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HREM and EELS analysis of fullerene-like carbon films
Univ Liverpool, Dept Mat Sci & Engn, Liverpool L69 3BX, Merseyside, England Fraunhofer Inst Mat & Beam Technol, D-01277 Dresden, Germany Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England Linkoping Univ, IFM, Dept Phys, S-58183 Linkoping, Sweden.
Univ Liverpool, Dept Mat Sci & Engn, Liverpool L69 3BX, Merseyside, England Fraunhofer Inst Mat & Beam Technol, D-01277 Dresden, Germany Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England Linkoping Univ, IFM, Dept Phys, S-58183 Linkoping, Sweden.
Univ Liverpool, Dept Mat Sci & Engn, Liverpool L69 3BX, Merseyside, England Fraunhofer Inst Mat & Beam Technol, D-01277 Dresden, Germany Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England Linkoping Univ, IFM, Dept Phys, S-58183 Linkoping, Sweden.
Univ Liverpool, Dept Mat Sci & Engn, Liverpool L69 3BX, Merseyside, England Fraunhofer Inst Mat & Beam Technol, D-01277 Dresden, Germany Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England Linkoping Univ, IFM, Dept Phys, S-58183 Linkoping, Sweden.
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1999 (English)In: Institute of Physics Conference Series, ISSN 0951-3248, E-ISSN 2154-6630, no 161, 369-372 p.Article in journal (Refereed) Published
Abstract [en]

Carbon thin films were grown by Laser-Arc deposition and their structure and bonding were examined using High Resolution Electron Microscopy (HREM) and Electron Energy Loss Spectroscopy (EELS). Through focal series of HREM images reveal that the film consists of curved graphene sheets forming swirls and concentric rings with a diameter of 4-6 nm. The sheet spacing was determined by selected area diffraction to be 0.363 nm. Contrast transfer function calculations are used to explain why the pattern formed by the curved sheets is more evident at Gaussian focus rather than at Scherzer defocus, Although the films demonstrate high microhardness and elastic recovery, qualitative assessment of the EELS spectra reveals that the film consists primarily of sp(2) hybridised carbon. A model is proposed to describe how such a material made of graphene sheets can exhibit such remarkable mechanical properties.

Place, publisher, year, edition, pages
1999. no 161, 369-372 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-49634OAI: oai:DiVA.org:liu-49634DiVA: diva2:270530
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Hultman, Lars

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