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.

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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)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Publisher:	ELSEVIER SCIENCE BV
ISSN:	1387-3806
Date:	15 August 2003
Volume:	228
Number:	2-3
Number of Pages:	10
Page Range:	pp. 969-978
Publication Status:	Published
Title of Event:	Symposium in Honor of Helmut Schwaz
Location of Event:	BERLIN, GERMANY
Date(s) of Event:	AUG, 2003
URI:	http://wrap.warwick.ac.uk/id/eprint/9433

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