Ion–molecule reaction studies of mass selected carbon cluster ions formed by laser vaporization

1986 ◽  
Vol 85 (1) ◽  
pp. 632-633 ◽  
Author(s):  
S. W. McElvany ◽  
W. R. Creasy ◽  
A. O’Keefe
Keyword(s):  
Carbon Cluster ◽  
Cluster Ions ◽  
Laser Vaporization ◽  
Molecule Reaction

scholarly journals Mass spectrometry of refractory black carbon particles from six sources: carbon-cluster and oxygenated ions

2014 ◽  
Vol 14 (5) ◽  
pp. 2591-2603 ◽  
Author(s):  
J. C. Corbin ◽  
B. Sierau ◽  
M. Gysel ◽  
M. Laborde ◽  
A. Keller ◽  
...  
Keyword(s):  
Carbon Cluster ◽  
Cluster Ions ◽  
Laser Vaporization ◽  
Carbonaceous Particles ◽  
Mass Spectral ◽  
Carbon Particles ◽  
Fullerene Soot ◽  
Aerosol Mass ◽  
Combustion Particles ◽  
Refractory Particle

Abstract. We discuss the major mass spectral features of different types of refractory carbonaceous particles, ionized after laser vaporization with an Aerodyne high-resolution soot-particle aerosol mass spectrometer (SP-AMS). The SP-AMS was operated with a switchable 1064 nm laser and a 600 °C thermal vaporizer, yielding respective measurements of the refractory and non-refractory particle components. Six samples were investigated, all of which were composed primarily of refractory material: fuel-rich and fuel-lean propane/air diffusion-flame combustion particles; graphite-spark-generated particles; a commercial fullerene-enriched soot; Regal Black, a commercial carbon black; and nascent aircraft-turbine combustion particles. All samples exhibited a spectrum of carbon-cluster ions Cxn+ in their refractory mass spectrum. Smaller clusters (x < 6) were found to dominate the Cxn+ distribution. For fullerene soot, fuel-rich-flame particles and spark-generated particles, significant Cxn+ clusters at x &amp;gg; 6 were present, with significant contributions from multiply charged ions (n > 1). In all six cases, the ions C1+ and C3+ contributed over 60% to the total C1 5 were present. When such signals were present, C1+ / C3+ was close to 1. When absent, C1+ / C3+ was < 0.8. This ratio may therefore serve as a proxy to distinguish between the two types of spectra in atmospheric SP-AMS measurements. Significant refractory oxygenated ions such as CO+ and CO2+ were also observed for all samples. We discuss these signals in detail for Regal Black, and describe their formation via decomposition of oxygenated moieties incorporated into the refractory carbon structure. These species may be of importance in atmospheric processes such as water uptake and heterogeneous chemistry. If atmospherically stable, these oxidized species may be useful for distinguishing between different combustion sources. If unstable, they may provide a means to estimate the atmospheric age of an rBC sample. Future studies should attempt to establish which of these scenarios is more realistic.

Production of large carbon cluster ions by laser vaporization

1986 ◽  
Vol 130 (1-2) ◽  
pp. 17-19 ◽  
Author(s):  
A. O'Keefe ◽  
M.M. Ross ◽  
A.P. Baronavski
Keyword(s):  
Carbon Cluster ◽  
Cluster Ions ◽  
Laser Vaporization

Annealing Carbon Cluster Ions: A Mechanism for Fullerene Synthesis

1994 ◽  
Vol 98 (7) ◽  
pp. 1810-1818 ◽  
Author(s):  
Joanna M. Hunter ◽  
James L. Fye ◽  
Eric J. Roskamp ◽  
Martin F. Jarrold
Keyword(s):  
Carbon Cluster ◽  
Cluster Ions

Carbon cluster ions in laser-induced plasma

1988 ◽  
Vol 84 (1-2) ◽  
pp. 121-133 ◽  
Author(s):  
G. Seifert ◽  
S. Becker ◽  
H.-J. Dietze
Keyword(s):  
Carbon Cluster ◽  
Cluster Ions ◽  
Laser Induced Plasma

Reactions of small carbon cluster ions with HCN: a structural probe

1989 ◽  
Vol 12 (1-4) ◽  
pp. 567-570 ◽  
Author(s):  
D. C. Parent ◽  
S. W. McElvany
Keyword(s):  
Carbon Cluster ◽  
Cluster Ions ◽  
Structural Probe

FTMS studies of mass-selected, large cluster ions produced by direct laser vaporization

1987 ◽  
Vol 134 (3) ◽  
pp. 214-219 ◽  
Author(s):  
Stephen W McElvany ◽  
H.H Nelson ◽  
Andrew P Baronavski ◽  
Clifford H Watson ◽  
John R Eyler
Keyword(s):  
Large Cluster ◽  
Cluster Ions ◽  
Laser Vaporization ◽  
Direct Laser
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