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NANOGRAPH Résumé de rapport

Project ID: 267160
Financé au titre de: FP7-IDEAS-ERC
Pays: Germany

Final Report Summary - NANOGRAPH (The Chemists Way of Making and Utilizing Perfect Graphenes)

Graphene has been attracting huge expectations as the potential material for wide-ranging applications, including electronic devices and energy converting systems as typical examples. The Nanograph project addressed both bottom-up and top-down approaches to selectively design and fabricate unprecedented graphene-based nanostructures with new properties. The strategies included the synthesis and processing of nm-sized graphenes (nanographenes), precursor concepts toward large graphenes and graphene nanoribbons (GNRs), the use of graphene-based materials in lithium ion batteries and fuel cells, and new design of electronic devices like field effect transistors, among other applications related to these aspects. Appropriate methods for the chemical and physical material characterization were also explored in cooperation with partners from academia and industry to elucidate these aspects.
Selected highlights are 1) the synthesis of novel nanographene molecules with varying structures, featuring not only armchair but also zig-zag and/or cove-edge configurations, 2) the selective edge functionalization of nanographene molecules for an enhanced solubility and modulated electronic properties, 3) the in-solution and on-surface bottom-up synthesis of atomically precise GNRs via oxidative cyclodehydrogenation of tailor-made polymeric precursors, 4). graphene-based mesoporous sheets for use in lithium ion batteries, 5) solution-processable graphene inks based on electrochemically exfoliated graphene for energy storage and conversion applications such as in ultrathin printable supercapacitors, 6) heteroatom-doped graphene-based materials for fuel cells applications, and 7) graphene-based electrode materials for field effect transistors and photodetectors. 
Especially, a number of structurally precise GNRs were achieved both by the solution- and surface-based methods, including GNRs with various modulated edge structures, i.e., armchair, cove, and zig-zag edges as well as hybrid of more than one of them. Armchair- and cove-type GNRs displayed large bandgaps, which are promising for future nanoelectronic and optoelectronic applications while zig-zag GNRs for the first time experimentally demonstrated the localized edge state, which had been predicted by the theory, suggesting their possible use in spintronic devices.

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