Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/37805
Title: SYNTHESIS AND STUDY OF 2D ATOMIC CRYSTAL: GRAPHENE FOR NEMS APPLICATIONS
Authors: MEENAKSHI ANNAMALAI
Keywords: graphene, exfoliation, nanoindentation, ripples, irradiation, helium ion microscope
Issue Date: 22-Jan-2013
Source: MEENAKSHI ANNAMALAI (2013-01-22). SYNTHESIS AND STUDY OF 2D ATOMIC CRYSTAL: GRAPHENE FOR NEMS APPLICATIONS. ScholarBank@NUS Repository.
Abstract: <p align="justify"> This study examines the mechanical properties of novel two-dimensional materials with an extensive emphasis on graphene and its potential applications. Nanomechanical graphene (monolayer and multilayer) devices were fabricated by mechanical exfoliation of graphite over trenches in SiO<sub>2</sub>. Mechanical properties and the effects of anchor geometry on the mechanical behaviour have been probed using atomic force microscopy (AFM). An analytical framework and finite element modelling has been proposed to support the experimental findings. The adopted test methods can be extended to characterize other nanomaterials and to elucidate this, results obtained from molybdenum disulfide (MOS<sub>2</sub>) have been presented. The first observation of surface morphology variation in few-layer graphene using AFM nanoindentation and thermal engineering of the ripples has been described. Graphene irradiation using helium ions and its effects on the mechanical properties has been studied for the very first time. The devices have also been patterned to obtain structures with sub -10 nm feature sizes using helium ion microscope.
URI: http://scholarbank.nus.edu.sg/handle/10635/37805
Appears in Collections:Ph.D Theses (Open)

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