NDLI: Monitoring nanoparticle formation during laser ablation of graphite in an atmospheric-pressure ambient

Content Provider	Springer Nature Link
Author	Landström, L. Márton, Zs. Boman, M. Heszler, P.
Copyright Year	2003
Abstract	Excimer laser ablation of highly oriented pyrolytic graphite (HOPG) was performed at atmospheric pressure in an N2 and in an air ambient. During the ablation, nanoparticles condensed from the material ejecta, and their size distribution was monitored in the gas phase by a Differential Mobility Analyzer (DMA) in combination with a Condensation Particle Counter (CPC). Size distributions obtained at different laser repetition rates revealed that the interaction between subsequent laser pulses and formed particles became significant above ∼15 Hz. This interaction resulted in laser heating, leading to considerable evaporation and a decrease in the size of the particles. X-ray photoelectron spectroscopy revealed that approximately 8% nitrogen was incorporated into the CNx particles generated in the N2 ambient, and that the nitrogen was mostly bonded to sp3-hybridized carbon. Monodisperse particles were also deposited and were analyzed by means of Raman spectroscopy to monitor size-induced effects.
Starting Page	537
Ending Page	542
Page Count	6
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	79
Issue Number	3
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-11-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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Monitoring nanoparticle formation during laser ablation of graphite in an atmospheric-pressure ambient