Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - Adhesion and dynamic nanotribology of graphene in polar and non-polar liquid environments studied with ultrasonic force microscopy
AU - Robinson, Benjamin
AU - Kay, Nicholas
AU - Kolosov, Oleg
PY - 2012
Y1 - 2012
N2 - 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).
AB - 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).
KW - graphene
KW - environment
KW - liquids
KW - gases
KW - UFM
KW - AFM
KW - ultrasonic force miocroscopy
M3 - Conference contribution/Paper
SN - 9781466562745
VL - 1
SP - 150
EP - 153
BT - NSTI-Nanotech 2012
PB - CRC PRESS-TAYLOR & FRANCIS GROUP
CY - Santa Clara, USA
ER -