Chemical Vapour Deposition of Large-Domain Monolayer Graphene and the Preparation of a Crystalline C60 Thin-Film on Graphene (to be Studied by Ultrafast Electron Diffraction)

Freyer, P. (2016) Chemical Vapour Deposition of Large-Domain Monolayer Graphene and the Preparation of a Crystalline C60 Thin-Film on Graphene (to be Studied by Ultrafast Electron Diffraction). Master's Thesis / Essay, Physics.

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Abstract

This Master research project consisted in the preparatory work for investigating the first order phase transition of C60 by means of Ultrafast Electron Diffraction. To study the thin film in transmission geometry a suspended, 80 nm thick C60 crystal is needed. To achieve this, we firstly grew defect free graphene on copper foil by low pressure Chemical Vapour Deposition, secondly we transferred the graphene on to a TEM grid by copper etching and finally we deposited C60 onto the suspended graphene by sublimation. Here we present the growth of graphene on two different substrates, oxidized and oxygen rich copper foil. Raman characterization of the resulting graphene showed that it was defect free and only < 5 % of the surface was covered by bilayer graphene domains. Then we discuss how the deposition parameters of our C60 source was determined by growing few-layer C60 films on Ag(111). Furthermore we present our characterisation of monolayer and few-layer C60/Ag(111) by Low Energy Electron Diffraction. We found that C60 forms distinct rotational domains of size (2√3 × 2√3) and rotated by 47°, 30°, 13° and 0° with respect to the Ag(111) unit cell. We also briefly illustrate how we deposited C60 on graphene and demonstrate that Ultrafast Electron Diffraction can indeed be performed on such a sample.

Item Type:	Thesis (Master's Thesis / Essay)
Degree programme:	Physics
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	15 Feb 2018 08:14
Last Modified:	15 Feb 2018 08:14
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/14230

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