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Production of small binary carbon clusters by laser ablation of thin films of derivatised fullerenes
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UNSPECIFIED (2003) Production of small binary carbon clusters by laser ablation of thin films of derivatised fullerenes. In: Symposium in Honor of Helmut Schwaz, BERLIN, GERMANY, AUG, 2003. Published in: INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 228 (2-3). pp. 969-978. doi:10.1016/S1387-3806(03)00264-1 ISSN 1387-3806.
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Official URL: http://dx.doi.org/10.1016/S1387-3806(03)00264-1
Abstract
The distribution of small carbon clusters derived by laser ablation (laser desorption/ionization) of thin films of derivatised fullerenes has been studied. The production of positive and negative ions has been monitored by time-of-flight (ToF) mass spectrometry. The materials under investigation included the [60]fullerene (C-60), hydrogenated and deuterated [60]fullerenes (C60X36 where X - H and D), fluorinated [60]fullerenes (C60Fx where x = 46 and 48) and the aza[60]fullerene dimer ((C59N)(2)). Following laser ablation using a nitrogen laser, the efficient formation of small, negatively charged carbon clusters has been observed, while the corresponding positively charged clusters were not formed. Derivatised fullerenes display the co-formation of small binary carbon clusters of the type CnX-, where n shows odd/even alternation depending on X which represents the heteroatom initially linked to or networked with the fullerene cage. Although binary carbon clusters CnX- were formed where X = H, D and N, the ablation of fluorofullerene targets would not lead to the formation of CnF- clusters under the applied conditions, as confirmed by ablation experiments with chloro/fluoroalky-polymers. The formation of the binary carbon clusters has been also studied by laser fluence-dependent production of CnD- ions from C60D36, and by the production of CnP- ions using a composite C-60/P-4 target. Possible pathways leading to small binary carbon clusters are addressed. (C) 2003 Elsevier B.V All rights reserved.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 1387-3806 | ||||
Official Date: | 15 August 2003 | ||||
Dates: |
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Volume: | 228 | ||||
Number: | 2-3 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 969-978 | ||||
DOI: | 10.1016/S1387-3806(03)00264-1 | ||||
Publication Status: | Published | ||||
Title of Event: | Symposium in Honor of Helmut Schwaz | ||||
Location of Event: | BERLIN, GERMANY | ||||
Date(s) of Event: | AUG, 2003 |
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