e-Sequence: a sequential approach to engineer heteroatom doped graphene nanoribbons for electronic applications

Informazioni relative al progetto

e-Sequence

ID dell’accordo di sovvenzione: 722951

DOI

10.3030/722951

Progetto chiuso

Data della firma CE 2 Giugno 2017

Data di avvio 1 Novembre 2017

Data di completamento 31 Ottobre 2024

Finanziato da

• EXCELLENT SCIENCE - European Research Council (ERC)

Costo totale

€ 2 000 000,00

Contributo UE

€ 2 000 000,00

Coordinato da

UNIVERSIDAD DEL PAIS VASCO/ EUSKAL HERRIKO UNIBERTSITATEA
Spain

Periodic Reporting for period 5 - e-Sequence (e-Sequence: a sequential approach to engineer heteroatom doped graphene nanoribbons for electronic applications)

Periodo di rendicontazione: 2023-11-01 al 2024-10-31

Sintesi del contesto e degli obiettivi generali del progetto

Graphene nanoribbons (NR) are quasi-1D nanostructures with discrete band gaps, ballistic conduction, and one-atom thickness. Such properties make them ideal candidates to develop low-dimensional semiconductors, which are essential components in nanoelectronics. Atomically-precise control over the structure of NR (width, length, edge, doping) is crucial to fully exploit their potential. However, current approaches for the synthesis of NR suffer from several drawbacks that do not allow attaining such level of precision, therefore alternative methods need to be sought. e-Sequence has developed an unprecedented approach that assembles stepwise small molecular building blocks into NR to specifically target the most important challenges in NR synthesis. Such approach will enable the preparation of an unlimited number of NR with atomically-precise control over their structure, exceeding the limits of existing methods.

Lavoro eseguito dall’inizio del progetto fino alla fine del periodo coperto dalla relazione e principali risultati finora ottenuti

Graphene nanoribbon (GNR) properties are dominated by structural variables, such as edge structure, length, width, and heteroatom-doping, all requiring atomic precision to harness the full application potential of GNRs. Although the length influences key GNR properties, synthetic methods that allow control over the length remain underdeveloped, and the effects of length on GNR properties remain underexplored. We have developed a series of iterative approaches enabling the synthesis of a series of length-controlled, ultralong atomically precise GNRs. The longest GNR displays a 920-atoms core with a 35.8-nm long (147 linearly fused rings) backbone. The unprecedented solubility of these type of monodisperse GNRs enabled their purification by column chromatography and their investigation by a broad range of structural, optoelectronic, and redox characterization techniques. In addition, this GNR length control allowed us to unambiguously establishing correlations between GNR length and properties, particularly electrical conductivity.

Progressi oltre lo stato dell’arte e potenziale impatto previsto (incluso l’impatto socioeconomico e le implicazioni sociali più ampie del progetto fino ad ora)

We have developed a series of iterative approaches enabling the synthesis of a series of length-controlled, ultralong atomically precise GNRs. The convergent (accelerated) iterative synthesis of NRs developed has provided excellent results beyond our expectations in terms of lengths and solubility. This method has enabled the synthesis of nanoribbons with a 920-atoms core with a 35.8-nm long (147 linearly fused rings) backbone in just three synthetic steps from building blocks of 2 nm in length.

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