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Side-selective self-assembly of graphene and FLG on piezoelectric PVDF from suspension
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC.ORCID iD: 0000-0003-3701-4935
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.ORCID iD: 0000-0002-3687-4223
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik.
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2016 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 49, no 7, 07LT01Article in journal (Refereed) Published
Abstract [en]

The deposition of few-layer graphene by self-assembly from suspension onto a piezoelectric polymer substrate is presented. The graphene self-assembles with negligible overlap between flakes, and with high selectivity for one of the faces of the substrate, an observation which is discussed and rationalized. A computational study on a model system further confirms the theory and supports the experimental results. The highest obtained degree of surface coverage was estimated to 77%.

Place, publisher, year, edition, pages
2016. Vol. 49, no 7, 07LT01
Keyword [en]
graphene, PVDF, self-assembly, selective, deposition
National Category
Organic Chemistry Other Physics Topics Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-276051DOI: 10.1088/0022-3727/49/7/07LT01ISI: 000369403700001OAI: oai:DiVA.org:uu-276051DiVA: diva2:901846
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationThe Kempe Foundations
Available from: 2016-02-09 Created: 2016-02-09 Last updated: 2017-11-30Bibliographically approved
In thesis
1. Carbon Nanostructures – from Molecules to Functionalised Materials: Fullerene-Ferrocene Oligomers, Graphene Modification and Deposition
Open this publication in new window or tab >>Carbon Nanostructures – from Molecules to Functionalised Materials: Fullerene-Ferrocene Oligomers, Graphene Modification and Deposition
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The work described in this thesis concerns development, synthesis and characterisation of new molecular compounds and materials based on the carbon allotropes fullerene (C60) and graphene.

A stepwise strategy to a symmetric ferrocene-linked dumbbell of fulleropyrrolidines was developed. The versatility of this approach was demonstrated in the synthesis of a non-symmetric fulleropyrrolidine-ferrocene-tryptophan triad. A new tethered bis-aldehyde, capable of regiospecific bis-pyrrolidination of a C60-fullerene in predominantly trans fashion, was designed, synthesised and reacted with glycine and C60 to yield the desired N-unfunctionalised bis(pyrrolidine)fullerene. A catenane dimer composed of two bis(pyrrolidine)fullerenes was obtained as a minor co-product. From the synthesis of the N-methyl analogue, the catenane dimer could be separated from the monomeric main product and fully characterised by NMR spectroscopy. Working towards organometallic fullerene-based molecular wires, the N-unfunctionalised bis(pyrrolidine)fullerene was coupled to an activated carboxyferrocene-fullerene fragment by amide links to yield a ferrocene-linked fullerene trimer, as indicated by mass spectrometry from reactions carried out at small scale

A small library of conjugated diarylacetylene linkers, to be coupled to C60 via metal-mediated hydroarylation, was developed. Selected linker precursors were prepared and characterised, and the hydroarylation has been adapted using simple arylboronic acids.

Few-layer graphene was prepared and dip-deposited from suspension onto a piezoelectric polymer substrate. Spontaneous side-selective deposition was observed and, from the perspective of non-covalent interaction, rationalised as being driven by the inbuilt polarization of the polymer.

Aiming for selectively edge-oxidized graphene, a number of graphitic materials were treated with a combination of ozone and hydrogen peroxide under sonication. This mild, metal-free procedure led to edge-oxidation and exfoliation with very simple isolation of clean materials indicated by microscopy, spectroscopy, and thermogravimetric analysis.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2017. 64 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1537
Keyword
Fullerenes, Graphene, Deposition, Functionalization, Organometallic complexes
National Category
Organic Chemistry
Research subject
Chemistry with specialization in Organic Chemistry
Identifiers
urn:nbn:se:uu:diva-327189 (URN)978-91-513-0019-1 (ISBN)
Public defence
2017-09-22, A1:107a, BMC, Husargatan 3, Uppsala, 09:15 (English)
Opponent
Supervisors
Available from: 2017-08-28 Created: 2017-08-06 Last updated: 2017-09-08

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Nordlund, MichaelSanyal, BiplabGrennberg, Helena

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