12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Mapping nanomechanical phenomena in graphene na...
View graph of relations

« Back

Mapping nanomechanical phenomena in graphene nanostructures using force modulation and ultrasonic force microscopy

Research output: Contribution in Book/Report/ProceedingsPaper

Published

Publication date2012
Host publicationNanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites
Place of publicationSanta Clara, Calif.
PublisherCRC PRESS-TAYLOR & FRANCIS GROUP
Pages282-285
Number of pages4
Volume1
ISBN (Electronic)978-1-4665-6278-3
ISBN (Print)978-1-4665-6274-5
Original languageEnglish

Abstract

Graphene is a novel nanomaterial that possesses outstanding electrical, thermal, and mechanical properties. Whereas its electronic properties are extensively studied, mechanical properties of graphene nanostructures are much less experimentally explored even for simple graphene structures. At the same time, the nanoscale morphology of atomically thin graphene films, including rippling at various length scales and inter-layer force interaction are directly modified by the substrate and local environment that in turn changes of local nanoscale mechanical properties of a graphene nanostructure. We use a combination of force sensitive scanning probe microscopies that combines low frequency and ultrasonic vibrations and enables mapping of wide dynamic range of stiffnesses from 0.02 to 2000 N/m with the lateral resolution of few nanometres. That allowed us to investigate results of residual stresses in supported graphene layers that revealed themselves as broken mechanical contact at the interface between graphene layer and the substrate, as well as to explore nanomechanical behaviour of suspended graphene film. We directly observed the transition of graphene layer deformation from plate to stretched membrane behaviour, and to create nanoscale maps of shell instability for few layer graphene sheets, providing insight to the stresses in the free standing graphene films.

Related research outputs