negative-ion mode. The present results show that (a) pulsed laser desorption of polycrystalline graphite produces a higher yield of fullerene cations compared to other sp 2-type carbon solids, (b) low-mass carbon cluster ions from C 14 to C 30 are consistently produced from all four carbon solids as positive ions but not as negative ions, and (c) no fullerene anions are produced from any of the carbon solids under these experimental conditions, implying different formation mechanisms for positive and negative carbon cluster ions.

AB - Carbon cluster ions have been produced by pulsed Nd:YAG laser desorption of four sp 2-hybridised carbon solids: glassy carbon-6 (GC-6), glassy carbon-25 (GC-25), highly oriented pyrolytic graphite (HOPG), polycrystalline graphite, and the oligomeric precursor to GC-6, poly(phenylenediacetylene). The desorbed ions were detected by Fourier transform ion cyclotron resonance mass spectrometry. Under similar laser and mass spectrometry conditions, polycrystalline graphite yielded abundant fullerene ions (C 44 + to C 124 +). GC-6, synthesized by a low-temperature route, gave increased ion populations from C 14 - to C 25 - relative to conventional GC-25. Laser desorption of the organic precursor, poly(phenylenediacetylene), yielded fullerenes from C 60 + to C 150 + in positive-ion mode, and C 3 - to C 10 - in negative-ion mode. The present results show that (a) pulsed laser desorption of polycrystalline graphite produces a higher yield of fullerene cations compared to other sp 2-type carbon solids, (b) low-mass carbon cluster ions from C 14 to C 30 are consistently produced from all four carbon solids as positive ions but not as negative ions, and (c) no fullerene anions are produced from any of the carbon solids under these experimental conditions, implying different formation mechanisms for positive and negative carbon cluster ions.

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