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Structure and Mesoscopic Characterization of Laser Ablated Carbon Nanoparticles in Water by Raman Scattering
Escuela Politec Nacl, Dept Fis, Apdo 17-12-866,Ladron de Guevara E11-253, Ec 170109, Quito, Ecuador..
Escuela Politec Nacl, Dept Fis, Apdo 17-12-866,Ladron de Guevara E11-253, Ec 170109, Quito, Ecuador..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
Escuela Politec Nacl, Dept Fis, Apdo 17-12-866,Ladron de Guevara E11-253, Ec 170109, Quito, Ecuador.;USFQ, Grp Ecuatoriano Estudio Expt & Teor Nanosistemas, N104-E, Quito, Ecuador..
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2016 (English)In: Optical Micro- And Nanometrology VI, 2016, UNSP 98900NConference paper, Published paper (Refereed)
Abstract [en]

Carbon nanoparticles (CNPs) have been synthesized by laser ablation of polycrystalline graphite in water using a pulsed Nd:YAG laser (1064 nm) with a width of 8 ns and characterized by Raman spectroscopy and atomic force microscopy. The characteristic sizes of CNPs in the supernantant are in the range of 1-2 nm and 10-50 nm with structures corresponding to amorphous and sp(2)-carbon, respectively. Raman spectra of the CNPs from the supernatant reveal a background as a consequence of photoluminescence. The absence of a distinct Raman peak associated with hydrogenated amorphous carbon (a-C:H) suggests an other source for the photolominescence than a-C:H. Large (10-100 mu m) CNPs removed from the surface are unmodified (in structure and topology) by the laser as confirmed by Raman analysis.

Place, publisher, year, edition, pages
2016. UNSP 98900N
Series
Proceedings of SPIE, ISSN 0277-786X ; 9890
National Category
Atom and Molecular Physics and Optics Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-308524DOI: 10.1117/12.2231116ISI: 000381887800021ISBN: 9781510601352 (print)OAI: oai:DiVA.org:uu-308524DiVA: diva2:1049993
Conference
Conference on Optical Micro- and Nanometrology VI, APR 05-07, 2016, Brussels, BELGIUM
Available from: 2016-11-28 Created: 2016-11-28 Last updated: 2016-11-30Bibliographically approved

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