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Adhesion and dynamic nanotribology of graphene in polar and non-polar liquid environments studied with ultrasonic force microscopy

Robinson, Benjamin and Kay, Nicholas and Kolosov, Oleg (2012) Adhesion and dynamic nanotribology of graphene in polar and non-polar liquid environments studied with ultrasonic force microscopy. In: NSTI-Nanotech 2012. CRC PRESS-TAYLOR & FRANCIS GROUP, Santa Clara, USA, pp. 150-153. ISBN 9781466562745

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Abstract

We report the characterisation of exfoliated few layer graphene (FLG) flakes using a range of scanning probe techniques. We have examined FLG and its substrate material, SiO2, in air, polar liquid (water) and non-polar liquid (dodecane) environments. We present analysis of absolute adhesion and relative friction between SPM probe and FLGH and examination of surface and subsurface nanoscale structure. Adhesion is greater in ambient conditions, due to water meniscus formation at the probe sample interface, than continuum liquid coverage. Friction shows no velocity dependence and is consistently lower for FLG than SiO2. The presence and dynamics of sub-surface delaminations and surface point defects are observed at a range of quantified normal forces (0 – 75 nN).

Item Type: Contribution in Book/Report/Proceedings
Uncontrolled Keywords: graphene ; environment ; liquids ; gases ; UFM ; AFM ; ultrasonic force miocroscopy
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 58427
Deposited By: ep_importer_pure
Deposited On: 18 Sep 2012 12:21
Refereed?: No
Published?: Published
Last Modified: 25 Mar 2014 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58427

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