Production of small binary carbon clusters by laser ablation of thin films of derivatised fullerenes
UNSPECIFIED (2003) Production of small binary carbon clusters by laser ablation of thin films of derivatised fullerenes. In: Symposium in Honor of Helmut Schwaz, AUG, 2003, BERLIN, GERMANY.Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/S1387-3806(03)00264-1
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 fullerene (C-60), hydrogenated and deuterated fullerenes (C60X36 where X - H and D), fluorinated fullerenes (C60Fx where x = 46 and 48) and the azafullerene 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)|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||INTERNATIONAL JOURNAL OF MASS SPECTROMETRY|
|Publisher:||ELSEVIER SCIENCE BV|
|Date:||15 August 2003|
|Number of Pages:||10|
|Page Range:||pp. 969-978|
|Title of Event:||Symposium in Honor of Helmut Schwaz|
|Location of Event:||BERLIN, GERMANY|
|Date(s) of Event:||AUG, 2003|
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